A photovoltaic battery power supply device and method

A photovoltaic cell and power supply device technology, applied in the field of photovoltaic cell power supply devices and variable voltage sources, can solve the problems of photovoltaic cell power generation energy loss and unsustainable power generation, achieve continuous power generation, ensure maximum power output, and improve energy recovery. Yield effect

Active Publication Date: 2021-09-03
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a variable voltage source, photovoltaic cell power supply device and method, which can overcome the problems of photovoltaic cell power generation energy loss and unsustainable power generation caused by PWM control of photovoltaic cell output on and off, and at the same time ensure photovoltaic The battery always runs at the maximum power point to achieve the maximum power output of the photovoltaic cell, and supplies power to the load according to the voltage value corresponding to the maximum power point to improve the energy recovery rate of the photovoltaic cell

Method used

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  • A photovoltaic battery power supply device and method
  • A photovoltaic battery power supply device and method
  • A photovoltaic battery power supply device and method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0042] Such as figure 1 As shown, a variable voltage source 4 includes a contact selection device 41, a metal contact group 42 and a battery row 43;

[0043] Among them, the metal contact group 42 is connected to the battery discharge 43; the metal contact group 42 includes a plurality of metal contacts; the battery row is composed of a plurality of batteries connected in series; the voltage from the first metal contact to the last metal contact increases sequentially;

[0044] In this embodiment, metal contacts and batteries can be connected in one-to-one correspondence, that is, each battery corresponds to a metal contact;

[0045]As an optional implementation, the voltage difference between two adjacent metal contacts is at least twice the voltage of a single battery, and the voltage from the first metal contact to the last metal contact increases in equal increments, that is, the voltage difference between two adjacent metal contacts The number of batteries connected in s...

Embodiment 2

[0056] Such as figure 2 As shown, the photovoltaic cell power supply device shown in this embodiment includes a photovoltaic cell array, an automatic voltage regulation device, a DC / DC converter, a maximum power tracking controller, a PWM controller and a load;

[0057] Among them, the photovoltaic cell array, the automatic voltage control device, the DC / DC converter and the load are connected in sequence, one end of the maximum power tracking controller is connected to the photovoltaic cell array, one end of the maximum power tracking controller is connected to the PWM controller, and the voltage is automatically regulated The device is controlled by the maximum power tracking controller, and the DC / DC converter is controlled by the PWM controller;

[0058] The maximum power tracking controller is used to find the maximum power point of the photovoltaic cell array. When the maximum power point is found, it sends a control signal to the automatic voltage regulation device to ...

Embodiment 3

[0065] Such as Figure 5 Shown, a kind of photovoltaic battery power supply method, comprises the following steps:

[0066] S1: Obtain the maximum power point of the photovoltaic cell array;

[0067] S2: Determine the corresponding voltage value according to the maximum power point of the photovoltaic cell array, and adjust the terminal voltage of the variable voltage source in the voltage automatic regulation device to the corresponding voltage value;

[0068] This step specifically includes:

[0069] Control the rotation angle of the stepper motor in the variable voltage source in the voltage automatic regulation device, so that the slider on the lead screw slides, the contacts on the slider contact the corresponding metal contacts, and the variable voltage source The terminal voltage is adjusted to the corresponding voltage value;

[0070] S3: Use the DC / DC converter to receive the output voltage of the automatic voltage regulation device, and control the boost ratio by ...

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PUM

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Abstract

The invention relates to a variable voltage source, a photovoltaic cell power supply device and a method thereof. The variable voltage source includes a contact selection device, a metal contact group and a battery row; the metal contact group is electrically connected to the battery row, and the metal contact group includes A plurality of metal contacts, the battery row is composed of a plurality of batteries in series; the voltage from the first metal contact to the last metal contact increases sequentially; the contact selection device includes a contact, one end of the contact is selectively connected to the metal contact The metal contacts with different contact connections output different voltages. Under the control of the maximum power tracking controller, the variable voltage source adjusts the terminal voltage of the variable voltage source to the voltage corresponding to the maximum power point of the photovoltaic cell array, and supplies power to the load according to the voltage value corresponding to the maximum power point of the photovoltaic cell, ensuring The maximum power output of the photovoltaic cell array improves the energy recovery rate of the photovoltaic cell; the variable voltage source can also store the electric energy generated by the photovoltaic cell array to realize continuous power generation of the photovoltaic cell.

Description

technical field [0001] The invention relates to the field of photovoltaic battery power supply, in particular to a variable voltage source, photovoltaic battery power supply device and method. Background technique [0002] At present, the application scope of photovoltaic power generation is getting wider and wider, but the technical bottleneck limitation of low power generation efficiency restricts its popularization. [0003] Photovoltaic battery is an intermittent and fluctuating power generation without self-storage capability. The power generation is greatly affected by the environment, and there are different maximum power points at different times. It is necessary to output a specific voltage and current in order to give full play to the power generation capacity of photovoltaic cells and achieve maximum power output. If the output voltage does not match, the maximum power output cannot be achieved, and the power generation capacity of the photovoltaic cell cannot be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S10/00G05F1/67
CPCG05F1/67H02S10/00Y02E10/56
Inventor 贺新升蒋佳杰高春甫周崇秋郑岚鹏
Owner ZHEJIANG NORMAL UNIVERSITY
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