A micro-source half-bridge converter series micro-grid system

A converter, series-type technology, applied in AC network circuits, AC network load balancing, AC power input conversion to DC power output, etc., can solve the problems of system working conditions and complex control, and achieve high voltage level, redundancy Excellent residual performance and high system capacity

Active Publication Date: 2021-05-18
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the power supply diversity, flexibility and energy conversion efficiency of local loads can be further improved, but the AC-DC hybrid microgrid contains both AC and DC subnets, and the system working conditions and control become more complicated

Method used

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  • A micro-source half-bridge converter series micro-grid system
  • A micro-source half-bridge converter series micro-grid system
  • A micro-source half-bridge converter series micro-grid system

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Embodiment Construction

[0008] Such as figure 1 As shown, a micro-source half-bridge converter series micro-grid system, including photovoltaic micro-source, wind micro-source, energy storage device, AC / DC rectifier circuit, DC / DC conversion circuit, micro-source half-bridge converter The device, filter, load, and transformer are characterized in that the wind power micro-source is connected in parallel to the DC side of the micro-source half-bridge converter after passing through the AC / DC rectifier circuit, and the photovoltaic micro-source is connected in parallel to the micro-source after passing through the DC / DC conversion circuit The DC side of the half-bridge converter, and the energy storage device is connected in parallel to the micro-source DC link, and the output sides of each micro-source half-bridge converter are connected in series in sequence, and are combined in a double-star mode to form a three-phase system, in which each phase is composed of an upper bridge arm and a lower bridge ...

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Abstract

A micro-grid system with micro-source half-bridge converters in series, including photovoltaic micro-sources, wind micro-sources, energy storage devices, AC / DC rectifier circuits, DC / DC conversion circuits, micro-source half-bridge converters, filtering The inverter, load, transformer, wind power and photovoltaic micro-source are connected in parallel to the DC side of the micro-source half-bridge converter through the AC / DC rectifier circuit or DC / DC conversion circuit, and the energy storage device is connected in parallel to the micro-source DC link. , the output side of each micro-source half-bridge converter is sequentially connected in series, and a three-phase system is built by a double-star combination, in which each phase is composed of two bridge arms, and each bridge arm is composed of N One or n power generating sub-modules are connected in series with an inductor, 2≤N≤50, N=n.

Description

technical field [0001] The invention relates to a series micro-grid system of a micro-source half-bridge converter. Background technique [0002] Energy shortage and environmental pollution in today's society are common problems worldwide. The distributed power generation technology developed under this background is becoming more and more mature, with the advantages of less pollution and flexible installation locations. However, the access of a large number of distributed power sources with different characteristics (especially renewable energy such as wind energy and solar energy with significant randomness and intermittent nature) will have a certain impact on the stability, power quality and protection of the power system. . Microgrid technology provides an effective way to solve the grid connection problem of a large number of distributed power sources, and has also become an important means to optimize the traditional grid structure. [0003] At present, there are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32H02M7/797
CPCH02J3/383H02J3/386H02J3/32H02M7/797H02J3/388Y02E10/56Y02E10/76Y02E70/30
Inventor 王兴贵王海亮杨维满李晓英薛晟
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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