有载分接开关瓦斯继电器动作特性试验研究  

Study on Operation Characteristics Test of Gas Relay with On⁃load Tap Changer

作　　者：丁国成 杨海涛 李博宇 吴兴旺 胡啸宇 吴杰 DING Guocheng;YANG Haitao;LI Boyu;WU Xingwang;HU Xiaoyu;WU Jie(Electric Power Research Institute,State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China;Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院,合肥230022 [2]西安交通大学,西安710049

出　　处：《高压电器》2023年第4期156-161,共6页High Voltage Apparatus

基　　金：国家电网有限公司项目(52120518000U)。

摘　　要：近年来,在工程现场中出现过多起正常切换导致有载分接开关瓦斯保护误动的事件,而其误动基理尚不明确。为了探究其误动原因,搭建了基于2XCMDI-1000/126C-10193W型有载分接开关的瓦斯继电器动作特性研究实验平台,并通过空气压缩机注压的方式在油箱内部模拟不同的工况,对不同种类的瓦斯继电器在各种压强、油流速环境下的动作特性进行了大量实验。实验结果表明:随着压力源压力值增大,有载分接开关所用挡板式瓦斯继电器动作时刻对应的油流速有逐渐减小的趋势,而油流加速度则逐渐增大。分析认为,瓦斯继电器中挡板动作是油流速对应的“动压力”与绝缘油液体中“静压力”共同作用的结果。文中研究结果解释了在油流速未达到整定值的情况下有载分接开关的瓦斯保护发生误动的原因,为有载分接开关瓦斯继电器整定值的设置以及校验提供了一定的理论及实验基础。In recent years,there were many accidents of gas protection misoperation caused by normal switching of on⁃load tap changer.In order to explore the cause of misoperation,the experimental platform for the study of gas re⁃lay action characteristics was built based on 2XCMDI-1000/126C-10193W on⁃load tap changer.Different working conditions were made inside the tank by means of pressure injection by the air compressor,and the operation charac⁃teristics of different types of gas relay under various pressure and oil⁃flow conditions were tested.By comparing and analyzing the experimental results,it is found that with the increase of the pressure value of the pressure source,the oil⁃flow velocity corresponding to the action time of the baffle⁃type gas relay used in the on⁃load tap changer has a gradually decreasing trend,while the oil⁃flow acceleration increases gradually.Based on the theory of fluid mechan⁃ics,it is considered that the action of baffle in gas relay is the result of the combined action of“dynamic pressure”corresponding to oil velocity and“static pressure”in insulating oil liquid.This also partly explains that the gas pro⁃tection of on⁃load tap changer misoperates when the oil⁃flow velocity does not reach the setting value.

关 键 词：有载分接开关 瓦斯继电器 油流速 压强 

分 类 号：TM586[电气工程—电器] TM403.4