配电电抗器匝间短路测试研究  

Study on Inter-turn Short Circuit Test for Distribution Reactor

作　　者：丁伟 李原[2] 罗拥军 钱辉敏[2] DING Wei;LI Yuan;LUO Yongjun;QIAN Huimin(Jiangsu Anfor Power Technology Co.,Ltd.,Taizhou 225300,China;Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]江苏安方电力科技有限公司,江苏泰州225300 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074

出　　处：《电力电容器与无功补偿》2021年第5期48-53,共6页Power Capacitor & Reactive Power Compensation

摘　　要：匝间短路是电抗器运行中较常见的故障,鉴于目前对电抗器状态检修不足的现状,本文提出一种适用于配电电抗器匝间短路故障的在线监测方法。首先,搭建电抗器等效电路模型,获得电抗器电气参数计算方法;然后,搭建一套电抗器短路故障在线监测系统;最后,开展不同故障位置和故障程度下电抗器短路测试研究。研究结果表明,电抗器匝间短路的等效电抗和电阻变化率存在短路位置的对称性,中部变化率绝对值最大,两端变化率绝对值最小。随着短路故障的加深,等效电抗呈减小的趋势,减小的幅度有所增加;等效电阻呈增大的趋势,增大的幅度有所增加。该研究技术可实现配电电抗器匝间短路故障的有效监测。Inter-turn short circuit is a common fault of reactor in operation.In view of the insufficient maintenance state of reactor,a kind of on-line monitoring method which is suitable for inter-turn short circuit fault of distribution reactor is proposed in this paper.First,the equivalent circuit model of the reactor is set up to obtain calculation method of electrical parameters of the reactor.Then,a set of on-line monitoring system of short circuit fault is set up.Finally,the study of short-circuit test of reactor under different fault position and fault degree is carried out.The study results show that the variation rate of equivalent reactance and resistance of inter-turn short circuit of reactor has the symmetry of short circuit position,the absolute value of the variation rate in the middle is maximum and in both ends is minimum.With the deepening of short circuit fault,the equivalent reactance shows the trend of decrease and the decreased amplitude increases.The equivalent resistance shows the trend of increase and the increased amplitude increases.The study technology can achieve effective monitoring of inter-turn short circuit fault of distribution reactor.

关 键 词：配电电抗器 等效电抗 等效电阻 短路位置 短路程度 

分 类 号：TM47[电气工程—电器]