一起雷击引起的变电站开关误动事故分析  

Analysis of a Misoperation Accident of Substation Switch Caused by Lightning Stroke

作　　者：姜珊珊 黄伟玲 JIANG Shanshan;HUANG Weiling(Maintenance Branch,State Grid Jiangsu Electric Power Co.,Ltd,Nantong 226006,China;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd,Shanghai 200092,China)

机构地区：[1]国网江苏省电力有限公司检修分公司,南通226006 [2]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《电力系统及其自动化学报》2020年第10期145-150,共6页Proceedings of the CSU-EPSA

基　　金：国家电网公司总部科技基金资助项目(52153218000B)。

摘　　要：雷击对电网的干扰严重影响电网的安全稳定运行,尤其是雷电进入变电站二次系统后会扩大故障影响范围。本文受到行波理论启发,提出了一种变电站地网中的能量传导模型。通过对江苏南通地区220 kV某变电站雷击跳合闸情况分析,建立了该变电站的雷电干扰传播理论模型,拟合了误动开关所在物理位置呈现出的规律,提出了雷击地区变电站的应对策略。最后通过对比雷击过程和直流传输的特点,探讨行波理论对直流电网研究的意义。The interference of lightning strike to power grid seriously affects its safe and stable operation.In particular,when lightning enters the secondary system of a substation,the scope of fault influences will be expanded.Inspired by the traveling wave theory,an energy conduction model in substation grounding network is proposed in this paper.Based on the analysis of lightning tripping and closing of one 220 kV substation in Nantong area of Jiangsu Province,a theoret⁃ical model of lightning interference propagation in this substation is established.The law for the physical position of the misoperation switch is fitted,and the corresponding strategy for substations in areas under lighting stroke is formulated.Finally,the significance of the traveling wave theory to the research on DC power grid is discussed by comparing the characteristics of lightning stroke process with those of DC transmission.

关 键 词：行波 雷击 接地消弧线圈 抗干扰 电容 

分 类 号：TM77[电气工程—电力系统及自动化]