Study Of The Harmonic Of HXD1C Type Electric Locomotive

With the rapid development of harmonious type locomotive, electrified railway lines on the AC-DC type electric locomotive gradually to new type of AC drive electric locomotive. But AC-DC-AC electric locomotive at a certain frequency range still contains high harmonic current, when the parameters of a harmonic current locomotives and traction network with the occurrence, and meeting certain resonance conditions,may stimulate the high order harmonic of traction network. In order to improve the safety of the high-speed electrified railway running and find a reasonable method to control harmonic, the harmonious locomotive and harmonic resonant characteristics of the traction power supply system are studied.At first, this paper investigates the locomotive fault condition, analyzes the cases of the traction cannot work normally because of thecatenaryharmonic interference, leading to the train in the interval was forced to stop or request the rescue fault, The paper analyzes the reasons for different types of rectifier elements injury of technical parameters HXD1C locomotive. From traction fluctuation problems occurred of harmonious electric locomotive after using, Study the mechanism for harmonious electric locomotive harmonic generation, and the harm of harmonics to the AC-DC drive locomotive and traction power supply system, discusses the relation among the harmonic voltage.harmonic impedance, and harmonic current. Then from two aspects of harmonic impedance and harmonic current respectively, this paper analyzes the system harmonic impedance frequency characteristic change rule and the main factors affecting the change, according to the characteristics and actual production conditions, making methods and measure to restrain the harmonics and proposing the dc locomotive retrofit scheme. Effectively suppress resistance burning fault of the dc locomotives and resistance capacitance protection device of power supply system of the train, to prevent interfere with each other under a mixture of different types of locomotives, it's the correct research direction for higher harmonic governance provides.