Controller Design for Dynamic Voltage Restorers by use of PQR Power Theory I - Reference Wave Generation

PQR 순시전력이론에 의한 Dynamic Voltage Restorer의 제어기 설계 I -기준전압 파형의 발생

Dynamic Voltage Restorers (DVR)s are known as the best effective and economic means to compensate for voltage sags and swells [1]-[11]. This paper proposes a novel method to generate reference voltages synchronized with the grid whether the line voltages are distorted by a fault or not. The proposed reference wave generator (RWC) looks for the original wave forms from the corrupted line voltages and synthesizes the expected positive sequence reference waves for DVRs. There is no transient problem on the generated reference waves when the line voltages are distorted by the fault.