本論文係針對以雙饋式感應發電機為基礎之離岸式風場與以永磁式同步發電機為基礎之離岸式風場做整合後，透過線間功率潮流控制器併聯至不同市電端之架構為研究目標，並比較此類混合離岸式風場採用線間功率潮流控制器之影響與穩定度改善之影響。本論文於三相平衡系統下利用交直軸等效電路模型，分別建立以雙饋式感應發電機為基礎之離岸式風場、以永磁式同步發電機為基礎之離岸式風場以及線間功率潮流控制器等模型，並利用極點安置法設計線間功率潮流控制器之比例-積分-微分阻尼控制器。本論文於穩態特性方面，分析風速及電網電壓變動等情況下對系統穩定度特性之影響。在暫態及動態模擬方面，完成了風速變動以及市電端發生三相短路故障等模擬結果。由穩態、動態及暫態之模擬結果分析得知，線間功率潮流控制器能夠有效地控制混合離岸式風場併聯至不同市電端之功率潮流以及加入比例-積分-微分阻尼控制器之後能改善該風場系統於不同干擾下之穩定度。

This thesis presents the analyzed results of power-flow control and stability improvement of an integrated doubly-fed induction generator (DFIG)-based offshore wind farm (OWF) and permanent-magnet synchronous generator (PMG)-based OWF connected to different grid terminals through an interline power flow controller (IPFC). The q-d axis equivalent-circuit model is used to establish the models of the studied DFIG-based OWF, the PMG-based OWF, and the IPFC under three-phase balanced loading conditions. A proportional-integral-derivative (PID) damping controller of the IPFC is designed by using pole-assignment approach based on modal control theory. Steady-state characteristics of the studied system under different values of wind speed and grid voltage are examined. Dynamic results and transient simulations of the studied system subject to a wind-speed disturbance and a three-phase fault at the power grid are also carried out. It can be concluded from the simulation results that the proposed IPFC joined with the designed PID damping controller is effective in controlling the power flow from OWFs to different grid terminals and improving the stability of the studied integrated OWF systems.

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