整流机组调压变压器差动保护研究与应用

Differential protection research of voltage regulating transformer of rectifier unit and its application

分析了整流机组调压变压器现有保护配置存在的不足以及配置差动保护的必要性。提出了调压变压器差动保护的解决方案,重点阐述了基于挡位跟踪的调压变压器差动保护的基本原理。针对挡位采集可能出现的异常,提出了多种挡位校验方法,当挡位校验错误时切换到高定值差动保护模式,确保差动保护的可靠性。

This paper analyzed the defects in current protection configuration of voltage regulating transformer of rectifier unit and the necessity of configuring differential protection,proposed solutions of differential protection,and focused on the fundamental principles of differential protection of voltage regulating transformer that based on gear tracking. For the possible exceptions of gear collection, several gear checking methods were proposed. When the gear checking failed,it would switch to high constant value differential protection mode,and which could ensure the reliability of differential protection.