Study on Electric Power Quality Problem of Mine Electric Power Supply Network Affected by Electrified Railway System

In order to master the electric power quality status and features of the mine electric power supply system jointly operated with the mine electrified railwa y system, to improve the mine electric power supply safety and to protect the affectivity of the mine contral plan, in combination with the actual electric power supply co nditions of a 110 kV mine electric power network, the electric power quality measuring and test technology, the stable regression harmonic source position technology, t he PsCad negative sequence current simulation technology and other method were applied to analyze the electric power quality status of the mine electric network, thre e phase unbalanced cause and the harmonic current upward features under the influences of the electrified railway to provide the scientific basis to the selection and C ontrol of the later electric power quality control technology.