A railway engine AC traction in-phase power supply device based on YN,vd wiring transformer

A technology of in-phase power supply and transformer, which is applied in the direction of conversion equipment for intermediate conversion to DC, conversion equipment for conversion to DC without intermediate conversion, single-network parallel feeding arrangement, etc., which can solve the problems of accuracy and reliability. Serious problems, technology and economy are difficult to achieve the ideal state, restricting the development of both railways and electric power, etc., to achieve economic and safe and reliable operation guarantee, avoid electricity phase separation, and improve the balance of load
CN100505499CInactive Publication Date: 2009-06-24SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2009-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

A kind of railway locomotive AC traction co-phase power supply device based on YN, vd connection transformer, wherein the traction transformer is a three-phase-two-phase balance transformer (T) with YN, vd connection, the line voltage output end of the transformer (T) (T) A rectifier inverter (Z) is connected between b', c') and the phase voltage output terminals (a, x), and the line voltage output terminals (b', c') or the phase voltage output terminals (a, x) are used as The power supply terminals (V1, V2) of the traction locomotive; at the same time, the control device of the rectifier inverter (Z) is connected with the power supply terminals (V1, V2) of the traction locomotive. The device can realize the same-phase power supply for the entire railway line without the need for phase separation, and the power supply voltage of each traction substation section is stable, ensuring the high-speed and heavy-load operation of the locomotive; the power supply system of the railway traction load draws power from the three-phase power grid, eliminating the need for railway Influence of traction load on power quality of utility grid. In addition, the device can be transformed by using the existing traction transformer, with low cost and easy implementation.
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Description

technical field

[0001] The invention relates to an AC traction in-phase power supply device for a railway locomotive. Background technique

[0002] The single-phase system has the advantages of simple structure, low construction cost, convenient operation and maintenance, etc., which determines that single-phase power frequency AC power is generally used to power railway locomotives in electrified railways. The power system hopes that all loads will use the three-phase symmetrical fundamental current from the power grid to make full use of the capacity of equipment and lines and reduce the harm of reactive current and harmonic current to the system. In order to meet this requirement, the electrified railway adopts the scheme of phase sequence rotation and phase-by-phase power supply, that is, every 20-25km along the railway line is regarded as a power supply section, and each section is powered by different phases in the power grid in turn. A phase separation section of abo...

Claims

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