The State Electricity Regulatory Commission issued the “Wind Power Safety Supervision Report†on December 2. The “Report†combed the safe operation of the wind power industry since 2010, and for the first time fully disclosed the wind power operation accidents in the past two years, especially the large-scale fan off the network. The rectification of the accident.
The report pointed out that according to statistics, as of the end of August 2011, there were a total of 486 wind farms operating nationwide, with an installed capacity of 39.24 million kilowatts and a wind power capacity of 13.77 million kilowatts under construction. In 2010, there were a total of 80 wind power grid off-grid accidents across the country, including one off-grid accident with a loss of 10-50 million kilowatts of wind power output, and one off-grid accident with wind power output exceeding 500,000 kilowatts. In January-August 2011, there were 193 accidents involving wind turbine disconnection across the country, including 54 accidents involving a loss of wind power from 10-50 million kilowatts, and 12 accidents caused by loss of wind power from a wind power output exceeding 500,000 kilowatts.
The Deputy Supervisor of the Electricity Regulatory Commission Shi Yubo stated at the press conference that since the beginning of this year, in response to several large-scale off-grid accidents of wind turbines that have occurred one after another, the SERC has further strengthened the supervision of wind power safety in accordance with the directives of the State Council’s leadership and investigated serious accidents. Deal with and urge the power companies to seriously implement anti-accident measures, and promptly curb the momentum of large-scale net-off accidents of wind turbine generators. Yang Kun, chief engineer of the SERC, stated that in August this year, the SERC organized power companies to conduct 360 self-examinations on 360 grid-connected wind farms and 80 wind farms under construction, with a total of 1,700 hidden dangers, currently 53%. The rectification has been completed. In addition, 39 wind farms, 20 provincial power grid companies, and power dispatching agencies were also given key inspections. A total of more than 430 hidden problems were identified and 85% of them have been rectified.
The report pointed out that as of the end of August 2011, 11 wind farms involved in the large-scale off-grid accident of “24†in Jiuquan, Gansu Province had all completed the transformation of low-voltage ride-through capability. Gansu 2235 Taiwan Yunfeng Wind Turbine has completed the transformation of its low-voltage ride-through capability with a conversion rate of 74%. As of the end of August 2011, the wind farms in Gansu Jiuquan and Zhangjiakou, Hebei province, which had a large-scale network loss accident, completed the transformation of the reactive power automatic switching function. The reactive power capacity and related parameter setting basically meet the system voltage regulation requirements. As of the end of August 2011, 360 grid-connected wind farms in the country have all completed key inspections of potential terminations for cable terminations and grounding systems. The Northwest Hydropower Survey and Design Institute has solved the problem of increasing the number of cable terminals and increasing the number of fault sources for wind turbines with boosted voltage and common distribution box type transformers. After special studies, the company has upgraded the pressure transformer design, and the 8 box transformers that have been transformed so far have Construction and installation of Yumen wind farm in Gansu.
Yang Kun, the chief engineer of the State Electricity Regulatory Commission, told reporters that due to the completion of the rectification work during the completion of the report, the overall accident rectification was better than what was disclosed in the report.
The report pointed out that according to statistics, as of the end of August 2011, there were a total of 486 wind farms operating nationwide, with an installed capacity of 39.24 million kilowatts and a wind power capacity of 13.77 million kilowatts under construction. In 2010, there were a total of 80 wind power grid off-grid accidents across the country, including one off-grid accident with a loss of 10-50 million kilowatts of wind power output, and one off-grid accident with wind power output exceeding 500,000 kilowatts. In January-August 2011, there were 193 accidents involving wind turbine disconnection across the country, including 54 accidents involving a loss of wind power from 10-50 million kilowatts, and 12 accidents caused by loss of wind power from a wind power output exceeding 500,000 kilowatts.
The Deputy Supervisor of the Electricity Regulatory Commission Shi Yubo stated at the press conference that since the beginning of this year, in response to several large-scale off-grid accidents of wind turbines that have occurred one after another, the SERC has further strengthened the supervision of wind power safety in accordance with the directives of the State Council’s leadership and investigated serious accidents. Deal with and urge the power companies to seriously implement anti-accident measures, and promptly curb the momentum of large-scale net-off accidents of wind turbine generators. Yang Kun, chief engineer of the SERC, stated that in August this year, the SERC organized power companies to conduct 360 self-examinations on 360 grid-connected wind farms and 80 wind farms under construction, with a total of 1,700 hidden dangers, currently 53%. The rectification has been completed. In addition, 39 wind farms, 20 provincial power grid companies, and power dispatching agencies were also given key inspections. A total of more than 430 hidden problems were identified and 85% of them have been rectified.
The report pointed out that as of the end of August 2011, 11 wind farms involved in the large-scale off-grid accident of “24†in Jiuquan, Gansu Province had all completed the transformation of low-voltage ride-through capability. Gansu 2235 Taiwan Yunfeng Wind Turbine has completed the transformation of its low-voltage ride-through capability with a conversion rate of 74%. As of the end of August 2011, the wind farms in Gansu Jiuquan and Zhangjiakou, Hebei province, which had a large-scale network loss accident, completed the transformation of the reactive power automatic switching function. The reactive power capacity and related parameter setting basically meet the system voltage regulation requirements. As of the end of August 2011, 360 grid-connected wind farms in the country have all completed key inspections of potential terminations for cable terminations and grounding systems. The Northwest Hydropower Survey and Design Institute has solved the problem of increasing the number of cable terminals and increasing the number of fault sources for wind turbines with boosted voltage and common distribution box type transformers. After special studies, the company has upgraded the pressure transformer design, and the 8 box transformers that have been transformed so far have Construction and installation of Yumen wind farm in Gansu.
Yang Kun, the chief engineer of the State Electricity Regulatory Commission, told reporters that due to the completion of the rectification work during the completion of the report, the overall accident rectification was better than what was disclosed in the report.
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