As the first defence of power system,protective relays plays an important role in preventing failure and disturbance, it is significant part of power system,and whether it could work normally will bring important effect to power system.With the augmentation of power network, capability and the grade of voltage, the failures influence wide section and more customers.To ensure power network work normally,the requirement of high speed, accuracy, reliable action of protective relays will be more significant,so ...
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