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Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid

A technology of traction power supply system and regenerative braking, which is applied in the direction of electric braking system, electric traction, electric vehicles, etc., can solve the problem of high investment, simplify the transformation process, reduce the total harmonic distortion rate, and ensure safety and reliability sexual effect

Inactive Publication Date: 2010-01-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of a four-quadrant converter with the same capacity is much higher than that of an AC-DC conversion device composed of a diode uncontrolled rectifier and a thyristor phase-controlled rectifier.
Therefore, the investment of replacing the AC-DC conversion device composed of a diode uncontrolled rectifier and a thyristor phase-controlled rectifier in series in the existing maglev train traction power supply system with a four-quadrant converter of the same capacity is relatively high

Method used

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  • Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid
  • Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid
  • Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid

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Embodiment Construction

[0024] see figure 1 As shown, this is an operation overview of applying the present invention on a long trunk line. The maglev traffic in this double-track operation has an uplink and a downlink. Therefore, an uplink section and a downlink section are formed between two stations. Each substation is equipped with an AC / DC two-way power transmission module in the maglev traction power supply system that can feed back braking energy to the grid. The AC / DC two-way power transmission module operates separately through four DC / AC inverter modules centering on a station. The train loads on the two uplink sections and the two downlink sections on both sides of the station are supplied with power, so as long as substations are arranged at intervals along the line according to the sequence of stations.

[0025] figure 2 For the maglev traction power supply system of the present invention, namely figure 1 The AC / DC module and the DC / AC module in it, the AC / DC module is the AC-DC conv...

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Abstract

The invention relates to a magnetic-suspension tractive power supply system capable of feeding the braking energy back to a power grid, which belongs to power supply and comprises an original AC-DC conversion device and a four-quadrant converter, wherein the volume of the four-quadrant converter is below the half of the volume of the AC-DC conversion device; the AC end of the four-quadrant converter is respectively connected with the power grid and the AC end of the AC-DC conversion device, and the DC end of the four-quadrant converter is connected with the DC end of the AC-DC conversion device; a control device comprising a voltage sensor, a current sensor, a single chip or a digital signal processor is arranged to control the four-quadrant converter according to the following procedures: 1. detecting electric current at the AC side of the AC-DC conversion device; 2. judging whether the DC bus-bar voltage of the AC-DC conversion device is larger than a preset value or not; 3. starting up the four-quadrant converter to enter an inversion state when the DC bus-bar voltage is larger than the preset value; 4. detecting the input power of the four-quadrant converter; 5. judging whether the input power is positive or negative; 6. powering off the four-quadrant converter if the input power is positive; and 7. returning to the procedure 1.

Description

Technical field: [0001] The invention belongs to power supply, in particular to a maglev traction power supply system capable of feeding back train braking energy to a grid. Background technique: [0002] The traction power supply system of the high-speed maglev train currently in demonstration operation uses an AC-DC conversion device composed of a diode uncontrolled rectifier and a thyristor phase-controlled rectifier and a series-connected inverter. Since the traction power supply system composed of this AC-DC conversion device and series inverters cannot feed back the regenerated electric energy to the grid for other uses during the train braking process, only high-power resistors can be installed on the train As a braking load, a large amount of regenerative energy is discharged through the resistor. The advantage of using this method of resistor discharge to eliminate the energy generated by braking is that it is simple and easy to implement, but it consumes a large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L13/10B60L7/14H02N15/00
CPCY02T10/7241Y02T10/72
Inventor 杨中平郑琼林游小杰林飞孙湖郝瑞祥黄先进张立伟贺明智王琛琛史黎明方华
Owner TONGJI UNIV
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