Recently, the State Electricity Regulatory Commission issued the “Wind Power Safety Supervision Report.†In recent years, China’s wind power has been centralized and the problem has begun to appear. In the first eight months of this year, 193 wind turbine generators were offline, which was 2.4 times the total amount of the previous year. However, statistical analysis of unit failures of 12 major domestic wind power construction companies, such as Huaneng, Datang, and Huadian, found that wind turbine failures have occurred frequently since 2010 and have been on an upward trend.
Gansu Qiaoxi First Wind Farm 598 typhoon power unit off-grid accident, Hebei Jiaxin wind farm 629 wind power unit off-grid accident, Gansu Qianhekou West Second Wind Farm 702 wind power unit trawling accident and Gansu Jiayuguan substation accident led to 1278 typhoon When the motor unit was disconnected from the grid, the four large-scale wind turbine generators were severely criticized by the Electricity Regulatory Commission. Especially the Gansu Qiaoxi First Wind Farm 598 typhoon wind turbine off-grid accident occurred on February 24, 2011, and this period is the domestic peak winter electricity peak season.
According to the regulatory report, the number of domestic wind power equipment manufacturing enterprises has rapidly increased, and only wind power machine manufacturing enterprises have exceeded 80, and the domestic machine market is highly competitive. In addition, some wind farm construction units adopt the lowest bid winning mode during the bidding process. The unit price of kilowatts has continued to decline. Some wind power equipment manufacturers have used lower-priced alternative parts to reduce costs, resulting in a decline in product quality. At the same time, the design of some wind farms is flawed, and the construction quality of wind farm construction is outstanding. Some wind farm construction units have the phenomenon of rushing progress and light management. The inspection, inspection, control and acceptance systems of the project quality are not in place, and there is no effective construction quality. Control. Some units that do not have construction qualifications have undertaken the main construction tasks.
The supervision report shows that in 2010, there were a total of 80 wind turbine off-grid accidents in the country, and the number of off-grid accidents increased from January to August 2011 to 193, with an obvious upward trend. In addition, there have been a number of accidents in the wind farms in Liaoning, Inner Mongolia, Gansu, and other places that caused fire and tower collapse.
It is worth noting that the rapid increase in wind power installed capacity has caused the impact of wind power on the power grid to gradually expand from the local distribution network to the main network. Smaller faults may trigger large fluctuations in the grid voltage, causing large areas of wind turbines to be disconnected. Lead to the disintegration of regional power grids, and even expanded to a large-scale blackout.
Yang Kun, the chief engineer of the State Electricity Regulatory Commission, said that the SERC has strengthened wind power safety supervision and inspection guidance. The grid-connected safety assessment has been used as a precondition for the qualification of wind farms and the operation of grid-connected operation, and no safety evaluation has been conducted. The wind farm shall not issue a permit, and it is forbidden to connect the new wind farms that do not meet the safety conditions to the grid, and the rectified wind farms that do not meet the safety requirements shall be required to stop the rectification.
The report also revealed that in order to promote the sustainable development of wind power, China will study and formulate wind power tariff policies such as tariff adjustments for peaking and frequency modulation power supplies, decentralized wind power on-grid tariffs, and industrial policies to guide the local consumption of some wind power.
Gansu Qiaoxi First Wind Farm 598 typhoon power unit off-grid accident, Hebei Jiaxin wind farm 629 wind power unit off-grid accident, Gansu Qianhekou West Second Wind Farm 702 wind power unit trawling accident and Gansu Jiayuguan substation accident led to 1278 typhoon When the motor unit was disconnected from the grid, the four large-scale wind turbine generators were severely criticized by the Electricity Regulatory Commission. Especially the Gansu Qiaoxi First Wind Farm 598 typhoon wind turbine off-grid accident occurred on February 24, 2011, and this period is the domestic peak winter electricity peak season.
According to the regulatory report, the number of domestic wind power equipment manufacturing enterprises has rapidly increased, and only wind power machine manufacturing enterprises have exceeded 80, and the domestic machine market is highly competitive. In addition, some wind farm construction units adopt the lowest bid winning mode during the bidding process. The unit price of kilowatts has continued to decline. Some wind power equipment manufacturers have used lower-priced alternative parts to reduce costs, resulting in a decline in product quality. At the same time, the design of some wind farms is flawed, and the construction quality of wind farm construction is outstanding. Some wind farm construction units have the phenomenon of rushing progress and light management. The inspection, inspection, control and acceptance systems of the project quality are not in place, and there is no effective construction quality. Control. Some units that do not have construction qualifications have undertaken the main construction tasks.
The supervision report shows that in 2010, there were a total of 80 wind turbine off-grid accidents in the country, and the number of off-grid accidents increased from January to August 2011 to 193, with an obvious upward trend. In addition, there have been a number of accidents in the wind farms in Liaoning, Inner Mongolia, Gansu, and other places that caused fire and tower collapse.
It is worth noting that the rapid increase in wind power installed capacity has caused the impact of wind power on the power grid to gradually expand from the local distribution network to the main network. Smaller faults may trigger large fluctuations in the grid voltage, causing large areas of wind turbines to be disconnected. Lead to the disintegration of regional power grids, and even expanded to a large-scale blackout.
Yang Kun, the chief engineer of the State Electricity Regulatory Commission, said that the SERC has strengthened wind power safety supervision and inspection guidance. The grid-connected safety assessment has been used as a precondition for the qualification of wind farms and the operation of grid-connected operation, and no safety evaluation has been conducted. The wind farm shall not issue a permit, and it is forbidden to connect the new wind farms that do not meet the safety conditions to the grid, and the rectified wind farms that do not meet the safety requirements shall be required to stop the rectification.
The report also revealed that in order to promote the sustainable development of wind power, China will study and formulate wind power tariff policies such as tariff adjustments for peaking and frequency modulation power supplies, decentralized wind power on-grid tariffs, and industrial policies to guide the local consumption of some wind power.
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