基于DCD-2型继电器构成的变压器纵差保护设计

Design of transformer longitudinal differential protection based on DCD-2 relay

变压器的纵差保护是电力变压器的主保护。变压器励磁涌流中含有大量的非周期分量,采用带加强型速饱和变流器的差动继电器,能更有效地躲开励磁涌流。分析DCD-2型继电器的作用和工作原理,进行了变压器纵差保护的整定设计。

Transformer longitudinal differential protection is the main protection of transformer and a lot of non periodic components is contained in excitation inrush current of transformer. Applying the differential relay with enhanced velocity saturation converter can effectively avoid the excitation inrush current. On the basis of analyzing the functions and working principle of DCD-2 relay, the setting design of transformer differential protection is put forward.