浅谈大容量变压器继电保护的整定及配合

35kV大容量变压器短路阻抗相对较小,造成35kV线路过流保护与35kV主变压器10kV侧后备保护无法配合,通过对实例变电站保护定值进行计算,对存在的问题进行分析,提出了采用35kV变压器10kV侧增加一段与10kV出线有灵敏度段进行配合的后备保护的方法,可解决保护不配合问题,提高供电可靠性。

Setting and Coordination of High Capacity Transformer Relay Protection

The short circuit impedance of 35kV high-capacity transformers is relatively small,resulting in over-current protection 35kV and 35kV lines 10 kV side of transformer backup protection could not coordinate with each other,through the example of substation protection setting calculations,the problems are analyzed by the definite value cases of transformer relay protection calculation.The methods of add 10 kV side of the outlet sections with a sensitivity of back-up to 35kV transformer are proposed which could...