干式铁芯电抗器匝间短路故障检测与定位方法  

Research on the Detection and Location Method of Turn Short Circuit Fault of Dry-type Iron Core Reactor

作　　者：马志钦 王守明 杨贤 蔡玲珑 朱东柏[2] MA Zhi-qin;WANG Shou-ming;YANG Xian;CAI Ling-long;ZHU Dong-bai(Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510600, China;School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080)

机构地区：[1]广东电网有限责任公司电力科学研究院,广州510080 [2]哈尔滨理工大学电气与电子工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2020年第6期63-69,共7页Journal of Harbin University of Science and Technology

基　　金：国家重点研发计划项目(2017YFB0902705);广东电网有限责任公司项目(GDKJXM20162143).

摘　　要：针对现有匝绝缘检测方法无法解决铁心电抗器匝间耐压试验问题,提出了基于变频谐振技术铁心电抗器匝间绝缘检测手段及匝间短路故障定位方法。该方法利用高压补偿电容器与试品电抗器串联,通过调节变频装置输出频率使电抗器线圈发生谐振,提高电抗器匝间耐受电压达到匝绝缘考核目的。通过仿真与理论推导对试验回路方案、匝间短路电流估算进行详细分析,得出匝间短路会导致回路幅频特性出现明显电压失谐特征,并以此作为铁芯电抗器匝绝缘缺陷检测判据。同时,提出一种检测铁芯电抗器线圈周围磁场变化量的匝绝缘缺陷位置检测的方法,通过磁场分布仿真模型验证了缺陷定位可行性。To solve the problem of turn to turn withstand voltage test of existing iron core reactor,this paper proposes the turn to turn insulation detection method and short circuit fault location method based on frequency conversion resonance technology.In this method,the high-voltage compensation capacitor is connected in series with the reactor of the test object,and the resonance occurs in the reactor coil by adjusting the output frequency of the varied frequency converter,so as to improve the turn to turn withstand voltage of the reactor and achieve the purpose of turn insulation assessment.Through simulation and theoretical derivation,the test circuit scheme and the estimation of turn to turn short circuit current are analyzed in detail,and it is concluded that the turn to turn short circuit will cause obvious voltage detuning in the amplitude frequency characteristics of the circuit,which is used as the detection criterion of turn insulation defects in iron core reactors.At the same time,a method of detecting the defect position of turn insulation by detecting the magnetic field variation around the core reactor coil is proposed.The feasibility of defect location is verified by the simulation model of magnetic field distribution.

关 键 词：铁芯电抗器 匝绝缘 变频谐振 缺陷定位 

分 类 号：TM47[电气工程—电器]