| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 93 === 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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