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DCDC converter in photovoltaic power generation system

A photovoltaic power generation system and converter technology, applied in the field of converters, can solve the problems of small voltage conversion range and inability to meet the needs of photovoltaic power generation systems, and achieve the effect of wide adjustment range

Inactive Publication Date: 2014-02-19
JIANGSU LVYANG ELECTRONICS INSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the classic Buck-Boost circuit, due to its small voltage conversion range, it cannot meet the needs of this independent photovoltaic power generation system

Method used

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  • DCDC converter in photovoltaic power generation system
  • DCDC converter in photovoltaic power generation system
  • DCDC converter in photovoltaic power generation system

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Embodiment Construction

[0011] Such as figure 1 As shown, the DCDC converter in the photovoltaic power generation system of the present invention includes an input terminal Ui and an output terminal Uo, the input terminal Ui is respectively connected to the source of the capacitor C1 and the MOS transistor Q1, and the drain of the MOS transistor Q1 is respectively connected to the cathode of the diode D1, One end of the inductor L1 and the other end of the inductor L1 are respectively connected to the source of the MOS transistor Q2, the anode of the diode D2 is connected to one end of the inductor L2, the other end of the inductor L2 is connected to the capacitor C2, and the capacitor C2 is connected to the output terminal Uo and respectively connected to the anode of the diode D1 , The drain of the MOS transistor Q1 is connected.

[0012] DC-DC conversion is to convert a fixed DC voltage into a variable DC voltage, also known as DC chopping. There are two working modes of the chopper, one is the p...

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Abstract

The invention relates to a converter in a power generation system, in particular to a DCDC converter in a photovoltaic power generation system. The DCDC converter in the photovoltaic power generation system comprises an input end Ui and an output end Uo and is characterized in that a capacitor C1 and the source electrode of a MOS transistor Q1 are respectively connected with the input end Ui; the negative electrode of a diode D1 and one end of an inductor L1 are respectively connected with the drain electrode of the MOS transistor Q1; the other end of the inductor L1 is connected with the source electrode of a MOS transistor Q2; the positive electrode of a diode D2 is connected with one end of an inductor L2, and the other end of the inductor L2 is connected with a capacitor C2; the capacitor C2 is connected to the output end Uo and connected with the positive electrode of the diode D1 and the drain electrode of the MOS transistor Q1. According to the DCDC converter in the photovoltaic power generation system, a double-switch Buck-Boost circuit of a hardware current conversion mode is adopted, the adjustable range of input and output voltage of the double-switch Buck-Boost circuit is wide, and therefore the DCDC converter is applicable to occasions where the change range of voltage is wide.

Description

technical field [0001] The invention relates to a converter in a power generation system, in particular to a converter in a photovoltaic power generation system. Background technique [0002] In independent photovoltaic power generation systems and wind power generation systems, MPPT and DC-DC conversion are very important links, which can ensure the continuity and high efficiency of power supply of the entire power generation system. As a DC-DC converter, Buck-Boost can well meet the voltage conversion requirements of photovoltaic power generation and wind power generation due to its advantages of high conversion efficiency, long life, and maintenance-free. For the classic Buck-Boost circuit, due to its small voltage conversion range, it cannot meet the needs of this independent photovoltaic power generation system. Contents of the invention [0003] The technical effects of the present invention can overcome the above defects, and provide a DCDC converter in a photovolt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCY02E10/56
Inventor 蔡习荣高显扬
Owner JIANGSU LVYANG ELECTRONICS INSTR GROUP
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