RCS-978变压器差动保护比率制动特性检验方法研究  

Research on method to test ratio braking characteristics of RCS⁃978 transformer differential protection

作　　者：盖国权 贾义 巴音虎 陈美荣 GAI Guo⁃quan;JIA Yi;BA Yin⁃hu;CHEN Mei⁃rong(Bayannur Electric Power Bureau,Inner Mongolia Power(Group)Co.,LTD,Bayannur 015000,China;Xilinguole Electric Power Bureau,Inner Mongolia Power(Group)Co.,LTD,Xilinhot 026000,China)

机构地区：[1]内蒙古电力(集团)有限责任公司巴彦淖尔电业局,内蒙古巴彦淖尔015000 [2]内蒙古电力(集团)有限责任公司锡林郭勒电业局,内蒙古锡林浩特026000

出　　处：《电子设计工程》2020年第10期69-73,共5页Electronic Design Engineering

摘　　要：针对如何正确地检验变压器纵差动保护比率制动特性的难题,文章提出了一种检验差流平衡和比率制动特性的方法。文章介绍了变压器纵差动保护的基本原理、不平衡电流产生的原因和减小不平衡电流影响的对策,论述了电流相位和幅值的调整方法,以YNyn0d11型变压器的RCS-978型纵差动保护为例,从电流相位补偿方式入手,论述了该保护的比率制动特性,最后进行了检验差流平衡和比率制动特性的实验,给出了实验的接线示意图,详细论述了实验的具体步骤。实验结果表明文章提出的检验方法的正确性和可行性,该方法具有较好的工程实用性。In view of the difficulty of how to correctly test the ratio braking characteristics of transformer longitudinal differential protection,a method to test the differential current balance and ratio braking characteristics was proposed.This paper introduced the basic principle of transformer longitudinal differential protection,causes of unbalanced current generation and countermeasures to reduce the influence of unbalanced current,and discussed the adjustment method for current phase and amplitude,taking the RCS⁃978 type longitudinal differential protection of YNyn0d11 transformer as an example.Starting from the current phase compensation method,this paper discussed the ratio braking characteristics of the protection,and finally carried out the experiments to test the differential current balance and ratio braking characteristics,gave the wiring diagrams of the experiments,and discussed the specific steps of the experiments in detail.The experimental results show that the test method proposed in this paper is correct and feasible,and it has good engineering practicability.

关 键 词：变压器 差动保护 比率 制动特性 校验 

分 类 号：TM774[电气工程—电力系统及自动化]