本論文研究太陽能智慧變流器之虛功率調控方法與設計，並將其運用於併有多具太陽能發電之配電饋線系統改善電壓。本研究使用MATLAB/Simulink來建立配電系統模型，為了使智慧變流器精準地控制由再生能源所送出的實功率與虛功率，故以鎖相環為基礎架構，設計具有集中與分散式控制的虛功率調控模式，並改善其補償追逐之問題。接著建立代表性的配電饋線範例系統作為模擬與分析使用，最後整合變電所內並聯電容器、饋線調壓器與智慧變流器，探討設備間之協調。為探討電壓控制效果，分別模擬與分析晴天、多雲與雨天不同太陽能發電量與負載之情境，結合夏月住宅型之24小時逐時負載，觀察全日電壓狀況與智慧變流器之補償情形。最後對智慧變流器提出建議設定方式，預期能提供實務運轉上的助益。

This thesis studies the reactive power control method and design of photovoltaic smart inverter, and implementation in distribution system with multiple photovoltaic generations to improve the voltage issue. This study uses MATLAB/Simulink to establish a distribution system model. In order to make the smart inverter accurately control the real power and reactive power sent by the photovoltaic source, the phase-locked loop is used as the infrastructure to design the reactive power control mode with centralized and decentralized control, and to improve the problem of compensating for hunting. A representative distribution feeder example system for simulation and analysis is established, and finally integrate parallel capacitors, feeder regulators and smart converters to explore the coordination between equipment are integrated. In order to probe the effect of voltage control, the situation of solar power generation in sunny, cloudy and rainy days are simulated, 24-hr load of summer residential type is used, the full-day voltage status and smart inverter compensation situation are observed. Finally, the proposed setting method for the smart inverter is expected to provide practical operation benefits.

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