Maximum power tracking method for solar cell

A technology of maximum power tracking and solar cells, applied in photovoltaic power generation, adjusting electrical variables, instruments, etc., can solve the problems of battery charging management contradictions, does not consider the nonlinear problem of the controller, and cannot effectively realize battery charging management and other problems

Active Publication Date: 2013-06-26
BYD CO LTD
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these schemes have the following defects: 1. Solar cell output control realizes solar maximum power tracking, and the maximum power of solar cell can be obtained, but it is not the maximum power of the whole solar power generation system, because the nonlinear problem of the efficiency of the controller itself is not considered. ;2. The maximum power tracking strategy adopted by the current solar controller is not integrated with the loop control strategy of the controller itself, which is contradictory to the charging management of the back-end battery, and cannot effectively realize the scientific charging management of the battery

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
  • Maximum power tracking method for solar cell
  • Maximum power tracking method for solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0022] figure 1 It is a flow chart of the solar cell maximum power tracking method in the first preferred embodiment of the present invention. As can be seen from the figure, the solar cell maximum power tracking method of the present invention includes the following steps:

[0023] Step 1: Initialize the system and set the initial values ​​of the variables. Among them, the variables include the large output current disturbance ΔI_big, the output current small disturbance ΔI_small, the power stability range ε, the tracking direction Dir...

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 provides a maximum power tracking method for a solar cell. The maximum power tracking method for the solar cell comprises the following steps. A system is initialized, and an initial value of variable quantity is set. At the moment of K, an output voltage UK and an output current IK are detected, and an error value I_errorK of a current loop is calculated. Output power is PK, and an output power difference value is delta P. An output current set value Iref (K) enabling the delta P to meet the requirement of an error is obtained based on a current I_max1 which is closest to the maximum current value of the system, and the set value Iref (K) is the maximum current I_max that the system can output. The maximum power tracking method for the solar cell and a controller loop are combined closely so that charging of a rear end storage cell is effectively managed, and therefore the maximum power point of a system level can be rapidly tracked in time.

Description

technical field [0001] The invention relates to the technical field of solar cell control, in particular to a maximum power tracking method combining solar power tracking and controller efficiency. Background technique [0002] An independent solar power generation system is generally composed of solar cells, controllers (chargers), batteries, and power distribution systems. At present, the maximum power tracking of solar energy basically controls the controller directly through data processing by sampling the output voltage and current of solar cells. The pulse width or the voltage and current of the solar cell are used to realize the maximum power tracking of the solar energy, but there are also a few that sample the input voltage and current of the solar cell, and control the output current of the controller through processing to achieve the maximum power tracking. But these schemes have the following defects: 1. Solar cell output control realizes solar maximum power trac...

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): G05F1/67
CPCY02E10/56
Inventor 尚海波
Owner BYD CO LTD
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap