大型电动机高阻抗差动保护稳定校验研究  

Study on stability check of high impedance differential protection for large motors

作　　者：陈景荣 邱立伟 万玉晶 李建[2] 张榆[2] 潘荣超[2] 刘念[2] 

机构地区：[1]中核核电运行管理有限公司,浙江海盐314300 [2]四川大学电气信息学院,成都610065

出　　处：《电测与仪表》2015年第1期101-105,共5页Electrical Measurement & Instrumentation

摘　　要：针对核电站大型电动机保护问题,提出了一种大型电动机高阻抗差动保护的稳定校验方法,并分析了电流互感器的励磁拐点、匝数比误差、回路电缆电阻等对高阻抗差动保护的影响。文中还介绍了大型电动机高阻抗差动保护的稳定校验测试方法,并对实际大型电动机进行测试。通过动模试验,完成了对保护整定核算评估的验证,并对试验数据进行分析处理,最后得出动模试验测试结果。For the problem of large motor protection in nuclear station, the stability check method of high impedance differential protection for large motors is presented. The effect of current transformer （CT） excitation inflection point, CT turns ratio error and CT loop cable resistance on the high impedance differential protection of large motors is ana- lyzed. The test method of stability check for the high impedance differential protection is also introduced, which is then tested on the actual large motor. The evaluation of protection setting calculation is verified according to the actual motor dynamic simulation test. At last, the test result is obtained with test data analysis.

关 键 词：大型电动机 高阻差动保护 稳定校验 

分 类 号：TM20[一般工业技术—材料科学与工程]