摘要
介绍了真空断路器断开空载变压器产生截流过电压的过程,在已知变压器空载试验和短路试验参数情况下,通过一种估算变压器内部电容的方法求得电容,利用ATP-EMTP仿真软件搭建断路器对空载变压器的开断模型,得到仿真图,通过理论计算对断路器开断空载变压器所得电压、过电压倍数以及频率进行计算,并与实际仿真所得数据进行对比,验证仿真数据的正确性。这为抑制截流过电压所造成的危害提供了参考,并且对于研究剩磁受开关截流特性的影响提供了基础。
This paper introduced the process of disconnecting the no-load transformer by vacuum circuit breaker,and obtained the capacitance under the condition of the actual transformer no-load test and short-circuit test parameters and by the method of estimating the internal capacitance of the transformer. Using the simulation software ATP-EMTP,the breaking model of the no-load transformer is constructed by the circuit breaker,and the simulation diagram is obtained. The voltage,overvoltage multiple and frequency obtained by breaking the no-load transformer are calculated theoretically and compared with the actual simulation data to verify the correctness of the simulation data, and the corresponding conclusions are obtained according to the obtained simulation data. By verifying the correctness of the simulation model,it provides a reference for suppressing the damage caused by the interception overvoltage,and provides a basis for studying the influence of residual magnetism on the cutoff characteristics of the switch.
作者
侯春光
龙海旭
曹云东
宋云东
HOU Chunguang;LONG Haixu;CAO Yundong;SONG Yundong(Institute of Electrical Apparatus Technology and Application,Shenyang University of Technology,Shenyang 110870,China;Electric Power Research Institute,State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China)
出处
《电器与能效管理技术》
2019年第9期6-11,共6页
Electrical & Energy Management Technology
基金
国网辽宁省电力有限公司科技项目(2017YF-43)
