利用故障方向信息的差动式微电网保护  

Research on differential protection for micro-grid using failure message with direction information

作　　者：周念成[1] 黄睿[1] 王睿晗[2] 冉彪 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]云南电网公司玉溪电力局,云南玉溪653100 [3]成都电力局,四川成都611130

出　　处：《重庆大学学报（自然科学版）》2012年第4期128-132,138,共6页Journal of Chongqing University

基　　金：重庆市自然科学基金资助项目(CSTC2009BB6190);输配电装备及系统安全与新技术国家重点实验室自主研究资助项目(2007DA10512709208)

摘　　要：针对传统的电流保护无法满足微电网保护的问题,提出了一种新型的微电网的系统保护方案。在该保护方案中,通过相邻保护单元之间互相交换带方向的故障信息,确定故障范围,快速动作清除故障。最后通过分析一个包含三条支路和两个基于逆变器的微电源的微电网在三种故障情况下保护的动作,验证了该方法能够达到快速动作切除故障以及在并网模式和孤岛模式中采用相同的保护策略的目的。Considering traditional current protection cannot satisfy the micro-grid, a sy.stem protection solution for the micro-grid is proposed. In this solution, the failure message with direction information can be exchanged among the adjacent protection units, so the fault coverage can be determined and the fault can be quickly cleared. By analyzing the movement of the protection in three kinds of fault conditions in the micro-grid that contains three branches and two micro-power based on inverter, the method has been proved that the fault can be quickly cleared and the protection has the same protection strategies for both islanded and grid-connected operation.

关 键 词：微电网 继电保护 微电源 故障信息 

分 类 号：TM571.6[电气工程—电器]