电网技术2017，Vol.41Issue(6)：2041-2046,6.DOI:10.13335/j.1000-3673.pst.2016.2218
特高压GIS现场雷电冲击试验电压台阶现象分析
Analysis of Step Phenomenon in LightningImpulse Test in UHVGIS
摘要
Abstract
With increase of voltage level, application of gas-insulated metal-enclosed switchgear (GIS) becomes more and more extensive. To ensure insulationreliability, itis necessary to carry out on-site voltage withstand and insulation test of GIS before puttinginto service. Lightning impulse voltage withstand test is one of tests which must be carried out onsite. However, it is found that there exist waveform distortion problems during field test, and so-called "step"phenomenon occursat rising edge of lightning impulse voltage. UsingATP-EMTPsoftware, a test system modelisbuiltto calculate voltage propagation in UHV GIS loadandanalyze reasons for occurrence of step phenomenon.Simulation results show that step phenomenon is caused by interaction between distribution characteristics of load andsurgeimpedance of different electrical processes. Negative voltage reflection generated by concentrated loads at high-voltage lead,branch bus nodesandbranch bus terminal is major reason causing"step" phenomenon.Amethodisproposedtodetermine wave front time of test voltage waveform with a "step"based on above research.关键词
气体绝缘金属封闭开关设备/大容量电力设备/标准雷电冲击电压/台阶现象/ATP-EMTP仿真Key words
gas-insulated metal-enclosed switchgear/power equipment with large capacitance/standard lightning impulse voltage/"step" phenomenon/ATP-EMTP simulation分类
信息技术与安全科学引用本文复制引用
刘轩东,张玲俐,王帅,文韬,张乔根..特高压GIS现场雷电冲击试验电压台阶现象分析[J].电网技术,2017,41(6):2041-2046,6.基金项目
国家电网公司科技项目(GYB17201400111 （）
SHJJGC1500189).Project Supported by Science andTechnology Foundation of State Grid Corporation of China(GYB17201400111 （）
SHJJGC1500189). （）
