Maximum power point tracking system and method for photovoltaic power generation system

A technology of maximum power tracking and photovoltaic power generation system, which is applied in photovoltaic power generation, light radiation generators, photovoltaic modules, etc., can solve the problems of low output power utilization of photovoltaic power generation systems, eliminate output voltage and current values, and improve The effect of output efficiency

Active Publication Date: 2012-02-08
四川德源电气有限公司
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the embodiment of the present application provides a maximum power point tracking method and device for a photo

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 point tracking system and method for photovoltaic power generation system
  • Maximum power point tracking system and method for photovoltaic power generation system
  • Maximum power point tracking system and method for photovoltaic power generation system

Examples

Experimental program
Comparison scheme
Effect test

specific example

[0038] see Figure 3-5 , the present application also provides a specific example of a maximum power point tracking system, the system may include:

[0039] A solar panel that converts solar energy into direct current electricity.

[0040] MPPT controller 401, by adjusting the output pulse duty ratio of the MPPT controller, its equivalent input impedance can be changed, thereby adjusting the output power of the solar power generation system, and the MPPT controller can be equivalent to figure 2 The equivalent load R shown in.

[0041] Specifically, the MPPT controller can be implemented by a load converter or a charge controller, and the charge controller is used to convert the output voltage and current value of the solar panel into a value within the allowable range of the battery load, because the charge controller The working process and principles belong to the common knowledge of those skilled in the art, and will not be repeated here.

[0042] The load converter can b...

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 maximum power point tracking system and a method for a photovoltaic power generation system. The system comprises an internal resistance sensor, wherein the internal resistance sensor provides alternating current signals into a direct current main loop of the photovoltaic power generation system and can simultaneously obtain and compare the alternating current response signals with the same frequency as the alternating current on the equivalent output impedance of a solar panel and the equivalent input impedance of a maximum power point tracking (MPPT) controller, a comparison result is obtained, and the output pulse duty ratio of the MPPT controller is regulated until the comparison result is zero. Through the full circuit ohm law, when the impedance value of the equivalent load is the same as the internal resistance of a power supply, the power supply output power obtained by an equivalent load is maximum, and the maximum power point is reached. The method can be used for detecting the maximum power point of the system in real time, in addition, the change of the maximum power point is accurately and fast tracked, so the power consumption caused by oscillation regulation of the output voltage value and the current value of the solar panel and the searching of the changed maximum power point is eliminated, and the output efficiency of the photovoltaic power generation system is improved.

Description

technical field [0001] The present application relates to the technical field of photovoltaic power generation, in particular to a maximum power point tracking system and method for a photovoltaic power generation system. Background technique [0002] The solar panel is affected by light, temperature, etc., and the output power also changes all the time. The maximum power point tracking means that the MPPT (Maximum Power Point Tracking, maximum power tracking) controller can detect the output voltage value and current value of the solar panel in real time. , and adjust the output power of the photovoltaic power generation system, that is, change the load impedance and then change the voltage and current values ​​of the system, so that the actual output power of the system is as close as possible to the current theoretical maximum output power, so as to supply power to the load with the highest efficiency. [0003] The maximum power tracking system in the prior art at least i...

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): H02N6/00H02S40/30
CPCY02E10/50
Inventor 陈健
Owner 四川德源电气有限公司
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