This paper presents a new concept in ultra-high speed distance relay for power line protection. The idea is based on the use of a sampling window shorter than usual to speed commutation. The reduction in protection time is obtained through a variable window that is expanded sample by sample until a satisfactory precision is reached in the calculation of fault quantities. The right window length is obtained automatically via software and time-by-time changes depending on the characteristics of the fault. The algorithm is based on the equation associated to the R-L fault circuit, whose solution is obtained using the phase modified Fourier transform. To validate the proposed procedure, a large number of simulations are performed with reference to an existing 150-kV subtransmission line. In comparison with other solutions, the relay proposed here is very cost-effective and makes it possible to achieve ultra-high speed fault localization not only on high-voltage (HV) networks but also on medium-voltage (MV) distribution networks.

Fazio, G., Lauropoli, V., Muzi, F., Sacerdoti, G. (2003). Variable-window algorithm for ultra-high-speed distance protection. IEEE TRANSACTIONS ON POWER DELIVERY, 18(2), 412-419 [10.1109/TPWRD.2002.807159].

Variable-window algorithm for ultra-high-speed distance protection

FAZIO, GIUSEPPE;
2003-04-01

Abstract

This paper presents a new concept in ultra-high speed distance relay for power line protection. The idea is based on the use of a sampling window shorter than usual to speed commutation. The reduction in protection time is obtained through a variable window that is expanded sample by sample until a satisfactory precision is reached in the calculation of fault quantities. The right window length is obtained automatically via software and time-by-time changes depending on the characteristics of the fault. The algorithm is based on the equation associated to the R-L fault circuit, whose solution is obtained using the phase modified Fourier transform. To validate the proposed procedure, a large number of simulations are performed with reference to an existing 150-kV subtransmission line. In comparison with other solutions, the relay proposed here is very cost-effective and makes it possible to achieve ultra-high speed fault localization not only on high-voltage (HV) networks but also on medium-voltage (MV) distribution networks.
apr-2003
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore ING-INF/07 - MISURE ELETTRICHE ED ELETTRONICHE
English
Computer relaying; Distance protection; Transmission and distribution systems
Algorithms; Computer software; Electric lines; Electric power distribution; Electric power transmission; Fourier transforms; Distance protection; Electric relays
Fazio, G., Lauropoli, V., Muzi, F., Sacerdoti, G. (2003). Variable-window algorithm for ultra-high-speed distance protection. IEEE TRANSACTIONS ON POWER DELIVERY, 18(2), 412-419 [10.1109/TPWRD.2002.807159].
Fazio, G; Lauropoli, V; Muzi, F; Sacerdoti, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/55676
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