Photovoltaic battery power supply system, and MPPT control method and device

A photovoltaic battery and power supply system technology, applied in the field of solar energy, can solve the problems of low power supply efficiency and output energy utilization rate of photovoltaic battery power supply system, unbalanced output of MPPT control module, large number of photovoltaic battery modules, etc.

Inactive Publication Date: 2018-04-06
EMERSON NETWORK POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a photovoltaic battery power supply system, which is used to solve the problems of the large number of photovoltaic battery modules required by the existing phot...

Method used

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  • Photovoltaic battery power supply system, and MPPT control method and device
  • Photovoltaic battery power supply system, and MPPT control method and device
  • Photovoltaic battery power supply system, and MPPT control method and device

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Embodiment 1

[0027] In order to solve the existing photovoltaic battery power supply system needs a large number of photovoltaic battery modules, the output imbalance of each MPPT control module, the power supply efficiency of the photovoltaic battery power supply system and the utilization rate of output energy are low, the present invention A photovoltaic battery power supply system is provided in Embodiment 1, such as figure 2 As shown, it is a schematic structural diagram of the photovoltaic battery power supply system described in Embodiment 1 of the present invention. Specifically, such as figure 2 As shown, the photovoltaic battery power supply system described in Embodiment 1 of the present invention may include: a photovoltaic battery module 21, a main control module 22 and at least one auxiliary control module 23 ( figure 2 Take 2 auxiliary control modules as an example), where:

[0028] The photovoltaic cell module 21 can be used to supply power to the main control module a...

Embodiment 2

[0096] In order to solve the problems existing in the prior art that there are many required photovoltaic cell modules, the output imbalance of each MPPT control module, the power supply efficiency of the photovoltaic cell power supply system and the utilization rate of output energy are all low, the second embodiment of the present invention provides an MPPT control method such as Figure 5 As shown, it is a schematic flowchart of the MPPT control method described in Embodiment 2 of the present invention. Specifically, by Figure 5 It can be seen that the MPPT control method may include the following steps:

[0097] Step 501: After the photovoltaic battery supplies power to the main control module and at least one auxiliary control module, determine the maximum power point of the photovoltaic battery power supply system;

[0098] Step 502: According to the maximum power point, send a control signal to the at least one auxiliary control module, so that the at least one auxil...

Embodiment 3

[0115] Based on the same inventive concept as that of Embodiment 2 of the present invention, Embodiment 3 of the present invention provides an MPPT control device, such as Image 6 As shown, it is a schematic structural diagram of the MPPT control device described in Embodiment 3 of the present invention. Specifically, by Image 6 It can be known that the MPPT control device may include:

[0116] The determination unit 61 can be used to determine the maximum power point of the photovoltaic battery power supply system after the photovoltaic battery supplies power to the main control module and at least one auxiliary control module;

[0117] The control unit 62 is configured to send a control signal to the at least one auxiliary control module according to the maximum power point, so that the at least one auxiliary control module adjusts its own output characteristics based on the control signal.

[0118] Specifically, the determining unit 62 may be specifically configured to:...

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Abstract

The invention discloses a photovoltaic battery power supply system, and an MPPT control method and device. The photovoltaic battery power supply system is composed of a photovoltaic battery module, amain control module and at least one auxiliary control module. Compared with the prior art, the photovoltaic battery power supply system is characterized by only comprising one photovoltaic battery module, so that the main control module and the at least one auxiliary control module are connected in parallel at an input stage; and thus the inputs of the main control module and the at least one auxiliary control module are identical, so that consistency of outputs of the main control module and the at least one auxiliary control module is ensured. Therefore, the number of photovoltaic battery modules is reduced; and the power supply efficiency of the photovoltaic battery power supply system and the utilization rate of the output energy are improved.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a photovoltaic battery power supply system, an MPPT control method and a device. Background technique [0002] With the development of solar energy technology, various electronic devices have higher and higher requirements for photovoltaic battery-powered systems, but at present most of the MPPT (Maximum Power Point Tracking, Maximum Power Point Tracking) control modules in photovoltaic battery-powered systems are For stand-alone machines, their output power and current are often limited, which can no longer meet actual needs. In order to increase the output power and current of the MPPT control module, multiple MPPT control modules are often connected in parallel at the output stage in the industry to further increase the output power and output current of the entire MPPT control module, for example, as figure 1 As shown, a plurality of photovoltaic cell modules are connec...

Claims

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Application Information

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IPC IPC(8): H02J1/12
CPCH02J1/12H02J3/385Y02E10/56
Inventor 陈淑梅首福俊
Owner EMERSON NETWORK POWER CO LTD
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