本文針對以變流器為基礎之分散式電源提出了一套控制策略與方法，使由其所組成之微電網能夠提供高品質的不斷電供電服務。本文所提出之控制方法能夠分別使微電網獨立地運轉在市電併聯與孤島運轉模式。同時，在兩種運轉模式的轉換過程中，區域負載能夠擁有高電力品質的模式轉換。另外，考慮以再生能源作為微電網內之分散式電源，在孤島運轉時，當因環境或負載切換等因素而導致輸入電源不足供應區域負載時，本文提出了功率補償的控制方法。藉由本文所提之功率補償方法，當某一台分散式再生能源不足供應區域負載時，不足額的功率能夠自其他分散式電源尋求補償以穩定整體之微電網系統。此外，本文提出了新式主動式孤島偵測方法以符合本文微電網之運轉操作。最後，本文分別以模擬及硬體電路實作的方式來驗證所提出之控制策略與微電網系統的可行性及有效性。

This thesis presents a novel control scheme of inverter used by distributed energy resources (DERs) systems for the microgrid to provide services with uninterrupted high-quality power supply. The proposed control scheme can be operated in both grid-connected and islanding modes. Also, it provides the ride through capability to microgrid local load without power interrupted during the transition between two modes. Additionally, taking renewable energy source as the distributed generation (DG) sources, the power unbalance between the maximum power point (MPP) of energy sources and loads is considered in this thesis. A new active islanding detection method is also proposed to consider the extreme conditions of the operation in the microgrid. Based on a down-scaled test system of the microgrid with multi-inverters, simulation and experimental results are provided to verify the feasibility and effectiveness of the proposed control scheme.

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