SERC: Wind turbines in wind farms must have low voltage ride through

Recently, the State Electricity Regulatory Commission issued the “Circular on Issuing Safety Conditions and Evaluation Standards for Wind Farm Connections” (Safety [2011] No. 79), requiring all units to comply with the “Safety Conditions and Evaluation Criteria for Wind Farm Connections”. 》Comprehensively carry out safety assessment of grid-connected wind farms, and put forward opinions on the low-voltage ride-through capability of wind turbines in the evaluation of grid-connected safety.

Five points are put forward regarding the low-voltage ride-through capability of wind turbines: First, the models have been tested and certified for low-voltage ride-through capability, and they are required to provide relevant information such as inspection certificates; if they have not been certified, low-voltage ride-through capability should be tested. The second is that wind farms that have been connected to the grid for wind farms have been tested or confirmed to be incapable of low-voltage ride-through, and should be in accordance with the notice of the Electricity Regulatory Commission on strengthening the safety supervision and management of wind farms to curb the large-scale wind turbine off-grid accidents ( Office Security [2011] No. 26) requires a low voltage ride through capability. Third, grid-connected wind farms have been established wind turbine transformation program for low-voltage ride-through capability, and temporarily can be conditionally passed through the grid security evaluation; failed to develop the wind turbine low-voltage ride-through capacity transformation plan or failed to complete the transformation task No wind power generators are allowed to be connected to the grid for operation. Fourth, for the wind turbines that are commissioned before the end of 2008 and below the MW level, the requirements for low-voltage ride-through capability of the units can be determined based on the local power grid and wind power installation. Fifth, the wind turbines of the newly-built wind farms must have low-voltage ride-through capability. Otherwise, the grid-connected safety assessment will not be passed and the wind turbines may not be connected to the grid.