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Photovoltaic module and photovoltaic power station system

A technology for photovoltaic modules and photovoltaic power plants, applied in the field of solar cells, can solve problems such as hot spot effect, photovoltaic module damage, and shorten the service life of photovoltaic modules, and achieve the effects of improving performance, increasing output power, and improving service life.

Active Publication Date: 2017-03-08
JINKO SOLAR CO LTD
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  • Claims
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Problems solved by technology

However, the existing photovoltaic modules will have a hot spot effect when they are shaded, causing damage to the photovoltaic modules and reducing the service life of the photovoltaic modules

Method used

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  • Photovoltaic module and photovoltaic power station system
  • Photovoltaic module and photovoltaic power station system
  • Photovoltaic module and photovoltaic power station system

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Embodiment Construction

[0025] As mentioned in the background art, existing photovoltaic components often have hot spot effects, which cause damage to the photovoltaic components and reduce the service life of the photovoltaic components. The inventor found that the cause of this defect is mainly due to the fact that the existing photovoltaic modules encounter shading, the shaded photovoltaic modules consume the energy generated by other photovoltaic modules in the same photovoltaic power plant system, and the shaded photovoltaic modules generate heat, appearing hot spot effect.

[0026] Specifically, a photovoltaic power station system includes a plurality of photovoltaic modules, and the photovoltaic modules are generally connected in series. When one of the photovoltaic modules is shaded, the current generated by the photovoltaic module decreases and does not match the current generated by other photovoltaic modules in series. At this time, the shaded photovoltaic module will be consumed as a load...

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Abstract

The invention discloses a photovoltaic assembly and a photovoltaic power station system. The photovoltaic assembly comprises a controller. The controller comprises a control output unit for controlling the output currents of the photovoltaic assembly to be the same as the currents of the photovoltaic power station system. According to the invention, in case that the photovoltaic assembly is shielded, the shielded photovoltaic assembly is prevented from working as a load to consume energy generated by other photovoltaic assemblies which are not shielded and is accordingly prevented from generating a hot spot effect. At the same time, in the evening, the controller connects a battery string with a frame, since the frame is grounded, the battery string and the frame form a grounding loop, thus a potential balance between the battery string of the photovoltaic assembly and the frame is realized, ions accumulated by the battery string are released, the photovoltaic assembly is prevented from generating a PID effect, and the performance of the photovoltaic assembly is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, and more specifically, to a photovoltaic module and a photovoltaic power station system. Background technique [0002] With the growing shortage of fossil fuels, solar energy, as a green energy source, will not cause environmental pollution, and is a renewable resource. It has become a new type of energy with broad development prospects, providing energy security for the future development of mankind. Today's photovoltaic market is dominated by crystalline silicon photovoltaic modules, which have the advantages of abundant raw materials, high conversion efficiency, high reliability, simple structure, and long life. [0003] Such as figure 1 As shown, in the conventional photovoltaic power plant system, multiple photovoltaic modules 1 are connected in series, and the output of multiple photovoltaic modules 1 is controlled through the central control cabinet 2, so as to reduce the adaptation l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S40/34
CPCH02S40/00Y02E10/50
Inventor 赖斌刘亚锋董曙光金浩陈康平
Owner JINKO SOLAR CO LTD
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