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Non-isolated AC/DC power supply system

A technology of power supply system and AC system, which is applied in the direction of AC and DC network circuit layout, electrical components, circuit devices, etc., and can solve problems such as high common mode voltage

Pending Publication Date: 2021-08-20
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of excessively high common-mode voltage on the AC-DC bus in the prior art due to the converter using PWM (pulse width modulation) technology, thereby providing a non-isolated AC-DC power supply system

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  • Non-isolated AC/DC power supply system
  • Non-isolated AC/DC power supply system
  • Non-isolated AC/DC power supply system

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Embodiment Construction

[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention provides a non-isolated AC / DC power supply system, which comprises an AC system, a grounding device, a converter system, a common-mode voltage elimination circuit and a DC system, and is characterized in that a three-phase AC line of the AC system is connected with a three-phase AC line of the converter system, and is connected with a first end, a second end and a third end of the grounding device; a fourth end of the grounding device is connected with the zero line of the AC system and is grounded; and the AC system is also connected with the first end of the common-mode voltage elimination circuit; the direct current side of the AC system is correspondingly connected with the second end and the third end of the common-mode voltage elimination circuit through two direct current buses, and the output end of the common-mode voltage elimination circuit is connected with the direct current system through two common direct current buses. By implementing the invention, the common-mode voltage is eliminated, the quality of the power supply voltage is improved, and the power supply reliability is further improved.

Description

technical field [0001] The invention relates to the field of AC and DC power supply systems, in particular to a non-isolated 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 view 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) supplies 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. [0003] Since the power supply system uses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00
CPCH02J4/00
Inventor 慕小斌陈国富王翔邓占锋赵国亮才志远
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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