本論文以水平軸式潮汐渦輪機分別驅動鼠籠式轉子感應發電機與永磁式同步發電機以做為無壩體式潮汐發電系統。本論文並提出兩種研究架構系統；系統架構一為單部鼠籠式轉子感應發電機分別做市電併聯及獨立供電；系統架構二為整合鼠籠式轉子感應發電機與永磁式同步發電機之離岸潮汐場經由傳輸線連接至電網，並採用靜態同步補償器改善系統穩定度。本論文於三相平衡系統條件下，採用交直軸等效電路模型以建立整體系統之數學模型，並利用留數法設計超前-落後型式之阻尼控制器，以比較其對系統穩定度之改善特性。本論文於穩態方面，分析潮汐場在不同工作條件下，系統之運作特性與頻域特徵值；在動態及暫態方面，完成潮汐流速變動、轉矩干擾及三相短路等模擬結果。由模擬結果分析得知，加入靜態同步補償器及阻尼控制器於所研究之系統，可有效改善系統遭受干擾時之穩定度特性。

This thesis employs a squirrel-cage induction generator (SCIG) and a permanent-magnet synchronous generator (PMSG) respectively driven by a horizontal-axis tidal turbine to constitute a tidal power generation system. The thesis presents the stability analysis of two system configurations. System configuration 1 is an SCIG-based tidal turbine generation system connected to a power grid and fed to an isolated load, respectively. System configuration 2 is a hybrid SCIG-based and PMSG-based offshore tidal farm fed to a power grid using a static synchronous compensator (STATCOM). The q-d axis equivalent-circuit model is derived to establish the complete system model under three-phase balanced conditions. A damping controller of lead-lag type of the proposed STATCOM is designed by using residue method, and the performance of the studied system with and without the designed controller is also compared. Steady-state operating characteristics and eigenvalue variations of the studied system under different operating conditions are performed. Dynamic and transient simulations of the studied system subjected to a tidal-speed disturbance, a torque disturbance, and a three-phase short circuit fault at the power system are also carried out. It can be concluded from the simulation results that the proposed STATCOM joined with the designed controller can effectively improve the stability of the studied system.

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