复杂和应涌流及其对电流差动保护的影响  

Complex Sympathetic Inrush and Its Influence on Current Differential Protection

作　　者：王奕[1] 戚宣威[2,3] 罗航[1] 尹项根[2,3] 张健[1] 张哲[2,3] 

机构地区：[1]广东电网公司电力科学研究院,广东省广州市510800 [2]电力安全与高效湖北省重点实验室,华中科技大学,湖北省武汉市430074 [3]强电磁工程与新技术国家重点实验室,华中科技大学,湖北省武汉市430074

出　　处：《电力系统自动化》2014年第6期98-105,共8页Automation of Electric Power Systems

基　　金：中国南方电网公司科技项目(K-GD2012-324)~~

摘　　要：目前大多数和应涌流机理分析采用运行变压器空载模型,对运行变压器非空载情况下的复杂和应涌流研究较为有限。文中推导了当一台变压器空投、另一台变压器非空载运行时,变压器磁链、电源电流以及运行变压器负载电流的解析表达式,分析了复杂和应涌流的影响因素、关键特征以及对相邻发电机电流差动保护的影响。数字仿真、动模试验以及现场录波数据验证了分析结论的正确性。Currently the analysis of sympathetic inrush mechanism is usually based on no-load operating transformers. The complex sympathetic inrush when a transformer operates with load is studied less often. The analytical expressions for the transformers flux linkages, the source and load current, when one no load transformer is energized and the other is operating with load, are derived to obtain the influencing factors and key characteristics of the complex sympathetic inrush. Besides, the impact of sympathetic inrush on the current differential protection for generators is analyzed. Digital simulation, dynamic simulation test, and the on-site recorded data have proved the validity.

关 键 词：变压器 和应涌流 励磁涌流 电流差动保护 电流互感器 

分 类 号：TM772[电气工程—电力系统及自动化]