主变运行中微机型差动保护二次接线极性的快速判断

The Prompt Analysis of CT Wiring's Polar in Running of Main Transformer in a Substation

在主变运行后,为了校验主变差动绕组极性是否正确,我们往往是在主变刚投运时用相位表做带负荷检查,而后用相量图做进一步分析。这种方法虽然比较准确,但是太麻烦,我们不可能在主变运行过程中一直都带有相位表,而且很多变化也都是在主变运行一段时间后出现的,所以在此我们对差动绕组的校验进行了进一步探讨。

When putting in the main transformer,We also use the phase meter to check and analysis the ct wiring＇s polar.But,this way is troubsome,because we can＇t taking the phase meter with us always, and we need to juge the polar at any conditions when needing.So we analysis and sum up all the phase combination.