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Universal data preprocessing device and method for wind power prediction

A wind power prediction and data preprocessing technology, which is applied in the direction of electrical digital data processing, special data processing applications, circuit devices, etc., can solve the problems of inconsistency in the historical measurement power of wind farms, and achieve the effect of solving the inconsistency problem

Active Publication Date: 2012-07-04
XI AN JIAOTONG UNIV
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Problems solved by technology

This invention aims to solve the problem of inconsistency between the historical NWP data and the historical measured power of the wind farm, automatically judge whether the wind farm has been expanded and take corresponding measures, and improve the adaptability and engineering practicability of the wind farm power prediction method

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  • Universal data preprocessing device and method for wind power prediction
  • Universal data preprocessing device and method for wind power prediction
  • Universal data preprocessing device and method for wind power prediction

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Embodiment Construction

[0058] The present invention is described in further detail below in conjunction with accompanying drawing:

[0059] see Figure 1-6 , the key to the success of statistical prediction lies in the consistency between the NWP data and the output power of the wind farm. However, in actual operation, the same wind speed may correspond to a large number of different output powers. figure 1 shown. The problem of wind farm expansion may occur during the operation of the forecasting system, resulting in inconsistency between the NWP data and the output power of the wind farm, such as figure 2 shown. At this time, if the historical data is directly used for wind power prediction, it is difficult to obtain the statistical law between NWP data and wind farm output power.

[0060] In view of the above problems, the present invention proposes a general data preprocessing method and device for wind power prediction, which solves the above problems. The data preprocessing device propos...

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Abstract

The invention discloses a universal wind power station historical data preprocessing method and device for wind power prediction. The universal wind power station historical data preprocessing method comprises the following steps of: forming NWP (Numerical Weather Prediction) data and a statistical fit curve of actually-measured power of a wind power station by adopting a statistical fit method, and eliminating remarkable power abnormal points caused by electricity limiting, NWP fault and the like under the condition of considering a certain error range; and judging whether expansion exists in the wind power station according to the comparison between the actually-measured power of the wind power station as well as the statistical fit curve and corresponding historical data, and selecting a corresponding sample updating frequency to ensure that effective samples are concentrated to serve as latest effective data of the wind power station. The data preprocessing device for wind power prediction, disclosed by the invention, can be conveniently integrated into various wind power prediction systems and further improves the prediction precision, the engineering practicability and the self-adaptive capability of the wind power system.

Description

technical field [0001] The invention belongs to the field of wind farm power prediction, and relates to a short-term wind power prediction device and method, in particular to a general data preprocessing device and method for wind power prediction. Background technique [0002] Due to the depletion of fossil fuels, wind energy, as a clean and non-polluting renewable energy, has attracted more and more attention from all over the world. However, due to the intermittence and volatility of wind energy, the large-scale access of wind power will have a huge impact on the power grid, and will increase the difficulty of real-time operation scheduling and power flow control of the power system. Therefore, it is of great significance to predict the power generation of wind farms. [0003] By making short-term predictions on the output of wind farms, the power dispatching department can adjust the scheduling plan according to changes in wind power output, reduce the reserve capacity ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F19/00
CPCY02A30/00
Inventor 别朝红安佳坤贺旭伟陈筱中
Owner XI AN JIAOTONG UNIV
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