Home September 2014

September 2014

Editor’s Desk

0
During the two-minute segment, he gave a general overview of the device’s many features, most of which didn’t differ from other phones currently on the market.
 
At the end of his vocal sprint — reminiscent of a Micro Machines commercial — he felt the need to add the following: 
“Oh, and it makes phone calls.” 
 
That’s what we expect, right? A “phone” is useless if it can’t place or receive a call. With all the advancements in mobile technology, the cell carriers still tout the availability and robustness of their network above all else. 
 
We want to be able to make a call when we need to do so. When we can’t, we get frustrated. Think about it. How many times have you been driving down the highway and had the call drop out?
 
If you’re like me, you likely uttered something to the effect of: “What the what?! I just had four bars!”  
 
In that moment, our intense focus on that phone call is interrupted by something that is out of our control. If we were to look at the situation logically, we’d realize that we’re in-between cell towers. Coverage is limited when you’re moving in a direction that takes you through different zones. 
 
In other words, the bars can be misleading. 
 
I was reminded of this when browsing through AWEA’s U.S. Wind Industry Second Quarter 2014 Market Report — specifically the graphical representation of annual installed capacity reported over time. 
 
When separated into blocks of years, the installed capacity graph mimics the little icon at the top of your phone screen indicating signal strength. 
 
For the last several years, it looks as though the industry has been cruising down the highway at a pretty good clip, bouncing back and forth between cell towers — strong, then weak, then strong again. 
 
In 2013, we might as well have thrown up the “No Service” icon. But here we are, halfway through 2014, and judging solely by this graph, you’d think we’re scratching our heads and holding our phone skyward, searching for a signal. But that’s not the case. 
 
Again … the bars can be misleading. 
 
As AWEA’s Emily Williams points out in this issue of Wind Systems, there are currently more than 14 GW of wind projects currently under construction in the U.S. These projects are expected to be completed by the end of the year in order to take advantage of the Production Tax Credit. 
 
That’s not just traveling along jumping to a new cell tower. That’s upgrading from a flip phone to the iPhone 8. 
 
It’s an accomplishment worth celebrating. But before we get too carried away, please take into consideration what AWEA and other groups have been stressing for last few years — consistency and stability. 
 
In order to keep from dropping the call, we have to be focused on not dropping the ball. 
 
Can you hear me now? … Good.
 
Thanks for reading,

BOEM Defines Offshore Areas Off The Coast Of NC

0

In mid-August, the Bureau of Ocean Energy Management (BOEM) has defined three Wind Energy Areas offshore North Carolina, which total approximately 307,590 acres, for potential commercial wind energy development.  

The areas include the Kitty Hawk Wind Energy Areas (about 122,405 acres), the Wilmington West Wind Energy Areas (about 51,595 acres) and the Wilmington East Wind Energy Areas (about 133,590 acres).

“Today represents an important step forward for North Carolina in harnessing the vast wind energy potential along the Atlantic Coast to power homes and strengthen our clean energy economy,” Department of the Interior Secretary Sally Jewell said regarding the announcement. “This milestone is the result of collaboration with stakeholders and partners at all levels to identify areas off the coast with great resource potential while also minimizing conflicts with other important uses. We look forward to working with the state of North Carolina, industry and a broad range of stakeholders as this exciting process continues to further commercial wind development in the United States.”

BOEM has awarded five commercial wind energy leases off the Atlantic coast: two non-competitive leases (for the proposed Cape Wind project in Nantucket Sound and an area off Delaware) and three competitive leases (two offshore Massachusetts-Rhode Island and another offshore Virginia). The competitive lease sales generated more than $5 million in high bids for more than 277,500 acres in federal waters. BOEM will hold a competitive auction for an area offshore Maryland on Aug.19, 2014, and expects to hold additional competitive auctions for wind energy areas offshore Massachusetts and New Jersey in the coming year.

“Today is a significant step forward in facilitating the responsible development of renewable, clean energy offshore the United States and a true testament to the dedication of the North Carolina Intergovernmental Renewable Energy Task Force to ensure that we are moving forward in a safe and smart manner,” said BOEM Acting Director Walter Cruickshank.

Each of the three Wind Energy Areas has been designed to make available areas that are attractive for commercial offshore wind development, while also protecting important viewsheds, sensitive habitats and resources and minimizing space use conflicts with activities such as military operations, shipping and fishing.

BOEM worked closely with the United States Coast Guard to ensure that development in the identified areas would not pose significant risks to navigational safety. BOEM also worked with the National Park Service to address concerns regarding potential visual impacts to the Cape Hatteras National Seashore and the Bodie Island Lighthouse. As a result, BOEM refined the areas originally considered for commercial wind energy development during the process of defining the Wind Energy Areas.

Before any leases are offered for competitive auction, BOEM will complete an Environmental Assessment to determine potential impacts associated with issuing leases and approving site assessment activities in the Wind Energy Areas, in accordance with the National Environmental Policy Act.

BOEM is only considering the issuance of leases and approval of site assessment plans at this time. If leases are issued, any proposal for a commercial wind energy facility will require a construction and operations plan and a site-specific environmental analysis.  

— U.S. Department of the Interior, Bureau of Ocean Energy Management
 

Fishermen’s Energy Signs Department Of Energy Grant

0

At the end of Steel Pier, with the ocean as a backdrop, Fishermen’s Energy, U.S. Senator Robert Menendez, State Senator Jim Whelan, Atlantic City Mayor Don Guardian, Jose Zayas, U.S. Department of Energy Director of the Wind and Water Power Technologies Office, and numerous officials, memorialized the $46.7 million of grant funding over four years to accelerate the commercialization of innovative offshore wind technologies in the United States. 
 
This funding will supplement the investment by Fishermen’s Energy principals to finalize construction planning, fabrication, and deployment to achieve commercial operation by 2016, of a demonstration wind farm of five turbines 2.8 miles off of Atlantic City, potentially the first offshore wind farm in America. 
 
“Clean, responsible energy development projects like this bring good – paying jobs to our state and help us modernize New Jersey’s economy,” said Senator Robert Menendez. “We must continue looking into innovative energy options — like clean wind and solar projects — that can one day become the next energy giant and can reinvigorate our workforce in the 21st century global economy.”    

“Projects like Fishermen’s Atlantic City wind farm and the other projects sponsored by the Department of Energy are a first step in the direction of a building a robust sustainable energy infrastructure,” said Chris Wissemann, Fishermen’s Energy CEO. “The support provided by Congress, specifically the NJ delegation, and the Department of Energy is critical to bringing offshore wind to the United States. Our goal here in Atlantic City is to build a commercially operational wind farm that demonstrates job creation and specifically to show that these types of projects create benefits that far exceed their costs,” Wissemann continued. 
 
Fishermen’s Energy has all Federal and State permits necessary for construction of the first demonstration offshore wind farm to be built in the US, making the Atlantic City resort the birthplace of offshore wind in the Americas. Construction in Atlantic City is planned to commence onshore in 2015 with offshore construction and commissioning by Fishermen’s of the first grid connected US offshore wind farm in 2016.   

In 2012, DOE announced the start of an initiative to capture the potential of wind energy off American coasts. As part of a planned six-year $180 million initiative, these offshore wind projects will accelerate the deployment of breakthrough wind power technologies that will help diversify our nation’s energy portfolio, promote economic development, and launch a new industry here in America.

— Source: Fisherman’s Energy

Juhl Energy Acquires Two Wind Farms In Iowa

0

Juhl Energy, Inc. has announced that the company has completed its previously announced acquisition of two operating wind farms in Iowa. The $4 million acquisition closed on August 11, and the wind projects are now wholly-owned by Juhl Energy.

The two GE XLE 1.62 MW wind turbines are located in North Central Iowa near the towns of Manley and Kensett. The wind turbines are installed on private farmland approximately 10 miles apart from each other and have been commercially operating since 2011.

“This transaction underscores our ongoing commitment to building our residual, independent power production business made up of wind farms today and other forms of renewable energy in the future,” stated John Mitola, President of Juhl Energy. “We believe that building our asset ownership and operating division, with its predictable revenue and cash flow, is the foundation for the ongoing strength of our company. These two Iowa projects are representative of the hundreds of projects under 50 MWs — the market sector where Juhl stands head and shoulders above others in its ability to own, operate and maintain such assets.”

“The Iowa projects are being acquired with bank financing and our Juhl Renewable Asset, Inc. preferred stock,” continued Mitola. “Currently our JRAI Preferred stock is only available to accredited investors who have an existing relationship with the company.”

— Source: Juhl Energy, Inc.
 

Vestas, EP Global Expand Wind For Prosperity Into Africa

0

Vestas and EP Global Energy have been working since March on developing a donor-funded wind farm in Jordan to help the country address its growing energy challenges, which are being exacerbated by the influx of refugees as a result of the ongoing conflict in Syria. The burdened communities will benefit from the clean, reliable, and locally produced electricity provided by the project to meet the power needs of local consumers. The project is expected to be completed during 2015.

With the signing of the expanded MOU EP Global Energy becomes an official Wind for Prosperity Development Partner for the African continent.  Vestas and EPGE will collaborate to deploy wind-diesel hybrid systems to help improve access to electricity for communities that currently have no or only limited energy infrastructure within Africa and the Middle East.  

According to Efthyvoulos Paraskevaides, chairman of EPGE, “We are delighted with our expanded alliance with Vestas, to become an official Wind for Prosperity Development Partner within Africa and to further solidify our collaboration with Vestas in our other developments with our focus countries of EMEA. 

Bringing clean, cost-effective, and locally produced electricity to those communities that need it most is among our highest priorities, and we look forward to working with Vestas to bring multiple projects to fruition.  We are focused on jointly delivering our donor project for Jordan as a first priority, and to progress our efforts in Africa in parallel.”

Morten Albæk, Vestas Group Senior Vice President & CMO, concludes, “This agreement is another important milestone — especially for Jordan, which is facing growing challenges in providing clean, affordable, and reliable power.  Our partnership with EP Global Energy continues to expand, and look forward to establishing Wind for Prosperity projects in other markets.”

The Memorandum of Understanding signed on August 5 expands on the MOU the parties signed in March and further solidifies the collaboration between Vestas and EP Global Energy, which also includes the 117 MW Al Tafila project in Jordan, announced in December 2013.

— Source: Vestas
 

Study: Price Of Wind In The U.S. At All-Time Low

0

Wind energy pricing is at an all-time low, according to a new report released by the U.S. Department of Energy and prepared by Lawrence Berkeley National Laboratory (Berkeley Lab). The prices offered by wind projects to utility purchasers averaged just $25/MWh for projects negotiating contracts in 2013, spurring demand for wind energy.

“Wind energy prices — particularly in the central United States — are at an all-time low, with utilities selecting wind as the low cost option,” Berkeley Lab Staff Scientist Ryan Wiser said. “This is especially notable because, enabled by technology advancements, wind projects have increasingly been built in lower wind speed areas.”

Key findings from the U.S. Department of Energy’s latest “Wind Technologies Market Report” include:
 
• Wind is a credible source of new generation in the United States. Though wind power additions slowed in 2013, with just 1.1 GW added, wind power has comprised 33 percent of all new U.S. electric capacity additions since 2007. Wind power currently contributes more than 4 percent of the nation’s electricity supply, more than 12 percent of total electricity generation in nine states, and more than 25 percent in two states.
• Turbine scaling is boosting wind project performance. Since 1998-99, the average nameplate capacity of wind turbines installed in the United States has increased by 162 percent (to 1.87 MW in 2013), the average turbine hub height has increased by 45 percent (to 80 meters), and the average rotor diameter has increased by 103 percent (to 97 meters).  This substantial scaling has enabled wind project developers to economically build projects in lower wind-speed sites, and is driving capacity factors higher for projects located in given wind resource regimes. Moreover, turbines originally designed for lower wind speeds are now regularly employed in higher wind speed sites, further boosting expected capacity factors.
• Low wind turbine pricing continues to push down installed project costs.  Wind turbine prices have fallen 20 to 40 percent from their highs back in 2008, and these declines are pushing project-level costs down.  Based on the small sample of 2013 wind projects, installed costs averaged $1,630/kW last year, down more than $600/kW from the apparent peak in 2009 and 2010.  Among a larger sample of projects currently under construction, average costs are $1,750/kW.
• Wind energy prices have reached all-time lows, improving the relative competitiveness of wind. Lower wind turbine prices and installed project costs, along with improvements in expected capacity factors, are enabling aggressive wind power pricing.  After topping out at nearly $70/MWh in 2009, the average levelized long-term price from wind power sales agreements signed in 2013 fell to around $25/MWh.  This level is lower than the previous lows set back in the 2000-2005 period, which is notable given that wind projects have increasingly been sited in lower wind-speed areas.  Wind energy prices are generally lowest in the central portion of the country. The continued decline in average wind prices, along with a bit of a rebound in wholesale power prices, put wind back at the bottom of the range of nationwide wholesale power prices in 2013.  Wind energy contracts executed in 2013 also compare very favorably to a range of projections of the fuel costs of gas-fired generation extending out through 2040.
• The manufacturing supply chain has experienced substantial growing pains in recent years, but a growing percentage of the equipment used in U.S. wind projects has been sourced domestically since 2006-2007. The profitability of turbine suppliers rebounded in 2013, after a number of years in decline. Five of the 10 turbine suppliers with the largest share of the U.S. market have one or more manufacturing facilities in the United States. Nonetheless, more domestic wind manufacturing facilities closed in 2013 than opened. Additionally, the entire wind energy sector employed 50,500 full-time workers in the United States at the end of 2013, a deep reduction from the 80,700 jobs reported for 2012. Despite these challenges, trade data show that a decreasing percentage of the equipment used in wind projects has been imported, when focusing on selected trade categories. When presented as a fraction of total equipment-related wind turbine costs, the combined import share of selected wind equipment tracked by trade codes (i.e., blades, towers, generators, gearboxes, and wind-powered generating sets) is estimated to have declined from nearly 80 percent in 2006–2007 to approximately 30 percent in 2012-2013; the overall import fraction is higher when considering equipment not tracked in wind-specific trade codes. Domestic content has increased and is high for blades, towers, and nacelle assembly; domestic content is considerably lower for much of the equipment internal to the nacelle.
• Looking ahead, projections are for solid growth in 2014 and 2015, with uncertain prospects in 2016 and beyond.  The availability of federal incentives for wind projects that began construction at the end of 2013 has helped restart the domestic market, with significant new builds anticipated in 2014 and 2015. However, as noted by Mark Bolinger, Research Scientist at Berkeley Lab, “Projections for 2016 and beyond are much less certain. Despite the attractive price of wind energy, federal policy uncertainty — in concert with continued low natural gas prices and modest electricity demand growth — may put a damper on medium-term market growth.”

— Source: U.S.
Department of Energy
 

GE To Invest In Atria Power’s Wind Farms In India

0

GE Energy Financial Services has invested equity in three Atria Power wind projects under construction in India, supporting GE’s commitment to invest USD $1 billion annually in renewable energy projects worldwide. The wind farms will have a combined capacity of 126 megawatts and will support the Indian Ministry of New and Renewable Energy’s program to generate competitively priced grid-interactive wind power through feed-in tariffs. Financial details were not disclosed.

Located in Ananthapur district of Andhra Pradesh, the 25.6-megawatt first project is expected to reach commercial operations in September. The two other projects, each 50 megawatts, are located in Betul district of Madhya Pradesh, and are expected to reach commercial operations in December and June 2015 respectively. Off-take arrangements for the projects have not yet been finalized.

The projects will use GE 1.6-87.5 wind turbines, serviced by GE under an operations and maintenance agreement, to generate 76 megawatts of the total capacity. Additional turbines will be supplied and serviced by another manufacturer to generate 50 megawatts. Atria Power is managing construction and operations.

“GE’s global experience, financial structuring capabilities and commitment to advanced technology complements our strategy to develop low-cost renewable energy projects with maximum energy output,” said Sunder Raju, Director at Atria Power.

Raghuveer Kurada, business leader for India and South East Asia at GE Energy Financial Services, added, “Partnering with Atria Power, a strong and accomplished regional energy player, accelerates our global growth and India wind portfolio.”

— Source: GE
 

DOE Boosts Distributed Wind Manufacturing Funding Through Competitiveness Project

0

The Energy Department and the Department’s National Renewable Energy Laboratory recently announced funding for projects led by Pika Energy, Northern Power Systems, Endurance Wind Power, and Urban Green Energy that will help drive down the cost of small and medium-sized wind energy systems. Through the second round of the Competitiveness Improvement Project (CIP), the teams will receive a total of $1.27 million between them. In support of the Energy Department’s Clean Energy Manufacturing Initiative, this funding aims to help U.S. manufacturers improve their turbine designs and manufacturing processes to reduce hardware costs, improve efficiency and eventually earn certification from accredited third-party certification bodies, which issue easy-to-understand labels showing a turbine has met performance and safety testing requirements set by the wind industry.

Comprising more than two-thirds of all wind turbines installed in the United States in the last decade, distributed wind energy systems provide clean, renewable energy to consumers and reduce their energy bills. Distributed wind systems are typically installed on residential, agricultural, commercial, industrial, or community sites, and can range in size from 5 kilowatts (kW) to multiple megawatts depending on their application. While these wind systems vary widely in size, the CIP focuses on small and medium-sized turbines up to 250 kW in rated capacity.  Here are the projects announced for funding:

• Pika Energy of Westbrook, Maine, will improve the performance of their existing components and manufacturing process. Pika will scale up their existing turbine components to roughly twice their current size to produce a turbine capable of producing more energy at a reduced end-user cost. Pika will also implement the use of an injection molding technique for manufacturing in order to produce lighter and stronger components.
• Northern Power Systems of Barre, Vermont, will develop and deploy an innovative blade designed for low wind speed applications. Northern Power Systems will also model and test an advanced control method that will help increase the amount of energy produced by their turbine.
• Endurance Wind Power of Spanish Forks, Utah, will test the prototype of their expanded rotor that allows for a larger wind-sweep area, leading to a more efficient turbine.
• Urban Green Energy of New York City, New York, will test their vertical axis wind turbine against the American Wind Energy Association’s Small Wind Turbine Performance and Safety Standard. The standard was created by the small wind turbine industry, scientists, state officials, and consumers to provide consumers with realistic and comparable performance ratings of competing products.

This second round of CIP awards builds on the success of the first round awarded in 2013, through which Bergey Windpower identified the component improvements necessary to optimize a turbine for increased performance and reduced end-user costs, while Pika Energy developed an advanced blade manufacturing process they plan to further improve in this second round.

— Source: U.S. Department of Energy
 

Hoosier Energy Signs PPA With EDP Renewables

0

Hoosier Energy has entered into a 15-year power purchase agreement with EDP Renewables North America that will add 25 MW of wind energy from an Illinois wind farm beginning in December.

The wind power agreement is for 25 MW from the Rail Splitter Wind Farm located roughly 25 miles west of Bloomington, Illinois. The Rail Splitter project has been in operation since 2009 with installed capacity of about 100 MW.

“Hoosier Energy is focused on providing cost-effective renewable energy for our member systems,” said Steve Smith, Hoosier Energy president and chief executive officer. “Our agreement with EDP Renewables adds more wind resources to our portfolio, which already includes wind, hydro, landfill methane and coalbed methane generation.”

The purchase agreement will provide approximately 74,000 megawatt-hours of energy annually to Hoosier Energy’s cooperative member systems and their consumers in southern Indiana and southeastern Illinois.

Hoosier Energy will also earn Renewable Energy credits (RECs) for the wind power. RECs certify the environmental attributes of renewable energy production.

“We are excited about this opportunity for partnership with EDP Renewables,” said Heath Norrick, Hoosier Energy renewable energy manager. “The Rail Splitter Wind Farm is a proven Midwest provider of renewable energy that will provide benefits for our members.”

Avoiding An Ill Wind

0

After a lackluster 2013 for wind power development, the wind market is once again growing. According to a Bloomberg New Energy Finance report, installations this year could reach 6.5 GW and grow to 8.5 GW in 2015. As wind development continues on its upturn, the focus is moving from “whether” to invest in wind power to “how” to make sure projects succeed.

This is no small issue. The development of wind projects — whether a single turbine or larger wind farms — are huge undertakings. They require substantial equipment and complex infrastructure to support and operate that equipment.

One of the most important infrastructure elements, yet one that is virtually invisible, is site preparation. Large-scale energy projects aren’t typically developed on pristine, undeveloped land. Rather, they are often located on brownfields or other sites that have previously been used for industrial or other functions, and which have been abandoned or deemed unsafe for traditional usage. But even though wind projects are often located on discarded land, that land is essential to the success of any project. It needs to undergo strict mitigation to assure that the energy-producing equipment can operate safely, and the structural integrity of the soil needs to be established so it can support the heavy equipment that’s necessary to provide wind power.

What’s located below ground is just as important as what’s located above. Therefore, it is essential for a project’s environmental team to be actively involved from a wind project’s earliest days.

Most sites retain historic relics from the past. For the typical brownfield site, which may have seen any number of previous industrial uses, that could mean presenting a smorgasbord of different types of processed waste, metals, petroleum byproducts, and chemical contaminants. So, the essential first step in developing a site for wind development is to conduct a comprehensive environmental investigation to determine what contaminants are present and provide the necessary information for creating a successful mitigation plan.  Some of the contaminants can require significant interaction with regulatory authorities in order to properly handle and dispose of the impacted material.  For instance, if the subsurface material includes polychlorinated biphenyls (PCBs), there could be requirements to obtain both State and Federal (EPA) approvals while characterizing the site, and before the material is disposed.  Depending on the concentration of PCBs, environmental samples containing PCBs detected at concentrations >50 mg/kg (or at any concentration if not authorized for use under 40CFR §761.61) would be subject to the Toxic Substances Control Act (TSCA), and the site would be regulated for both cleanup and disposal under §761.61.   Cleanup activities may require notification to the EPA and the State regulatory authorities and depending on the site history and conditions, EPA may authorize more practical sampling, clean-up, or disposal procedures that are not prescribed in the regulations.

In addition, if there is subsurface material encountered that contains asbestos containing material (ACM), there may be requirements to prepare and obtain approval for an Asbestos Abatement Work Plan.  The plan must comply with the Environmental Protection Agency’s (EPA) National Emissions Standards for Hazardous Air Pollutants (NESHAPs) regulations.  Personnel that are hired to perform this work must be have specific state licenses to prepare work plans, perform construction administration, conduct project monitoring and inspections.

These additional regulatory activities may also require that public notice be provided to area stakeholders prior to construction and regulatory approval.  When performing construction on impaired property, the public notice activities and regulatory approval process can take from as little as a few weeks to several months.   This should be factored into the overall permitting and construction schedule to avoid any surprises.

While there are certainly contaminants, such as radioactive waste, that will pose immediate and continuous health risks if left in place, more often than not, contaminants can be safely capped and left onsite. Capping involves containing contaminated soil within retaining walls and placing it upon an impervious liner cap. The contaminated soil is then covered with an additional two to four feet of clean soil. Using the capping approach rather than removing and disposing of contaminated soil can cut remediation costs by as much as 75%, so it’s easy to see why private and public developers would prefer to go this route.

When creating a turbine foundation and assuring the integrity of the cap, it’s not enough to merely consider the weight of the piles that will support the turbine and the depth to which they will be driven. The piles and turbines are enormous and they require very large equipment to transport and install them. The cap and site foundation need to be designed to withstand the rigors of installation, as well as the day-to-day operations once the turbines are up and running.  This is particularly important when building on historic urban fill.  Urban fill almost always is a mixture of heterogeneous materials, making it very difficult to design the foundation.  This has generally required making a unique site-specific manufactured fill by mechanically screening out unwanted material and mixing with imported material to create a satisfactory fill material suitable for development.    This often means implementing construction controls to prevent excessive equipment loads from trucks, cranes, and other installation equipment. A cribbing system can also be implemented to distribute the weight of construction equipment.

The threat of erosion is also a key consideration, both during construction and when the turbines are operational. If the land on which the wind technology is installed suffers erosion, brownfield contaminants can escape the site and infiltrate adjacent land. At the same time, erosion can undermine the structural integrity of the wind equipment itself. The potential threat of erosion to the structure can’t be overstated. Wind turbines are large structures that require considerable sub-surface supports. It is essential to create an environment beneath the turbines that is safe and stable. Therefore, erosion and sedimentation control plans are key elements of any development. This typically includes the installation of silt fencing, haybale protection around groundwater extraction wells, and catch basin inlet filters to catch and contain storm runoff when it rains.

Additional protection can be offered through the installation of a subsurface stormwater detention system, which can temporarily store stormwater from the site and manage its infiltration into the site. Stormwater mitigation is particularly important in this era of climate change because major storms are becoming severe and frequent.

With the turbine revolution once more gaining steam, developers of wind power projects need to be aware of all of the infrastructure challenges they are likely to face. Some of the most serious issues will be found below ground, and at first glance, will be undetectable. That’s why a project’s environmental team should be involved from the very beginning of the planning stage and to the project’s completion. By including environmental pros who can identify contaminants and other risks, and create plans to address them, wind power developers can save themselves numerous headaches — as well as a lot of money.  
 

Record Project Development Spurred By Production Tax Credit And Other Market Factors

0
The wind energy project pace set late last year continues — and then some.
 
That’s the story told by AWEA’s latest quarterly industry market report, which reveals continued strong under-construction numbers headed into the second half of the year. Second quarter numbers reveal a record number of projects currently under construction, as the wind industry ramps up to capitalize on the 2013 Production Tax Credit (PTC) extension. 
 
Currently over 14,000 megawatts of wind energy are under construction in the U.S. across more than 100 projects and 21 states. The bulk of the activity is happening in the wind-rich regions — from North Dakota and Minnesota, down through Kansas, Oklahoma and Texas.
 
Technology Taps Wind-Rich Regions
In those regions, technological innovations including larger rotor diameters and improved control systems and gearboxes have allowed developers to offer historically low power purchase agreement (PPA) prices. One notable difference on the technology front: Whereas several years ago turbine designers pushed to develop turbines with higher capacity ratings, today’s turbine technology focuses more on higher capacity factors. The outcome: Preliminary data from the Department of Energy reveals an average 2013 wind PPA price of $25/MWh focused around the nation’s interior region, cheaper than at any time before.
 
As result, utilities, eager to take advantage of these historically low prices brought on by technological advancements and coupled with the extension of the PTC, have signed more than 9,000 MW of long-term contracts in 2013-14. These contracts have been touted for their economic benefits: consumer savings delivered over the life of the project, all while offering long-term hedges against fuel price volatility and future carbon regulations. 
 
Stuart Solomon, president and COO of Public Service Company of Oklahoma (PSO) recently described his company’s purchase of nearly 600 MW of wind power as “extraordinary pricing opportunities that will provide substantial savings for our customers.” Solomon knows what he’s talking about: PSO’s contracts will reduce customer costs by $53 million in the first year alone, with annual savings growing over the 20-year contract life. 
 
These projects are also being built in some of the regions hardest hit by recent and ongoing drought. As wind power uses no water for electricity generation, its water-saving attributes are hugely attractive to utilities and jurisdictions.
 
Other Factors Converge
Other factors are also allowing companies to focus on what they do best — build wind farms. The IRS’s recent guidance on the physical work test, project ownership transfers and safe harbor provisions adds additional clarity for wind projects going forward. 
 
Meanwhile, still another factor driving the current construction boom is at play. Corporate purchasers are investing in new wind generation. 2014 has seen new PPAs announced by Microsoft, for electricity coming from an Illinois wind farm, and Walmart, for power provided by a Texas facility. This year also has brought agreements between Google and Facebook for wind power from MidAmerican Energy’s Wind VIII project in Iowa, IKEA’s purchase of an Illinois wind project and the Mars Corporations’ investment in a Texas project. 
 
This activity is driven by corporations’ internal sustainability goals, but also by the opportunity to save on energy bills — highlighting how wind power is both good for the environment and good for these businesses bottom lines. Even behind the meter, on-site generation is on the rise, with utility-scale turbines under development at a military base, a brewery, and a produce processing plant.
 
Texas Still Unrivaled 
Perhaps the greatest driver of this construction boom is the completion of the Competitive Renewable Energy Zone (CREZ) transmission lines in Texas. Recognizing that projects wouldn’t get built without transmission, and that transmission providers wouldn’t build lines without generators, the proactive transmission planning and broad cost allocation that took place under Texas’s CREZ initiative is ensuring that the state will remain a world leader in wind power. 
 
Texas has led the nation in installed with capacity since 2006. That will continue. At the end of the second quarter, more than 8,000 MW were under construction across the state, in both the Southwest Power Pool (SPP) and the Electric Reliability Council of Texas (ERCOT). In short, more wind is now under construction in Texas than is currently installed in any other state. More than 7,300 MW have interconnection agreements with ERCOT for 2014-2015 alone. 
 
In addition to the 14,600 MW under construction, the U.S. wind industry currently has an installed capacity of 61,946 MW, with utility-scale projects located in 39 states plus Puerto Rico. It is now up to Congress to continue the incentive for private investment in new wind farms so that the wind industry can continue providing clean, homegrown energy to American consumers.  
 
For more information on the Second Quarter Market Report, please visit www.awea.org/2Q2014
 

EDF EN Canada Aligns With McLeod Lake Indian Band For Three Possible Wind Farms In British Columbia

0
Representatives from EDF EN Canada Inc., a subsidiary of EDF Energies Nouvelles, and McLeod Lake Indian Band (MLIB) today jointly signed a Memorandum of Understanding (MOU) during a ceremony conducted at the McLeod Lake Indian Band Annual Meeting. The MOU concerns the potential development of three wind energy projects representing over 500 megawatts (MW) of clean power in the Peace River Region of British Columbia.
 
“We are extremely pleased to have entered into this MOU with McLeod Lake Indian Band,” commented Cory Basil, Vice President of Development at EDF EN Canada. “The MOU reinforces our relationship and commitment to meaningful engagement and consultation. We will continue to work together, respectfully and collaboratively, with MLIB on projects which will bring economic benefits and opportunities to the Band and the Peace River Region.”
 
McLeod Lake Indian Band Chief Derek Orr said, “The McLeod Lake Indian Band supports EDF EN Canada in the responsible development of sustainable, non-polluting and environmentally sensitive wind energy in the Peace Region. We look forward to a long and mutually beneficial relationship with EDF EN Canada and the addition of more wind power in our region.”
 
The three projects represented in the MOU are the Sundance Wind Project, Taylor Wind Project and Wartenbe Wind Project. Both Taylor and Sundance projects are undergoing a BC Environmental Assessment. The projects could deliver power as early as 2017 subject to clearing the environmental assessment process and securing power off-take agreements from BC Hydro. The Wartenbe project is construction ready, having previously received its BC Environmental Assessment Certificate.
 
— Source: EDF EN Canada

Profile: Chokecherry and Sierra Madre Wind Energy Project — Carbon County, Wyoming

0
As the U.S. wind energy industry continues to champion the cause of carbon reduction in energy generation, the largest proposed wind farm in the country — ironically to be situated in a community named Carbon — is pushing forward through the development process. 
 
The Chokecherry and Sierra Madre Wind Energy Project, located just south of the cities of Sinclair and Rawlins in Carbon County, Wyoming, is expected to be comprised of up to 1,000 wind turbines, amassing a total nameplate capacity of 3,000 MW. 
 
The project, first proposed in 2006, is being developed by Power Company of Wyoming, LLC, a wholly owned affiliate of The Anschutz Corporation.
 
The wind project will be constructed in two phases on 320,000 acres of land, ownership of which is split equally between the federal government and private parties.
 
Upon completion, the Chokecherry and Sierra Madre project will generate enough electricity to power 1,000,000 average homes, and will effectively reduce carbon emissions an estimated 7 million to 11 million tons annually. 
 
The fact that the project is being built to a large degree on federal lands will make a significant contrubution toward achieving the goal of 10,000 MW of renewable energy generation on federal land by 2015, as outlined in the 2005 Energy Policy Act. Sidebar
 
As many as 1,000 jobs are expected to be created during the project’s construction phase. When complete, the project will employ 114 permanent workers in operations and maintenance functions.
 
The Chokecherry and Sierra Madre project is expected to result in $300 million in property tax revenue in the first 20 years of operation, as well as $232 million in sales tax revenue and $150 million in Wind Electricity Tax, paid to the State of Wyoming.
 
Eight years into its development, the project is currently in the process of completing regulatory reviews and permitting prior to the start of construction. 
 
“There are more complexities and costs related to permitting a project on federal land than on private land, and it typically takes more time,” said Kara Choquette, communications director for Power Company of Wyoming, regarding the development timeline of the project. Timeline
 
“The project has received its key Carbon County permit, its key State of Wyoming environmental and siting permit, and a Record of Decision from the BLM/Department of the Interior approving the site for wind energy development subject to a second-level review of the site-specific plans of development,” Choquette said. “That second-level review is anticipated to be completed by BLM by the end of 2014.”
 
Power Company of Wyoming estimates the total project cost at $5 billion. The company has spent more than $45 million thus far in the early development stages of siting and permitting.
 
 Public support on all levels, from national to local, has been positive about the project, Choquette said. In fact, during a two-day permitting hearing in August, no one commented in oppopsition of the project. 
 
For more information on the Chokecherry and Sierra Madre Wind Energy Project, visit the Power Company of Wyoming’s website at www.powercompanyofwyoming.com.  

Conversation with Rob Morgan

0
Could you tell us a little about the history of RES Americas? 
RES Americas has been active in North America since 1997, with a renewable energy and storage construction portfolio of over 7,000 MW in operation.  Roughly half of that portfolio has been developed by RES Americas with the other half built for third parties.  RES Americas is a subsidiary of RES Ltd., founded in 1982 and headquartered in the UK.
What services and solutions does RES Americas offer to the wind energy industry?
RES Americas has a robust suite of in-house expertise and services that we offer to the wind energy industry, including resource assessment and early project development support, permitting/interconnection and late development support, engineering, procurement and construction, and operations.  RES Americas is distinguished by our dedicated staff of professionals throughout the value chain.
What types of clients does the company serve? Could you briefly describe what you do for those types of clients?
RES Americas has a diverse client base.  We have historically developed and constructed projects with an eye toward third-party ownership where the power production is contracted under a PPA with a utility counterparty.  We have also constructed projects developed by third parties and owned long term by those third parties. More recently, we are constructing projects for ownership directly by a utility, and we are supplying power under PPA to non-traditional buyers —companies with a nationwide footprint that are managing their carbon footprint.
RES Americas places a strong emphasis on sustainability. Can you go into a little detail about how that factors in to the company’s operations?
RES Americas is a value-based organization and sustainability is a core value of the company.  We are working on diverting an increasing percentage of our waste stream to recycling, composting, and re-use. Also, we encourage a reduced environmental impact by all our people through sustainable work/life choices such as participating in Bike to Work Day and the Green Car Incentive Program.   Going beyond our company, we are working with our supply chain to create demand for sustainable products and practices.
Walk our readers through the process RES Americas takes in wind project development.
Project development is a process that requires patience and problem solving.  From years of experience, RES Americas has broken that process down into the following steps:
  • Identify areas with promising wind or solar resources, compatible land uses, and access to transmission lines
  • Identify and map prospective sites
  • Establish and maintain strong relationships with landowners and negotiate wind or solar measurement agreements and/or land leases
  • Establish and maintain strong relationships with local stakeholders, including local government, environmental groups, and community groups among others
  • Commence project planning, design and engineering using RES Americas’ engineering team
  • Conduct environmental assessments and studies
  • Begin the permitting process
  • Discuss and negotiate offtake agreements with local utilities
  • Secure interconnection and transmission agreements
  • Secure financing for project construction
  • Construct the project using RES Americas’ construction team
  • Commence operations

How is that process unique? What sets it apart from competitors?

Our knowledge of development, engineering, and construction is different from our competitors, who typically are active on only one part of the value chain.  Our presence across the value chain allows us to deeply understand project risks and mitigate those risks for the project owner.
RES is built on a long legacy of construction services. How does that translate to wind farm projects and benefit wind customers?
Having an extensive knowledge of the construction industry and risks involved in construction allows us to manage and mitigate those risks for the benefit of project owners and to the ultimate benefit of the entire industry.  RES Americas has a very high regard for safety on its job sites and in our everyday work. In fact [at time of print], we have over a million man-hours without a recordable safety incident throughout the company.   Construction can be a demanding and risky business, but with the proper training and attention to site-specific risks, we can make it a safe and fulfilling business.
How does the company view the future of wind energy, both near and long-term?
We are extremely busy in 2014 & 2015, with over 1 GW of wind, solar and storage projects in construction or planned.  We are bullish long term as the cost of renewable resources hits grid parity without any price volatility that is inherent in the fossil fuel markets.  Across the spectrum of wind, solar and storage, manufacturers are making efficiency and cost improvements – all of which show up in an improved, lower price of electricity paid by consumers.
What other industries does RES Americas serve? With regard to energy projects, are there any efforts toward cogeneration plants, etc.?
RES Americas is pursuing energy projects that have a renewable fuel supply (or are non-polluting such as storage and transmission) so to the extent we go beyond wind, solar, storage and transmission, it will involve some other renewable fuel stream such as biogas.  Cogeneration is a very efficient process that captures waste heat for beneficial use, so renewable cogeneration would be an interesting combination.

Gamesa Concludes Turnkey Construction Of Its First Wind Farm In Chile

0
Gamesa has concluded turnkey construction of its first wind farm in Chile — the 36 MW San Pedro Chiloé wind farm — for the local company Transantartic. The project is located on Chiloé Island, in the southern part of the country. 
 
The successful commissioning of its first project in Chile marks the establishment of Gamesa’s commercial presence in a wind market with great potential; according to the most recent wind report by Navigant’s BTM Consult, Chile had 413 MW cumulative installed by the end of 2013 and, supported by high energy demand, is expected to reach 1.5 gigawatts cumulative installed by 2018. 
 
The wind farm features 18 Gamesa G90-2.0 MW wind turbines. Construction for the project began in January 2013 and included the development of all necessary civil works and infrastructure for the project, including more than 20 kilometers of roadway, an electrical substation, a 25-kilometer high-voltage transmission line and a bridge. As part of the project, Gamesa will provide comprehensive Operations and Maintenance (O&M) services for the wind farm for a period of 12 years.
 
— Source: Gamesa
 

Nordex To Build 37.5 MW Orla Wind Farm In Poland

0
Wind turbine manufacturer Nordex has been awarded a contract for the delivery and installation of nine turbines from its N100/2500 series. This constitutes the first construction phase of the 37.5 MW “Orla” wind farm, which will comprise a total of 15 N100/2500 wind turbines as cold climate version. The turbines which have now been ordered are to go into operation as early as in December 2014, with the other six to follow by mid next year.
 
The Orla project was initiated in 2008 and developed since by the project development arm of Nordex. “This is going to be the first realization from our pipeline of own developed projects in Poland. It is a good illustration of how Nordex can provide more value to the market with quality projects,” said Lars Bondo Krogsgaard, a member of Nordex SE’s Management Board.
 
The client is the project company “C&C Wind” owned by international private-equity investors and an independent power producer. The project finance has largely been provided by the European Bank for Reconstruction and Development (EBRD).
 
Located in the eastern part of Poland, the wind farm is to generate an annual energy yield of up to 100 GWh, resulting in a capacity factor of an above-average 33 percent. At the same time, it will avoid emissions of around 57,000 tons of carbon dioxide, which would otherwise arise from thermal power stations. Under the targets set by the European Union, Poland has undertaken to roughly double the proportion of renewable energies in its national energy balance to 20 percent by 2021.
 
— Source: Nordex
 

Technological Advances To Take Center Stage This Month At WindEnergy Hamburg

0
This month, the international wind energy industry will gather at the WindEnergy Hamburg fair. More than 1,000 companies hailing from over 30 different countries will be present at the leading international wind energy industry fair to showcase their latest products, service offerings and projects for both onshore and offshore wind power. For four days, eight halls at the Hamburg fair site will provide exhibitors and industry visitors with an opportunity to get the full picture of all the latest technologies from every segment of the value chain. This is a selective preview of some of the innovations and developments from the wind energy world, which have been announced for the leading global industry fair at the ‘wind capital’ of Hamburg.
 
Developments In The Large Turbine Segment
MHI Vestas Offshore Wind, Gamesa with its Joint-Venture partner Areva, and the German engineering consultancy aerodyn (SCD) will all inform the visitors of WindEnergy Hamburg about the latest status of their product developments in the 8MW class. Unlike the quasi-standard three-blade upwind configuration, SCD’s offshore solution is a two-bladed downwind SCD 8.0 turbine installed on a floating base. A company spokesperson commented this approach: “Our overall turbine-and-floater concept offers specific benefits in terms of instant load reduction. We will reveal further details at WindEnergy Hamburg.” 
 
Floating wind turbine technology is evolving at a much faster pace than many had expected just a few years ago, and there is a broad variety of design concepts.  One innovative example is the GICON-SOF tension-leg platform. According to the engineering consultancy GICON, it is suitable for water depths from 20 up to 500 metres. A prototype project with a 2.3MW Siemens turbine is to be erected in the Baltic Sea by May 2015. According to the manufacturer the design is scalable to at least 6MW.
 
Component Suppliers On Track
A novelty in the 6MW class is Senvion’s 6.2M152 geared turbine with an enlarged rotor. A prototype is currently under construction.  Meanwhile major component suppliers are stepping up their efforts to match the latest supply chain demands ranging from blades to castings, drive trains, towers and support structures. VEM Sachsenwerk, likewise exhibiting at the leading industry fair in Hamburg, now offers both asynchronous and synchronous generators for power ratings up to 7MW. EEW Special Pipe Constructions has built one of the world’s first XL-type monopile towers with a 10-metre outer diameter. The tower can carry 6-7MW turbines with 150 metre and larger rotors, and be installed in water depths of up to 40 metres.
 
Mechanical drive train specialist Winergy (Siemens) has delivered two 3MW prototype units of its new medium-speed “HybridDrive” solution to German technology developer Wind-to-Energy (W2E). W2E will be represented at WindEnergy Hamburg, as well. Supplier FWT is marketing the product under license as its flagship model for IEC class II sites under the model name “FWT 3000.”
 
Innovative Gearboxes
Winergy will display a further (optional) product development of this semi-integrated drive system at WindEnergy Hamburg. It consists of a two-stage planetary gearbox with a flange-on permanent magnet generator design.  What makes this system unique is the use of journal or plain bearings in both gear stages with the exception of the planetary carriers which are fitted with conventional roller-type bearings. Equally new is the use of journal bearings for the generator. The HybridDrive displayed at the fair will be partly cut open so visitors can take a closer look at the internal components. Winergy will inform visitors about all the benefits of using journal bearings. Another product development by Winergy shown at WindEnergy Hamburg will be a 2MW, three-stage, high-speed gearbox likewise fitted with journal bearings. A prototype unit installed in a Vestas turbine has been field tested for over 16 months at a cold-climate site in Scandinavia. A complete journal bearing arrangement will be on display at the company booth.
 
Wikov MGI of the Czech Republic will exhibit its range of wind turbine gearboxes incorporating flexible pins and a differential split torque arrangement, which according to the supplier combine an increased torque rating with reduced size and mass characteristics.
 
Onshore Turbines From 3 To 5MW And Above
Several international exhibitors will inform WindEnergy Hamburg visitors about their latest 3MW+ class onshore turbines. One such product designed for IEC class III sites is Senvion’s 3.0M122 turbine. The first commercial units will be installed this year. Another new IEC III-type turbine model is the Nordex N131/3000 featuring a record 131-metre rotor diameter, the largest in its class.
 
Several suppliers have also announced new, higher rated onshore turbines in the 3.2 – 5MW range. Project developer and turbine supplier eno Energy will present its new eno 126 | 3.5MW model, and XEMC Darwind is developing a 4.5MW turbine for high-wind onshore sites. Earlier this year Enercon announced a new turbine model ranging between the current 3 – 7.5MW offerings.
 
U.S.-based AMSC Windtech develops and licenses turbine models up to 5.5MW to third-party clients. AMSC’s latest product development is a 2MW geared turbine model with a 113-metre rotor for IEC class III sites, available in a full converter solution with either a double-fed induction generator or a synchronous/asynchronous generator. Says Kerry Farell, senior manager of corporate communications: “Our newest design has one of the largest rotor diameters in the industry. The market is moving towards low wind areas. In low wind speed areas we are able to implement a much bigger rotor diameter, which is also enabled by advanced controls on basically the same wind turbine. This helps to increase the AEP while lowering the Cost of Energy for a variety of markets, from regions that are already saturated to new emerging regions with lower overall wind speeds.” Farell added that AMSC is working with a licensee to build a prototype and is looking for additional licensees.
 
Taller Towers, High-Precision Instruments
Several tower suppliers will showcase their latest product developments in Hamburg. For example, Germany’s Drössler Umwelttechnik will inform about its innovative prefabricated tower solution called Ventur for up to 120-metre hub heights in full concrete, and for 200-metre hub heights in concrete/steel hybrid versions.
 
Accurate wind measurements are another field of expertise receiving growing attention within the wind energy industry. WindEnergy exhibitor ROMO Wind will present an innovative, patented measuring and monitoring solution called iSPIN, consisting of three stationary ultrasonic devices without moving parts, mounted to a rotating spinner at 120-degree inner spacing. According to the manufacturer, this solution enables effective measurement of both the wind speed and wind direction, with much greater precision than nacelle-mounted systems.
 
Energy Storage Solutions
Storing renewable energy in a cost-effective, reliable and efficient manner is one of the remaining key challenges for a successful transition from fossil and nuclear-based power generation towards renewable energy sources such as wind. Enercon, GE, Siemens and other manufacturers will highlight their latest battery-based and other energy storage solutions at WindEnergy Hamburg, and inform visitors about specific benefits and challenges ahead.
 
WindEnergy Hamburg will be held September 23-26. Organizers expect more than 1,000 exhibitors from all parts of the world. The event will be held at the Hamburg Fair site every two years. In addition, the wind exhibition with a focus on the national market, HUSUM Wind, will be held in Husum from 15 to 18 September 2015, likewise organized jointly by HMC and Messe HUSUM, as a biennial event. 
 
For further information please visit windenergyhamburg.com and husumwind.com.  
 
— Source: WindEnergy Hamburg

Siemens D6 Turbine Obtains Type Certification By DNV GL

0
Siemens Energy has obtained type certification by certifying body DNV GL for the company’s innovative D6 offshore wind turbine. The model Siemens SWT-6.0-154 is equipped with a modern direct drive generator, rated at 6 MW and equipped with a 154-meter rotor. The official certificate is a further step in ramping up the serial production of the turbine. The certification process included DNV GL experts being given full access to the engineering and Siemens assembly facilities in Brande as well as testing facilities at Oesterild, Denmark and Hunterston, UK. Evaluation included an assessment on the maturity of the turbine design, its manufacturing, installation and commissioning processes and related documentation.
The development of the SWT-6.0-154 marks a significant step towards reducing the cost of energy. With a tower head mass of only 360 tons, the new 6-MW machine is around one third lighter than comparable systems. This weight advantage provides improved economic viability across all project phases, from assembly to transport, foundations and installation all the way up to operation. One SWT-6.0-154 turbine can supply up to 6,000 households with clean offshore wind power. This type certification for the SWT-6.0-154 includes a 25 year design lifetime, which is an additional five years compared to the previous turbine lifetime that Siemens has designed.

Beyond The Turbine: Understanding The Collector System

0
Once the wind has been converted to mechanical rotating energy and then to electrical energy, it leaves the turbine.  
 
For some of us, our job is over.  Some technicians don’t work on anything beyond the turbine.  For others, their responsibilities continue — or have just started — with still many components and miles of conductors to maintain.  This part of the wind farm is called the “collector system,” and without it, the wind farm doesn’t work.  
 
The collector system is comprised of many components. An important component of this system is the transformer. A transformer is an electrical component that has the ability to change high current, low voltage into high voltage, low current.  
 
Transformers are used everywhere in the wind turbine and what is discussed here for the power transformers is applicable elsewhere.  Transformers are electrical components that only work in alternating current (AC) systems.  
 
The transformer takes the relatively low-voltage, high current power from wind turbines and “transforms” it to high-voltage, relatively low current for transmission over long distances. Or, when the turbine is not producing, the transformer takes the high-voltage low current and transforms it into low-voltage, relatively higher current for the turbine to operate its various systems.  
 
In a transformer, the relationship between voltage and current are inversely proportionate.  For example, if voltage is increased by a factor of 10, the current is reduced by a factor of 10.  It is important to reduce the current for transmitting the energy for distance to reduce power or line loss. Line loss can happen just like when you try to use more than one long extension cord to run a power tool.  There are voltage drops due to the friction of the electrical current in the conductor.  On long distance power lines, if the voltage gets too low, then the voltage can be stepped up again by using another transformer.  
 
Maintaining these transformers is fairly easy. For pad-mount transformers, keep your services trucks from running into them and if you are in areas of ice, build protective shelters to keep falling ice from damaging them. Keep the doors closed, seal the conductor entries to keep out the rats, and regularly inspect for bad connections — safely.  
 
Checking for oil leaks and proper oil levels, as well as taking samples of the transformer oil can tell you if there are signs of internal problems. Hydrogen and acetylene are some of the gases found in the oil of transformers that are considered indicators of problems. 
 
The concentration threshold of these gases is up to interpretation of an experienced transformer engineer.  Some of today’s transformers have high hydrogen gas counts, but when the transformer is inspected, there is no visible problem found.  This is thought to be caused by certain manufacturing techniques beyond the scope of this article.  
 
When transformers go bad, they can go quiet, or they can go out with a bang.  A transformer explosion is extremely powerful and can cause significant damage.  Transformer explosions can be so powerful that some wind farm substations utilize special concrete blast walls to separate transformers from other components in the substation for protection.  
 
In the collector system, when the electrical current leaves the transformer, it continues to flow through high voltage conductors.  Sometimes the conductors are underground and sometimes they are above ground, or a mix of the two.  Both types have their advantages and disadvantages. 
 
For underground systems, the advantage is that there are no cables to look at so a better visual view.  A disadvantage is the cable is fairly expensive due to the insulation required to place the cable underground. Underground cable is connected together with specialty connectors. These connectors are typically called splices, and consist of conductor and insulator. It is just as important to properly treat the insulator as it is to connecting the conductor. High voltage electricity can destroy a high voltage electrical splice even if the conductor is well prepared but the insulation of the splice has not been prepared properly or treated well. Just a small nick in the insulation at the splice can cause a early failure.   
 
With above ground or overhead conductors we typically don’t have the same issue with insulation as air is used but issues with the power poles and animals can cause problems. Birds can build nest or cross conductors if the lines are not properly designed.  The conductor lines can swing in the strong winds and short between another. In addition, in an effort to save money during construction, we sometimes have power poles that are not properly sized or not spaced properly and become overloaded with weight and line tension causing all kinds of havoc with leaning or bent poles and overloaded pole to line insulator connections.  
 
These high voltage collector circuits, whether underground or overhead, feed power from the individual wind turbines and consolidate the power at a substation. At the substation the power is consolidated and usually transformed once again to a higher voltage and then sent out to the grid.  In the substation, there are a variety of protection devices that use current, voltage, thermal and magnetic sensors to ensure things are safe. In addition, there is lightning protection and a substantial grounding system. There are circuit breakers and switches to control the power flow.  Monitoring systems watch the power flow and the grid operator typically has control to operate or disengage the substation if something is awry.  
 
Hopefully this article has served as an introduction to the collector system, and raises some curiosity and discussion with your team. It is beneficial that everyone understands the specifics of the collector system used by your facility.
 
As always work as safely as possible, and work to prevent surprises.  

OFS Adds New Look, Increased Functionality To Website

0
OFS is recently announced the launch of its new website — www.ofsoptics.com — incorporating simpler navigation, a comprehensive product catalog and a fresh new look.
“We listened to our customers. We overhauled our website to enhance our customers’ internet experience and to make it easier to do business with OFS,” explained Michael Fortin, senior director of branding, content marketing, and communications for OFS.
The new website combines all the products, capabilities and published technical data offered by OFS. Customers will be able to navigate the site by product or by industry and application.The catalog is now fully searchable and will enable side-by-side comparisons of OFS products.
“We look forward to our customers’ comments as we roll out this new website. Our ultimate goal is to make every interaction with OFS a high-quality one. This new website will help,” Fortin concluded.