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

A photovoltaic system multi-peak maximum power tracking method and system

A technology of maximum power tracking and photovoltaic systems, applied in photovoltaic power generation, control/regulation systems, instruments, etc., can solve problems such as working points falling into local extreme values, MPPT algorithm's weak global search ability, etc., to avoid global optimization capabilities Not strong, the effect of accurate maximum power point

Active Publication Date: 2017-09-01
ZHEJIANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a photovoltaic system multi-peak maximum power tracking method and system, the tracking method and system can solve the problem that the traditional MPPT algorithm is not strong in global search ability, and it is easy to make the working point fall into the local extremum. The tracking method of the present invention The method has a stronger global optimization ability and will not miss the global optimum

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
  • A photovoltaic system multi-peak maximum power tracking method and system
  • A photovoltaic system multi-peak maximum power tracking method and system
  • A photovoltaic system multi-peak maximum power tracking method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0055] As an optional implementation, the next-generation particle voltage:

[0056]

[0057] Among them, V i (n+1) is the particle voltage at the n+1th iteration, V i (n) is the particle voltage at the nth iteration, u is a random number on (0, 1), a new random number is selected for each calculation, p i is the potential well point of particle i’s current quantum motion in the iteration process, r 1 , r 2 It is a random number on (0, 1), β is the vergence factor, β<1.7.

[0058] Because the size of the vergence factor β is related to the size of the search range of the particle voltage, it is a dynamic adjustment parameter whose value is less than 1.7. The larger β, the better the global performance, and the smaller β, the faster the convergence speed. In the initial stage of iteration, it is hoped that the particles have a large search space, and the global maximum power point will not be missed due to the complex characteristics of the curve; in the later stage o...

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 method and system for multi-peak maximum power tracking of a photovoltaic system. In a successive iterative mode, output voltages of a photovoltaic array are updated one by one, output power is obtained, obtained power is compared so as to determine a working voltage corresponding to a particle maximum power point after the iteration of each particle, maximum power point power of all particles in a particle swarm is compared, a population working voltage corresponding to a population maximum power point in the particle swarm is determined, and thus a multi-peak maximum power point under complex conditions is determined. Thus, it can be seen that according to the tracking method, particles are used in a working interval of voltage to perform quantum behavior search, and the problem that a conventional maximum power point tracking (MPPT) algorithm is not high in global optimization capability and easily causes a working point to fall into local extremum is solved. The maximum power point in the photovoltaic system, which is searched by adoption of the method and the system, is more accurate and more practical.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation engineering, in particular to a multi-peak maximum power tracking method and system for a photovoltaic system. Background technique [0002] Due to partial shadow shading, dust accumulation, and differences in output characteristics of photovoltaic cells in photovoltaic arrays, the output characteristic curve of photovoltaic arrays presents multi-peak power characteristics, and its maximum power tracking problem has become an important direction in the field of photovoltaic power generation research. At present, there are mainly three solutions to the multi-peak maximum power tracking problem disclosed in academic papers and invention patents: (a) one is to use the current compensation method to make the output status of each module in the photovoltaic array under partial shadowing the same, and the multi-peak The output characteristic curve becomes a single-peak curve, so th...

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 Patents(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 李玉玲王一蒙陈予吒
Owner ZHEJIANG UNIV
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