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Photovoltaic optimizer with integration of data communication function

A communication function and integrated data technology, applied in the direction of photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of large device size, complex system, high cost, etc., and achieve the effect of simple engineering installation, improved power generation efficiency, and improved reliability

Active Publication Date: 2014-09-24
ZHEJIANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the traditional design method uses different circuits and methods to realize the two functions of power conversion and information transmission, so there are still disadvantages such as complex system, many components, large device volume and high cost.

Method used

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  • Photovoltaic optimizer with integration of data communication function
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Embodiment Construction

[0043] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] like Figure 5 As shown, a photovoltaic optimizer with integrated data communication function, including DC-DC converter, signal sampling and conditioning circuit, digital controller and driving circuit. in:

[0045] The DC-DC converter is used to convert the output voltage of the photovoltaic module to achieve the maximum power output; in this embodiment, the DC-DC converter is realized by using the currently popular Buck-Boost topology. Since the ideal photovoltaic optimizer only starts to work under partial shade conditions, each photovoltaic module can work at the maximum power point. When the illumination is uniform and the photovoltaic characteristics are consistent, the photovoltaic optimizer will stop working to avoid affecting the photov...

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Abstract

The invention discloses a photovoltaic optimizer with the integration of a data communication function. According to the photovoltaic optimizer, a DC / DC converter controlled by a power / data double modulation strategy is employed, under the premise of not changing traditional photovoltaic optimizer power circuit topology, through superposing communication signal carrier wave at a traditional power adjustment link, data modulation is injected into a photovoltaic system DC bus, a receiving end samples output voltage and decodes data by using the corresponding DFT algorithm, and thus the communication between each photovoltaic optimizer and inverter is realized. Compared with the traditional technical scheme, according to the method of the invention, on the basis of not increasing circuit volume and cost, by using the communication function, the working of each photovoltaic optimizer and inverter is coordinated, and the power generation efficiency of a photovoltaic power generation system in a complex light condition is improved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation and Internet of Things communication, and in particular relates to a photovoltaic optimizer with integrated data communication function. Background technique [0002] Solar photovoltaic power generation has become the focus and trend of new energy development in the world because of its cleanness, safety, convenience, and suitability for distributed power generation. In photovoltaic systems, maximum power output control and fault detection are currently a research hotspot at home and abroad. A common photovoltaic power generation system generally consists of multiple photovoltaic modules connected in series / parallel to form a photovoltaic array, which outputs a DC voltage of 400-800V and then connects to the grid to generate electricity through an inverter. [0003] As we all know, the physical characteristics of photovoltaic cells are determined by semiconductor materials, ...

Claims

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Application Information

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IPC IPC(8): H02S40/30
CPCY02E10/50
Inventor 杜进王睿驰胡斯登吴建德何湘宁
Owner ZHEJIANG UNIV
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