Research On Compensation Control Strategy Of Unified Power Quality Conditioner

The unified conditioning technology of power quality, based on power electronic technology, is one of all important branches of custom power. The unified power quality conditioner (UPQC) can not only compensate distorted wave form, but also restore dynamical voltage and implement flexible power supply. Traditionally, the device for power quality conditioner can compensate distorted voltage wave form and current wave form respectively. However, UPQC, which has capacity of simultaneously coordinating voltage and current wave form compensation and satisfy the demand of the power consumer and supply system, must have a prospective future. This paper, based on practice of improvement of power quality, deals with the theory, topology, real-time algorithm for distorted wave form, compensation strategy, control strategy for loop system.This paper, at first, introduces the development actuality and present problem existed; the second chapter mainly introduces the principle of the active power filter; the third chapter mainly introduces the topological configuration and principle of UPQC; the fourth chapter studies on real-time detection of distorted component of current and voltage wave form; the fifth chapter studies on the compensation control strategy and simulation of UPQC. The result shows that the control strategy which referred in the paper has better effect.