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A Construction Method of Wind Speed ​​Prediction Model Based on Wake Effect

A technology for wind speed prediction and wake effects, applied in forecasting, data processing applications, special data processing applications, etc., can solve problems such as inaccurate calculations

Active Publication Date: 2020-10-20
ZHONGNENG POWER TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current existing wake models are not accurate enough in the actual calculation process, and there are large errors

Method used

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  • A Construction Method of Wind Speed ​​Prediction Model Based on Wake Effect
  • A Construction Method of Wind Speed ​​Prediction Model Based on Wake Effect
  • A Construction Method of Wind Speed ​​Prediction Model Based on Wake Effect

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] 1. Data acquisition

[0046] The measurement site selected in this example is Jiangsu Rudong Offshore Wind Farm. The wind farm is close to the shore, and the farthest distance is 6km from the land. Siemens, Goldwind, Sinovel and other mixed wind turbines are installed in the wind farm. , the parameters of the first three main fans are shown in Table 1. The distance between two adjacent wind turbines is between 0.5 and 1km. The four wind-measuring towers are respectively located in the two fields, on the east side and on land, with a measurable height of 30-100m. The measurement area is the northwest corner of the wind field, where the altitude is -10m, the tidal range is 10m, there is a beach after the ebb tide, and an offshore platform can be built.

[0047] like figure 2 Shown is the location setting diagram of offshore wind turbines and ...

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Abstract

The invention provides a method of building a wind speed prediction model based on a wake effect, comprising the following steps: A, acquiring the wind speed decay rate at a specified measuring point behind a fan according to the acquired incoming wind speed of the fan and the wind speed at the specified measuring point; and acquiring the polar coordinate matrix of the specified measuring point, the yaw angle of the fan, the incoming wind direction and the blade diameter of the fan; B, building a wind speed decay rate model according to the relationship between the decay rate of the specified measuring point on one hand and the polar coordinate matrix of the specified measuring point, the yaw angle of the fan, the incoming wind direction and the blade diameter of the fan on the other hand; C, correcting the wind speed decay rate model to get a corrected wind speed decay rate model; and D, building a wind speed prediction model according to the wind speed decay rate model. Reference can be provided for fan position setting, fan blade design and power generation prediction according to the wind speed acquired using the prediction model.

Description

technical field [0001] The invention relates to the technical field of wind farm modeling, in particular to a method for constructing a wind speed prediction model based on wake effects. Background technique [0002] The running fan absorbs wind energy and forms a wake effect downstream of it, which will reduce the output of the units operating in the wake area, resulting in increased structural fatigue. The wake can be divided into near wake and far wake according to the region. The near wake refers to the area within one diameter behind the fan, where the role of the impeller is obvious, and the physical process of energy absorption and the performance of the fan are mainly studied; the far wake refers to the area outside the near wake, and the main focus is on the fan in the wind field environment. However, it is not important to simulate real blades. We mainly study the wake model, turbulence model, and terrain effects, and pay more attention to the interaction between ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06G06F30/20G06F111/08G06F113/06G06F113/08
CPCG06F30/20G06Q10/04G06Q50/06
Inventor 史书睿朱志成张吉包大恩董礼涛张秋生邓星李书博
Owner ZHONGNENG POWER TECH DEV