500 kV自耦变压器套管电流互感器极性校核方法研究  

Research on Polarity Checking Method for 500 kV Autotransformer Bushing TA

作　　者：张富超 杨红霞 芮建勋 张丽丽 张富春 ZHANG Fuchao;YANG Hongxia;RUI Jianxun;ZHANG Lili;ZHANG Fuchun(Hebei Power Transmission&Transformation Co.,Ltd.,Shijiazhuang 050051,China;State Grid Hebei Electric Power Co.,Ltd.,Shenze Power Supply Branch,Shijiazhuang 052560,China;Qinhuangdao Huayuan Electric Power Engineering Design Co.,Ltd.,Qinhuangdao 066000,China;State Grid Jibei Electric Power Co.,Ltd.,Qinhuangdao Power Supply Company,Qinhuangdao 066000,China)

机构地区：[1]河北省送变电有限公司,河北石家庄050051 [2]国网河北省电力有限公司深泽县供电分公司,河北石家庄052560 [3]秦皇岛华源电力工程设计有限公司,河北秦皇岛066000 [4]国网冀北电力有限公司秦皇岛供电公司,河北秦皇岛066000

出　　处：《山东电力技术》2021年第10期48-53,共6页Shandong Electric Power

摘　　要：变压器套管电流互感器(TA)极性校核试验是保证TA二次回路正确及相关保护正确动作的重要试验,对变压器的安全稳定运行具有重要影响。针对常规变压器套管TA极性校核试验的不足以及专门的试验装置操作复杂、投资大等问题,对干电池点极性方法进行改进,提出一种500 kV单相三绕组自耦变压器套管TA极性校核方法,该方法是在自耦变压器低压侧施加电压,将高压侧和中压侧短接接地,利用指针式万用表检验自耦变压器套管TA极性,并用于工程实际。工程实践表明:该方法安全可靠,经济高效。The polarity check test of transformer bushing TA is very important to ensure the correct of TA secondary circuit and related protection operation,which has an important impact on the safe and stable operation of the transformer.The point polarity method using dry cell was improved,and a method for checking the TA polarity of 500 kV single⁃phase three winding autotransformer bushing was proposed,which solves the shortcomings of conventional transformer bushing TA polarity checking test and the problems of complex operation and large investment of special test device.In this method,the voltage was applied to the low voltage side of the autotransformer,and the high voltage side and the medium voltage side were short circuited to ground.The TA polarity of the autotransformer bushing was tested by using the pointer multimeter.The engineering practice proves that the method is safe,reliable,economical and efficient.

关 键 词：自耦变压器 套管TA TA极性 减极性 正引出 

分 类 号：TM934[电气工程—电力电子与电力传动]