Unlock instant, AI-driven research and patent intelligence for your innovation.

Photovoltaic power generation system, its maximum power point tracking method and tracking device

A photovoltaic power generation system and maximum power point technology, applied in the field of solar photovoltaic power generation, can solve the problems of high manufacturing cost, complex circuit structure, MPPT control failure, etc., and achieve the effects of low cost, reliable operation and fast response speed

Active Publication Date: 2015-08-12
CHERY AUTOMOBILE CO LTD
View PDF5 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 solve the existing problems of complex circuit structure, high manufacturing cost and frequent failure of MPPT control under complex lighting conditions in the existing method of adjusting the maximum power point of a photovoltaic power generation system by changing power. Variations to adjust the maximum power point method of photovoltaic power generation system

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
  • Photovoltaic power generation system, its maximum power point tracking method and tracking device
  • Photovoltaic power generation system, its maximum power point tracking method and tracking device
  • Photovoltaic power generation system, its maximum power point tracking method and tracking device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a maximum power point tracking method for a solar photovoltaic power generation system, which is preferably used for controlling a sunroof solar photovoltaic power generation system of an automobile. The car sunroof solar photovoltaic power generation system is used to provide power for the car blower to realize the cooling and ventilation of the car. In order to maximize the use of solar energy, combined with the complexity of the changing lighting environment of the solar photovoltaic power generation system on the car skylight, a method for tracking the maximum power point of the photovoltaic power generation system is provided, which can be used to control the maximum power point tracking device. The device can be used to control the sunroof solar photovoltaic power generation system of the car.

[0044] Such as image 3 As shown, the flow chart of the maximum power point tracking method of the solar photovoltaic power generation system in ...

Embodiment 2

[0064] This embodiment provides a maximum power point tracking device for a photovoltaic power generation system, which can be used to control a sunroof solar photovoltaic power generation system of an automobile.

[0065] The maximum power point tracking device of the solar photovoltaic power generation system includes:

[0066] ergodic tracking cell for the first step of size D ref The unit traverses the duty ratio D=[0,1] of the pulse width modulation controller of the photovoltaic power generation system, detects the output power P of the photovoltaic power generation system corresponding to different duty ratios, and obtains the output power P within the duty ratio range Maximum value P max The corresponding duty cycle D max1 ; Preferably, the first step length D ref The value range is 0.05-0.1, more preferably, the first step length D ref The value is 0.05.

[0067] Perturb and observe tracking unit for the duty cycle D max1 as the starting point, with the second s...

Embodiment 3

[0073] Such as Figure 5 As shown, this embodiment provides a solar photovoltaic power generation system for a sunroof, which includes the above-mentioned maximum power point tracking device for a solar photovoltaic power generation system.

[0074] The solar photovoltaic power generation system for the sunroof of an automobile controlled by the above-mentioned maximum power point tracking method and the tracking device has fast tracking speed. When the main loop period of the control system is 10ms, the length of the first step adopted by the traversal method is D ref is 0.05, and the maximum time to search for the class maximum power point is 200ms. Of course, the main loop can also adopt other time periods according to the specific application situation; the second step length D adopted in the disturbance observation method step is 0.01, the maximum time to search for the maximum power point is 100ms; based on the above situation, the maximum time for the control system t...

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 maximal power point tracking method and a tracking device of a photovoltaic power generating system and a photovoltaic power generating system controlled by the tracking device, which belongs to the technical field of the solar photovoltaic power generation, and aims at solving the problems of the traditional method by utilizing the power variation to adjust a maximal power point of the photovoltaic power generating system that the circuit structure is complicated, the manufacturing cost is high and the tracking control of the maximal power point is frequently in failure under the complex light condition. The maximal power point tracking method is characterized in that a traversal method is used for global optimization to find a like maximal power point and a like optimal duty ratio; and then a perturbation and observation method is adopted to dynamically track voltage values within a small range near the like optimal duty ratio through a small step length so as to track the maximal power point. The photovoltaic power generating system is rapid to respond to the solar tracking, simple in structure and free from needing a large-current high-voltage sensor, low in cost, more reliable, safer and more efficient to operate.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic power generation, and in particular relates to a maximum power point tracking method and a tracking device of a photovoltaic power generation system, and a photovoltaic power generation system controlled by the tracking device. Background technique [0002] With the development of solar photovoltaic power generation, the use of independent operation and grid-connected solar photovoltaic power generation systems has played an important role in solving the problem of electricity consumption in remote areas without electricity and relieving the shortage of energy supply in cities. Whether it is an independent operation system or a grid-connected photovoltaic power generation system, how to use the limited space and area to improve the efficiency of the system and obtain the maximum energy is particularly important. The expensive price and low efficiency of solar photovoltaic cells are the ...

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): H02S10/00G05F1/67
CPCY02E10/58Y02E10/56
Inventor 李芳珍王建辉
Owner CHERY AUTOMOBILE CO LTD