Mixed traction power supply equipment and control method
A traction power supply and control method technology, applied in the direction of output power conversion devices, electrical components, power lines, etc., can solve the problems of large output voltage fluctuations, cost increases, large fluctuations in DC voltage, etc., to achieve the suppression of DC voltage rise, The effect of preventing DC voltage drop, reducing harmonics and reactive power
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[0028] figure 1 In this embodiment, the rated value of the DC output voltage is 750V, and the entire power supply device is composed of a 24-pulse diode rectifier unit, a PWM rectifier unit and a central controller.
[0029] figure 2 It is the circuit diagram of the 24-pulse diode rectifier unit in this embodiment, which includes 2 three-winding phase-shifting rectifier transformers and 4 diode rectifier bridges. The rectifier transformer adopts epoxy resin cast dry-type transformer, the input voltage of the primary side of the transformer is 10kV, and the output voltage of the secondary side is 610V. The transformer connection method adopts Dy11d0. In order to realize the 24-pulse rectification output, the two transformer primary sides need to be connected with the extended side delta.
[0030] image 3 It is the circuit diagram of the PWM rectifier unit in this embodiment. The PWM rectifier unit only includes a three-winding dry-type transformer and two PWM rectifier units....
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