本論文係以高壓直流傳輸系統連接於兩電網間以及連接於一個整合大型離岸式風場與海流場和岸上電網間，利用此兩種架構研究高壓直流傳輸系統對功率潮流、穩定度以及動態響應之影響。本論文在三相平衡系統之條件下，採用交直軸等效電路模型來建立系統之數學模型，並以極點安置法設計高壓直流傳輸系統之比例-積分-微分型阻尼控制器。
本論文利用頻域之特徵値分析法及時域動態模擬來驗證高壓直流傳輸系統與控制器之效能。由模擬結果顯示，高壓直流傳輸系統能夠有效地控制系統功率潮流以及改善系統於不同干擾下之動態響應。

This thesis presents the analyzed results of power flow, stability, steady-state characteristics, and dynamic performance of a high-voltage direct current (HVDC) transmission system connected between two power systems as well as between an integrated hybrid large-scale offshore wind farm and marine-current farm and a power grid. Under three-phase balanced loading conditions, the q-d axis equivalent-circuit model is developed to establish the complete system models, and a proportional-integral-derivative (PID) damping controller of the HVDC system is designed using pole-assignment approach based on modal control theory.
For demonstrating the performance of the proposed HVDC joined with the designed damping controller, frequency-domain results based on eigenvalue analysis as well as time-domain simulations under disturbance conditions are both performed. It can be concluded from the simulation results that the proposed HVDC combined with the designed damping controller is capable of controlling power flow and improving the performance of the studied two power systems and the integrated hybrid system under disturbance conditions.

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