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Photovoltaic grid-connected micro inverter

A micro-inverter and photovoltaic technology, applied in the field of circuit devices or systems, can solve the problems of low conversion efficiency, low reliability, and large volume.

Inactive Publication Date: 2015-05-27
牛誉博
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are still some problems; such as: low conversion efficiency, low reliability, short life, large volume, low cost and high cost, etc.

Method used

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  • Photovoltaic grid-connected micro inverter

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Embodiment Construction

[0010] As shown in the figure, the present invention includes a flyback converter module, an amplifier module, a comparator module, a hybrid steering module, an all-digital control platform and a digital PI controller, and is characterized in that: said flyback converter module, amplifier Module, comparator module, hybrid steering module, full digital control platform and digital PI controller are connected in sequence.

[0011] The all-digital control platform of the present invention adopts the DSC control chip MC56F8257 based on the core of DSP56800E.

[0012] The present invention adopts the DSC control chip MC56F8257 based on DSP56800E core released by Freescale in 2010. The chip has the characteristics of both DSP and MCU, and contains rich peripheral equipment. It uses compact assembly and C language to compile code, which greatly improves the development efficiency of R&D personnel. It can perform complex algorithm operations and the cost of system hardware platf...

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PUM

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Abstract

A photovoltaic grid-connected micro inverter belongs to the technical field of power supply or distribution circuit devices or systems, is an electric energy storage system, and especially relates to the improvement of a circuit device structure of an alternating-current main line or an alternating-current distribution network. The invention provides a photovoltaic grid-connected micro inverter with high conversion efficiency, high reliability, long service life, small size and low cost. The photovoltaic grid-connected micro inverter comprises a fly-back converter module, an amplifier module, a comparator module, a hybrid steering device module, a full-digital control platform and a digital PI controller, and is characterized in that the fly-back converter module, the amplifier module, the comparator module, the hybrid steering device module, the full-digital control platform and the digital PI controller are connected in sequence.

Description

technical field [0001] The invention belongs to a circuit device or system for power supply or distribution; an electric energy storage system, and in particular relates to an improvement of a circuit device structure of an AC main line or an AC power distribution network. Background technique [0002] At present, the application of photovoltaic power generation system can be divided into the following two categories: independent off-grid photovoltaic power generation system and grid-connected photovoltaic power generation system. The former is not connected to the public grid, and the battery is charged through the output inverter controller or the output electric energy is directly supplied to the user load. Its common application is to provide electric energy for special places such as remote mountainous areas or areas without grid power supply, border posts, and weather stations. Different from the independent off-grid photovoltaic power generation system, the grid-conn...

Claims

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Application Information

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IPC IPC(8): H02M7/44
CPCH02M7/48H02M1/0012Y02E10/56
Inventor 牛誉博秦曦阳
Owner 牛誉博
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