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Cable differential protection systems based on non-conventional current sensors

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7 Author(s)
dos Santos, A. ; Rede Electr. Nac., Sacavem, Portugal ; Martins, J.F. ; Monteiro, P. ; Kojovic, L.A.
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This paper presents a novel solution for the protection of high-voltage power cables based on differential protection principles with currents measured by Rogowski Coil current sensors. This solution has been designed for implementation on four in- service 220 kV power cables that interface a gas-insulated substation (GIS) with overhead transmission lines. The protection system has been subjected to extensive testing in a high power laboratory and in a field application that provided extreme power system operating conditions. All tests have verified the high dependability and security of the solution.

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Protective Relay Engineers, 2010 63rd Annual Conference for

Date of Conference:

March 29 2010-April 1 2010

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