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A differential line protection scheme for power systems based on composite voltage and current measurements

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2 Author(s)
Aggarwal, R.K. ; Sch. of Electr. Eng., Bath Univ., UK ; Johns, A.T.

A differential feeder protection that utilizes voltage and current signals is described. This approach obviates the need for relay bias to compensate for capacitance spill current, thus improving the relay sensitivity. From a practical point of view, the scheme has been designed to simplify the digital hardware requirements and reduce the bandwidth requirements for signal transmission over a fiber-optic link

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Power Delivery, IEEE Transactions on  (Volume:4 ,  Issue: 3 )