Maximum power point tracking method for rapidly self-adapting step length of photovoltaic array

A technology of maximum power point and photovoltaic array, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of limiting tracking speed, etc., and achieve the effect of improving tracking speed and tracking accuracy, and adaptive step size v sensitivity

Inactive Publication Date: 2013-04-03
NINGBO UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adaptive step size v is greatly affected by the slope of the PV characteristic curve P-V curve. When the slope of the P-V curve is larger, t

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 method for rapidly self-adapting step length of photovoltaic array
  • Maximum power point tracking method for rapidly self-adapting step length of photovoltaic array
  • Maximum power point tracking method for rapidly self-adapting step length of photovoltaic array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] Such as figure 2 As shown, a maximum power point tracking method for fast self-adaptation of photovoltaic array step size, including the following steps:

[0038] ①The constant voltage method is adopted in the system start-up stage, so that the initial voltage V(0) is rapidly reduced to 80% of the open circuit voltage Vr, that is, V(0)=Vr*80%, and at the same time according to the initial voltage V(0)=Vr*80% , to sample the initial current I(0). For example, using a typical solar panel Solarex MSX60, the open circuit voltage Vr=21.000V; then, the initial voltage V(0)=Vr*80%=16.800V, and the initial current I(0)=3.5952A.

[0039] ②After the system start-up phase is over, the output voltage and output current of the photovoltaic array are sampled, V(k) represents the output voltage of the kth (k=1,2...,K) sampling, and I(k) represents the kth (k=1,2,...

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 point tracking method for rapidly self-adapting step length of a photovoltaic array to solve a technical problem. The method is simple in design thinking and easy to realize; and the step length can be also automatically adjusted to track a maximum power point of the photovoltaic array. According to the invention, the self-adaptive step length v (v=/dP/dV/) is beyond a neighborhood U (Pmax, epsilon) of the maximum power point by using a logarithm operation form, so that larger stable step length is kept; and within the neighborhood U (Pmax, epsilon) of the maximum power point, the self-adaptive step length v is further rapidly reduced and the step length v of 0 at the maximum power point is guaranteed, so that the self-adaptive step length v is more sensitive and the tracking speed of the system is increased and tracking accuracy of a system is improved.

Description

technical field [0001] The invention relates to a photovoltaic array maximum power point tracking method, in particular to a maximum power point tracking method for rapid self-adaptation of photovoltaic array step size. Background technique [0002] Maximum Power Point Tracking (MPPT) technology is almost the most important part of photovoltaic systems. On the basis of classic methods such as constant voltage method, perturbation and observation method (Perturb and Observe, P&O for short), and incremental admittance method (Incremental Conductance, IncCond for short), a large number of improved MPPT methods have been proposed and applied. [0003] The principle of the constant voltage method is to ignore the influence of the ambient temperature on the system, and use the voltage data corresponding to the maximum power point output obtained from the manufacturer as the output voltage of the photovoltaic array. It is easy to operate and easy to implement, and because the cont...

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): G05F1/66
Inventor 夏银水寇彦宏
Owner NINGBO UNIV
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