含风力发电机的微网电压稳定控制研究

摘要

异步风电场接入系统后会影响系统的暂态电压稳定性。采用电力系统仿真软件DIgSILENT/Power Factory设计出一种应用于恒速异步风电机组的静止无功补偿器（SVC）模型，并通过对风力发电机并入配电网的系统进行仿真计算来验证所建SVC模型对提高系统暂态稳定性的效果。仿真结果表明，在风速变化的情况下，SVC能够有效缓解恒速异步风电机组机端电压的波动；采用SVC设备能够有效改善异步风电场的电压稳定性，确保电网的安全稳定和风电机组的不间断运行。%ABSTRACT:Introducing the asynchronous wind farm into the electric power system will affect the transient voltage stability of the system.This paper designs a static var compensator (SVC)model used in a constant-speed asynchronous wind turbine by adopting the software of DIgSILENT/Power Factory, and verifies the effect of the SVC model for improving the transient stability of the system through the simulating calculation of the system incorporating the wind turbines into the distribution network, and based on the simulation results, points out that in the case of the wind-speed changing SVC can effectively relieve the terminal voltage of constant-speed asynchronous wind turbines, and adopting SVC equipment can effectively improve the voltage stability of the asynchronous wind farm, ensuring the the safety and stability of the grid and the continuous operation of the wind turbines.