本論文提出以鋰離子電池為基礎之儲能系統，將該儲能系統經由一個雙向直流對直流轉換器加入含有永磁同步發電機為基礎的風場與光伏太陽能場之混合再生能源系統之直流鏈，該直流鏈再經過一個直流對交流換流器併入四機雙區域之多機電力系統，以評估該儲能系統於改善混合再生能源系統連接多機電力系統穩定度之有效性。本文使用MATLAB/Simulink套裝軟體建立該單一鋰離子電池之等效電路模型，並且詳細描述該模型之建立步驟，再進一步提出多個鋰離子電池之聚集等效模型，並分析其性能與特性，以驗證該聚集等效模型之有效性。文中亦建立所研究混合再生能源系統模型、鋰離子電池儲能系統以及四機雙區域多機電力系統之整合模型，並針對該整合模型在不同運轉條件下進行穩態、動態及暫態之特性分析。文中並比較了加入鋰離子電池儲能系統前後，對於所研究混合再生能源系統連接多機系統之功率平滑及穩定度改善能力。

This thesis proposes a Li-ion battery-based energy-storage system (ESS) integrated with the DC link of a hybrid renewable-energy system with a permanent-magnet synchronous generator-based wind farm and a photovoltaic solar farm through a bidirectional DC-DC converter. The DC link is connected to a two-area multi-machine power system through a DC-AC inverter in order to analyze the effectiveness of the proposed ESS for improving the stability of the studied system. The modeling steps for the equivalent-circuit model of a Li-ion battery using a software package of MATLAB/Simulink are described in detail. The performance and characteristics of an aggregate equivalent-circuit model of multiple Li-ion batteries are analyzed to verify its effectiveness. The complete studied system model is established to simulate the steady-state, dynamic, and transient characteristics under various operating conditions. Moreover, the comparative power-smoothing and stability-improvement characteristics of the studied hybrid renewable-energy system fed to the multi-machine power system with and without the proposed ESS are also achieved.

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