Busbar Differential Relaying Method Based on Combined Amplitude and Phase Information of High Frequency Transient Currents


Busbar differential relaying method based on combined amplitude and phase information of high frequency transient currents is put forward in this paper for the speed and reliability problems of busbar protection based on fundamental frequency. Under the analysis of features of bus high frequency differential currents, complex wavelet analysis is used to extract the amplitude and phase features of 1/4 period high frequency differential currents, and amplitude and phase information are used to form the polar coordinates. Bus fault is identified intuitively and precisely according to polar locus differences. This polar coordinates represented busbar differential protection scheme based on high frequency transient signals can not only avoid TA saturation, realizing quick protection, lots of PSCAD/EMTDC simulations also show that this busbar differential protection scheme works well under different fault conditions.

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X. Wu, Z. He and X. Li, "Busbar Differential Relaying Method Based on Combined Amplitude and Phase Information of High Frequency Transient Currents," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 1288-1292. doi: 10.4236/epe.2013.54B244.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Y. Z. Ge, “New Protective Relay and Fault Location Principle and Technique, Xi;an: Xi’an Jiaotong University Press, 2007.
[2] Y. B. Zhao and Y. P. Lu, “An Asynchronous Method Based Saturation Criterion for CT in Busbar Protection,” Power System Technology, Vol. 30, No. 6, 2006, pp. 6-90.
[3] J. F. Ren and G. Li, “Study on an Integrated Criterion for Ta Anti-saturation of Microprocessor-based Busbar Differential Protection,” Power System Technology, Vol. S2, 2006, pp. 362-366.
[4] C. H. Wu, Y. P. Lu and X. B. Liu, “Busbar Sampled Value Differential Protection Based on Linear Transfer Section Checking of TA, Power System Technology, Vol. 32, No. 14, 2008, pp. 71-74.
[5] M. M. Eissa, “A New Digital Busbar Protection Technique Based on Frequency Information during CT Saturation,” Electrical Power and Energy Systems, 2013, pp. 42-49.
[6] L. A. Kojovie, “Guidelines for Current Transformers Selection for Protection Systems,” IEE Power Engineering Society Summer Meeting, 2001, pp. 593-598.
[7] Y. D. Liu, Z. P. Wang and Z. M. Zhang, “Study on Comprehensive TA Saturation Criterion for Transformer Differential Protection,” Power System Technology, Vol. 31, No. 18, 2007, pp. 87-90.
[8] Y. Z. Ge, X. L. Dong, et al., “A New Busbar Protectilon Based on Current Traveling Waves and Wavelet Transform - Principle and Criterion,” Transactions of CES, Vol. 18, No. 2, 2003, pp. 95-99.
[9] J. D. Duan, B. H. Zhang et al., “A Distributed Bus Protection Using Transient Traveling Wave Power Directions of Transmission Lines,” Proceedings of the CSEE, Vol. 24, No. 6, 2004, pp. 7-12.
[10] J. Zhang, X. D. Zhang and T. Lin, “A Directional Protection Based on Traveling Wave Current Polarity Comparison Using Wavelet Transform,” Power System Technology, Vol. 28, No. 4, 2004, pp. 51-54.
[11] L. Cui, Q. Chao and L. F. Cui, “Research on Bus Travelling wave Protection Based on Wavelet Transform,” Electric Switchgear, Vol. 1, 2009, pp. 53-55.
[12] J. D. Duan, B. H. Zhang, J. F. Ren, et al., “Single-Ended Transient-based Protection for EHV Transmission Lines Basic Theory,” Proceedings of the CSEE, Vol. 27, No. 1, 2007, pp. 37-43.
[13] B. H. Zhang and X. G. Yin, “New Relay Protection for Power Grid,” Beijing: Chine Electric Power Press, 2005
[14] H. F. Li, G. Wang et al., “A Novel Busbar Proteetion Based on Transient Current Spectrum Energy,” Automation of Electric Power Systems, Vol. 29, No. 6, 2005, pp. 51-54.

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