张郅昂 孙佳 肖傲 王珏
摘 要:随着电力事业的蓬勃发展,电力设备也在逐步换代、升级。在盖州220kV变电站所运行的GW16-220Ⅰ型隔离开关静触头出现下垂现象,导致动触头对静触头杆的夹紧位置改变,夹紧力减少使隔离开关动静触头间接触电阻增大,已经满足不了所规定的技术参数要求,影响了隔离开关的稳定运行及可靠供电。为了提高GW16-220Ⅰ型隔离开关的运行可靠性,解决静触头杆的下垂问题,故对GW16-220Ⅰ型隔离开关静触头进行初步改造。
关键词:GW16-220Ⅰ型隔离开关;静触头;接触电阻
中图分类号:TM564 文献标识码:A 文章编号:1003-5168(2018)04-0140-02
Study on Static Contact Reformation of GW16-220 Type I Disconnector
ZHANG Zhiang 1 SUN Jia 1 XIAO Ao2 WANG Jue 3
(1.Yingkou Power Supply Company, State Grid Liaoning Electric Power Supply Co., Ltd.,Yingkou Liaoning 115000;
2. Skill Training Center of State Grid Liaoning Electric Power Supply Co., Ltd.,Jinzhou Liaoning 121000;3. Tongliao Power Supply Company, State Grid East Inner Mongolia Electric Power Company Limited,Tongliao Inner Mongolia 028000)
Abstract: With the vigorous development of electric power industry , the power equipment is gradually converted and upgraded . The static contact of GW16 - 220 I isolated switch operating in 220 kV substation in Gaizhou is caused by droop , which causes the contact resistance between the moving contact and the static contact rod to increase , which has affected the stable operation and reliable power supply of the isolating switch . In order to improve the operation reliability of the GW16 - 220 I isolation switch , to solve the problem of droop of the static contact rod , the static contact of the GW16 - 220 I isolation switch is preliminarily reformed .
Keywords: GW16 - 220 I isolation switch ;static contact ;contact resistance
1 研究背景
额定电压在1kV以上的隔离开关即为高压隔离开关。较断路器相比,隔离开关没有灭弧功能,在无载流时可以分合高压电气设备和电路,配合相应断路器可以完成倒闸操作。合闸状态的隔离开关能够导电并输送电能,分闸状态则可以起到安全隔离的效果。在变电站的正常运行、倒闸操作和变电检修中起重要作用,而且运行数量较多,其质量优劣直接影响系统的安全运行[1]。高压隔离开关是重要的变电一次设备,其工况直接影响电力系统的安全可靠性[2]。随着电力网的不断发展,隔离开关逐渐趋于多样化,无论型号还是结构、功能都可以适应不同区域不同变电站的要求,对维护工作的要求也越来越高。维护作业中发现盖州220kV变电站使用的GW16-220Ⅰ型隔离开关静触头出现下垂现象,导致动触头对静触头杆的夹紧位置改变,夹紧力减少使隔离开关动静触头间接触电阻增大,无法满足技术参数要求,影响了隔离开关的稳定运行及可靠供电。……