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Maximum power point tracking (MPPT) controller for solar photovoltaic system and control method of MPPT controller

A solar photovoltaic and control method technology, applied in the field of solar cells, can solve the problems of inability to integrate MPPT controllers, high power consumption in real-time computing, complex algorithms, etc., to achieve maximum power output, facilitate integration, and reduce complexity. Effect

Inactive Publication Date: 2012-08-01
ZHEJIANG UNIV
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Problems solved by technology

However, real-time computing not only consumes a lot of power, but also requires complex algorithms, but it is difficult to implement these algorithms with circuits, which cannot be integrated, and there is no way to integrate MPPT controllers

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  • Maximum power point tracking (MPPT) controller for solar photovoltaic system and control method of MPPT controller
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  • Maximum power point tracking (MPPT) controller for solar photovoltaic system and control method of MPPT controller

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

[0035] figure 2 It is a schematic diagram of an embodiment of a photovoltaic array formed by the present invention, such as figure 2 As shown, this embodiment includes a solar cell module 1 and an MPPT controller 2 based on a look-up table method. Each solar cell module 1 is followed by a MPPT controller 2 based on a look-up table method, which is used to realize the maximum power point tracking of each solar cell module 1 .

[0036] image 3 It is a schematic diagram of ...

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Abstract

The invention discloses a maximum power point tracking (MPPT) controller for a solar photovoltaic system. The MPPT controller comprises a temperature sensor module, a control module, a memory module and a counter module, wherein the memory module receives data transmitted by the temperature sensor module and voltage and current data transmitted by the control module, looks up a local data table and finds out duty ratio data required for adjusting the current operating point to the maximum power point; and the counter module outputs a square wave which corresponds to a duty ratio to a driving circuit module according to the duty ratio data. By the control method of the MPPT controller, due to a method for looking up the data table, the position of the maximum power point is not required to be calculated or searched on site, and the duty ratio of a direct current-direct current (DCDC) circuit is adjusted at a time by utilizing the position of the calculated maximum power point in the table, so that a solar cell works in a maximum power point state. The power loss caused by continuous tracking or on-site calculation is avoided, and the circuit share complexity is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an MPPT controller of a solar photovoltaic system and a control method thereof. Background technique [0002] Most of today's photovoltaic systems form photovoltaic arrays by connecting solar panels in series and in parallel. However, when non-ideal conditions such as solar panels are in a shaded state or the solar panels do not match, the output power of the photovoltaic array will be greatly attenuated. Therefore, adding a maximum power point tracking MPPT (Maximum Power Point Tracking) controller to the photovoltaic system can realize the maximum power output of the photovoltaic system. The best situation is to place the MPPT controller behind each solar cell module. On the one hand, try to avoid the appearance of multiple peaks in the photovoltaic curve, and on the other hand, it can maximize the output power of the system. [0003] At present, most MPPT controllers are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67H02N6/00H02S40/30
CPCY02E10/58Y02E10/56
Inventor 刘放孙俊韩雁
Owner ZHEJIANG UNIV
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