换流变压器非电量保护“三取二”逻辑简介

"Pick Two Among Three" Logic Scheme of the Non-electrical Protection for Converter Transformers

对换流变压器非电量保护“三取二”逻辑进行了功能分类和分析。历年的换流站闭锁事件说明了非电量“三取二”保护逻辑的必要性。论述了各类型“三取二”保护逻辑的优缺点,为今后新建直流输电工程的非电量保护选型提供参考。

Functional classification and analysis on the“Pick Two Among Three”logic scheme of the non-electrical protection for converter transformers were done.Necessity of the“Pick Two Among Three”protective logic scheme was proved through the historical shut-off accidents of the converter transformer stations.Advantages and shortcomings of various kinds of“Pick Two Among Three”logic scheme were described,as the reference to select suitable type of the non-electrical protection schemes for the newly-built dc transmission project in future.