本論文提出採用動態電壓恢復器結合超級電容器應用於配電系統中，以改善電壓驟降、驟昇、電力諧波和三相電壓不平衡等不良的電力品質。本論文之架構一研究了市電端發生不良電力品質時，動態電壓恢復器結合超級電容之補償效果；架構二以IEEE四節點饋線系統為基礎，透過改變配電變壓器繞組為U-V/V-V連接、改變傳輸線R/X比例與負載大小來分析電壓不平衡，並與配電型靜態同步補償器之效能比較；架構三以實際台電配電系統為基礎，使用動態電壓恢復器結合超級電容器改善系統電壓不平衡，並探討對系統之再生能源發電系統之改善影響。由本論文三個架構之模擬結果，驗證所提出動態電壓恢復器結合超級電容器於改善配電系統電力品質的可行性。

This thesis proposes a dynamic voltage restorer integrated with a supercapacitor (DVR-SC) to improve the power quality such as voltage sag, swell, harmonics, and three-phase voltage unbalance in distribution systems. The grid’s power quality problem of system configuration 1 can be compensated by the proposed DVR-SC. The DVR-SC and a distributed static synchronous compensator (D-STATCOM) are applied to system configuration 2 based on the IEEE four-node feeder system to mitigate voltage unbalance due to the change of distribution transformer’s U-V/V-V winding connections, transmission line ratio of X/R, and load magnitude. System configuration 3 based on the distribution system of Taiwan Power Company is used to study three-phase voltage unbalance and discuss the improvement of voltage unbalance on the renewable-energy power-generation systems using the proposed DVR-SC. The simulation results of the three system configurations show that the proposed DVR-SC can be used to effectively improve the power quality of the studied distribution systems.

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