本論文係以聚集等效離岸式風場與海流場經由傳輸線與市電並聯運轉，並比較該系統含與不含飛輪儲能系統之穩態及動態模擬結果。本論文於三相平衡系統下利用交直軸等效電路模型，分別建立離岸式風場、海流場以及飛輪儲能系統等模型，並利用極點安置法針對飛輪儲能系統設計採用不同回授訊號之比例-積分-微分控制器。本論文於穩態特性方面，分析不同風速、流速及電網電壓等情況下對系統特性之影響，在動態模擬方面，完成了風速變動、轉矩干擾以及市電端三相短路故障等模擬結果。經由穩態及動態之模擬的結果得知，當所研究之系統中加入飛輪儲能系統及阻尼控制器後，可控制系統功率潮流以及有效改善系統於不同干擾下之穩定度特性。

Both steady-state and dynamic analysis results of an equivalent aggregated hybrid offshore wind farm and marine-current farm connected to utility grid through a transmission line are presented in this thesis. A flywheel energy-storage system (FESS) connected to the common AC bus of the studied system is proposed to control the power flow and enhance stability. The q-d axis equivalent-circuit model is developed to establish the models for offshore wind farm, marine-current farm, and the FESS under three-phase balanced loading conditions. A proportional-integral- derivative (PID) type damping controller using different feedback signals is designed for the FESS using pole-assignment approach based on modal control theory. Steady-state characteristics of this studied system under different values of wind speed, marine-current speed, grid voltage, etc. are examined. Dynamic simulations of the studied system subject to various values of wind speed, torque disturbance, etc. as well as a three-phase fault are also carried out. It can be concluded from the simulation results that the proposed FESS joined with the designed PID damping controller can effectively control the power flow and improve the stability of the studied system under various disturbance conditions.

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