Active control method and system for improving AGC control performance of wind power plant

Abstract

The invention discloses an active control method and system for improving the AGC control performance of a wind power plant, and the method comprises the steps: making the most of wind turbines with ahigh adjustment speed according to the difference of the active power control response time of different wind turbines, repeatedly and quickly tracking the active power instruction value of a grid-connected point, and shortening the AGC response time; when the active power fluctuation of the wind turbine generator with the AGC function quitting leads to that the active variable quantity of the grid-connected point exceeds a dead zone, immediately redistributing to reduce the distribution interval time. Different distribution reference values are adopted according to different active power distribution triggering conditions, and the phenomena that the distribution result is too large or too small and oscillation occurs in the adjusting process due to the fact that the active power reference values, participating in calculation, of the grid-connected point and the wind turbine generator are inaccurate are avoided. By compensating the active power output error of the wind turbine generator, the deviation between the active power distribution value and the actual value of the wind turbine generator is reduced, and the AGC regulation precision of the wind power plant is improved.

Description

technical field [0001] The invention relates to an active power control method and system for improving AGC control performance of a wind farm, and belongs to the technical field of electric power system control. Background technique [0002] In recent years, wind power has been vigorously developed as a renewable clean energy power generation. Due to the randomness and volatility of wind power, it brings a series of problems to the safe operation of the power grid. In order to ensure the safe and stable operation of the power grid, wind farms connected to the power grid are required to have power regulation capabilities, and the regulation performance requirements are getting higher and higher. "NB / T 31078-2016 Wind Farm Grid-connected Performance Evaluation Method" puts forward specific requirements for the limit value of AGC control indicators of wind farms, so it is necessary to study the control method of active power of wind farms, improve the AGC control performance ...

AI Technical Summary

Problems solved by technology

Affected by meteorological conditions, especially when the wind speed changes suddenly, the output power of the model wind turbines drops and rises sharply, making the change of the actual active power value of the wind farm grid-connected point exceed the dead zone of active power regulation at the grid-connected point, affecting the AGC response time of the wind farm

In addition, due to the large error in the speed and pitch control of the wind turbine, the actual active power output value of the wind turbine deviates from the assigned value, resulting in the AGC adjustment accuracy of the wind farm not meeting the limit requirements.

Images