摘要
本論文根據行政院原子能委員會核能研究所，(以下簡稱核研所)建置之微電網測試環境，開發一套適用於多區域微電網的故障檢出流程，並透過人工故障試驗，測試本故障檢出流程之可行性。 本研究亦進行人工故障試驗，依據試驗結果，評估本故障檢出流程的有效性。在提出本故障檢出流程之前，本文首先針對多區域微電網特性加以探討，根據這些特性訂定本保護系統架構以及故障檢出流程的基本需求，包括：故障檢出必須在1.5 Cycle內完成，若故障電流最小為設備額定的2倍，可利用故障發生期內的低電壓特性、幹線採用結合低電壓檢出方式的差流電驛，分路採用結合低電壓檢出方式的過流或方向性過流電驛，並規劃在幹線上之微電網分區之間設置高速斷路器。為配合微電網的分區可擴充性以及分散式電源、負載的可移動性，本故障檢出位準亦屬自動設定而不須人為調整之設計。此外，本研究亦已開發出幹線高速斷路器之控制電路。
並列摘要
In this study, the microgrid installed at the institute of Nuclear Energy Research (INER) is based on for the development of a multi-zone microgrid fault detection algorithm and the testing of this algorithm. The test is alone by conducting at the INER microgrid. For the development of a multi-zone microgrid protection system, the inside characteristics have been investigated on the INER microgrid, which result in the following protection system design and fault detection algorithm features: the fault detection time required must be within 1.5 cycle; the fault current is so low as to less than 2 times of the power source rating; the low voltage of faulted power system can be made use of for the detection of fault; the current differential combined with the under voltage relay is selected for the trunck line protection and the overcurrent or directional overcurrent combined with under voltage relay can be selected for the lateral protection. One key element of the planning of protection system is the installation of high-speed circuit-breaker (HSCB) at the boundary between any two of the multiple zone is the microgrid, for which the HSCB control circuit is designed in the study. Furthermore, the threshold for detection of fault can be set automatically, not manually, so to fit with the scalability and interoperability requirement of microgrid. Stage fault tests are conducted and the effectiveness on fault detection of the designed algorithm is evaluated.