Offshore wind plant reactive coordination control method based on reactive voltage sensitivity

Abstract

The invention discloses an offshore wind plant reactive coordination control method based on reactive voltage sensitivity, and the method specifically comprises the steps: detecting the voltage and power of each node, and judging whether the voltage of a grid-connected point crosses a line or not; distributing reactive power output of an offshore wind turbine generator and the reactive power compensation device; and distributing reactive power output of each wind turbine generator in the offshore wind power plant. According to the invention, the reactive power regulation capability of the windturbine generator can be fully utilized, and the installation cost of the reactive power compensation device of the offshore wind plant can be reduced; the reactive power output of a reactive power supply in the offshore wind plant is distributed by utilizing reactive voltage sensitivity; the dynamic regulation capacity of the wind turbine generator can be fully utilized, on one hand, the reactive power margin in the wind power plant can be increased, on the other hand, the reactive power output burden of the wind turbine generator can be reduced, and the orderliness of reactive power outputof the offshore wind turbine generator and the reactive power compensation device is achieved.

Description

technical field [0001] The invention belongs to the technical field of offshore wind farms, and in particular relates to a reactive power coordination control method for offshore wind farms based on reactive voltage sensitivity. Background technique [0002] Wind power generation is one of the power generation methods with the most mature technology and the most large-scale development conditions in new energy power generation. Due to the advantages of stable resource conditions and proximity to load centers, offshore wind power has become an important direction for the development of wind power in countries around the world in recent years. On the one hand, due to the intermittence, randomness and volatility of wind resources, the fluctuation of wind power output will lead to corresponding fluctuations in the voltage of grid-connected points of large wind farms. On the other hand, due to the large charging reactive power of submarine cables, the grid-connected point voltag...

AI Technical Summary

Problems solved by technology

For the coordinated control of wind turbines and reactive power compensation devices, relevant literature distributes reactive power to each wind turbine through equal-proportion distribution control, etc., but this does not fully take into account the differences in spatial characteristics of each wind turbine and the reactive power of the system. The corresponding characteristics are also different

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