本論文係分析風力用感應發電機與市電系統併聯運轉時，在市電系統及感應發電機系統上可能發生之動態與穩態特性等影響。在本論文中，以市電併聯運轉之單部與四部風力感應發電機之架構作為研究模型，在三相平衡系統下採用交直軸等效電路模型，分別建立風、風渦輪機、感應發電機以及傳輸線等之模型，推導其數學模式來完成整體動態方程式，並利用特徵值來求出系統動態穩定度。在穩態方面，則分別對風速、葉片慣量、轉子外加電阻、功因改善電容值、市電端電壓以及傳輸線等量對系統特性之影響，做一詳細討論。在動態研究方面，則考慮發生干擾或故障時，可能對風力發電系統造成的影響做評估分析。最後利用等效電路模型，來探討在不同工作條件之下，對於故障電流、斷路器容量影響，並與實際情形作比較分析。

　This thesis analyzes dynamic and steady-state performance of wind induction generators connecting to a utility grid. Both single and four grid-connected wind induction generators are employed as the studied system model. A d-q axis equivalent-circuit model is employed to establish the wind, wind turbine, induction generators, and transmission lines to derive the complete dynamic equations of the studied system under three-phase balanced loading conditions. Both eigenvalues and nonlinear model simulations are employed to determine the dynamic stability of the studied system. The wind velocity, blade inertia, extra rotor resistance, capacitance to improve power factor, grid voltage, and transmission line of the studied system under steady-state conditions are also examined. Dynamic characteristics of the studied wind induction generators subject to disturbance and faulted conditions are explored. Finally, the equivalent circuit of the studied system is utilized to analyze the fault current and circuit-breaker capacity under different operating conditions and the simulated results are also compared with actual results.

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