某电厂#2主变差动保护动作分析及整改

Analysis and Rectification of Differential Protection Action of No.2 Main Transformer in a Power Plant

主变差动保护是变压器的主保护,它的作用是主变绕组内发生相间故障时保护动作跳闸,将主变脱离系统。该保护能否正确动作直接关系主变的安全。因此,分析了某电厂的主变差动保护误动作,并提出了相应的解决办法。

The main variable differential protection is the main protection of the Transformer.Its role is to protect the action trip in the event of interphase failure in the main variable winding group and to separate the main change from the system.Whether this protection can be properly performed directly relates to the safety of the main change.Therefore,the main variable differential protection error action of a power plant is analyzed,and the corresponding solutions are put forward.