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AC/DC power supply system

A technology of power supply system and AC system, applied in electrical components, output power conversion devices, etc., can solve problems such as damage to AC and DC loads, and achieve the effect of high power supply voltage quality, high engineering application value, and low hardware cost

Active Publication Date: 2021-08-13
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the common-mode voltage generated by the converter using PWM (pulse width modulation) technology may damage the AC and DC loads, thereby providing an AC and DC power supply system

Method used

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Embodiment

[0032] The embodiment of the present invention provides an AC and DC power supply system, which is applied to occasions where common mode voltage needs to be eliminated, such as figure 1 As shown, it includes: a converter system 1, an AC system 2, a common-mode voltage elimination circuit 3, a grounding device 4, and multiple DC buses.

[0033] Such as figure 1 As shown, the three-phase AC lines (phase A, phase B, and phase C) of the AC system 2 are respectively connected to the three-phase AC lines (phase A, phase B, and phase C) of the converter system 1, and are connected to the common-mode voltage elimination circuit The first terminal, the second terminal and the third terminal of 3 are connected, and the first terminal, the second terminal and the third terminal of the grounding device 4 are connected at the same time; the fourth terminal of the grounding device 4 is respectively connected to the neutral line of the AC system 2 ( N line) and grounded; the DC side of the...

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Abstract

The invention discloses an AC / DC power supply system characterized in that a grounding device is additionally arranged between an AC system and a converter system, and the grounding device is also connected with a null line and the ground, so that the null line and a grounding point are provided for the conversion system, and the wiring mode of the conversion system is not limited to a three-phase three-wire system; a common-mode voltage elimination circuit is connected to the alternating current side and the direct current side of the conversion system, and the common-mode voltage elimination circuit is not limited to restraining common-mode voltage between the alternating current side and the direct current side of the conversion system; and meanwhile, reverse common-mode voltage of a corresponding proportion is inducted, and the reverse common-mode voltage is connected into a direct current bus and a ground wire loop in series; therefore, the ground common-mode voltage of the conversion system is eliminated.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to an AC and DC power supply system. Background technique [0002] The AC-DC power supply system (or device) is the core component of the AC-DC distribution network, and it plays an important role in power conversion (including voltage level conversion, frequency conversion, AC-DC power supply mode conversion, etc.) and power supply. Its core technology is Power electronics device technology. In actual application design, in order to increase the power density of the device, reduce the manufacturing cost of the device or in consideration of other design factors, the AC side of the device usually uses a high-power three-phase three-wire non-isolated AC / DC converter (AC / DC) to supply power to AC loads, and the DC side of the equipment mostly uses high-power non-isolated DC / DC (DC / DC) converters to supply power to DC loads. However, the power supply wiring method required by AC...

Claims

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Application Information

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IPC IPC(8): H02J5/00H02M1/12
CPCH02J5/00H02M1/126
Inventor 陈国富慕小斌王翔邓占锋赵国亮马明媛
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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