ABSTRACT Fault location and distance protection are essential smart grid technologies ensuring reliability of the power system. This paper describes an accurate algorithm for locating faults on double-circuit transmission lines. The proposed approach is capable of identifying the faulted circuit of a parallel transmission line by checking the estimated fault location and fault resistance. Voltage and current measurements from only one of the terminals of the faulty line are used. No pre-fault data are required for the estimation. The lumped parameter line model considering shunt capacitance is utilized for the derivation of the algorithm. It’s assumed that line parameters are known and transmission lines are fully transposed. The method is applicable to all types of faults. It’s evinced by evaluation studies that the proposed algorithm can correctly determine the faulted circuit in most cases. For exceptional cases, the current waveforms during the fault can be used to help identify the faulted circuit. The proposed algorithm generates quite accurate fault location estimates, and may be suitable for distance relaying.
Cite this paper
nullW. Xiu and Y. Liao, "Online One-End Fault Location Algorithm for Parallel Transmission Lines," Smart Grid and Renewable Energy, Vol. 2 No. 4, 2011, pp. 359-366. doi: 10.4236/sgre.2011.24041.
 T. Kawady and J. Stenzel, “A Practical Fault Location Approach for Double Circuit Transmission Lines Using Single End Data,” IEEE Transactions on Power Delivery, Vol. 18, No. 4, 2003, pp. 1166-1173.
 Y. Liao and S. Elangovan, “Digital Distance Relaying Algorithm for First-Zone Protection for Parallel Transmission Lines,” IEE Proceedings-Part C: Generation, Transmission and Distribution, Vol. 145, No. 5, 1998, pp. 531-536.
 Y. Ahn, M. Choi, S. Kang and S. Lee, “An Accurate Fault Location Algorithm for Double-Circuit Transmission Systems,” IEEE Power Engineering Society Summer Meeting, Seattle, 16-20 July 2000, pp. 1344-1349.
 J. Izykowski, E. Rosolowski and M. M. Saha, “Locating Faults in Parallel Transmission Lines under Availability of Complete Measurements at One End,” IEE Proceedings-Generation, Transmission and Distribution, Vol. 151, No. 2, 2004, pp. 268-273.
 Power System Relaying Committee, “Guide for Determining Fault Location on AC Transmission and Distribution Lines,” IEEE C37.114, 2005, pp. 1-36.
 G. Song, J. Suonan, Q. Xu, P. Chen and Y. Ge, “Parallel Transmission Lines Fault Location Algorithm Based on Differential Component Net,” IEEE Transactions on Power Delivery, Vol. 20, No. 4, 2005, pp. 2396-2406.
 C. S. Chen, C. W. Liu and J. A. Jiang, “A New Adaptive PMU Based Protection Scheme for Transposed/Untransposed Parallel Transmission Lines,” IEEE Transactions on Power Delivery, Vol. 17, No. 2, 2002, pp. 395-404.
 T. Nagasawa, M. Abe, N. Otsuzuki, T. Emura, Y. Jikihara and M. Takeuchi, “Development of a New Fault Location Algorithm for Multi-Terminal Two Parallel Transmission Lines,” IEEE Transactions on Power Delivery, Vol. 7, No. 3, 1992, pp. 1516-1532. doi:10.1109/61.141872
 T. Funabashi, H. Otoguro, Y. Mizuma, L. Dube and A. Ametani, “Digital Fault Location for Parallel Double-Circuit Multi-Terminal Transmission Lines,” IEEE Transactions on Power Delivery, Vol. 15, No. 2, 2000, pp. 531-537. doi:10.1109/61.852980
 N. Kang and Y. Liao, “Fault Location for Double-Circuit Lines Utilizing Sparse Voltage Measurements,” Power & Energy Society General Meeting, Calgary, 26-30 July 2009, pp. 1-7.
 J. Gracia, A. J. Mazon and I. Zamora, “Best ANN Structures for Fault Location in Single- and Double-Circuit Transmission Lines,” IEEE Transactions on Power Delivery, Vol. 20, No. 4, 2005, pp. 2389-2395.
 Leuven EMTP Centre, “Alternative Transient Program,” User Manual and Rule Book, Leuven, 1987.
 J. Grainger and W. Stevenson, “Power System Analysis,” McGraw-Hill Inc., New York, 1994.