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Multi-Function Uninterrupted Phase-Separation Passing System and its Control Method

CSEE Journal of Power and Energy Systems 2023年第6期9卷 2332-2343页

作者： Zhou Ni Jiaxin Yuan Feiran Xiao Liwen Peng Zhaoyang Zhang Yongzhi Min the School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China the School of Electrical Engineering Naval University of EngineeringWuhan 430030China the State Grid Jinan Power Supply Company Jinan 250061China the Department of Electrical and Electronic Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

At present, sudden load changes and terminal voltage fluctuations are two primary problems in the uninterrupted phase-separation passing (UPP) system. To further enhance the reliability of the UPP system and compensate for the voltage sag at the end of the traction power supply network caused by the suddenly connection of locomotive to the power grid, a multi-function uninterrupted phase-separation passing system (mupps) and its control strategy are proposed. It has the advantages of linear load change and improving power supply reliability. First, the topology and working principles of a mupps are studied;secondly, the current variation characteristics of the bridge arm when the power is continuously supplied by mupps during the phase-separation passing are analyzed. Then, the characteristics of a mupps to provide reactive power and stabilize the terminal voltage of the traction arm are analyzed. Then, the power transmission characteristics of a mupps under emergency working conditions are analyzed. The control strategy for the two conditions is proposed. Finally, simulation analysis and small capacity experiments are conducted. The theoretical analysis and test confirm the correctness and effectiveness of the mupps.

关键词： Control strategy high-speed railway mupps neutral section

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