本論文提出基於模組化多階轉換器之混合再生能源系統連接至IEEE 14匯流排之多機電力系統，該混合再生能源是由基於雙饋式感應發電機之風場以及太陽能場共同連接至模組化多階轉換器。文中也提出了基於太陽能場電壓源換流器之電網形成的控制方案，俾降低電網跟隨控制缺乏慣性支持的影響。在穩態及小信號穩定度研究方面，分別對所研究系統的不同案例進行比較，並且比較所研究系統分別採用電網跟隨以及電網形成在不同案例下對於系統的效果，於動暫態研究方面，分析所研究系統在不同擾動條件下的模擬結果，並且比較所研究系統採用電網跟隨以及電網形成之效果，結果表明發生無論是在穩態或是在動暫態發生干擾時，採用電網形成之系統在混合再生能源側皆有較好的表現。

This thesis proposes a hybrid renewable energy system based on a modular multilevel converter connected to an IEEE 14-bus multi-machine power system. The hybrid renewable energy system consists of a wind farm based on doubly fed induction generators and a solar farm, both connected to the modular multilevel converter. The paper also presents a control scheme for grid-forming based on voltage-source inverter in the solar farm to mitigate the impact of the lack of inertial support in grid-following control. For steady-state and small-signal stability analysis, different cases of the studied system are compared, and the effects of employing grid-following and grid-forming strategies in different scenarios are evaluated. For dynamic and transient analysis, simulation results of the studied system under various disturbance conditions are analyzed, and the effects of employing grid-following versus grid-forming strategies are compared. The results indicate that the system using grid-forming control demonstrates better performance on the hybrid renewable energy side, both in steady-state and during dynamic transients when disturbances occur.

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