Design of photovoltaic cell system based on central controlling system

A central control system, photovoltaic power generation technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules and other directions, can solve problems such as battery cell failure, affecting charging efficiency, and current flowing into faulty branches

Pending Publication Date: 2017-11-07
孙睿超
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  • Claims
  • Application Information

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Problems solved by technology

However, in the process of actual use, it often occurs that a battery or a branch in the system fails to generate electricity, resulting in the voltage balance of each branch and current reverse phenomenon, which seriously affects the charging efficiency.
For example, in the case where the photovoltaic power generation array is in parallel structure and each branch is composed of cells connected in series, it often happens that one or several cells in one of the branches fail, resulting in a drop in the voltage of the branch. Small, causing the current of other normal branches to flow backward into the faulty branch, seriously affecting the output efficiency of the photovoltaic power generation array

Method used

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  • Design of photovoltaic cell system based on central controlling system

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Embodiment Construction

[0013] The following will refer to the attached figure 1 To describe the present invention in more detail, in the following description, descriptions of structures and techniques known to those skilled in the art are omitted. Such as figure 1 As shown in , the photovoltaic power generation array is composed of 8 branches connected in parallel, and each branch is composed of photovoltaic cells 1 connected in series. A switch S1...S8 is connected in series at the anode of each branch, and a sampling device 2 is provided at the cathode to connect to the information collection module. In this example, the sampling device 2 is a Hall sensor set on a wire, but other types of current sensors can also be used to transmit the current data to the information sampling module, or a resistor can be directly connected in series, and then the voltage at both ends of the resistor can be collected. Sampling is done.

[0014] The information collection module and the switch control module ar...

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Abstract

The present invention provides a photovoltaic battery system based on a central control system, which can automatically detect faulty branches in parallel photovoltaic arrays that cannot maintain normal voltage output by setting a response acquisition and control circuit in the photovoltaic battery array. And disconnect to reduce the impact on the output power caused by the unbalanced voltage of each branch in the photovoltaic power generation array.

Description

technical field [0001] The present invention relates to the design of an intelligent photovoltaic power generation module, in particular to the design of a photovoltaic cell array that can conveniently detect the working state of the cells and automatically disconnect the cells that fail to work normally. Background technique [0002] At present, independent photovoltaic power generation systems have been applied to a certain extent in vast rural areas and have broad development prospects. However, in the process of actual use, it often occurs that a certain cell or a certain branch circuit in the system fails to generate electricity, resulting in the voltage balance of each branch circuit and the phenomenon of current inversion, which seriously affects the charging efficiency. For example, in the case where the photovoltaic power generation array is in parallel structure and each branch is composed of cells connected in series, it often happens that one or several cells in ...

Claims

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Application Information

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IPC IPC(8): H02S40/30H02S40/36H02S50/10H01L31/05
CPCY02E10/50H02S40/30H01L31/0504H02S40/36H02S50/10
Inventor许亮梁兰菊
Owner孙睿超