变电站35kV系统小电阻接地技术研究及应用分析  

Research and Application Analysis of Low Resistance Grounding Technology for 35kV Substation System

作　　者：张强 孙兆成 王东 ZHANG Qiang;SUN Zhao-cheng;WANG Dong(Ultra High Voltage Company of State Grid Ningxia Electric Power Co.,Ltd,Yinchuan 750011 China)

机构地区：[1]国网宁夏电力有限公司超高压公司,宁夏银川750011

出　　处：《科技创新与生产力》2022年第11期130-133,共4页Sci-tech Innovation and Productivity

摘　　要：随着国民经济的不断发展,人们对电力需求规模不断扩大,低压电缆线路数量不断增多,产生的容性电流快速增大,35 k V系统不接地或经消弧线圈接地方式容易造成电网设备损坏和人员伤害。为了解决这一问题,本文研究了因此在变电站35 k V及以下系统中被广泛应用的中性点经小电阻接地方式,阐述了小电阻接地方式改造的紧迫性和必要性,结合中卫330 k V变电站改造应用实例情况,探讨了改造后的运行方式及改造注意事项。With the continuous development of the national economy, the scale of people’s demand for power is expanding,the number of low-voltage cable lines is increasing, and the capacitive current generated is rapidly increasing. The 35 k V system is not grounded or grounded through arc suppression coil, which is easy to cause damage to power grid equipment and personnel injury. In order to solve this problem, this paper studies the neutral point grounding mode through low resistance which is widely used in 35 k V and below substation systems, expounds the urgency and necessity of the transformation of the low resistance grounding mode, and discusses the operation mode after the transformation and the matters needing attention in combination with the application case of Zhongwei 330 k V substation transformation.

关 键 词：小电阻接地 消弧线圈接地 容性电流 35kV系统接地方式 

分 类 号：TM63[电气工程—电力系统及自动化] TM86