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Three-phase-to-single-phase converter for electric power traction power supply system

A power supply system and electric traction technology, which is applied in the output power conversion device, the conversion of AC power input to AC power output, electrical components, etc. The effect of power quality

Inactive Publication Date: 2015-05-20
XINFENGGUANG ELECTRONICS TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electric traction power supply system adopts the power frequency single-phase AC system, and the single-phase load generates a large negative sequence current in the power grid system, which seriously damages the power quality delivered by the power grid system and poses a great threat to the safe operation of the power grid system.

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  • Three-phase-to-single-phase converter for electric power traction power supply system
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  • Three-phase-to-single-phase converter for electric power traction power supply system

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Embodiment Construction

[0016] A three-phase to single-phase converter used in an electric traction power supply system includes a rectifier module, an inverter module, and a transformer module connected in sequence. The rectifier module is a three-phase full-wave bridge rectifier circuit. The three-phase full-wave bridge rectifier circuit includes three groups of rectifier diodes connected in parallel with each other in the same direction, each group includes two rectifier diodes connected in series, and the three-phase AC voltage is connected between two rectifier diodes connected in series. The positive and negative poles of the rectified DC voltage are respectively led from the two parallel ends of the three groups of rectifier diodes; the inverter module is a bridge inverter circuit, and the bridge inverter circuit includes two sets of parallel-connected parallel terminals. Thyristors, each group includes two thyristors connected in series. After rectification (before inverter), the positive and n...

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Abstract

The invention relates to a three-phase-to-single-phase converter for an electric power traction power supply system. The three-phase-to-single-phase converter comprises a rectification module, an inversion module and a transformation module in sequential connection, wherein the rectification module is a three-phase full-wave bridge rectifier circuit, the inversion module is a bridge type inversion circuit, and the transformation module is a transformer. The three-phase-to-single-phase converter is a device for converting 35KV(10KV) three-phase alternating current electricity into 27.5KV single-phase alternating current, a special power supply system for an electric power traction locomotive, the three phases are used for maintaining the balance to overcome the fatal defect that the existing traction locomotive system form a great amount of negative-sequence current. The three-phase balanced operation is realized, the electric power electric energy quality is improved, and the powerful guarantee is provided for the safe and reliable operation of an electric network system.

Description

Technical field [0001] The invention relates to a three-phase to single-phase converter, in particular to a three-phase to single-phase converter used in an electric traction power supply system. Background technique [0002] At present, the electric traction power supply system adopts the power frequency single-phase AC system, and the single-phase load generates a large negative sequence current in the grid system, which seriously damages the power quality transmitted by the grid system and poses a great threat to the safe operation of the grid system. Summary of the invention [0003] In view of the above problems, the present invention provides a three-phase to single-phase converter for use in an electric traction power supply system to reduce negative sequence current generation and improve power quality of the power grid. [0004] In order to solve the above problems, the technical solution adopted by the present invention is: a three-phase to single-phase converter for an el...

Claims

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Application Information

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IPC IPC(8): H02M5/45
CPCH02M5/45
Inventor 张伟李晓明尹彭飞任其广
Owner XINFENGGUANG ELECTRONICS TECH CO LTD
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