Phase shift soft switch high frequency isolation photovoltaic grid-connected inverter

A high-frequency isolation and soft-switching technology, used in photovoltaic power generation, AC network circuits, high-efficiency power electronic conversion, etc. The effect of wave, high operating efficiency

Active Publication Date: 2012-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The power frequency transformer isolation type is a single-stage structure, good stability, electrical isolation, and no DC component, but it is bulky and heavy, and the power frequency transformer has high cost and large loss

Method used

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  • Phase shift soft switch high frequency isolation photovoltaic grid-connected inverter
  • Phase shift soft switch high frequency isolation photovoltaic grid-connected inverter
  • Phase shift soft switch high frequency isolation photovoltaic grid-connected inverter

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Embodiment Construction

[0057] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. However, the implementation method and scope of protection of the present invention are not limited thereto.

[0058] Such as figure 1 Shown is the structure block diagram of phase-shift soft-switching high-frequency isolated photovoltaic grid-connected inverter. A phase-shift soft-switching high-frequency isolated photovoltaic grid-connected inverter is composed of a main circuit, a DSP control circuit, an ARM control circuit, and an auxiliary switching power supply circuit. The main circuit is composed of EMI filter module, drive protection module, phase-shift soft switch high-frequency isolation module (including high-frequency full-bridge phase-shift module, relay, high-frequency transformer, rectifier filter module), high-low frequency full-bridge inverter module, output Filter module, island effect protection module; DSP cont...

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Abstract

The invention relates to a phase shift soft switch high frequency isolation photovoltaic grid-connected inverter which comprises a main circuit, a DSP control circuit, an ARM control circuit, and an auxiliary switch power supply circuit. The invention firstly provides a full digitalization control photovoltaic grid-connected generating system, wherein a high frequency full bridge phase shift circuit combined with a high and low frequency full bridge inverter circuit is main circuit structure, and high speed embedded digital signal processor DSPTMS320F2808 is a core. Maximal power point tracking of solar cell panel output power and isolation of photovoltaic direct current and electrical network alternating current are realized, software realizes phase-locked loop control, perfect grid-connected and islanding protection functions are provided, and the whole system can operate safely and reliably.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic grid-connected power generation, in particular to a solar photovoltaic grid-connected inverter. Background technique [0002] Energy is an important material basis necessary for the development of the national economy and people's lives, and it is also the driving force for promoting social and economic development and improving people's living standards. Today, energy issues have risen to a national strategic research priority. With the overall development of global industrialization, the demand for energy in various industries in various countries has expanded rapidly, and the amount of energy demand has become the standard for measuring the economic development of a country or region. [0003] In view of the above situation, the development and utilization of renewable energy and various green energy to achieve sustainable development has become a measure that human society must take. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02J3/00
CPCY02B70/1491Y02E10/56Y02B70/10
Inventor 薛家祥张思章钟良文张红卫
Owner SOUTH CHINA UNIV OF TECH
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