Research On Simulation And Experiment Of Compound Current Quality Compensator

Currently, power quality control device has been widely used in power system to adjust the problems of power quality. In power quality device, the parallel current type adjustment devices are mainly including active power filter (APF), static synchronous compensator (STATCOM) and so on, which all are flexible AC transmission system (FACTS) devices. However, the existed problems of various current quality are not stand-alone power quality problems but the power quality problems of various current quality compound in the system.In this article, the researched compound current quality compensator(CCQC) can effective solve the issues of various current quality compound disturbance in the system. It used a double-PWM converter topology.PWM rectifier can provide a stable DC voltage and continuous active power for the device, implemented the device has a function of compound current compensation. P WM inverter used a control strategy of compound unify compensation, it implemented the compensation of a variety of current quality compound disturbance. Besides, to meet the high level system requirements, it used cascaded H-bridge mode when designed the device topology to improve the output voltage level.The focus of this article is mainly based on the research of the simulation and experimental analysis. By PSCAD simulation platform, built a cascaded H-bridge model to do relevant simulation study. And a low-voltage experimental prototype was designed based on all-digital controller formed by DSP and FPGA, did relevant experiment study by the experiment platform. Finally, by the simulation and experiment analysis results, it verifies the effectiveness of this control strategy and the feasibility of the device function.