Photovoltaic system-used cascaded multi-bootstrap DC-DC converter

A DC-DC and photovoltaic system technology, applied in photovoltaic power generation, control/regulation systems, DC power input conversion to DC power output, etc., can solve problems such as unrealizable, high voltage gain, low efficiency, etc., and achieve boost performance Effects of increasing, increasing voltage gain, and improving boosting capability

Active Publication Date: 2018-08-21
SOUTHEAST UNIV
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photovoltaic system-used cascaded multi-bootstrap DC-DC converter
  • Photovoltaic system-used cascaded multi-bootstrap DC-DC converter
  • Photovoltaic system-used cascaded multi-bootstrap DC-DC converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0024] The specific embodiment of the present invention discloses a cascaded multi-bootstrap DC-DC converter for photovoltaic systems, such as figure 1 shown, including the input supply V in , input supply V in The positive connection of the inductance L 1 at one end, the inductance L 1 The other ends are connected to the freewheeling diode D 1 anode and freewheeling diode D 2 anode of the freewheeling diode D 1 The cathodes of the coupled inductors are respectively connected to the primary winding L of the coupled inductor 2 One end of the capacitor C 1 One end and the clamping capacitor C b One end of the coupled inductor primary winding L 2 The other ends are connected to the freewheeling diode D 4 The anode, capacitor C 3 One end of the freewheeling diode D 2 The cathode and the drain of the switching tube S, the capacitor C b The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a photovoltaic system-used cascaded multi-bootstrap DC-DC converter. The photovoltaic system-used cascaded multi-bootstrap DC-DC converter comprises an input power supply Vin;the positive electrode of the input power supply Vin is connected with one end of an inductor L1; the other end of the inductor L1 is respectively connected with the anode of a fly-wheel diode D1 andthe anode of a fly-wheel diode D2; the cathode of the fly-wheel diode D1 is respectively connected with one end of a primary winding L2 of a coupling inductor, one end of a capacitor C1 and one end ofa clamping capacitor Cb; the other end of the primary winding L2 of the coupling inductor is respectively connected with the anode of a fly-wheel diode D4, one end of a capacitor C3, the cathode of the fly-wheel diode D2 and the drain of a switch transistor S; the other end of the capacitor Cb is respectively connected with the cathode of a clamping diode Db and the anode of a fly-wheel diode D3;the other end of the capacitor C3 is respectively connected with the anode of the clamping diode Db and one end of a secondary winding L3 of the coupling inductor; and the other end of the secondarywinding L3 of the coupling inductor is respectively connected with the cathode of the fly-wheel diode D4 and one end of a capacitor C2.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a cascaded multi-bootstrap DC-DC converter for a photovoltaic 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 limitation of parasitic parameters, very...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M1/007Y02E10/56
Inventor 林明耀刘同民艾建
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products