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Photovoltaic module-based degradation phenomenon processing method and related equipment

A technology of photovoltaic modules and processing methods, which is applied in the monitoring of photovoltaic systems, photovoltaic modules, photovoltaic power generation, etc., can solve the problems of reduced power conversion capacity of photovoltaic modules, reduced power generation efficiency, etc.

Active Publication Date: 2018-10-12
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention discloses a degradation phenomenon processing method and related equipment, which can solve the problem that in the prior art, when the degradation phenomenon (specifically, the surface polarization phenomenon and / or PID phenomenon) occurs in the photovoltaic module, the power conversion capability of the photovoltaic module will be reduced. , power generation efficiency reduction and other issues

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  • Photovoltaic module-based degradation phenomenon processing method and related equipment
  • Photovoltaic module-based degradation phenomenon processing method and related equipment
  • Photovoltaic module-based degradation phenomenon processing method and related equipment

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Embodiment Construction

[0057] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the present invention.

[0058] During the process of submitting this application, the applicant found that the PID phenomenon will occur in the photovoltaic module under the negative bias voltage, and the surface polarization phenomenon will occur in the positive bias voltage. Such as figure 1 A schematic diagram of a photovoltaic module power generation system is shown. Such as figure 1 , usually the frame of the photovoltaic module is grounded, which will cause a bias voltage between a single photovoltaic module and the frame. And if figure 1 As shown, the closer to the output end of the negative electrode, the PID phenomenon is more obvious under the action of negative bias; the closer to the output end of the positive electrode, the surface polarization phenomenon is more obvious under the action of positive bias ...

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Abstract

Embodiments of the invention disclose a photovoltaic module-based degradation phenomenon processing method and related equipment. The method comprises the steps of applying a high-frequency signal toa photovoltaic module when the photovoltaic module suffers from a degradation phenomenon to protect the photovoltaic module and to suppress or remove the degradation phenomenon, wherein the degradation phenomenon is a power generation efficiency degradation phenomenon of the photovoltaic module under influence of potential. By adoption of the embodiments of the invention, the problems of lowered electric energy conversion capability, lowered power generation efficiency and the like of the photovoltaic module caused when the photovoltaic module suffers from a surface polarization phenomenon and / or a PID phenomenon in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronics, in particular to a photovoltaic module-based degradation phenomenon processing method and related equipment. Background technique [0002] PID (potential induced degradation) is potential induced degradation. Under the long-term negative bias of photovoltaic modules, metal ions (positive charges) migrate between glass and packaging materials, resulting in attenuation of the performance of photovoltaic modules. This phenomenon is also called PID phenomenon. For example, a large number of metal ions (sodium ions) in the glass migrate into the PN junction of the photovoltaic module, which will lead to the conduction of the PN junction. At this time, the photovoltaic module loses its ability to convert electric energy, which seriously affects the power generation efficiency of the photovoltaic module. [0003] Correspondingly, the long-term positive bias of the photovoltaic mod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/186Y02E10/50Y02P70/50H02S50/10H01L31/208G01R31/2642
Inventor 罗涛景遐明黄伯宁
Owner HUAWEI DIGITAL POWER TECH CO LTD
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