The Research Of Influence To The Line Protection And Bus Protection In Power System With Harmonics And Negative Generated By The Electrical Railway

The electric locomotive loads impact characteristic and produces the harmonic current and the negative sequence electric current,manifest adversely effect to the line protection and bus protection in many aspects.This article has analyzed the electrification railroad system load characteristic through the consult massive materials, and to the electrical power system influence,specially to the electrical power system two equipment influences,has selected several kinds of typical line protection and the bus protection.Through the principle analysis,using the EMTDC/PSCAD software establishment mathematical simulation model and carries out ways and so on RTDS experiment,has analyzed the hard overtone and the negative sequence characteristic to the line and the bus protection influence,and has drawn the corresponding conclusion.