Auxiliary convertor and parallel connection control method thereof

A technology of auxiliary converter and control method, applied in power transmission AC network, parallel feeding arrangement of single network, electrical components, etc., can solve the problem of high cost of high-power converter, control and design of parallel system of auxiliary converter Complex, difficult installation and other problems, to achieve the effect of improving reliability and maintainability, shortening production and development cycles, and solving reliability

Active Publication Date: 2013-03-20
LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI +1
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Problems solved by technology

The centralized power supply system of a single high-power auxiliary converter has the following disadvantages: first, the cost of high-power converter is high;
In addition, even if the sine waves output by the auxiliary converters have the same amplitude, same frequency, same phase, and same phase sequence, the harmonic content of the sine waves output by each is different, and there is a harmonic circulating current between the auxiliary converters
Therefore, the control and design of the auxiliary converter parallel system is quite complicated

Method used

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  • Auxiliary convertor and parallel connection control method thereof
  • Auxiliary convertor and parallel connection control method thereof
  • Auxiliary convertor and parallel connection control method thereof

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] The design idea of ​​the present invention is that in the auxiliary converter parallel system, each auxiliary converter samples and processes the output of the current auxiliary converter, and combines the output voltage sampling information of the parallel bus to obtain the current The output control quantity of the auxiliary converte...

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Abstract

An auxiliary convertor comprises an inverter and an auxiliary convertor output control device, wherein the inverter converts direct currents into alternating currents, and the auxiliary convertor output control device carries out sampling and processing to output of the inverter and controls the output voltage of the inverter by combining output voltage sampling information of a parallel bus. The auxiliary convertor is suitable for locomotives, motor train units, subways and inter-city trains.

Description

technical field [0001] The invention relates to train equipment, in particular to an auxiliary converter for a high-speed EMU and a parallel control method thereof. Background technique [0002] The auxiliary converter on the high-speed EMU is to invert the 3000 volt (V) direct current in the middle link of the traction converter into a three-phase 440V, 60 Hz (Hz) alternating current and charge the three-phase load and charge on the high-speed EMU. Power electronic equipment powered by machines, etc. Auxiliary converters are the main power supply equipment on high-speed EMUs. They are related to the operation performance of high-speed EMUs and require high power supply and high reliability. Therefore, it is very important to improve the feasibility of power supply. [0003] The high-power auxiliary converter power supply system has two configuration methods: one is to use a single high-power auxiliary converter for centralized power supply, and the other is to install an a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/00H02J3/38H02J3/36
CPCY02E60/60
Inventor 姜雪松马颖涛王永翔杨宁
Owner LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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