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Application of a new technique to HV transmission line distance relaying

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4 Author(s)
Wang, A.D. ; Xi''an Jiaotong Univ., China ; Ge, Z.Y. ; Lai, L.L. ; Johns, A.T.

A new principle for digital distance relays is presented by the authors. The principle of operation is based upon the superimposed theory and modal transformation. The modal voltages and currents of the fault components are used to determine fault zones. An algorithm is proposed and implemented with an IBM-PC in FORTRAN. EMTP is used to simulate fault data on a typical 500 kV transmission system in China. With the data, the performance of the relay under different types of faults, source/line impedance ratio, fault resistance and fault inception angles has been investigated

Published in:

Advances in Power System Control, Operation and Management, 1991. APSCOM-91., 1991 International Conference on

Date of Conference:

5-8 Nov 1991