MPPT (Maximum Power Point Tracking) algorithm for photovoltaic module based on parameter identification

A photovoltaic module and parameter identification technology, applied in computing, electrical digital data processing, special data processing applications, etc., can solve problems such as slow dynamic response and poor steady-state accuracy, and achieve the effect of increasing speed and high accuracy

Active Publication Date: 2016-05-18
江苏瑞特电子设备有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a parameter identification-based photovoltaic module MPPT algorithm. The present invention effectively solves the problems of slow dynamic response and poor steady-state accuracy in the traditional commonly used photovoltaic module MPPT algorithm.

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  • MPPT (Maximum Power Point Tracking) algorithm for photovoltaic module based on parameter identification
  • MPPT (Maximum Power Point Tracking) algorithm for photovoltaic module based on parameter identification
  • MPPT (Maximum Power Point Tracking) algorithm for photovoltaic module based on parameter identification

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Embodiment Construction

[0046] Attached below figure 1 , 2 , 3, the present invention is described in detail:

[0047] Based on the programmable DC electronic load, the data of the photovoltaic module is measured. Taking the TSM-250PC05A photovoltaic module as an example, for the convenience of solving, N=32 can be selected. Under actual operating conditions, the current light intensity S and ambient temperature T are measured by the solar pyranometer TBQ-2 and the temperature sensor PT100, respectively.

[0048] Usually, the equivalent circuit model of a photovoltaic cell is as figure 1 As shown, the model parameters mainly include: photogenerated current (I ph ), diode reverse saturation current (I SD ), diode ideal quality factor (n) and equivalent series-parallel resistance (R s , R sh ).

[0049] In practical applications, a photovoltaic module consists of N s = 60 photovoltaic cells connected in series, then the equivalent circuit equation of Kirchhoff’s current law (KCL) of photovoltai...

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Abstract

The invention discloses an MPPT (Maximum Power Point Tracking) algorithm for a photovoltaic module based on parameter identification. The MPPT algorithm comprises the following steps of obtaining the current environment condition and a corresponding I-V output characteristic curve of the photovoltaic module in real time; utilizing an IAFSA (Improved Artificial Fish Swarm Algorithm) to carry out parameter identification on equivalent parameters in the photovoltaic module according to sampling points of the current I-V output characteristic curve; obtaining maximum output power under the current work condition by carrying out explicit solution on the output power of the photovoltaic module through a Newton iteration method; adopting an adaptive PI (Proportional Integral) control algorithm to realize MPPT of the photovoltaic module; and if a change value of the output power exceeds a preset value, restarting the Newton iteration solution process to realize a new round of MPP (Maximum Power Point) searching process. According to the MPPT algorithm, the problems of slow dynamic response and poor steady accuracy of the conventional common MPPT algorithm for the photovoltaic module are effectively solved.

Description

technical field [0001] The invention relates to the technical field of MPPT algorithms for photovoltaic modules, in particular to a parameter identification-based MPPT algorithm for photovoltaic modules. Background technique [0002] With the shortage of traditional energy and the increasingly severe environmental pollution problems, countries all over the world are trying to replace traditional fossil energy with clean, pollution-free renewable energy, hoping to achieve the purpose of protecting the environment and ecology. Solar energy is undoubtedly an ideal energy source in line with the sustainable development strategy. It has the advantages of cleanliness, renewability, safety and flexibility of use. Therefore, photovoltaic power generation has huge economic benefits and broad development prospects, and is one of the renewable energy power generation technologies that countries are focusing on developing. [0003] In the application process of photovoltaic power gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 陈华宝方绍康胡玉忠葛恒清于海春陈凌
Owner 江苏瑞特电子设备有限公司
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