Double-asymmetric-structure high-boost converter suitable for photovoltaic power generation system

A photovoltaic power generation system, asymmetric technology, applied in the field of boost converter, can solve problems such as unrealizable, high voltage gain, low efficiency, etc., to achieve the effect of improving work efficiency, boosting capacity, and superior work efficiency

Inactive Publication Date: 2018-06-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, due to the limitation of parasitic parameters, very high voltage gain cannot be achieved
If a cascaded topology is used, the problem of low efficiency caused by the increase in the number of devices will be highlighted again.

Method used

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  • Double-asymmetric-structure high-boost converter suitable for photovoltaic power generation system
  • Double-asymmetric-structure high-boost converter suitable for photovoltaic power generation system
  • Double-asymmetric-structure high-boost converter suitable for photovoltaic power generation system

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Embodiment Construction

[0022] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0023] The first specific embodiment discloses a high-boost converter with double asymmetric structure suitable for photovoltaic power generation systems, such as figure 1 shown, including the input supply V in , input supply V in The positive poles of the inductors are respectively connected to L 1 One end and the capacitor C 2 at one end, the inductance L 1 The other ends are connected to the freewheeling diode D 2 The anode of the freewheeling diode D 4 anode and capacitor C 3 One end of the capacitor C 2 The other ends are connected to the freewheeling diode D 4 cathode and freewheeling diode D 3 anode of the freewheeling diode D 3 The cathodes are connected to the capacitor C 3 The other end of the freewheeling diode D 1 anode of the freewheeling diode D 1 The cathodes are connected to the cap...

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Abstract

The invention discloses a double-asymmetric-structure high-boost converter suitable for a photovoltaic power generation system. A circuit structure without a transformer is used. Compared with a traditional boost circuit, the loss of the transformer is avoided on the basis that the boost capacity is remarkably improved, and the work efficiency of the circuit is remarkably improved. A double-asymmetric boost unit is fused on the basis of a cascaded boost converter, and compared with a traditional symmetric-structure boost unit, the converter has excellent voltage boost performance along with increase of the duty ratio. When the duty ratio of the converter is high, the boost capacity and the work efficiency of a circuit have excellent advantages; compared with a traditional boost converter,the high-boost converter is more suitable for use on medium-and-high power occasions.

Description

technical field [0001] The invention relates to a boost converter, in particular to a double asymmetric structure high boost converter suitable for a photovoltaic power generation system. Background technique [0002] With the depletion of traditional fossil energy and the deteriorating environment of human beings, the development of clean renewable energy is imminent. All countries in the world are committed to the research and development of new energy applications, of which solar energy and wind energy have been obtained a wider range of applications. However, for these systems, how to operate grid-connected and meet the high voltage requirements in the grid is still the most important issue. At present, a large number of boost converters have been developed to meet these applications. Among different converters, the traditional BOOST converter can theoretically increase the voltage gain by increasing the duty cycle. However, in practical applications, due to the limita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
CPCY02E10/56H02M3/07
Inventor 林明耀艾建刘同民
Owner SOUTHEAST UNIV
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