感性负载启动电流与短路电流的识别  

Recognition of Startup Current and Short-circuit Current of Inductive-Load

作　　者：王慈[1] 王增平[1] 徐岩[1] 卢雪峰[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定071003

出　　处：《电力科学与工程》2008年第1期15-18,共4页Electric Power Science and Engineering

摘　　要：对于感性负载,其启动时的功率因数较大,而短路时的功率因数几乎为零,两者相差较大。可利用启动电流和短路电流的这一特点来识别两者,以避免保护的误动。理论分析和仿真试验表明:本方法可以准确地识别感性负载的启动电流和短路电流,并且简单可行。For the inductive load, the power factor of the start current is comparatively large and that of the short circuit current is nearly equal to zero. Therefore, the starting current and short-circuit current can be distinguished using the characteristic mentioned so as to avoid the malfunctions of the protective devices. The results of theoretical analysis and simulative experiment showed that the method mentioned in paper can accurately distinguish the startup current and the short-circuit current and was simple to be implemented.

关 键 词：感性负载 启动电流 短路电流 有功功率 功率因数 

分 类 号：TM855[电气工程—高电压与绝缘技术]