Impact Analysis of LVRT Control of Wind Turbine on Transient Overvoltage of Power System

With the increasing proportion of wind power capacity into the grid, it is brought about a serious of questions to the security and stability of the power system. In particular, the low voltage ride through (LVRT) ability of wind turbine when the grid voltage sag is the extensive research of the problem at present. This paper firstly clarifies the control switching logic of the wind farm during the grid fault ride-through process and analyzes the transient active and reactive power output characteristics of the wind turbine during the LVRT and recovery process in detail. Secondly, the mechanism of transient overvoltage of wind farm low penetration process deterioration system is discussed. On this basis, the simulation models of DFIG, SVG and energy storage equipment are established, and the PSD-BPA electromechanical transient simulation model of each equipment is built to study the influence of model control parameters on its dynamic characteristics.