500 kV/220 kV同塔混压四回输电线路感应电压及电流的计算与测量分析  

Calculation and Measurement Analysis for Induced Voltage and Current of 500 kV/220 kV Mixed⁃voltage and Four⁃circuit Transmission Lines on the Same Tower

作　　者：徐党国 李亚美 黄诗洋 宁琳如 陈霄 王晨星 蔺涛 彭兆伟 XU Dangguo;LI Yamei;HUANG Shiyang;NING Linru;CHEN Xiao;WANG Chenxing;LIN Tao;PENG Zhaowei(State Grid Jibei Electric Power Co.,Ltd.Electric Power Science Research Institute,Beijing 100045,China;State Grid Jibei Electric Power Co.,Ltd.,Beijing 100031,China;Beijing Power Transmission and Transformation Co.,Ltd.,Beijing 102401,China)

机构地区：[1]国网冀北电力有限公司电力科学研究院,北京100045 [2]国网冀北电力有限公司,北京100031 [3]北京送变电有限公司,北京102401

出　　处：《高压电器》2025年第4期203-210,218,共9页High Voltage Apparatus

基　　金：国网冀北电力有限公司科技项目(52018K220018)。

摘　　要：同塔混压四回输电线路间距小、回路多、电压等级差异大,因而电磁耦合和静电感应作用更强。为了有效降低感应电水平应合理设计输电线路相序、布置方式及接地开关选型。文中以某500 kV/220 kV同塔混压四回输电工程为研究对象,基于ATP-EMTP软件构建仿真模型,研究了500 kV双回线路在运行方式、线路潮流、相序布置、分段接地多个因素交互作用下,对同塔220 kV双回线路感应电压与感应电流的影响规律;基于柔性电流传感技术,现场实际测量了220 kV双回线路感应电流,进一步分析与验证了计算模型的准确性。研究结果表明:500 kV双回线路潮流大小与同塔220 kV双回线路电磁感应电流呈正相关特性,而对静电感水平影响不大;同塔混压四回线路500 kV双回采用逆相序布置时,220 kV双回线路感应电水平将显著降低;分段挂接地线时,呈现靠近混压四回中间位置电磁感应电流值较小,两端交界处较大的趋势;经测量验证,感应电理论计算值较实际测量值偏大,这与仿真计算选取的参数有关,这为接地开关的选型预留了足够的安全裕度;提出了通过改变对端敞开式接地开关开合感应电水平的技术方案,以解决GIS中接地开关开合感应电能力不足的问题。研究结果可为同塔混压多回输电工程的设计、检修作业接地线选型和解决接地开关开合感应电能力不足的问题提供重要依据。The electromagnetic coupling and electrostatic induction action is very strong due to the small spacing,multiple circuits and large voltage level differences of the mixed⁃voltage and four⁃circuit transmission lines on the same tower.In order to effectively reduce the level of induced electricity,the phase sequence,layout and type selec⁃tion of earthing switch of the transmission line shall be reasonably designed.In this paper,a project of a 500 kV/220 kV mixed⁃voltage and four⁃circuit power transmission lines on the same tower is taken as the research object,the simulation model based on the ATP⁃EMTP software is set up,and the influence of the 500 kV double⁃circuit lines on the induced voltage and induced current of 220 kV double⁃circuit lines on the same tower under the interactions of such multiple factors as the operation mode,power flow of line,and phase sequence arrangement change is studied.Based on the flexible current sensing technology,the induced current of the 220 kV double⁃circuit lines is actually measured on site,and the accuracy of the calculation model is further analyzed and verified.The research results show that the magnitude of the power flow of 500 kV double circuit is positively correlated with the electromagnetic induced current of the 220 kV double⁃circuit lines on the same tower,but the influence on the static inductance level is less.In case of using the arrangement of inverse phase sequence of 500 kV double⁃circuit of the mixed⁃voltage and four⁃circuit on the same tower,the induced current level of the 220 kV double⁃circuit will be reduced significantly.While,in case of connection of the ground wire in sections,the electromagnetic induction current near the middle of the four⁃circuits of mixed⁃voltage is smaller and the junction of the two ends is larger.It has been verified by measure⁃ment that the the theoretical calculation value of the induced electricity is slighter larger than the actually measure value and this is related to the selected paramete

关 键 词：同塔混压四回 500 kV 感应电压 感应电流 接地开关 

分 类 号：TM726[电气工程—电力系统及自动化] TM75