Method for tracking solar double-peak maximum power point

A maximum power point, solar energy technology, applied in instruments, adjusting electrical variables, control/regulating systems, etc., to shorten the scanning time, increase power generation, and ensure stable operation.

Inactive Publication Date: 2010-10-27
中电电气(南京)太阳能研究院有限公司
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The purpose of the present invention is to provide a method for tracking the maximum power point of solar energy double peaks, which can solve the problem of avoiding the system working at the sub-maximum power point for a long time when the solar module is covered by the shadow part to form a double peak phenomenon , reduce the maximum power point tracking global scan time, and increase the system power generation

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
  • Method for tracking solar double-peak maximum power point
  • Method for tracking solar double-peak maximum power point
  • Method for tracking solar double-peak maximum power point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] Such as image 3 Shown, the tracking method of a kind of solar energy bimodal maximum power point of the present invention, this method comprises the steps:

[0018] 1) Carry out global scanning at regular intervals; if the global scanning time reaches the set time, execute step 2) to step 4) sequentially; if the global scanning time does not reach the set time, then always perform the local MPPT algorithm;

[0019] The local MPPT algorithm refers to firstly measuring the current voltage and current when the global scan time has not reached the set time, and then calculating the current DC power = current voltage * current current, and comparing the current DC power with the previous DC power To determine the change direction and size of the duty cycle D; if the current DC power is greater than the last DC power and it does not hold, then increase the duty cy...

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 for tracking a solar double-peak maximum power point. The method comprises the following steps of: 1) performing global scanning periodically, if a global scanning time reaches a predetermined time, executing the step 2) to the step 4) in turn, and if the global scanning time does not reach the predetermined time, performing a local MPPT algorithm all the time; 2) defining initial scanning power and setting an initial step length; 3) measuring a current voltage and a current, and calculating current power, wherein the current power is equal to a product of the current and the current voltage; and 4) comparing the current power with last power, and judging power change by disturbing a duty ratio continuously to determine whether the scanning is finished so as to determine a maximum power point. The method has the advantages that: periodic global scanning is added into a common maximum power point tracing algorithm; a scanning time is shortened effectively according to series-parallel characteristics of a solar system so as to ensure the steady operation of the system and avoid that the system works at a secondary maximum power point in a double-peak phenomenon; and therefore, electric energy production is improved.

Description

technical field [0001] The invention relates to a method for tracking the maximum power point in a solar power generation system, in particular to a method for tracking the maximum power point of a solar energy double peak. Background technique [0002] There is no solution to this kind of problem in current products. Only MPPT (maximum power point tracking) tracking without double peak problem is considered, and the interference method and incremental conductance method are generally used to judge and track the maximum power point. With the development of building-integrated photovoltaic power plants, the double-peak problem of solar panels caused by shadows has gradually become prominent, such as figure 1 As shown, the multiple curves in this figure are power curves that gradually change with the increase of the shading amount. It can be seen that two maximum power points gradually appear; when the shadow part covers the solar panel, it may make the system work at Sub-max...

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): H02N6/00G05F1/67
Inventor 王小峰
Owner 中电电气(南京)太阳能研究院有限公司
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