基于PSCAD的风电场低电压穿越无功支撑仿真研究

首先分析风电场低电压穿越(low voltage ride-through,LVRT)能力,然后介绍以双馈感应发电机(doubly-fed induction generator,DFIG)为主体的风电场模型以及静止同步补偿器(static synchronous compensator,STATCOM)的控制策略。最后将STATCOM和静止无功补偿器(static var compensator,SVC)分别应用到含风电场的无穷大系统中,在电力系统仿真软件PSCAD上搭建模型,并对系统故障状态进行仿真,在此基础上分析STATCOM和SVC的无功补偿特性,并对补偿效果进行比较。仿真结果表明无功补偿装置可以在系统故障后提供无功支撑,提高了风电场的低电压穿越能力,并且STATCOM无功补偿性能较SVC更优。

Modeling and Simulation of the Reactive Power Support of Low Voltage Ride-through in Wind Farm Based on PSCAD

This paper first analyzes the low voltage ride-through (LVRT) ability of wind farms. Then it introduces the model of wind farms based on doubly-fed induction generator (DFIG) and the control strategy of static synchronous compensator (STATCOM). Finally, STATCOM and static var compensator (SVC) are respectively applied to the infinite power system, including wind farms. The model is built in PSCAD simulation platform, and the simulation is made in system fault state. Based of that , the reactive power compensation character of STATCOM and SVC are analyzed, and the compensation effect are compared. The simulation results show that reactive power compensation device can provide reactive power support after the faults, and improve the LVRT capability. But STATCOM has better reactive power compensation than SVC.