Method for predicting dust accumulation degree of photovoltaic module
A photovoltaic module and fouling technology, which is applied in the application field of solar photovoltaic systems, can solve the problems of fouling and melting, affecting the light transmittance and bonding of photovoltaic module surface glass, etc.
Inactive Publication Date: 2019-07-26
HOHAI UNIV CHANGZHOU
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[0002] The dust on the surface of the photovoltaic module will affect the light transmittance of the surface glass of the photovoltaic module, reduce the intensity of solar radiation received by the module, and thus reduce the power generation efficiency of the module. In addition, if If the dust accumulation is not cleaned in time, the surface temperature of the module will rise, which will cause the dust accumulation to melt and bond, resulting in a "hot spot effect", and the acidic substances in the dust accumulation will corrode the components. Component power generation brings large economic losses
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[0055] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0056] The present invention provides a method for predicting the degree of dust accumulation of photovoltaic modules, see figure 1 and figure 2 , consisting of the following sections:
[0057] 1. Establish a model of the real-time dust accumulation degree of photovoltaic modules. The specific process is as follows:
[0058] 1-1) Calculate the real-time dust accumulation degree of photovoltaic modules:
[0059]
[0060] Among them, ζ is the initial correction factor, η i is the real-time ash accumulation degree of the photovoltaic module under the i-th data point,
[0061] I 1i , I 2i Respectively expressed as the output current of the i-th data point of the cleaning component and the dust-depositing component, i is the order of ...
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The invention discloses a method for predicting the dust accumulation degree of a photovoltaic module, and the method specifically comprises the steps: calculating the real-time dust accumulation degree of the photovoltaic module according to the working current of a photovoltaic comparison module, namely a cleaning module and a dust accumulation module; solving an average dust accumulation degreein a short period, and establishing substrate data; secondly, establishing a model for predicting the dust accumulation degree of the photovoltaic module, and calculating the dust accumulation degreeof a certain time point in the future according to the weather condition in the future. According to the method, the ash deposition degree of the photovoltaic module is predicted, and a foundation islaid for judging and predicting the ash deposition cleaning time point of the module.
Description
technical field [0001] The invention relates to a method for predicting the dust accumulation degree of photovoltaic modules, which belongs to the technical field of solar photovoltaic system applications. Background technique [0002] Dust on the surface of photovoltaic modules will affect the light transmittance of the surface glass of photovoltaic modules, reduce the intensity of solar radiation received by the modules, and thus reduce the power generation efficiency of the modules. The ash is melted and bonded, resulting in a "hot spot effect", and the acidic substances in the ash accumulation will corrode the components. Therefore, it can be seen from the above that the ash accumulation phenomenon brings greater economic losses to photovoltaic module power generation. [0003] At present, the problem of photovoltaic dust accumulation has become a focus of the photovoltaic industry, and the timing of dust accumulation cleaning has also become a problem that people urgent...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李沁书张臻祝曾伟张起源徐超萍
Owner HOHAI UNIV CHANGZHOU