Controller Design for Dynamic Voltage Restorers by use of PQR Power Theory II - Determine The Compensation Voltages

PQR 순시전력이론에 의한 Dynamic Voltage Restorer의 제어기 설계 II -보상전 압의 결정

This paper discusses how to generate the reference compensation voltages in Dynamic Voltage Restorers (DVR) by use of PQR power theory Sensed three-phase terminal voltages are transformed to PQR coordinates without time delay. Since the reference voltages in PQR coordinates are do values, the voltage controller for DVRs is simple and easy to design. Proposed control method can be implemented by feedforward controllers or by feedback controllers. This paper verified the theory in the feedforward controller of a DVR by experiments.