主变比率差动门槛值的现场校验方法  

Field Calibration Method of Ratio Differential Threshold value of Main Transformer

作　　者：汪骜 WANG Ao(Shanghai Power Transmission and Transformation Engineering Company,Shanghai 200235,China)

机构地区：[1]上海送变电工程有限公司,上海200235

出　　处：《电力与能源》2022年第4期366-368,共3页Power & Energy

摘　　要：在变压器微机保护装置的现场校验过程中,比率差动曲线的校验是调试中的难点。分析了变压器保护装置常用的两类差动电流的补偿计算方法,同时以Y/Y/Δ-11型三绕组变压器为例,介绍了PCS-978T5-G和NSR-378T5变压器微机保护装置的调试方法,提出了一套验证变压器比率差动门槛值的想法和方案。The calibration of ratio differential curve is a difficult point in the field calibration of microcomputer protection device of transformer. Two kinds of differential current compensation calculation methods commonly used in transformer protection devices are analyzed. Taking Y/Y/△-11 three-winding transformer as an example, the debugging methods of PCS-978T5-G and NSR-378T5 protection devices are introduced, and a set of ideas and schemes to verify the differential threshold value of transformer ratio are presented.

关 键 词：变压器 差动保护 比率差动 校验方法 

分 类 号：TM63[电气工程—电力系统及自动化] TM561