高电压技术2017，Vol.43Issue(3)：960-965,6.DOI:10.13336/j.1003-6520.hve.20170303037
变电站开关瞬态干扰建模与特性分析
Modeling and Characteristic Analysis of Switching Transient Disturbance in Substation
摘要
Abstract
The transient electromagnetic field generated by isolation switch's operation is one of the important sources of electromagnetic interference in substation.To evaluate the level of electromagnetic disturbance at the primary side of the transformer,we analyzed the electromagnetic transient process.Then,we established models of distributed parameter in bus and models of switching arc's extinguishing and restriking.Based on these models,numerical calculations of power network model under the operation mode of single-phase transformer and single circuit line were conducted,and characteristics of over-voltage and over-current were evaluated synthetically.The simulation results demonstrate that the bus current is composed of a series of cone-shaped damped oscillatory waves,the maximum voltage to ground among jump waves between isolation switch and circuit breaker is 586.2 kV,and the disturbance voltage conducted to transformer decreases to 514.4 kV,which will not cause insulation breakdown of main transformer.Moreover,interference signal's frequency is determined by the length of the bus and the short line,and is limited in the range of 32.87 MHz.关键词
开关操作/电磁骚扰/分布参数/电弧重燃/过电压/衰减振荡波Key words
switching operation/electromagnetic disturbance/distributed parameter/arc restriking/over-voltage/damped oscillatory waves引用本文复制引用
王立辉,钱佳斌,嵇建飞,卜强生,袁宇波..变电站开关瞬态干扰建模与特性分析[J].高电压技术,2017,43(3):960-965,6.基金项目
国家自然科学基金(51477028) （51477028）
江苏省自然科学基金(BK20130099) （BK20130099）
国家电网公司科技项目(B71-16-008).Project supported by National Natural Science Foundation of China (51477028),Natural Science Foundation of Jiangsu Province (BK20130099),Science and Technology Project of SGCC (JB71-16-008). （B71-16-008）
