System for inhibiting PID (Proportion-Integration-Differentiation) effect of photovoltaic cell panel

A photovoltaic panel and photovoltaic power generation system technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of inability to prevent PID and increase the risk of electric shock at night, so as to facilitate PID suppression and maintenance, and avoid nighttime The effect of electric shock

Active Publication Date: 2016-11-23
TBEA XIAN ELECTRIC TECH +2
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the first solution needs to solve the leakage current problem because the negative electrode of the battery board is grounded, and the second solution will increase the risk of electric shock at night
The third solution cannot prevent PID function when the inverter is not running

Method used

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  • System for inhibiting PID (Proportion-Integration-Differentiation) effect of photovoltaic cell panel
  • System for inhibiting PID (Proportion-Integration-Differentiation) effect of photovoltaic cell panel

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as Figure 4 with Figure 5 As shown, the present invention suppresses the system of photovoltaic panel PID effect, and described system is the inverter DC input side in the photovoltaic power generation system (such as Figure 4 shown) or a PID suppression device connected to the positive, negative and ground terminals of the output of the photovoltaic module (such as Figure 5 As shown), the PID suppression device can make the voltage of the negative electrode of the system not negative to the ground, thereby suppressing the potential-induced attenuation of the components.

[0032] Such as Image 6 with Figure 7 As shown, the PID suppression device is composed of an isolated DC / DC circuit system. The input terminal of the PID suppression device is the positive input Vin+ and the negative input Vin-, and the output t...

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Abstract

The invention relates to a system for inhibiting a PID (Proportion-Integration-Differentiation) effect of a photovoltaic cell panel. According to the system, a PID inhibiting device is connected with a direct-current (DC) input side of an inverter of a photovoltaic power generating system or three terminals, i.e., an output positive terminal, an output negative terminal and a ground terminal of a photovoltaic assembly and can be used for achieving that the voltage-to-ground of the negative pole of the system is not negative, so that the induced attenuation of electric potential of the assembly is inhibited; the PID inhibiting device is made up of an isolated-type DC/DC circuit system. The function of the PID inhibiting device can be used for achieving that the voltage-to-ground of the negative pole of the system is not negative, so that the induced attenuation of the electric potential of the photovoltaic cell assembly is inhibited.

Description

technical field [0001] The invention relates to the technical field of suppressing the PID effect of a photovoltaic battery panel, in particular to a system for suppressing the PID effect of a photovoltaic battery panel. Background technique [0002] The potential-induced decay (PID) effect of photovoltaic modules, the PID effect refers to the leakage current between the glass, packaging materials, aluminum frame and the battery sheet in the photovoltaic module, so that a large amount of charge accumulates on the surface of the battery sheet, resulting in battery fill factor, open circuit The reduction of voltage and short-circuit current is a phenomenon of power attenuation caused by batteries and even components. The power generation performance and durability of photovoltaic components with PID effect are seriously affected. There are three traditional methods to suppress the PID effect of the solar panel: the first one is as figure 1 As shown, connect the negative pole ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/30H02S40/32
CPCH02S40/30H02S40/32Y02E10/50
Inventor 赵明曹先贵周洪伟梁欢迎
Owner TBEA XIAN ELECTRIC TECH
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