Hybrid parallel type high-voltage direct current traction power supply current transformer and control method thereof

A high-voltage direct current, traction power supply technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, irreversible AC power input conversion to DC power output, etc., can solve resistance consumption, catenary network voltage drop Large size, short distance between power supply stations, etc., to achieve the effect of reducing DC output voltage ripple and AC current harmonics, increasing DC output voltage, and reducing catenary loss
CN102394557AInactive Publication Date: 2012-03-28TSINGHUA UNIV +1
3 Cites 31 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2012-03-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a hybrid parallel type high-voltage direct current traction power supply current transformer and a control method thereof. The hybrid parallel type high-voltage direct current traction power supply current transformer is characterized by comprising a set of pulse width modulation (PWM) rectifier units and a set of diode rectifier units, wherein both an input end of the PWM rectifier units and an input end of the diode rectifier units are connected with an alternating current electric network, and an output end of the PWM rectifier units and an output end of the diode rectifier units are connected in parallel to realize high-voltage direct current output. Because the PWM rectifier units and the diode rectifier units are connected in series, the direct current output voltage of the entire current transformer is improved, the power supply distance is prolonged, and the contact net loss is reduced. Meanwhile, equipment investment is reduced, and the reliability of a system is improved. The hybrid parallel type high-voltage direct current traction power supply current transformer and the control method thereof can be widely applied to urban railway transit traction power supply systems.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a high-voltage direct current traction power supply conversion device and a control method thereof, in particular to a hybrid parallel high-voltage direct current traction power supply conversion device and a control method for supplying power to urban rail transit vehicles. Background technique

[0002] At present, the traction power supply conversion device of urban rail transit in my country still uses diode rectifiers, and the power supply voltage is 750V or 1500V. This power supply method has been used for decades. Its biggest advantage is that the device structure is simple and the technology is relatively mature. However, this traditional power supply scheme also has the following problems: 1. Due to the use of diode rectifiers, the energy can only be unidirectional Therefore, the energy generated by vehicle braking cannot be fed back to the grid, and is usually consumed by resistors, resulting in a great waste of energy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More