无功功率补偿对故障后电压恢复影响的研究

摘要

According to the relationship between reactive power and voltage,the effects of reactive power compensation on the voltage recovery after power system faults are theoretically analyzed on the premise of ignoring the line resistance and active power loss of the system.And the conclusions that the effects of different reactive power compensation on different levels of voltage sags are diverse are obtained.To test and verify the correctness of theoretical analysis,an OMIB system with STATCOM system is modeled in PSCAD/EMTDC software to simulate the effect of different reactive power compensation to the recovery of grid voltage,and the correctness of the theoretical analysis is verified by the simulation results.%电压是电力系统稳定与控制的重要参数和内容，无功补偿是维持系统电压稳定和质量的重要途径。针对无功补偿装置的广泛应用，分析了无功功率补偿与电力系统故障后的电压关系，尤其是不同电压跌落程度的对电压恢复过程的影响。在PSCAD/EMTDC仿真软件中搭建了含有无功补偿装置STATCOM的单机无穷大系统，针对电力系统电压不同的跌落程度和不同程度的无功功率补偿对电网电压恢复的影响进行了仿真，仿真结果验证了理论分析的正确性。