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Photovoltaic micro-inverter power generation system based on multi-winding high-frequency magnetic coupling system

A power generation system, magnetic coupling technology, applied in the direction of photovoltaic power generation, electrical components, output power conversion devices, etc., can solve the problems of large volume, low efficiency, high noise, etc., achieve the effect of small volume, high power generation efficiency, and improved quality

Active Publication Date: 2014-07-09
泓浒(苏州)半导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the distributed inverter topology using power frequency transformers has a simple structure and good impact resistance, it also has disadvantages such as large volume, heavy weight, high noise and low efficiency.

Method used

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  • Photovoltaic micro-inverter power generation system based on multi-winding high-frequency magnetic coupling system
  • Photovoltaic micro-inverter power generation system based on multi-winding high-frequency magnetic coupling system
  • Photovoltaic micro-inverter power generation system based on multi-winding high-frequency magnetic coupling system

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Embodiment Construction

[0033] figure 1 is a schematic topological diagram of a photovoltaic micro-inverter power generation system according to an embodiment of the present invention. Such as figure 1 As shown, the embodiment of the present invention provides a photovoltaic micro-inverter power generation system based on a multi-winding high-frequency magnetic coupling system, which includes a grid-connected system, multiple photovoltaic panels and a control unit. The grid-connected system includes multiple boost topologies, multiple bus capacitors C 1 , multiple H-bridge inverter circuits and a multi-winding transformer and a back-to-back H-bridge inverter circuit. The number of photovoltaic panels, the number of boost topologies, the number of bus capacitors and the number of H-bridge inverter circuits are consistent.

[0034] Specifically, each photovoltaic panel is connected to a boost topology. Each boost topology connects a bus capacitor C 1 . Each bus capacitance C 1 An H-bridge invert...

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Abstract

The invention relates to a photovoltaic micro-inverter power generation system based on a multi-winding high-frequency magnetic coupling system. The photovoltaic micro-inverter power generation system comprises a grid-connected system, a plurality of photovoltaic cell panels and a control unit, wherein each photovoltaic cell panel is connected to a bus capacitor through a boost topology; each bus capacitor is connected with a primary side winding of a multi-winding transformer through an H bridge inverter circuit; a secondary side winding of the multi-winding transformer is connected with a back-to-back H bridge inverter circuit; the control unit is set to be in information interaction with the grid-connected system, so that the voltages of the multiple bus capacitors are balanced, the voltages of the direct-current bus capacitors are balanced and the power grid side input power factor is 1, and the back-to-back H bridge inverter circuit is controlled to output alternating current of power frequency. The photovoltaic micro-inverter power generation system is small in size, light in weight, low in cost and capable of independently controlling each photovoltaic cell panel to track largest power points, has remarkable economic benefits and thus is suitable for popularized application.

Description

technical field [0001] The invention relates to the topological structure of a photovoltaic micro-inverter, in particular to a photovoltaic micro-inverter power generation system based on a multi-winding high-frequency magnetic coupling system. Background technique [0002] Photovoltaic inverter is the most important link in the process of photovoltaic panel power generation and grid connection. Its efficiency, cost and stability are all important factors that determine whether the photovoltaic industry can flourish. The new grid-connected inverter topology can improve the efficiency of solar energy utilization, thereby shortening the cost recovery cycle, making it possible to popularize photovoltaic inverter power generation on a large scale. [0003] However, during the power generation process of the photovoltaic inverter power generation system, due to the inevitable existence of different installation angles and different orientation angles for each photovoltaic panel i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02M7/5387
CPCY02E10/56
Inventor 王祎林坚李宏王彭
Owner 泓浒(苏州)半导体科技有限公司
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