关键词：微电网分离的操作;分布式发电;仿真;电网
摘 要：The protective effect of isolated operation Mode on Micro-grid was studied in this paper employing the method of contrast analysis.A model of Micro-grid system powered by wind and hydro was built using Matab/Simulink to simulate the two modes of isolation and connection under the circumstance of public power grid fault.Results show that the isolated operation mode of micro-grid is effective and necessary.