本論文係研究採用靜態同步補償器之控制器結合基於全釩氧化還原液流電池之儲能系統，來抑制混合蒸汽渦輪機以及風力渦輪機發電系統之次同步共振現象。本論文於三相平衡下，利用直-交軸等效電路建立系統模型，包含：同步發電機、基於雙饋式感應發電機之離岸式風場、靜態同步補償器以及基於全釩氧化還原液流電池之儲能系統等模型，並利用極點安置法設計靜態同步補償控制器之比例-積分-微分阻尼控制器。在系統小訊號穩定度方面，針對傳輸線路之串聯補償比、同步發電機之輸出實功率、端電壓、功率因數及基於全釩氧化還原液流電池之儲能系統容量變動等工作點變化之頻域特徵值分析；在系統動態與暫態模擬分析方面，完成轉矩干擾、風速變動及三相短路故障等模擬結果。由系統小訊號穩定度、動態及暫態模擬結果可以得知，當加入靜態同步補償控制器結合比例-積分-微分阻尼控制器後，能使所研究系統恢復至穩定，並有效抑制系統次同步共振現象。

This thesis presents a study on the suppression of subsynchronous resonance (SSR) in a hybrid steam-turbine generator and offshore wind farm (OWF) using a static synchronous compensator (STATCOM) joined with a vanadium redox flow battery (VRFB)-based energy storage system (ESS). The research is conducted under balanced three-phase condition using a d-q axis equivalent-circuit model including synchronous generators, a doubly-fed induction generator (DFIG)-based OWF, STATCOM, VRFB-based ESS, and other system models. A proportional-integral-derivative (PID) damping controller for the STATCOM is designed using a pole-assignment approach based on modal control theory. The study includes small-signal stability analysis and transient simulation results of the studied system. The simulation results demonstrate that the proposed STATCOM joined with the designed PID damping controller is effective in suppressing SSR in the investigated power system.

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