Photovoltaic array maximum power point tracking controller for photovoltaic power generation system
A photovoltaic power generation system and maximum power point technology, which is applied in photovoltaic power generation, control/regulation systems, output power conversion devices, etc., can solve problems such as local maximum power points, and achieve the effect of avoiding interference and tracking the process quickly and accurately
Active Publication Date: 2022-02-18
杭州云视物联科技有限公司
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[0005] In order to overcome the defect that the existing MPPT control method is easy to fall into the local maximum power point or find the possibility of finding the second maximum power point, the present invention proposes a photovoltaic array maximum power point tracking controller for photovoltaic power generation systems, which can assist power converters Quickly and accurately lock the global maximum power point of the photovoltaic array system, and deliver the power of the photovoltaic array system to the load as much as possible for its use
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[0029] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the embodiments described here are for illustration only, and are not intended to limit the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by one of ordinary skill in the art that these specific details are not required to practice the present invention. Additionally, in some embodiments, well-known circuits, materials or methods have not been described in detail in order not to obscure the present invention.
[0030]Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Th...
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A photovoltaic array maximum power point tracking controller for a photovoltaic power generation system, comprising a voltage / current detection and processing module, an array maximum power point curve family register, a first sub-controller and a second sub-controller. The controller first looks for the intersection point of the output current-voltage curve of the photovoltaic array system and the array maximum power point curve family, and then selects the best intersection point (that is, the intersection point with the maximum power) from each intersection point, and finally based on the best intersection point Find the global maximum power point of the PV array system. The invention has the ability of accurate and fast global maximum power point tracking.
Description
technical field [0001] The invention relates to a photovoltaic power generation system, in particular to a photovoltaic array maximum power point tracking controller and a photovoltaic array maximum power point tracking method suitable for the photovoltaic power generation system. Background technique [0002] When in the form of an array, photovoltaic modules can achieve expansion. When the shading conditions are different, the maximum power point (MPP, maxim power point) of the same photovoltaic array system will show different distributions. That is, the maximum power point of the photovoltaic array system is different under the conditions of no shadow, static shadow and dynamic shadow. Moreover, under static and dynamic shading conditions, the output P-V (i.e. power-voltage) curve of the photovoltaic array system presents multiple peaks, and the output I-V (i.e. current-voltage) curve of the photovoltaic array system presents multiple monotonic regions, and the local ma...
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IPC IPC(8): G05F1/67H02M3/00
CPCG05F1/67H02M3/00Y02E10/56
Inventor 杨益平陈怡
Owner 杭州云视物联科技有限公司