The Research On Project Design Of Power Transformation And Distribution System In Subway

Power transformation and distribution system in subway provides all loads electric energy except electric train, has the very important functions to subway's normal operation. Under the background of accelerating construction of subway's engineering for resolving the mass transit problems in our country, the research on project design of power transformation and distribution system in subway is very important.(1) This article studies the problem of subway's load calculation, gives out suggestion values of subway's unit target and demand factor for load calculation of subway's power transformation and distribution system, analyzes and computes the problems combining with an example.(2) This article thoroughly studies the characteristics of subway's power transformation and distribution system, produces the overall power distribution plan of actual project. Based on the characteristics of subway's power transformation and distribution system and external power plan in city, this article analyzes the functions and formations of the medium-voltage power distribution network and the substation, gives three kinds design plans respectively.(3) This article explains loads division as well as power supply request, discusses the principles of power distribution system design, design of distribution line, choices of low voltage electric appliance and the application of microcomputer protective device of electric motors.(4) This article analyzes the characteristics of illumination in subway, suggests design measures on illumination power distribution and its controlling modes, illumination qualities, lamp selections as well as the design case of subway's illumination.After the M8 subway line in Shanghai, this article studies the ways of load calculation, overall power distribution plan, power distribution design as well as illumination design method in subway,which has the certain instruction function and the important reference significance for design of subway's power transformation and distribution system.