May 10, 2012-Beijing, China
Xinjiang Goldwind Science & Technology Co., Ltd. (“Goldwind”) recently celebrated a key milestone with the completion of the US Illinois-based Shady Oaks project, marking the installation of 6,582 units of Permanent Magnet Direct Drive (PMDD) turbines installed globally that represents 10 Gigawatts of installed capacity. Goldwind is the world’s largest and most experienced PMDD wind turbine manufacturer and has expanded its presence to over 20 provinces across China and over 10 nations across six continents.
PMDD turbines have enabled more cost efficient operation of wind farms due to the removal of what many in the industry consider beinga technological vulnerability: the gearbox. PMDD turbines have fewer moving parts and are designed to reduce the frequency of costly mechanical failures, increase the time that turbines are operational and further drive down the cost of wind power generation.
The global wind industry has gradually moved from geared turbines in favor of PMDD turbines in recent years. As an early adopter of the technology, Goldwind saw the benefits of PMDD turbines as a key offering in a competitive industry.
“Several years ago, Goldwind made a strategic decision to transition our entire fleet to PMDD technology as we believed the industry would move in that direction,” said Goldwind’s Chairman and CEO, Wu Gang. “It was clear to us that for the wind industry to evolve, it must become more efficient, more cost competitive and more appealing to potential customers and these are exactly the benefits that Goldwind leverages thanks to PMDD technology.”
Gearless Design with Advantages on high reliability and Low Cost of Electricity
According to BTM Consultancy’s World Market Update 2010 and World Market Update 2011, PMDD wind turbines offer a host of advantages over traditional gearbox turbines such as higher annual power output. The average annual power output is 3-5% higher compared to the traditional designs.
According to the report, the market share of direct drive wind turbines increased to 21.2% in2011 from 17.6% in2010, which was largely attributed to the sales of Goldwind PMDD wind turbines. Additionally, according to IHS Emerging Energy Research’s report and Morgan Stanley’s Wind Power Sector report, multi-MW direct-drive turbines register 20% fewer failures than similar capacity geared turbines; IHS ERR’s report also stated that direct drive technology is set to become the preferred technology concept as it will significantly improve the final cost of electricity.
Goldwind’s PMDD wind turbines have been widely recognized by customers and the market for their exceptional annual average availability. As a result ofits continuous product optimization, the annual average fleet-wide availability for 2009, 2010 and 2011 was above 97%.
To date, Goldwind has successfully developed 1.5MW, 2.5 MW, 3.0MW PMDD wind turbines. Moreover, to adapt to the unique and customized needs of individual projects, the company offers low wind speed, high altitude, low temperature, high temperature, offshore and tidal PMDD series for diverse environmental conditions.
Commenting on permanent magnet generators, GL Garrad Hassan, one of the world´s leading renewable energy consultants, said, “It was the PMG’s greater efficiency at part load operation that led Garrad Hassan to conclude it was the superior generator for economic wind energy conversion”
Grid Connection Capability Meets International Standards
In November 2011, Goldwind’s Mortons Lane project was successfully approved for grid connection in Australia and passed the stringent assessment by local network operator Powercor Australia. In July 2011, Goldwind’s 1.5MW PMDD wind turbine passed the ultimate zero voltage ride-through test administered by GL Garrad Hassan.
Goldwind’s 1.5MW unit had previously been certified for its LVRT capability in August 2010 by the China Electric Power Research Institute. It also became the first domestic wind turbine which passed a series of on-site LVRT tests in October 2010. In December 2010, Goldwind’s 1.5MW unit also became the first PMDD wind turbine that passed a series of computer-simulated LVRT tests on the Inner Mongolia Electric Power Research Institute’s real-time digital simulation (“RTDS”) platform. The achievements demonstrated the outstanding LVRT capability of PMDD technology as well as Goldwind’s the strong R&D and technological advantages.