摘要
针对微电网具有短路电流小、潮流双向流动等特点,基于不同短路故障情况下微电源出口扰动电压量的特点,研究了适用于并网运行和孤岛运行模式下微电网侧基于扰动电压量的保护方法,可实现对微电网短路故障的类型判断,同时提出了微电网保护闭锁策略、与微电网相联的配电网侧基于通讯的单元级电流保护策略,运用电力系统计算机自动仿真软件仿真验证了所提出的微电网保护策略的可行性。
As to microgrid, its short-circuit current is low and its power flow is bidirectional. Based on the characteristics of the disturbance voltage at the micro power outlet in different situations of short circuit, this article has studied the protection method according to the microgrid disturbance voltage suitable for grid-connected and island operation. This method can also decide the type of microgrid short-circuit fault. Besides, this article puts forward the microgrid blocking protection strategy, and communications- based element current protection strategy of distribution network connected with microgrid. The computer automated simulation software used in electric power system has proved the feasibility of all the microgrid protection strategies proposed.
出处
《山西电力》
2013年第2期4-7,共4页
Shanxi Electric Power
关键词
分布式发电
微电网
故障检测
distributed generation
microgrid
fault detection
