本論文研究大型離岸風場連接配置在海上平台的一套由全釩氧化還原液流電池以及超級電容器所組成的混合式儲能系統後，透過海上平台上的模組化多階轉換器與高壓直流傳輸系統將電力高效且穩定地傳輸至陸上之四機雙區域多機電力系統之穩定度改善分析。為進一步提升系統的穩定性與響應性能，本論文使用模態控制理論對模組化多階轉換器設計一組輔助阻尼控制器，即比例-積分-微分控制器，並引入灰狼優化算法來更新此控制器的三個重要參數來進一步優化控制器的性能。在穩態線性分析及小訊號穩定度方面，分別對所研究系統的不同案例進行比較；於動態與暫態研究方面，加入實際海上風速變動與不同干擾下進行模擬，以比較系統在不同案例情況下之穩定度。

This thesis investigates the integration of a hybrid energy storage system, composed of a vanadium redox flow battery and a supercapacitor, connected to a large-scale offshore wind farm via an offshore platform (OP). Using a modular multilevel converter (MMC) installed on the OP and a high-voltage direct-current link, electric power is transmitted efficiently and stably to a multimachine power system on land for stability enhancement analysis. To further improve system stability and dynamic performance, a supplementary damping controller (SDC) based on modal control theory is designed for the MMC. This SDC adopts a proportional-integral-derivative (PID) structure, and the grey wolf optimizer (GWO) algorithm is introduced to tune the SDC’s three key parameters to optimize its performance. In terms of steady-state linear analysis and small-signal stability, different case studies are compared. For dynamic and transient studies, actual offshore wind speed variations and various disturbances are introduced in simulations to evaluate and compare the system’s stability under different scenarios.

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