解决系统负相序对主变微机差动保护的影响

To Solve the Influence of Negative Sequence System to Microprocessor Differential Protection for Main Transformer

阐述了文笔山变电站在系统一次为负相序的情况时,通过改变接线和定值的方法,达到了使主变微机差动保护满足系统要求的目的。

There exists the negative sequence voltage in primary system of wenbishan substation. By means of changing the connections and settings, the microprocessor differential protection for main transformer was satisfied with the system requiment.