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High-power medium voltage direct current power supply device and control method

A technology of DC power supply and power supply device, which is applied to the conversion device of output power, the conversion of AC power input to DC power output, electrical components, etc., can solve the problems of high equipment cost, poor power factor, uncontrollable output voltage, etc. The effect of strong anti-interference ability, reducing ripple factor and improving power factor

Pending Publication Date: 2018-11-02
中国船舶重工集团公司第七〇三研究所无锡分部
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AI Technical Summary

Problems solved by technology

[0003] At present, almost all practical medium-voltage high-power power-frequency rectifier power supplies either use diode rectification, the output voltage is uncontrollable, the input current has large harmonics, and the power factor is low; , but as the phase-shift pulse moves backward, its power factor will become worse and worse; or use IGBT pulse width modulation, although the output voltage can be controlled and the power factor can be improved, but the equipment cost is very high, Low reliability and complicated control loop

Method used

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  • High-power medium voltage direct current power supply device and control method
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  • High-power medium voltage direct current power supply device and control method

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Embodiment Construction

[0044] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] Such as figure 1 As shown, a high-power medium-voltage DC power supply device includes an input switch cabinet, a rectifier transformer, a rectifier, and an output DC isolation cabinet.

[0046] The input voltage of the medium voltage DC power supply device is AC10.5kV, and the output voltage is DC±2kV.

[0047] The input switch cabinet is mainly composed of high-voltage circuit breakers, voltage sensors, current sensors, over-voltage protectors, comprehensive protection devices and other equipment. The input switch cabinet is mainly used for the input / removal of AC10.5kV power supply and real-time monitoring of AC10.5kV voltage lines It can automatically cut off AC10.5kV...

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Abstract

The invention discloses a high-power medium voltage direct current power supply device and a control method thereof. The device comprises an input switch cabinet, a rectifier transformer, a rectifier,and an output direct current isolation cabinet, wherein the input voltage of the medium voltage direct current power supply device is AC10.5kV, and the output voltage is DC+ / -2kV. The high-power medium voltage direct current power supply device and the control method provided by the invention may realize the advantages of controllable output voltage, improvement of power factors and improvement of reliability.

Description

Technical field [0001] The invention relates to the field of medium voltage direct current power supply devices, and in particular to a high-power medium voltage direct current power supply device and a control method. Background technique [0002] The global industrialized information economy has a huge demand for rectified power supplies. In the field of medium voltage and high power, the industrial frequency rectifier power supply has the advantages of strong adaptability to the power supply environment, high reliability, and strong shock load resistance, and has been widely used in various industries. [0003] At present, almost all practical medium-voltage high-power industrial frequency rectifier power supplies use diode rectification, with uncontrollable output voltage, high input current harmonics and low power factor; or use SCR phase shift control, although the output voltage is controllable , But with the backward shift of the phase shift pulse, its power factor will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/155H02M7/162H02M1/14H02M1/42
CPCH02M1/14H02M1/4233H02M7/1557H02M7/1626Y02B70/10
Inventor 俞希学张嵩彪苏凯胡聪周杰
Owner 中国船舶重工集团公司第七〇三研究所无锡分部
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