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Method and device for tracing maximum power point and power supply system

A technology of maximum power point and power supply system, applied in photovoltaic power generation, electrical components, light radiation generators, etc., can solve problems such as long adjustment time, low response speed, and difficulty in maximum power output, so as to reduce the number of measurements and adjustments The effect of increasing the number of times and improving the overall response speed

Active Publication Date: 2012-08-08
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a maximum power point tracking method, device, and power supply system to solve the problems of low response speed of the power supply system, long adjustment time, and difficulty in quickly achieving maximum power output during maximum power point tracking.

Method used

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  • Method and device for tracing maximum power point and power supply system
  • Method and device for tracing maximum power point and power supply system
  • Method and device for tracing maximum power point and power supply system

Examples

Experimental program
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no. 1 example

[0034] see figure 1 , is the flow chart of the first embodiment of the maximum power point tracking method of the present invention:

[0035] Step 101: Measure at least two energy input components in the same power supply system under different input conditions, and obtain at least two power value results.

[0036] In the embodiment of the present invention, the power supply system may be a solar photovoltaic power generation system, using solar photovoltaic panels as energy input components, or a wind power generation system, using wind turbine blades as energy input components. Different from power point scanning in serial mode in the prior art, the embodiment of the present invention measures at least two energy input components under different input conditions at the same time, so that by comparing each measurement result, the next step can be determined by parallel scanning. Input conditions of at least two energy input components at a time.

[0037] In this embodiment,...

no. 1 example

[0061] see image 3 , is a block diagram of the first embodiment of the maximum power point tracking device of the present invention:

[0062] The device includes: a measuring unit 310 , a determining unit 320 and a tracking unit 330 .

[0063] Wherein, the measurement unit 310 is used to measure at least two energy input components in the same power supply system under different input conditions, and obtain at least two power value results;

[0064] A determining unit 320, configured to determine the input conditions of the at least two energy input components at the next moment by comparing the at least two power value results;

[0065] The tracking unit 330 is configured to repeatedly execute the functions of the measurement unit 310 and the determination unit 320 until the maximum power points of the at least two energy input components are tracked.

no. 2 example

[0066] see Figure 4A , is a block diagram of the second embodiment of the maximum power point tracking device of the present invention:

[0067] The device includes: a measurement unit 410 , a determination unit 420 , a tracking unit 430 and an adjustment unit 440 .

[0068] Wherein, the scanning unit 410 is used to measure at least two energy input components in the same power supply system under different input conditions, and obtain at least two power value results;

[0069] A determining unit 420, configured to determine the input conditions of the at least two energy input components at the next moment by comparing the at least two power value results;

[0070] A tracking unit 430, configured to repeatedly execute the functions of the measurement unit 410 and the determination unit 420 until the maximum power point of the at least two energy input components is tracked;

[0071] The adjustment unit 440 is configured to adjust the power of other energy input components ...

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Abstract

An embodiment of the invention discloses a method and a device for tracing a maximum power point and a power supply system. The method comprises the steps of: measuring at least two energy input modules of the same power supply system under different input conditions to obtain at least results of two power values; determining input conditions of the at least two energy input modules for the next moment through the comparison of the results of the two power values; and repeating the above steps until the maximum power point of the at least two energy input modules is traced; In the embodiment of the invention, the maximum power point can be traced in parallel among different energy modules, thereby adjusting times of the input conditions can be reduced; and measuring times of every energy input module under different input conditions can be reduced, thereby an overall response speed of the power supply system can be improved when the maximum power point is being traced; adjusting time can be reduced; a maximum power output of the power supply system can be realized rapidly; and the system generating capacity can be raised.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a maximum power point tracking method, device and power supply system. Background technique [0002] In the process of developing new energy sources, solar photovoltaic power generation and wind power generation are widely used. Taking the solar photovoltaic power generation system as an example, the system tracks the direction of the sun through solar panels, so that the sun's rays can always shine on the solar panels vertically, so as to maximize photovoltaic power generation. The output characteristics of the solar panel are greatly affected by external environmental factors such as light intensity and temperature, so its output power has time-varying nonlinear characteristics. It is necessary to change the output voltage or current or tilt angle of the solar panel to make it work at the optimum power on the curve. [0003] The solar power generation syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N6/00H02S40/30
CPCY02E10/50
Inventor 石勇陶渊郭新
Owner HUAWEI DIGITAL POWER TECH CO LTD
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