微電網(Microgrid)系統為近年世界各國電力科技發展重點，微電網主要效益歸納為二：第一、由於再生能源為間歇性能源，大量的再生能源併入電網將造成電壓浮動的問題，影響區域電網供電穩定度，微電網具穩定電壓及頻率功能，可有效引入再生能源進入電網，提升區域電網再生能源之使用率；其次，微電網具有削峰填谷、尖峰用電調節(Peak Shaving)作用，可降低尖峰用電之系統設備需求規格及成本，配合時間電價制度，抑制用電行為，達到節能減碳之目的。本文除介紹微電網國際發展現況外，也逐一介紹微電網關鍵技術，包含微電網電力系統技術、能源電力電子技術、能源管理及智慧控制技術；最後介紹國內首座與台電高壓饋線併聯，並可接受台電調度及孤島運轉之龍潭微電網實證場域，以及實際運轉數據之探討。

Microgrid is currently the most promising technology, which gets the focus of national power technology development in many countries of the world. Two advantages of microgrid can be summarized. The first one is that microgrid is able to increase penetration of renewable energy into a regional grid, which means more efficient utilization of renewable energy can be achieved. The second one is to reduce carbon emission and carry out energy saving purpose due to the peak shaving technique of microgrid. This report not only describes the current research status of microgrid development around the world, but also illustrates the major core technology of a microgrid. Finally, Taiwan’s first outdoor microgrid demonstration site located in Longtan District of Taoyuan City is introduced. This microgrid is the first microgrid in Taiwan which is connected to TPC’s (Taipower Company) distribution feeder line and can be controlled to perform power dispatching or islanding operation by the TPC’s FDCC (Feeder Dispatch Control Center) located 20-km far away.