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An adaptive scheme for parallel-line distance protection

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4 Author(s)
Yi Hu ; ABB Electr. Syst. Technol. Inst., Raleigh, NC, USA ; Novosel, D. ; Saha, M.M. ; Leitloff, V.

This paper describes an adaptive protective relaying scheme for parallel-line distance protection. The scheme adjusts its operation based on the availability of input signals to achieve an optimal distance protection performance on parallel transmission lines influenced by the mutual coupling effect. When available, zero sequence current from the parallel line is used to fully compensate the mutual coupling effect. The zero sequence current ratio is used to avoid possible false operations on healthy lines, which may result from such compensation. When the parallel line's zero sequence current is not available, the line operating status is used instead to select the proper zero sequence current compensation factors in impedance calculation. Default zero sequence current compensation factor is used when both the parallel line's zero sequence current and line operating status signals are not available. The performance of the scheme has been verified on a simulated network and the results are presented

Published in:

Power Delivery, IEEE Transactions on  (Volume:17 ,  Issue: 1 )

Date of Publication:

Jan 2002

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