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

DOI: 10.4236/epe.2013.54B244   PDF   HTML     4,186 Downloads   5,073 Views   Citations


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.


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