用于通用电能质量控制器的一种简单补偿策略和统一控制方法

A Simple Compensation Strategy and Unified Control Scheme for Universal Power Quality Controller

将谐波和短时电压跌落问题确定为通用电能质量控制器的补偿对象,进而提出了相应的补偿策略和统一控制方法。相对其他多功能的补偿器来说,该方法简单且能有效协调两个变流器的控制,不需区分不同的电能质量问题并选择不同的控制策略,对变流器容量要求也不高。仿真和实验表明该补偿策略和控制方法有效,通用电能质量控制器具有良好的补偿性能。

This paper proposes the concept of combining the functions of harmonic compensation of a double-converter compensator with the compensation of short-term voltage disturbances. The equipment based on this concept is called Universal Power Quality Controller. It is intended to compensate major power quality problems (harmonics and voltage sags) originated both from the load side and from the supply source side and does not require more power rating of converters than the original harmonic compensation. A compensation strategy and a unified control scheme for this universal power quality controller are proposed, which are very simple compared to those for other multiple-function compensators and the respective control algorithms for the two converters are also proposed and discussed in detail. Simulation and prototype experimental results are presented to validate these control methods and corresponding performance of the universal power quality controller.