Grid-connected operation reactive power controlling and regulating method suitable for large wind farm

Abstract

The invention discloses a grid-connected operation reactive power controlling and regulating method suitable for a large wind farm. In the method, the matching between the large wind farm and a power grid can be coordinated, the reactive power requirement of a regional power grid on the wind farm is calculated, and the reactive power of the wind farm is uniformly planned; after each large wind farm acquires the reactive power requirement of the regional power grid, the reactive power requirement is uniformly allocated among wind turbines in each wind farm, and the reactive power output of each wind turbine is controlled, so that the reactive power output of the grid-connected point of the wind farm meets the system load change and the bus voltage fluctuation caused by wind speed and dynamic load change is inhibited so as to meet the reactive power requirement of the power grid on the wind farm; and the method has the function of maintaining the stable voltage of the regional power grid of the wind farm.

Description

technical field [0001] The invention relates to a controllable and adjustable reactive power method suitable for grid-connected operation of large-scale wind farms, and belongs to the technical field of reactive power voltage control for grid-connected operation of large-scale wind farms. Background technique [0002] Wind power, as the new energy technology with the most prospect of large-scale development and commercial development, will be vigorously developed. The rapid development of wind power has brought many new problems to the power system. As the scale of wind farms and the capacity of a single wind turbine continue to increase, the impact of large-scale wind farms on grid operation has become increasingly prominent. The output of wind turbines is random, intermittent and uncontrollable. The large-scale access of wind power will have a great impact on the voltage and reactive power characteristics of the grid. The grid-connected operation of wind farms will inevita...

AI Technical Summary

Problems solved by technology

The characteristic of my country's wind power grid connection is that large-scale clustered wind farms are connected to the grid. Due to various reasons, the variable-speed constant-frequency wind turbines in my country's wind farms usually operate in a constant power factor mode, and their fast and flexible reactive power adjustment capabilities are not fully utilized

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