Comprehensive configuration method for photovoltaic modules in photovoltaic power station

Abstract

The invention provides a comprehensive configuration method for a photovoltaic module in a photovoltaic power station, and the method comprises the steps: obtaining the working temperature Ta of the photovoltaic module in the photovoltaic power station under the extremely low temperature T0 of the region based on different irradiation intensities of the region; determining the maximum open-circuit voltage Vi of the photovoltaic module by adopting a diode model according to the working temperature Ta of the photovoltaic module, the open-circuit voltage Voc of the photovoltaic module under the standard test condition, the temperature coefficient Kt and the different irradiation intensities Gi; and calculating the number Ns of the photovoltaic modules connected in series according to the maximum system voltage Vdc and the maximum open-circuit voltage Vi of the photovoltaic power station. By correcting the open-circuit voltage Voc of the photovoltaic module twice, the series connection number optimally matched with the system voltage of the photovoltaic power station is obtained, the use number of related corollary equipment at the direct-current side end of the photovoltaic power station can be reduced, and the construction cost of the photovoltaic power station is further reduced.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power station design, in particular to a comprehensive configuration method of photovoltaic components in a photovoltaic power station. Background technique [0002] The core power generation equipment of a photovoltaic power station is a photovoltaic module and an inverter. The number of battery modules in series and parallel is set according to the model specifications of the inverter. Usually, the parameter given on the PV module nameplate is the open circuit voltage under standard test conditions (STC), while the actual operating state is a dynamic process that is constantly changing. [0003] Although it is proposed to correct the temperature of the module voltage in the industry, the deduction is based on the extremely low temperature of the environment, and the factor that the module voltage is affected by the light intensity is not considered at the same time. [0004] If the configu...

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Problems solved by technology

[0003] Although there is a proposal in the industry to correct the temperature of the module voltage, the extremely low temperature of the environment is used for derivation, and the factor that the module voltage is affected by the light intensity is not considered at the same time.

[0004] If the configuration method is not properly corrected, the number of serial and parallel configurations of modules and the specification parameters of the inverter will not be the optimal configuration, resulting in an increase in the construction cost of the photovoltaic power station

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