Photovoltaic system and maximum power tracking method thereof

Abstract

The embodiment of the invention relates to the technical field of photovoltaic cell manufacturing, and discloses a photovoltaic system and a maximum power tracking method thereof. The photovoltaic system comprises a plurality of photovoltaic cells which are used for collecting the solar energy to generate a direct current; a plurality of optimizers which are used for sending electrical parameters to a cloud server, wherein the electrical parameters at least comprise the first output parameters of the photovoltaic cells and the second output parameters of the optimizers; the cloud server which is used for receiving the electrical parameters and calculating the characteristic physical quantities used for adjusting the output power of the photovoltaic cells according to the electrical parameters, and is further used for sending the characteristic physical quantities to the optimizers. The optimizers are also used for receiving the characteristic physical quantity and adjusting the output power of the photovoltaic cells according to the characteristic physical quantity so as to realize the maximum power tracking of the photovoltaic cells. According to the photovoltaic system and the maximum power tracking method thereof provided by the invention, the efficient photovoltaic cell maximum power tracking can be realized, and the accuracy and efficiency for calculating the maximum power of the photovoltaic cells are improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of photovoltaic cell manufacturing, and in particular to a photovoltaic system and a method for maximum power tracking of the photovoltaic system. Background technique [0002] Solar energy is a clean and efficient renewable energy. The Maximum Power Point Tracking (MPPT) system is a system that adjusts the working conditions of the solar cells so that the photovoltaic cells can always convert the solar energy into electrical energy output to the greatest extent when the environmental conditions such as light intensity and temperature change. Technology. The MPPT module enables photovoltaic cells to maximize the conversion of solar energy into electrical energy under different environmental conditions, and whether these electrical energy can be transmitted to the grid or load with the highest efficiency depends on the electrical performance of each photovoltaic cell output voltage, cur...

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Problems solved by technology

[0003] The inventor found that there are at least the following problems in the prior art: at present, the MPPT of photovoltaic cells is tracked by the calculation chip inside the optimizer through algorithms, and the main algorithms include disturbance observation method, conductance incremental method, constant voltage tracking method, etc., but All of the above methods will cause internal heating of the optimizer, which will interfere with the computing chip, and then affect the computing accuracy and efficiency of the computing chip.

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