Research on the Configuration of UHV Electrical Devices on the Roof of EMUs of Urban Rail Express Line
According to the"Chongqing Urban Rail Transit Plan(2019-2035)",six urban rail express lines will be constructed in Chongqing.Currently,the construction of Line 27 and Line 15 of the urban rail express line is being accelerated.The Chongqing urban rail transit system will adopt a new 25 kV single-phase AC electric multiple unit,and the configuration of its high-voltage electrical equipment on the roof is a new issue.In order to achieve the optimal configuration of high-voltage electrical devices on the roof of urban rail express electric multiple units,four schemes for the configuration of high-voltage electrical devices on the roof have been proposed.In this paper,the advantages and disadvantages of the four schemes are analyzed and researched in detail.Compared with the first three configuration schemes,configuration scheme 4 is the best in terms of current collection performance(arc rate),self-rescue ability of the high-speed train in case of vehicle failure,freedom of grouping and uncoupling of the high-speed train,arc noise,service life of the pantograph sliding plate,and anti pollution ability of the main high-voltage components on the roof.Although two pantographs have been added to the electric multiple unit,it is cost-effective to reduce two isolation switches,53 m long high-voltage cables,four high-voltage cable terminals,and two sets of jumpers.
urban rail express linehigh voltage cable terminal electrical connectorarc rateinternal insulation integrated high voltage box
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