公开(公告)号：US20150268290A1

公开(公告)日：2015-09-24

申请号：US14436815

申请日：2013-10-09

申请人： STATE GRID CORPORATION OF CHINA (SGCC) ,  STATE GRID CHONGQING ELECTRIC POWER CO. ELECTRIC POWER RESEARCH INSTITUTE

发明人： Guojun He ,  Ruilin Xu ,  Tao Chen ,  Youqiang Zhang ,  Hongbin Wang ,  Jian Luo ,  Jin Gao ,  Xiaoyong Zhang ,  Xiaorui Hu ,  Jiayong Zhong ,  Zujian Liu ,  Shuyou Yao ,  Hongxin Yu ,  Yan He ,  Jie Li ,  Wei Xiong ,  Su Wei ,  Fei Huang ,  Ruimiao Wang ,  Kun Jiang ,  Xin Xu ,  Te Zhu ,  Yan Wei

IPC分类号： G01R31/02

CPC分类号： G01R31/027 ,  G01R35/02

摘要： A method for on-line diagnosing gradually-changing fault of electronic current transformers comprises the following steps collecting output signals of electronic transformers of a whole transformer substation, calculating theoretical instantaneous values of the current at the tail ends of power transmission lines and on secondary sides of transformers at every moment, comparing the theoretical instantaneous values with the corresponding collected values, calculating residual errors of the electronic current transformers at the head and tail ends of each power transmission line and the primary and the secondary sides of each transformer respectively, judging whether gradually-changing fault occurs with the electronic current transformers by comparing the residual errors with preset threshold values, and simultaneously performing Kirchhoff detection by injecting current into a busbar to position a fault transformer.

摘要翻译： 一种用于在线诊断电子电流互感器逐渐变化的故障的方法包括以下步骤：收集整个变电站电子变压器的输出信号，计算输电线末端和次级侧电流的理论瞬时值 分别对理论瞬时值和相应的收集值进行比较，分别计算出各变压器线路和各侧变压器的前端和后端电子电流互感器的残余误差，判断是否 通过将残留误差与预设阈值进行比较，电子电流互感器发生逐渐变化的故障，同时通过将母线注入母线来定位故障变压器来同时执行基尔霍夫检测。