采用APF和SVC改善微网电能质量

采用有源滤波器和静止无功补偿装置联合运行的方式来提高孤立运行的微网电能质量,其中有源滤波器接在分布式电源逆变器出口侧,滤除谐波电流,其电流检测采用ip-iq法,跟踪控制采用无差拍控制与空间矢量脉冲宽度调制的方法;静止无功补偿装置,由晶闸管控制的电抗器和晶闸管投切的电容器组成,安装在微网负荷侧,随负荷需求供给无功,维持负荷侧电压稳定,减小系统网损,并提高电能质量。经实验证明了该联合系统对提高微网电能质量是有效的。

Combined System of APF and SVC for Power Quality Improvement in Microgrid

This paper introduces a combined system of active power filter(APF) and static var compensator(SVC) to improve power quality of microgrid.In the combined system,APF,installed at the outlet of the micro source inverter,mitigates harmonic current.Its current detection method is ip-iq,and tracking method is deadbeat control and space vector pulse width modulation(SVPWM);SVC,which is set near the load of microgrid,comprising thyristor controlled reactor(TCR) and thyristor switched capacitor(TSC),supplies reactive power,relives voltage variation,and reduces power loss on the transmission lines.APF and SVC,performing respectively,improve the power quality of microgrid together.Simulation results show the effectiveness of the combined system later in this paper.