Miniature photovoltaic array maximum power tracking device and method

A maximum power tracking and photovoltaic array technology, which is applied in photovoltaic power generation, instruments, adjusting electrical variables, etc. It can solve the problems of inability to track the maximum power, and the output power tracking is greatly affected by the environment, achieving good stability and high tracking accuracy. Effect

Inactive Publication Date: 2011-07-20
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0004] Aiming at the shortcomings of the traditional power tracking device mentioned in the above background technology that the output power tracking of the miniature photovoltaic a

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  • Miniature photovoltaic array maximum power tracking device and method
  • Miniature photovoltaic array maximum power tracking device and method
  • Miniature photovoltaic array maximum power tracking device and method

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Embodiment Construction

[0031] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0032] The miniature photovoltaic array maximum power tracking device of the present invention is carried out around the output current and output voltage of the photovoltaic array, and accurate current and voltage sampling values ​​play an important role in calculating the output power of the photovoltaic array. Therefore, in the present invention, the current Hall sensor and the voltage Hall sensor are respectively used to sample the output current and output voltage of the photovoltaic array.

[0033] In the photovoltaic power generation system, the power generation of the photovoltaic array directly reflects the power generation efficiency of the photovoltaic power generation system. The purpose of the device of t...

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Abstract

The invention discloses a miniature photovoltaic array maximum power tracking device and a miniature photovoltaic array maximum power tracking method in the technical field of photovoltaic power generation. The tracking device comprises a sampling circuit, a master control unit, a switching tube driving circuit and a DC-DC converter, wherein the sampling circuit samples output current and output voltage of a photovoltaic array in real time and feeds the result into the master control unit; and the master control unit samples the output current and output voltage of the photovoltaic array and adjusts a duty ratio of a switching tube in the DC-DC converter so as to adjust the matched load of the photovoltaic array in real time; therefore, the photovoltaic array outputs the maximum power. Due to the adoption of a digital circuit, the device is not influenced by an external environment, and is high in tracking accuracy and high in stability.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a micro photovoltaic array maximum power tracking device and method. Background technique [0002] As one of the solutions to the global energy crisis and environmental problems, photovoltaic power generation has been rapidly promoted and applied. However, the power output of a photovoltaic array exhibits nonlinear characteristics and is affected by factors such as temperature, light intensity, external environment, load, etc., and changes with different operating voltages. Therefore, when using a photovoltaic array, it is necessary to perform maximum power point tracking MPPT (Maximum Power Point Tracking), a device is added between the photovoltaic array and the load to track the maximum output power of the photovoltaic array in real time, and improve the power generation efficiency of the photovoltaic array . [0003] Since the traditional m...

Claims

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Application Information

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IPC IPC(8): G05F1/67
CPCY02E10/58Y02E10/56
Inventor 吴小进魏学业
Owner BEIJING JIAOTONG UNIV
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