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Efficient identification method for equivalent circuit model parameters of photovoltaic module

An equivalent circuit model, photovoltaic module technology, applied in computational models, biological models, electrical digital data processing and other directions, can solve the problems of the accuracy of the solution results need to be improved, the performance is slow, the solution is unstable, etc., to increase population development. ability, the effect of improving quality

Pending Publication Date: 2021-07-30
XIAN UNIV OF TECH
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Problems solved by technology

Although the meta-heuristic algorithm can obtain relatively superior results, the accuracy of the solution results needs to be improved, and there are also shortcomings such as slow performance, unstable solution, and immature convergence.

Method used

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  • Efficient identification method for equivalent circuit model parameters of photovoltaic module
  • Efficient identification method for equivalent circuit model parameters of photovoltaic module
  • Efficient identification method for equivalent circuit model parameters of photovoltaic module

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Embodiment

[0070] The following takes Photowatt-PWP201 polysilicon module as an example (it is also applicable to other modules). The module consists of 36 strings of cells connected in series, the measured temperature is 45°C, and the measured light intensity is 1000W / m2.

[0071] Firstly, the voltage and current waveforms are collected by voltage and current sensors as the original signal x(t). The mathematical model of photovoltaic modules is established, the maximum number of iterations is 3000, the population size is 50, the boundary constraints of the parameters are set, and the population is initialized. For the purpose of optimizing the minimum root mean square error value, the expansion rate of each universe in the initial population is calculated and standardized, and the universes are sorted according to the calculated expansion rate, and the white hole is selected through roulette, and then Swaps the object of the white hole to the current universe. According to the self-ad...

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Abstract

The invention discloses an efficient identification method for parameters of an equivalent circuit model of a photovoltaic module, and the method comprises the steps: improving the development capability of a population through a parameter adjustment strategy for correcting a wormhole existence probability WEP based on an enhanced dynamic elite multivariate universe algorithm; a parameter adjustment strategy for adjusting the travel distance rate TDR by relying on the current population quality is introduced to prevent search from falling into local optimum; the travel based on a dynamic elite strategy is adopted to improve the success probability of each universe travel, and model parameters can be rapidly, accurately and stably solved under the minimum calculation amount all the time. Besides, an accurate photovoltaic module mathematical model is established, so that the output characteristics of the system are accurately evaluated, and the method is of great significance to system performance evaluation, fault analysis and operation and maintenance guidance.

Description

technical field [0001] The invention belongs to the technical field of power equipment operation and maintenance, and in particular relates to a method for efficiently identifying parameters of a photovoltaic module equivalent circuit model. Background technique [0002] In recent years, photovoltaic power generation has been widely used in power supply, and the scale of power generation is getting larger and larger, which puts forward higher requirements for the technical performance of the system. Accurately establishing the photovoltaic power generation system model and determining the model parameters have important theoretical and practical significance for the performance evaluation, power generation efficiency calculation and maximum power point tracking of the photovoltaic power generation system. At present, researchers have studied and developed a variety of equivalent circuit models of solar cells, among which the single diode model is the most widely used. The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/367G06N3/00G06F111/04G06F111/08G06F113/04
CPCG06F30/367G06N3/006G06F2111/08G06F2111/04G06F2113/04
Inventor 党建夏超浩贾嵘王高明
Owner XIAN UNIV OF TECH
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