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Through-phase traction power supply system based on balance transformer and four-port mmc

A traction power supply system, four-port technology, applied in power lines, electrical components, transportation and packaging, etc., can solve the problems of insufficient utilization of switching power devices, many bridge arms, and high overall cost, and achieve excellent AC harmonic characteristics, High reliability and cost saving effect

Active Publication Date: 2021-05-28
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many bridge arms, insufficient utilization of switching power devices, and high overall cost.

Method used

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  • Through-phase traction power supply system based on balance transformer and four-port mmc
  • Through-phase traction power supply system based on balance transformer and four-port mmc
  • Through-phase traction power supply system based on balance transformer and four-port mmc

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Embodiment Construction

[0046] Embodiments of feedback of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0047] A through-type co-phase traction power supply system based on a four-port modular multilevel converter proposed according to a feedback embodiment of the present invention will be described below with reference to the accompanying drawings.

[0048] figure 1 It is an embodiment of feedback of the present invention based on a balanced transformer and a four-port MMC through-phase traction power supply system.

[0049] like figure 1 As shown, the through-type in-phase traction power supply system b...

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Abstract

The present invention proposes a through-type in-phase traction power supply system based on a balance transformer and four-port MMC. Traction transformer T in the form of two-phase balanced connection 1 and T 2 , a static power converter SPC with three input and one output ports; T 1 and T 2 The three-phase primary side port of the circuit breaker is connected to the three-phase synchronous public AC grid, T 1 and T 2 The three-phase secondary ports of the SPC are respectively connected to the three input ports of the SPC, and the output ports of the SPC are connected to the traction bus; the SPC is composed of k four-port modular multilevel converters 4P-MMC connected in parallel, and each 4P-MMC Each includes four phases, and each phase is composed of upper and lower bridge arms in series. The three-phase midpoints of each 4P‑MMC are respectively connected to the corresponding input ports of the SPC through a three-phase circuit breaker, and the fourth phase midpoints of each 4P‑MMC are respectively connected by The circuit breaker is connected to the output port of the SPC. The invention has the advantages of simple wiring and low cost.

Description

technical field [0001] The invention relates to a through-type in-phase traction power supply system, a traction substation and a power conversion device thereof, in particular to a through-in-phase traction system for a four-port modular multilevel converter suitable for three-phase-single-phase power conversion power supply system. Background technique [0002] Railway (rail transit) traction power supply system is the energy entrance of electrified railway and urban rail transit system, and is very important to the safety, stability and economy of its operation. The traction power supply system of my country's high-speed, heavy-duty railways and inter-city rapid rail transit adopts the "single-phase 50Hz AC + unilateral power supply" system, and "electric split phase" no-power areas must be set every 10-30km, causing traffic failures The probability is greatly increased, the speed of high-speed rail travel is reduced, the efficiency of heavy-duty transportation is reduced...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/42B60M1/13B60M3/00
CPCB60M1/13B60M3/00H02M5/42H02M1/0083
Inventor 赵印军李笑倩林云志魏应冬李子明张树卿陆超谢小荣
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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