Based On The Traction Power Supply System Of Metro DC Protection Characteristics Of Grounding Optimization Strategy Research

With the rapid development of our national economy and urban traffic growth,urban rail transit is increasing all parts of the country. The requirement about safety, ontime and speediness of citizen is increasing. The subway operator’ pressures areincreasing. In which, the night after shutdown, to ensure that the metro line on a varietyof construction safety, the subway along the line contact net/contact rail power groundwire hanging this one, it requires considerable human and material resources. Justdepends on the full range of each site to send staff to hang traditional ground the waythey operate, is very conservative, the high cost of human resources for the rapiddevelopment of the domestic subway. Domestic metro DC system optimizations hangground strategies and methods for comparison to the conservative side stage.And domestic major cities in metro DC protection devices are from abroad. Thisstudy is the significance of the principle of traction power supply system protection andprotection of metro, on the basis of analysis of DC traction power supply systemshort-circuit fault, the theoretical analysis and subway traction power supply DC systemtest by comparing the theoretical and experimental data obtained subway traction powersupply system optimization blackout hanging ground strategy.After more than theoretical calculations, the traction power supply system derivedsubway optimization strategies, and apply it to the actual blackout hanging ground.Through further engineering test, verify the power supply system to the development ofthe hanging ground rationality optimization strategy to protect the configuration iscorrect. Optimize the allocation of human resources. Under the premise of ensuringsafety, improve work efficiency.In summary, the study, a deep understanding of the principles and configuration ofthe the metro DC power supply system protection, manpower allocation blackouthanging ground optimization strategy to provide a theoretical basis for engineering testdata, and has a very important practical significance.