低压无功补偿接线方式对配电变压器防雷性能的影响分析  

Analysis on Influence of Low Voltage Reactive Power Compensation Wiring Mode on Lightning Protection Performance of Distribution Transformer

作　　者：高鸿鹏 咸日常[1] 吕东飞 孙晓维 范慧芳 陈蕾 GAO Hongpeng;XIAN Richang;LYU Dongfei;SUN Xiaowei;FAN Huifang;CHEN Lei(School of Electrical and Electronic Engineering of Shandong University of Technology,Shandong Zibo 255000,China;State Grid Shandong Electric Power Company Zibo Power Supply Company,Shandong Zibo 255000,China;Shandong Naigao Power Equipment Co.,Ltd.,Shandong Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]国网山东省电力公司淄博供电公司,山东淄博255000 [3]山东耐高电力器材有限公司,山东淄博255000

出　　处：《电力电容器与无功补偿》2022年第4期15-20,共6页Power Capacitor & Reactive Power Compensation

基　　金：国家“十三五”重点研发计划(2016YFB0901303)。

摘　　要：配电变压器面向终端电力用户,其运行状态直接影响供电可靠性,目前许多地区仅在配电变压器的高压侧装设避雷器,导致其在实际运行中因雷击造成的绝缘损坏事故时有发生。为降低线损、提高电压质量,通常在配电变压器的低压侧安装并联电容器进行无功补偿,而电容器接线方式会对配电变压器防雷性能具有一定程度影响。本文通过建立接有补偿电容的配电变压器宽频等效模型,首次就低压并联电容器接线方式对配电变压器防雷性能的影响差异进行仿真分析,仿真结果表明,低压电容器的接线方式对配电变压器防雷性能影响较大,其中Y接线方式具有良好的防雷效果。Distribution transformers are oriented towards the end power users,and its operation status directly affects power supply reliability.At present,in many areas,the lightning arresters are installed only at the high⁃voltage side of the distribution transformers,which leads to occurrence of insulation damage due to lightning strike during the actual operation.In order to reduce line loss and improve voltage quality,the shunt capacitors are usually installed at the low voltage side of distribution transformer for reactive power compensation.However,the wiring mode of capacitor will affect the lightning protection performance of distribution transformer to a certain extent.In this paper,the difference of influence of wiring mode of low voltage shunt capacitor on the lightning protection performance of distribution transformer is simulated and analyzed for the first time by establishing broadband equivalent model of distribution transformer with compensation capacitors.The simulation results show that wiring mode of the low⁃voltage capacitor has greater impacts on the lightning protection performance of distribution transformers,in which Y wiring mode has a good lightning protection effect.

关 键 词：低压无功补偿 接线方式 配电变压器 等效模型 防雷性能 分析 

分 类 号：TM86[电气工程—高电压与绝缘技术] TM421