微机变压器差动保护灵敏度校验方法的探讨  

Digital Transformer Differential Protection Sensitivity Calibration Method

作　　者：陈雅[1] 王玮[1] 王婧[2] 

机构地区：[1]廊坊供电公司,河北廊坊065000 [2]北京电力公司朝阳供电公司,北京100020

出　　处：《华北电力技术》2014年第1期16-19,63,共4页North China Electric Power

摘　　要：差动保护是变压器内部故障的主保护,保护必须对所发生的故障能够灵敏地进行反应,这就涉及到差动保护的灵敏度问题。如何快速、正确地校验差动保护的灵敏度对继电保护定值整定工作非常重要。该文以本地区电网220 kV变压器为模型,以本地区应用广泛并有代表性的四方CSC326D和南瑞RCS978E两种型号的变压器保护为例对差动灵敏度校验的方法和步骤进行了论述,并总结出了简便、实用的校验方法。Differential protection of transformer internal faults are the main protection, the protection must be able to carry out sensitive reaction to failures, which involves the sensitivity of differential protection. How to quickly and ac- curately check the sensitivity of differential protection relay protection setting is very important. Taking two widely used models of transformer protection as an example,such as the Sifang CSC326D and NARI RCS978E,the calibration methods and procedures of the differential sensitivity are discussed in this paper, and a simple and practical calibration methods are summed up.

关 键 词：变压器 差动保护 灵敏度 校验 电网 

分 类 号：TM77[电气工程—电力系统及自动化]