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Photovoltaic module inverter

A photovoltaic module and inverter technology, applied in the field of photovoltaic power generation, can solve the problems of low utilization rate of transformer magnetic core, large conduction loss, complex structure, etc., achieve simple structure, small conduction loss, and reduce total harmonics distortion effect

Inactive Publication Date: 2013-04-17
BAODING TIANWEI GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing problems of photovoltaic module inverters in the background technology are: complex structure, low utilization rate of transformer magnetic core, large conduction loss, and low efficiency

Method used

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Embodiment Construction

[0010] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0011] Photovoltaic module inverter, composed of crystalline silicon battery components 1, push-pull DC / DC boost circuit 2, DC / AC power frequency commutation circuit 3, filter circuit 4 and microprocessor circuit 5, crystalline silicon battery components The DC voltage is added to the push-pull DC / DC booster circuit, the MOSFET is driven by high-frequency SPMW, and the rectified sinusoidal output voltage is generated on the output capacitor of the push-pull converter, the two MOSFETs are interleaved, and the DC / AC power frequency The commutation circuit switches at power frequency to convert the rectified output voltage into a sinusoidal voltage; the filter circuit filters out high-frequency switching harmonics to ensure the quality of grid-connected current; the microprocessor circuit samples the voltage and current of the battery components, M...

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Abstract

The invention relates to a photovoltaic module inverter which belongs to the technical field of photovoltaic power generation application. The technical scheme is that the photovoltaic module inverter consists of a crystalline silicon battery pack (1), push-pull type direct current (DC) / DC booster circuits (2), a DC / alternating current (AC) power frequency inverting circuit (3), a filter circuit (4) and a microprocessor circuit (5), wherein two push-pull type metal-oxide-semiconductor field effect transistor (MOSFET) switching tubes (2) alternatively operate, a push-pull type MOSFET is driven by high-frequency sinusoidal pulse width modulation (SPWM), and a rectified sinusoidal output voltage is generated on a capacitance which is output by a push-pull type converter. The DC / AC power frequency inverting circuit is switched on / off based on power frequency, converts a rectified output voltage into a sinusoidal voltage and inputs alternating current electric energy into a power grid. The photovoltaic module inverter has the beneficial effects of simplicity in structure, high utilization rate of a transformer core, low conduction loss, high efficiency and the like.

Description

technical field [0001] The invention relates to a photovoltaic module inverter, which belongs to the technical field of photovoltaic power generation applications. Background technique [0002] At present, solar energy is one of the most direct and clean energy available to human beings, and it is also the basis of the future energy structure. The inverter is an important link in the photovoltaic grid-connected power generation system. Different from the centralized inverter, the photovoltaic module inverter is directly installed on each panel, which has the advantages of high overall power generation efficiency, small size, convenient installation and reliability. High performance, suitable for large-scale production, low cost and other advantages. The problems of the photovoltaic module inverter in the background art are: complex structure, low utilization rate of transformer magnetic core, large conduction loss, and low efficiency. Contents of the invention [0003] T...

Claims

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Application Information

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IPC IPC(8): H02M7/537H02M1/12
CPCY02E10/56
Inventor 武卫革翟志强刘玉龙韩贵胜张晓光车福来
Owner BAODING TIANWEI GRP CO LTD