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High-compatibility AC/DC hybrid power distribution system

A technology of AC-DC hybrid and power distribution system, applied in AC network circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor controllability and strong randomness of distributed power generation, so as to save electric energy, improve power supply reliability, The effect of improving controllability

Inactive Publication Date: 2019-08-16
STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Distributed power generation can realize the effective use of renewable energy and has good compatibility with the environment. However, distributed power generation has the characteristics of strong randomness and poor controllability. Microgrid provides an effective way to solve this contradiction.

Method used

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Embodiment Construction

[0026] A high-compatibility AC / DC hybrid power distribution system. The rectifier converter, photovoltaic converter, and the bidirectional converter of the energy storage unit are connected in parallel to the 600V DC bus. The 600V DC bus is connected to the 220V DC bus through a step-down converter, and To supply power to the system such as the DC central air conditioner, the 220V DC bus powers the DC load through the isolation converter, and the conventional AC load is connected to the 380VAC or 220VAC AC power supply bus according to the actual situation, which is sensitive to inverters or data center computers. The load is supplied through the corresponding three-phase or single-phase uninterruptible power supply UPS.

[0027] The DC side and the AC side are connected through an AC / DC rectifier converter to realize the rectification power supply from the AC side to the DC side. The rectification adopts the Vienna rectifier converter.

[0028] The photovoltaic converter adopts th...

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Abstract

The invention discloses a high-compatibility AC / DC hybrid power distribution system characterized in that a rectifier converter, a photovoltaic converter, and an energy storage unit bidirectional converter are connected in parallel to a 600V DC bus; the 600V DC bus is connected to a 220V DC bus through a step-down converter and supplies power to a DC central air conditioner and the like in the system; the 220V DC bus supplies power to a DC load through an isolation converter; a conventional AC load is connected to a 380VAC or 220VAC AC power bus according to an actual situation. A sensitive load similar to a frequency converter or data center computer is powered by a corresponding three-phase or single-phase UPS. The high-compatibility AC / DC hybrid power distribution system works well.

Description

Technical field [0001] The invention relates to a compatible AC-DC hybrid power distribution system. Background technique [0002] Distributed power generation can realize the effective use of renewable energy and is compatible with the environment. However, distributed power generation has the characteristics of strong randomness and poor controllability. Microgrid provides an effective way to solve this contradiction. The microgrid in the traditional sense is divided into AC microgrid, DC microgrid, and AC / DC hybrid microgrid. In the actual application process, AC microgrid and DC microgrid will have the disadvantage of using a large number of power electronic converters. Since the microgrid has two types of AC and DC busbars, if combined with appropriate voltage levels and structural design, it can greatly reduce the demand for power electronic converters and achieve compatible power supply for almost all conventional loads at present. Summary of the invention [0003] The pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J5/00H02J3/38
CPCH02J3/385H02J5/00H02J9/062Y02B10/70Y02E10/56
Inventor 李秋实汤向华李忠严建海陈文波侯丽钢王思怡石金波王华沈凌男张旭姜清哲单逸方焮柠王爽
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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