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High-frequency auxiliary converter for D-series high-speed train and control method thereof

A technology of high-frequency auxiliary and control methods, which is applied in the control/regulation system, the conversion of AC power input to DC power output, and the conversion of DC power input to DC power output, etc., which can solve the problems of heavy weight and large volume, and reduce the Effects of mass and volume, high power density, and efficiency improvement

Inactive Publication Date: 2018-11-23
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a high-frequency auxiliary converter for EMUs and its control method, which adopts a series DC / DC chopper and inverter combination circuit high-frequency isolation method, through chopper step-down, does not need to set up a power frequency transformer, has many advantages such as high switching frequency, high efficiency, light weight, etc.

Method used

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  • High-frequency auxiliary converter for D-series high-speed train and control method thereof
  • High-frequency auxiliary converter for D-series high-speed train and control method thereof
  • High-frequency auxiliary converter for D-series high-speed train and control method thereof

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Embodiment 1

[0039] Embodiment 1, a high-frequency auxiliary converter for EMUs, the auxiliary power supply is a new type of high-frequency and high-power cascaded auxiliary power supply, because the soft switching technology and cascaded topology are adopted, the entire system is not sensitive to PWM Modulation and control algorithms are more demanding.

[0040] Such as figure 1As shown, it is the topology diagram of the main circuit used in the auxiliary converter, including series DC / DC chopper circuit 1 (including input filter circuit), series rectification circuit 2, resonant circuit 3, three-phase inverter circuit 4 ;The series DC / DC chopper circuit includes the input reactor LAUX, the filter capacitors CA1, CA2, CA3 and CA4 connected in series with it, and 4 chopping IGBTs (insulated gate bipolar transistors), namely Q1, Q2, Q3 and Q4; the function of the input filter circuit is to filter out the harmonics brought by the grid line voltage, and also to suppress the harmonic influenc...

Embodiment 2

[0043] Embodiment 2. The purpose of the resonant circuit is to realize the zero-current shutdown of the chopper IGBT. The key design is to determine the PWM control of the resonant IGBT. This embodiment is based on the high-frequency auxiliary converter of the EMU described in Embodiment 1. , a corresponding control method is proposed, including the following steps:

[0044] Step A, start the high-frequency auxiliary converter of the EMU, and precharge the capacitors CA1-CA4;

[0045] Step B. After the charging is completed (voltage sensor TV3 detects its voltage value), drive pulses are sent to the chopper IGBT and the resonant IGBT at the same time. The chopper IGBT includes Q1-Q4, and the resonant IGBT includes Q5 and Q6. During the drive pulse process, Including the following control process: the driving pulse width is very narrow in the initial stage;

[0046] (1) PWM phase control of the chopping IGBT and the PWM of the resonant IGBT: the driving pulse of the chopping I...

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Abstract

The present invention discloses a high-frequency auxiliary converter for a D-series high-speed train and a control method thereof. The auxiliary converter comprises a tandem type DC / DC chopper circuit, high-frequency transformers TR 1 and TR 2, a tandem type rectification circuit, a resonance circuit and a three-phase inverter circuit. The tandem type DC / DC chopper circuit is connected with primary sides of the high-frequency transformers TR 1 and TR 2, and secondary sides of the high-frequency transformers TR 1 and TR 2 are connected with the three-phase inverter circuit through the tandem type rectification circuit and the resonance circuit in sequence; In order to realize zero current switching off of a chopping IGBT, the control mode of switching off drive pulse of the chopping IGBT and drive pulse of a resonance IGBT at the same moment is adopted, the chopping IGBT pulse width is adjusted by cascade stability control algorithm, and the resonance IGBT pulse width is a fixed value. According to design of the corresponding topological structure and the control method, a traditional power frequency converter can be directly omitted, system weight and volume are reduced, working frequency and efficiency of an auxiliary system are guaranteed, and high practical value is achieved.

Description

technical field [0001] The invention relates to the technical field of converter control, in particular to a high-frequency auxiliary converter of an EMU and a control method thereof. Background technique [0002] The auxiliary power supply system provides electric energy for all electrical equipment except the traction power system of the EMU, such as air compressors, cooling fans, lighting, broadcasting and other auxiliary equipment. The auxiliary control system of the EMU is the same as the traction control system of the EMU. important part of the group. [0003] With the rapid development of my country's EMU technology, users have put forward higher requirements for EMU vehicles in terms of operational reliability, comfort, energy saving and noise reduction, and more stringent requirements for EMU auxiliary power supply systems, lightweight, High efficiency and high frequency have become the development direction of auxiliary power supply system. [0004] The input volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M3/335H02M7/5387H02M1/36
CPCH02M1/36H02M3/33569H02M7/4807H02M7/5387H02M1/0058H02M1/007Y02B70/10
Inventor 王善芬梁大伟杨其林朱孟祥苏玉琢
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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