Comparative Evaluation of Adaptive and Conventional Distance Relay for Parallel Transmission Line with Mutual Coupling

This paper presents the development of adaptive distance relay for protection of parallel transmission line with mutual coupling. The proposed adaptive relay, automatically adjusts its operation based on the acquisition of the data from distance relay of adjacent line and status of adjacent line from line circuit breaker IED (Intelligent Electronic Device). The zero sequence current of the adjacent parallel transmission line is used to compute zero sequence current ratio and the mutual coupling effect is fully compensated. The relay adapts to changing circumstances, like failure in communication from other relays and non - availability of adjacent transmission line. The performance of the proposed adaptive relay is tested using steady state and dynamic test procedures. The fault transients are obtained by simulating a realistic parallel transmission line system with mutual coupling effect in PSCAD. The evaluation test results show the efficacy of adaptive distance relay over the conventional distance relay.

Authors:

• S.G. Srivani
• Chandrasekhar Reddy Atla
• K.P.Vittal

Keywords:

• Adaptive relaying
• distance measurement
• mutualcoupling
• quadrilateral trip characteristic
• zones of protection.

References:

[1] A.G.Jongepier, L.van der Sluis, "Adaptive Distance Protection of a
Double-Circuit Line", IEEE Transactions on Power Delivery, Vol.9,
pp.1289-1297, July 1994.
[2] Yi Hu, Damir Novosel, Murali Mohan saha, "An Adaptive Scheme for
Parallel-Line Distance Protection", IEEE Transactions on Power
Delivery, Vol.17, pp. 105-110, Jan2002.
[3] M. H. J. Bollen, "Traveling-wave-based protection of double-circuit
lines," Proc. Inst. Elect. Eng., pt. C, vol. 140, no. 1, pp. 37-47, Jan.1993.
[4] P. G. McLaren, I. Fernando, H. Liu, E. Dirks, G.W. Swift, and C. Steele,
"Enhanced double circuit line protection," IEEE Trans. Power Delivery,
vol. 12, pp. 1100-1108, July 1997.
[5] R.D.Dunlop, R.Gutman, P.P.Marchenko, "Analytical Development of
Loadability Characteristics for EHV and UHV Transmission lines",
IEEE Transactions on Power Apparatus and Systems, Vol.PAS-98, pp.
606-617, April 1979.