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Photovoltaic power generation system output power modeling and estimation method

A photovoltaic power generation system and output power technology, which can be used in computing, electrical digital data processing, special data processing applications, etc., and can solve problems such as inconvenient solutions and many model parameters.

Active Publication Date: 2014-02-19
常州九洲裕光新能源有限公司
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Problems solved by technology

However, the model has many parameters, and it is inconvenient to solve

Method used

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  • Photovoltaic power generation system output power modeling and estimation method
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  • Photovoltaic power generation system output power modeling and estimation method

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Embodiment Construction

[0058] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0059] For the distributed grid-connected system built by Hohai University, the present invention adopts such figure 2 The flow method of the system is used to estimate the output DC power of the system.

[0060] Such as figure 1 As shown, the grid-connected system consists of 44 TMS-PC05240W modules produced by Changzhou Trina Solar in series and parallel. The characteristic parameters of this type of photovoltaic module under standard test conditions are shown in the table below:

[0061]

[0062] Among them, the open circuit voltage radiation correction coefficient a is the outdoor measured value. After obtaining the open circuit voltage V of the photovoltaic module under standard test conditions OC,ref , short-circuit current I SC,ref ,...

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Abstract

The invention discloses a photovoltaic power generation system output power modeling and estimation method. The photovoltaic power generation system output power modeling method comprises the steps of establishing a photovoltaic module current-voltage characteristic model according to a solar cell current-voltage characteristic model, simplifying the photovoltaic module current-voltage characteristic model, and establishing a photovoltaic power generation system output power model according to the simplified photovoltaic module current-voltage characteristic model. The photovoltaic power generation system output power estimation method comprises the steps of establishing the photovoltaic power generation system output power model, acquiring characteristic parameters under photovoltaic module standard test conditions, obtaining parameters in the output power model, obtaining original meteorological parameters, correcting the meteorological parameters into photovoltaic module actual operating temperature and absorbed effective irradiation, and inputting the corrected meteorological parameters to the model to obtain photovoltaic module output power. By means of the photovoltaic power generation system output power modeling and estimation method, accurate estimation of output power of a photovoltaic power generation system can be realized, power station designers can be helped to carry out benefit analysis, and prediction of the output power of the photovoltaic power generation system is realized.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a method for modeling and estimating output power of a photovoltaic power generation system. Background technique [0002] The power generation of photovoltaic power generation systems is greatly affected by meteorological factors, especially by solar irradiance and ambient temperature. In recent years, the total amount of photovoltaic power plants installed in China has increased year by year. When weather conditions change drastically, large-scale installations of photovoltaic power plants will seriously affect the stability of the power grid and reduce power quality. In addition, for photovoltaic power generation system designers, it is particularly important to pre-estimate the power generation of the power station to be built. Therefore, it has become more and more important to establish an accurate photovoltaic power generation system output power model and acc...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张经炜丁坤卞新高徐俊伟翟泉新王祥
Owner 常州九洲裕光新能源有限公司
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