Railway traction power supply and transformation compensation circuit based on T-structure double-inductance branch

A railway traction and compensation circuit technology, applied in the direction of reducing the asymmetry of the polyphase network, eliminating/reducing the asymmetry of the polyphase network, etc. The effect of reducing the difference, reducing the three-phase unbalance, and improving the power supply efficiency

Active Publication Date: 2020-03-06
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP +1
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  • Application Information

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Problems solved by technology

[0004] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a railway traction power supply and transformation compensation circuit based on a T-structured double inductance branch, the purpose of which is to solve the The problem of asymmetrical operation of the power system and increased power loss caused by the unbalanced three-phase

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  • Railway traction power supply and transformation compensation circuit based on T-structure double-inductance branch
  • Railway traction power supply and transformation compensation circuit based on T-structure double-inductance branch
  • Railway traction power supply and transformation compensation circuit based on T-structure double-inductance branch

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0036] The present invention proposes a T-structure double-inductance branch railway traction power supply and transformation compensation technology, based on the T-structure symmetrical conversion circuit of the 10(35)kV / 27.5kV step-up transformer, the compensation of the double-inductance branch (LL compensation ) scheme and multi-level control method to effectively restrain the impact of tra...

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Abstract

The invention discloses a railway traction power supply and transformation compensation circuit based on a T-structure double-inductance branch, which relates to the technical field of electrified railway power supply and transformation engineering. The railway traction power supply and transformation compensation circuit comprises a Y-shaped three-phase primary winding, a triangular secondary winding and a V-shaped secondary winding, wherein the triangular secondary winding outputs a first phase voltage, the V-shaped secondary winding outputs a second phase voltage, and two leading-out ends of the triangular secondary winding and two leading-out ends of the V-shaped secondary winding are connected through a common connecting wire to form a T-shaped structure. The three-phase current symmetry of the primary side can be ensured by controlling the two-phase current symmetry of the secondary side, so that the three-phase unbalance degree is effectively reduced, and the influence of the access of a traction load on the negative sequence of a power grid is inhibited.

Description

technical field [0001] The invention belongs to the technical field of electrified railway power supply and transformation engineering, and more specifically relates to a railway traction power supply and transformation compensation circuit based on a T-structure double inductance branch. Background technique [0002] The traction transformer in the railway traction power supply system is a power conversion device that converts the external power supply voltage provided by the power system into the voltage required by the electric locomotive. The domestic power system adopts the three-phase AC power supply mode, but the electrified railway traction power supply system is a single-phase load, which has the characteristics of heavy load, changeable, low power factor, high harmonics, etc. After being connected to the power system, it will have a serious impact on the power quality of the grid , will cause asymmetric operation of the power system and increase power loss. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 张华志罗杰丁坚勇吕文利黄军车锐坚陈争李晨琨汪自成
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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