35 kV同塔四回架空线路不平衡度分析及相序布置优化  

Unbalance Degree Analysis and Phase Sequence Arrangement Optimization of 35 kV Four-Circuit Overhead Lines on the Same Tower

作　　者：陈家锋 蒙国勇 梁旭耀 杨健 CHEN Jiafeng;MENG Guoyong;LIANG Xuyao;YANG Jian(China Energy Engineering Group Guangxi Electric Power Design Institute Co.,Ltd.,Nanning 530007 China)

机构地区：[1]中国能源建设集团广西电力设计研究院有限公司,广西南宁530007

出　　处：《红水河》2025年第1期47-53,66,共8页

摘　　要：针对广西某光伏电站35 kV同塔四回并联架空线路零序保护跳闸问题,笔者运用基于卡松公式的近似计算方法,推导出同塔四回并联架空线路各序不平衡度简化计算公式,并将其与录波数据计算结果以及PSCAD/EMTDC软件仿真计算结果相互对比验证。通过分析不平衡电流的产生机理及影响因素,考虑各不平衡度的权重,提出基于层次分析法的相序布置优化方法。将该方法计算得出的优化相序布置方案应用于实际线路后,大幅降低了不平衡电流,成功解决了零序保护跳闸问题。In order to solve the problem of zero-sequence protection tripping of 35 kV four-circuit parallel overhead lines on the same tower in a photovoltaic power station in Guangxi the simplified calculation formula of each sequence unbalance degree of four-circuit parallel overhead lines on the same tower is derived by using the approximate calculation method based on Casson's formula and compared and verified them with the calculation results of wave recording data and PSCAD/EMTDC software simulation results.By analyzing the generation mechanism and influencing factors of unbalanced current considering the weight of each imbalance degree an optimization method of phase sequence arrangement based on analytic hierarchy process is proposed.The optimized phase sequence arrangement scheme calculated by this method is applied to the line which greatly reduces the unbalanced current and successfully solves the problem of zero sequence protection tripping.

关 键 词：不平衡度 相序布置 同塔四回架空线路 层次分析法 

分 类 号：TM75[电气工程—电力系统及自动化]