本論文研究含大量太陽能發電之二次變電所主變壓器轄區電壓控制方法與策略。考量太陽能併入及負載量造成之電壓變動，以二次變電所主變壓器轄區基本架構，建立代表性的範例系統進行模擬與分析。若當前的電壓控制方法無法解決電壓變動問題，則考慮再安裝饋線調壓器進一步改善。最後整合變電所內有載分接頭切換器、並聯電容器與饋線調壓器、太陽能智慧變流器四項設備，提出整體電壓控制策略，並探討設備間之協調。本研究使用MATLAB/Simulink建立配電系統模型，模擬與分析輕、中、重載和不同太陽能發電量下之電壓與設備動作情形，亦考慮夏月住宅型和工業型一日逐時負載與太陽能發電量之情境。最後利用MATLAB/GUI開發人性化電壓控制介面，介面考慮整體電壓控制策略，並可設定自動運轉、手動運轉，期望能提供建議供運轉人員參考。

This thesis investigates the voltage control method and strategy of the main transformer feeding area in a secondary substation with a large amount of solar power. Considering the voltage variation caused by loads and incorporation of solar energy, a representative example system is established based on the structure of the main transformer feeding area in secondary substation in simulation and analysis. If the existing voltage control methods cannot solve the voltage variation problem, the feeder voltage regulator (FVR) is considered to install to improve furthermore. Finally, it is to integrate four devices, which are on-load tap changer (OLTC), shunt capacitor (SC) in the substation, feeder voltage regulator, and smart inverter (SI), to propose the overall voltage control strategies and discuss the coordination among these devices. In this study, the MATLAB/Simulink is used to establish the distribution system model to analyze the voltage control and equipment action in the situation of light, medium, and heavy system loads and different solar power generation. The situations of summer residential and industrial hourly load and solar power are under consideration as well. At last, it is to use the MATLAB/GUI to develop the user-friendly voltage control interface. The overall voltage control strategy can be set to operate in automatic or manual mode, which is expected to provide recommendations for the operating personnel.

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