电力系统常用GW4型隔离开关热故障及处理
2018-09-13刘淑琼曾祥胜陶丽芬
刘淑琼 曾祥胜 陶丽芬
摘 要:在电力系统中,隔离开关是不可或缺的一部分,但是多年的运行经验中,经常出现隔离开关发热而形成的缺陷,进而造成全站内的停电的情况,如变电站的6kV~110kV断路器、隔离开关、电流互感器、电压互感器、电容器、电抗器等设备的维修、维护、大修和技改等工作一般会安排在计划停电时执行,然而大部分情况下,隔离开关出现的问题比较多,常见的问题就是发热比较严重,为了更好处理此类型的缺陷,文章针对隔离开关在正常运行的情况下,出现的各种不利条件,以及常见的故障类型情况进行总结,并提出了相关的检修防范措施,对实践工作具有一定的参考意义。
关键词:隔离开关;发热;维修
中图分类号:TM564.1 文献标志码:A 文章编号:2095-2945(2018)23-0149-02
Abstract: In the power system, disconnector is an indispensable part, but in many years of operation experience, the disconnector often has the defect caused by heat, which leads to the blackout in the whole station. For example, the repair, maintenance, overhaul and technical renovation of equipment such as 6 kV circuit breakers, disconnectors, current transformers, voltage transformers, capacitors and reactors in substations are generally scheduled to be carried out during planned blackouts, however, in most cases, In order to deal with this kind of defect better, the article aims at the various disadvantageous conditions which appear under the normal operation condition of the isolating switch, the common problem is that the heat is more serious, in order to better deal with this kind of defect, the paper points out that the disconnector has many disadvantages under normal operation. The common fault types are summarized, and the relevant preventive measures are put forward, which has a certain reference significance to the practical work.
Keywords: disconnector; heating; maintenance
引言
隔離开关又称刀闸,是十分重要的电力设备,在电网中得到大量应用,主要起电气隔离、改变运行方式及接通或断开小电流电路的作用,其运行情况严重的会影响电网的安全运行。
本文结合某供电公司隔离开关使用情况,主要对GW4隔离开关发热原因进行了简单的分析,并针对这些原因给出了处理方法及预防措施。
1 隔离开关概述
GW4系列隔离开关为双柱水平三极联动式,也可以单极使用,主要由底座、瓷瓶和导电部分等组成,每极有两个实心棒式绝缘支柱,分别装在底座两端的轴承座上,此种设备主要是采用交叉连杆连接方式,导电闸刀分成两段,分别固定在两个绝缘支柱的顶端,这样即可以实现两个刀闸口相互转动;……
