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Trend fitting based wind power intraday fluctuation continuous period recognition method and system

An identification method and time period technology, which is applied in the fields of electrical digital data processing, instruments, calculations, etc., and can solve the problem of identification of the degree of fluctuation of the output that cannot be output.

Inactive Publication Date: 2015-01-07
WUHAN UNIV
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Problems solved by technology

Most of the existing methods focus on judging the fluctuation degree of output in the whole output process or a certain period of time, and cannot identify the output fluctuation degree of certain continuous periods in the output process

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  • Trend fitting based wind power intraday fluctuation continuous period recognition method and system
  • Trend fitting based wind power intraday fluctuation continuous period recognition method and system
  • Trend fitting based wind power intraday fluctuation continuous period recognition method and system

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Embodiment Construction

[0066] During specific implementation, the technical solution of the present invention can use computer software technology to realize the automatic operation process. In order to prove the rationality of the technical solution of the present invention, the embodiment takes the measured daily output process line of a wind farm in a wind power base in my country as an example to identify fluctuation periods. The process of the embodiment includes the following steps:

[0067] Step 1, analyze the wind power output process line

[0068] The wind power output process line is a curve obtained in the Cartesian coordinate system according to the process of output, with time t as the abscissa and wind power output P as the ordinate; the analysis process includes analyzing the wind power output process line as being connected by several points Assume that there are N points in total, which are respectively used as control points and numbered from left to right as 1, 2, ..., N, (usuall...

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Abstract

The invention discloses a trend fitting based wind power intraday fluctuation continuous period recognition method and system. The trend fitting based wind power intraday fluctuation continuous period recognition method comprises performing analysis on a wind power output process line, performing subinterval length division, trend fitting and overlapped portion fitting according to characteristic parameters of different subintervals and obtaining the integral process line fitting sequence and performing fluctuation sensitivity fitting, fluctuation recognition and continuous period recognition. According to the trend fitting based wind power intraday fluctuation continuous period recognition method and system, the period of the wind power output process line fluctuation is automatically extracted and accordingly a new judgment and recognition mode is provided, the result is simple and clear, and the implementation is convenient and easy. Compared with the prior art, the new way is provided for the period level of wind power output process line fluctuation recognition, the important innovation is achieved, the judgment of the wind power output stability analysis is facilitated, the wind power operation cost can be reduced, the wind power application efficiency can be improved, and the important actual application significance is brought to the wind power operation management and the wind power compensation adjustment.

Description

technical field [0001] The invention relates to the field of wind power operation stability analysis, in particular to a method and system for identifying intraday fluctuation periods of wind power based on trend fitting. Background technique [0002] Wind power operation stability analysis research is mainly used to provide decision support for wind power operation management and wind power compensation adjustment. Improving the accuracy of wind power operation stability analysis is of great significance for improving wind energy utilization, energy saving and emission reduction. The main feature of the wind power fluctuation period is that the wind power output fluctuates greatly during this period. At present, the domestic and foreign methods for describing the fluctuation degree of wind power output mainly include: the standard deviation of output, the sum of the absolute values ​​of output differences in adjacent periods, the first-order difference probability distribu...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王现勋梅亚东孔艳君杨璐魏翔徐雨妮
Owner WUHAN UNIV
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