A Novel Busbar Protection Based on Transient Current Spectrum Energy

This paper proposes a novel transient current based protection technique for busbar. The proposed technique uses wavelet transform to extract the high-frequency components of fault-generated transient currents in all circuits connected to the busbar. By comparing their spectrum energies in a given time, an internal or external fault can be identified before current transformer saturation occurs. The protection scheme for busbar configuration of one and half breaker is also discussed. The EMTP simulation shows that the scheme is correct and effective.