System and method for rapid optimizing of maximum power point of photovoltaic array under shadow condition

A maximum power point and photovoltaic array technology, applied in photovoltaic power generation, control/regulation systems, instruments, etc., can solve the problems of battery performance degradation, photovoltaic array output power reduction, photovoltaic array energy not being fully utilized, etc., to speed up the search Speed ​​and accuracy, the effect of fast optimization

Active Publication Date: 2014-02-19
STATE GRID CORP OF CHINA +2
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Problems solved by technology

On the one hand, it will reduce the overall output power of the photovoltaic array, and on the other hand, it will interfere with the maximum power point tracking control, so that the commonly used maximum power tracking (MPPT) algorithms, such as the perturbation and observation method and the admittance incremental method, may be used in In this case, the failure m

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  • System and method for rapid optimizing of maximum power point of photovoltaic array under shadow condition
  • System and method for rapid optimizing of maximum power point of photovoltaic array under shadow condition

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[0023] Example: A quick optimization system for the maximum power point of photovoltaic array under shadow conditions (see figure 1 ), characterized in that it includes a photovoltaic battery pack and an MPPT controller; wherein, the MPPT controller includes an A / D conversion module, an A / D control module, an optimal MPPT module, a PWM module, a bridge drive module, and a DC / DC module; the input terminal of the A / D conversion module collects the voltage and current data of the photovoltaic cell module, and its output terminal is connected to the input terminal of the A / D control module; the input terminal of the MPPT module is connected to the output of the A / D control module The output terminal is connected with the input terminal of the PWM module; the input terminal of the bridge drive module is connected with the output terminal of the PWM module, and the output terminal is connected with the DC / DC module that outputs voltage signals.

[0024] The A / D conversion module is an...

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Abstract

The invention discloses a system for rapid optimizing of a maximum power point of a photovoltaic array under the shadow condition. The system for the rapid optimizing of the maximum power point of the photovoltaic array under the shadow condition is characterized in that the system comprises a photovoltaic cell set and an MPPT controller. The method for the rapid optimizing of the maximum power point of the photovoltaic array under the shadow condition comprises the steps of (1) preparation of data, (2) initialization of a program, (3) judgment of shadow covering, (4) adjustment of a duty ratio, and (5) searching of a maximum power point. The system and method for the rapid optimizing of the maximum power point of the photovoltaic array under the shadow condition have the advantages that the voltage of a position with the maximum power in the whole area can be found rapidly, the searching speed can be increased, searching accuracy can be improved, and the rapid optimizing of the maximum power point of the photovoltaic array under the shadow condition can be achieved without the need of extra arrangement of components.

Description

(1) Technical field: [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular proposes a system and method for quickly finding the maximum power point of a photovoltaic array under shadow conditions. (2) Background technology: [0002] As an emerging green energy, solar power is being rapidly popularized and applied due to its advantages of inexhaustibility, no pollution, and no geographical restrictions. The solar photovoltaic power generation system uses one or more photovoltaic modules connected in series / parallel to convert solar energy into DC power, and then converts it into various forms of power for loads through power electronic converters. However, photovoltaic arrays are easily affected by shadows (local shadows) produced by surrounding buildings, trees, clouds, and dust on the surface of photovoltaic panels, which changes the output characteristics of photovoltaic arrays. The P-V curve is no longer a simple single-pe...

Claims

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Application Information

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IPC IPC(8): G05F1/67
CPCY02E10/58Y02E10/56
Inventor 岳巍澎周雪松沈雪波马幼捷朱斯王婧任巍曦董文琦刘志豪杨猛李明翟化欣程东霞
Owner STATE GRID CORP OF CHINA
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