Instantaneous Compensating Current Control of Active Power Filters with Phase Angle Detecting Method Under Unbalance Power System

불평형 전원 시스템하의 위상각 검출에 의한 능동전력필터의 순시보상 전류제어

This paper describes a new algorithm for active power filters which can be control source current symmetrically under unbalanced condition in power system. Positive sequency voltage is detected by symmetrical coordinate method and compensating reference current of active power filters is calculated using by accurate phase angle information of positive sequency voltage. The basic principle of the proposed method is described in detail and the conventional and proposed phase detecting methods are compared and discussed through the simulation results.