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Traction contact system

A catenary and traction motor technology, applied in the direction of electric power transmission AC network, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve high power loss and three-phase power system load imbalance To achieve the effect of reducing power loss, balancing and stabilizing three-phase power load, and improving utilization rate

Active Publication Date: 2013-01-30
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Problems solved by technology

[0004] The technical problem to be solved by this application is to provide a traction catenary, which is used to solve the problem that when the traction catenary directly couples the three-phase alternating current to generate single-phase alternating current in the prior art, the traction catenary has a single-phase nature, resulting in three-phase Unbalanced load of the power system, technical problems of high power loss

Method used

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Embodiment Construction

[0096] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0097] At present, the power system, that is, the generator in the power plant, passes the AC generated by the step-up transformer to obtain high-voltage AC that is convenient for long-distance transmission, and passes the high-voltage AC through the traction transformer and traction catenary in the railway power supply system to obtain single-phase AC. , the single-phase inverter in the power distribution system rectifies and converts the single-phase AC to obtain a three-phase AC t...

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Abstract

The application discloses a traction contact system applied to a locomotive load; the locomotive load at least comprises a frequency converter and a traction motor; the traction contact system comprises a first receiving end convertor station and a first sending end convertor station, wherein the first receiving end convertor station is connected with a power system, rectifies a three-phase alternating current output by the power system to obtain a direct current and outputs the direct current; and the first sending end convertor station receives the direct current output by the first receiving end convertor station, inverts the direct current to obtain a single-phase alternating current, conveys the single-phase alternating current to a frequency changer, triggers the frequency changer to rectify and invert the single-phase alternating current to generate the three-phase alternating current, and sends the three-phase alternating current to the traction motor. According to the traction contact system disclosed by the embodiment of the invention, the three-phase power load of the power system for providing the three-phase alternating current can be balanced and stabilized, thereby avoiding the shortage of unbalanced load of the power system, reducing the loss of electric energy and improving the utilization rate of the electric energy.

Description

technical field [0001] The present application relates to the technical field of high-voltage power transmission, in particular to a traction catenary. Background technique [0002] Currently, if figure 1 Shown is a schematic diagram of the structure of the electrified railway power supply system applied in current transmission. Wherein, after the power system generates three-phase high-voltage alternating current, the three-phase high-voltage alternating current is transmitted to each locomotive load through the electrified railway power supply system, so as to supply power to the traction motor in the locomotive load. Among them, the electrified railway power supply system includes a traction catenary, which directly couples the 110kv high-voltage alternating current output by the power system to generate 25kv single-phase alternating current, and transmits the single-phase alternating current to the frequency converter of the locomotive load for rectification and inversi...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02P27/06H02J3/26
CPCY02E40/50
Inventor 吴强敬华兵王卫安何伯钧邓明唐剑钊翟文杰龚芬彭京刘斐姜耀伟
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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