Direct-drive wind turbine passes power dip test
March 31, 2011 Category Alternative energy, Environment
China’s largest direct-drive wind turbine recently passed an international test meant to determine if it could continue operating even when there is a power dip on the national grid. The 2.5-megawatt turbine was developed by Guangxi Yinhe Avantis Wind Power Co. It recently passed a low-voltage ride-through test, said Lars Andreasen, General Manager of the turbine maker in Beijing, adding that it was the largest direct-drive permanent magnetic wind turbine in the world that has passed the test. The test measures the capacity of a turbine to continue operating when the voltage on the electrical grid dips. In June 2009, the device became the first 2.5 MW wind turbine to be connected to China’s national grid. On March 5 this year, the turbine, which stands at a testing site in Beihai, Guangxi autonomous region, passed two-phase and three-phase low-voltage ride-through tests, carried out by the China Electric Power Research Institute. And on March 7, the prototype again passed the test, which, this time, was conducted according to standards upheld by the International Electro-technical Commission. Few of the 1.5 MW wind turbines now popular in China have done so well. In October 2010, a 5 MW direct-drive wind turbine rolled off the production line of the Xingtan Electric Manufacturing Corporation, a wind turbine maker in Hunan province. The turbine is now the largest in the country, and the company is planning to develop 6 MW and 7.5 MW direct-drive wind turbines.
In March 2010, the National Energy Bureau announced it had established a special committee to draft standards for the connection of wind-power devices to the power grid. According to Dai Huizhu, Professor at the China Electric Power Research Institute, 598 wind turbines in Jiuquan, Gansu province, were disconnected from the grid during voltage sags in February this year. Hundreds of turbines in Jilin province had the same troubles in January. Xie Wenbo with the wind power branch of the China Guangdong Nuclear Power Group, said that the 1.5 MW wind turbines could operate soundly only for three years and that after that they will begin to show problems. Liu Bin from China Wind Power, a leading developer of wind farms, said: “With wind turbines of this quality, China cannot realize its ambitious capacity objectives for 2020.” Bringing the thousands of wind turbines now in operation up to a better standard will require large expenditures, amounting to up to 1% of the value of the turbines themselves, industry officials say. China aims to have the capacity to generate 290 gigawatt (GW) from new energy sources by 2020, with 150 GW coming from wind power, the China Daily reports.
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