基于电压源型逆变器的动态电能质量补偿器

Voltage source inverter based dynamic power quality compensators

介绍了 3种基于电压源型逆变器的用于配电系统的新型动态电能质量补偿器———有源滤波器、动态电压恢复器和统一电能质量控制器 ,与传统的晶闸管控制的投切电容器和 /或电抗器等调节手段相比 ,具有响应速度快、调节连续、功能多样、体积小等诸多优点 ,能有效补偿电压跌落、闪变等动态电能质量问题。对电压源型逆变器的工作机理作了较详细的论述 ,与电流型逆变器相比 ,不存在换流不成功而导致高电压的危险 ,具有可靠性高、控制灵活等优点。

Three dynamic power quality compensators based on VSI (Voltage Source Inverter) are described,i.e.APF(Active Powor Filter),DVR(Dynamic Voltage Restorer) and DSUnicon.Compared with thyristor switched capacitors and (or) reactors,these compensators have the features of fast response,continuous regulation,multiple functions,smaller physical size and so on.The dynamic power quality defects caused by voltage sag and swing can be effectively compensated.The working principles of voltage source inverter are briefly described.Compared with CSI(Current Source Inverter),VSI does not exist commutation failure issues,therefore there is no risk of getting high voltages.It has the advantages of high reliability and flexible control.