Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

DCM single-bridge-arm integrated split source inverter control method for photovoltaic grid-connected occasion

A technology of source inverter and control method, applied in the field of control of DCM single bridge arm integrated split source inverter

Active Publication Date: 2020-12-22
NANTONG UNIVERSITY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a DCM single-arm integrated split source inverter control method for photovoltaic grid-connected occasions, which solves the application problem of photovoltaic grid-connected power generation occasions, and can effectively avoid the phenomenon of output waveform over-modulation. High waveform quality and stronger practicability

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
  • DCM single-bridge-arm integrated split source inverter control method for photovoltaic grid-connected occasion
  • DCM single-bridge-arm integrated split source inverter control method for photovoltaic grid-connected occasion
  • DCM single-bridge-arm integrated split source inverter control method for photovoltaic grid-connected occasion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] Such as figure 1 As shown, the embodiment of the present application discloses a control method for a DCM single-arm integrated split-source inverter used in photovoltaic grid-connected applications, such as figure 1 As shown in the figure (a), the photovoltaic grid-connected application uses a DCM single-leg integrated split-source inverter including photovoltaic cells and input filter capacitor C in , Input filter inductance L in , a...

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 belongs to the technical field of electricity, and particularly relates to a DCM single-bridge-arm integrated split source inverter control method for a photovoltaic grid-connected occasion. The method comprises the steps: obtaining the output voltage and current of a photovoltaic cell, obtaining an input voltage reference through an MPPT algorithm, and achieving the MPPT through PIcontrol; obtaining a DC bus voltage, comparing the DC bus voltage with a reference, and outputting an amplitude instruction through PI control; obtaining power grid voltage, and calculating to obtainunit sinusoidal signals with the same frequency and phase as the power grid voltage; multiplying the unit sinusoidal signal by the amplitude instruction to obtain a sinusoidal reference; obtaining a grid current, comparing the grid current with a sine reference, and realizing sine and pure active output of the grid-connected current through PI control. By means of the method, the DCM single-bridge-arm integrated split source inverter can be applied to photovoltaic grid-connected occasions, output waveform overmodulation during light-load operation can be effectively avoided, and the output waveform quality is high. In addition, the invention provides an input filter inductor design method, which can ensure smooth implementation of the control method in the whole working range.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a control method for a DCM single-bridge integrated split-source inverter, and in particular to a control method for a DCM single-bridge integrated split-source inverter applied to photovoltaic grid-connected applications. Background technique [0002] In order to meet the voltage level requirements of electrical equipment or power grids, distributed photovoltaic power generation systems generally adopt a two-stage structure of Boost converter cascaded Voltage Source Inverter (Voltage Source Inverter, VSI). This solution can better adapt to the wide variation range of the input voltage, and the control is relatively simple, but the number of power devices is large, and the overall efficiency is difficult to further improve. In recent years, some scholars have proposed a single-leg integrated split-source inverter, which inputs the filter inductor L in The midpoint of a bridg...

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
IPC IPC(8): H02M7/5387H02M7/5395H02J3/38
CPCH02J3/381H02M7/53871H02M7/5395H02J2300/26Y02E10/56
Inventor 秦岭沈家鹏段冰莹许兴周磊高娟田民钱天泓马宇昂
Owner NANTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com