高电压技术2017，Vol.43Issue(10)：3351-3360,10.DOI:10.13336/j.1003-6520.hve.20170925025
螺栓安装方式对动车组高压隔离开关电场分布与闪络特性的影响
Influence of Bolt Installation Method on Electric Field Distribution and Flashover Characteristics for Isolating Switch in Electric Multiple Units
摘要
Abstract
The installation method of high-voltage end bolts of high-voltage isolating switch for electric multiple units (EMU) impairs the electric field strength of the air domain in the vicinity of the bolts.In order to reduce local electric field intensity and improve the operation reliability of high-voltage insulator,it is of great importance to analyze the influences of bolt fix method on electric field distribution and select a reasonable bolt installation scheme.Consequently,we studied the optimization strategy of the bolts at high-voltage end for the high voltage isolation switch in EMU on the basis of the 3D drawing-commercial FEM co-simulation and artificial pollution flashover test.The 3D model was established to compare the variation trend of the potential and electric field distribution along the air surface or axial lines under different bolt installation methods.The effect of bolt end on the flashover discharge channel was verified by experiments in the artificial chamber.The results show that the existing bolt installation method is easy to form the discharge channel from bold end to the 1st insulator sheath edge,the optimized bolt connection method can effectively reduce the potential gradient of the local area and reduce the possibility of forming a discharge channel on the edge of insulator sheath,the results of this study can provide references for practical engineering applications.关键词
动车组/隔离开关/安装方式/电场强度分布/闪络特性/有限元仿真Key words
electric multiple units/isolating switch/installation method/electric field distribution/flashover characteristics/FEM引用本文复制引用
马建桥,律方成,汪佛池,陈小强,贾步超,刘鹏..螺栓安装方式对动车组高压隔离开关电场分布与闪络特性的影响[J].高电压技术,2017,43(10):3351-3360,10.基金项目
兰州交通大学青年科学基金(2017051).Project supported by the Youth Scientific Funds of Lanzhou Jiaotong University(2017051). （2017051）
