A Modeling and Estimation Method for Output Power of Photovoltaic Power Generation System

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 many model parameters and inconvenient solutions.

Active Publication Date: 2016-08-17
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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  • A Modeling and Estimation Method for Output Power of Photovoltaic Power Generation System
  • A Modeling and Estimation Method for Output Power of Photovoltaic Power Generation System
  • A Modeling and Estimation Method for Output Power of Photovoltaic Power Generation System

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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 method for modeling and estimating the output power of a photovoltaic power generation system. The method for modeling the output power of the photovoltaic power generation system includes: establishing a current-voltage characteristic model of a photovoltaic module according to a current-voltage characteristic model of a solar cell; simplifying the current-voltage characteristic model of a photovoltaic module; The output power model of photovoltaic power generation system is established according to the simplified current and voltage characteristic model of photovoltaic modules. The method for estimating the output power of a photovoltaic power generation system includes: creating a photovoltaic power generation system output power model; obtaining the characteristic parameters of the photovoltaic module under standard test conditions, and solving the parameters in the output power model; obtaining the original meteorological parameters; correcting the meteorological parameters to the actual working conditions of the photovoltaic module Temperature and absorbed effective radiation; input the corrected meteorological parameters into the model to solve the output power of photovoltaic modules. The invention can realize accurate estimation of the output power of the photovoltaic power generation system, help power station designers to conduct benefit analysis, and realize the output power prediction of the photovoltaic power generation system.

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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Patent Type & Authority Patents(China)
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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