特高压变压器调压补偿变压器配置独立差动保护的必要性

Necessity of UHV Regulating and Compensating Transformer Equipped with Independent Differential Protection

针对特高压变压器主体变压器与调压补偿变压器分体结构的特点,介绍了特高压变压器差动保护配置方案,通过对调压及补偿绕组内部故障的动态模拟试验,得出大差差动保护对调压补偿变内部故障灵敏度不足,说明调压补偿变压器配置独立差动保护的必要性。

For the characteristics of split structure of UHV main transformer and the regulating and compensating transformer, the configuration scheme of differential protection for UHV transformer is introduced. Through the dynamic simulation experi- ment of internal faults of regulating and compensating windings, it is concluded that the sensitivity of differential protection of main winding is insufficient for the internal faults of regulating and compensating transformer, which explains the necessity of independent differential protection.