Method for evaluating wind speed time shifting

A time-shifting and wind speed technology, applied in the field of wind farms, can solve problems that are difficult to apply, have not yet been quantified, and cannot be optimized by the model

Pending Publication Date: 2021-02-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] (1) The physical method cannot optimize the model in real time according to the actual wind speed distribution, and the model accuracy is inversely proportional to the model complexity, which makes it difficult to apply to wind farms with complex terrain and wind farm groups that are commonly developed in patches in my country and wind power base
[0005] (2) The statistical method only realizes the quantification of the correlation between wind speed series, and the time shift between wind speeds is implicit in the spatial distribution and mapping relationship, which has not yet been quantified

Method used

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  • Method for evaluating wind speed time shifting
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  • Method for evaluating wind speed time shifting

Examples

Experimental program
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Effect test

Embodiment 1

[0069] The method for evaluating the time-shift of wind speed between remote wind power bases (when there is no influence of speed factor SF) includes the following steps:

[0070] Step 1: Data extraction and preprocessing; time series data of wind speed and wind direction at 5 spatial locations were collected respectively, the data time range was from January 1, 2004 to October 31, 2018, and the time resolution was 1h; for the above The data is cleaned and preprocessed, including inspection and screening, error data elimination, and reasonable interpolation and correction. figure 2 It is the relative position distribution diagram of each space point in embodiment 1;

[0071] Step 2: Determine the time window; set the time window to 1 day, that is, analyze and evaluate the time-shift of wind speed under the time window of 1 day (24h);

[0072] Step 3: Obtain the wind process set at the starting point 1#; divide the wind speed sequence and wind direction sequence at the start...

Embodiment 2

[0103] The method for evaluating the time shift of wind speed in a wind farm includes the following steps:

[0104] Step 1: Data extraction and preprocessing; collect the time series data of wind speed and wind direction at four spatial locations respectively, the data time range is from January 1, 2014 to December 31, 2014, and the time resolution is 1min; for the above The data is cleaned and preprocessed, including inspection and screening, error data elimination, and reasonable interpolation and correction. Figure 10 It is the relative position distribution diagram of each space point in embodiment 2.

[0105] Step 2: Determine the time window; set the time window to 1h, that is, analyze and evaluate the time shift of wind speed under the time window of 1h (60min);

[0106] Step 3: Obtain the wind process set at the starting point 1#; divide the wind speed sequence and wind direction sequence at the starting point 1# at the same time according to the 1h time window, and ...

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Abstract

The invention discloses a method for evaluating wind speed time shifting, and belongs to the technical field of wind power plants. By establishing a time shifting model between wind speed sequences atdifferent spatial positions, the step of evaluating the wind speed time shifting is designed, and two indexes including delay time DT and a speed factor SF are provided for quantitatively evaluatingthe time relation and the speed change condition between wind processes at different spatial positions. Time shifting characteristics among wind speed sequences at different spatial positions are quantitatively analyzed, and reliable technical support is provided for wind power plant design operation and power system scheduling. Research results of the method can be continuously perfected according to actual wind conditions, the method is suitable for any wind power plant and any spatial scale, the results can serve as effective measurement indexes of wind resource evaluation, and a theoretical basis is provided for research of output characteristics of the wind power plant.

Description

technical field [0001] The invention relates to the technical field of wind farms, in particular to a method for evaluating the time shift of wind speed. Background technique [0002] The rapid expansion of wind power grid-connected scale has led to the increasing impact of random fluctuations in wind power output on power grid dispatching, safe and stable operation of power systems, and power quality. Since the output of wind turbines is positively correlated with the cube of wind speed, the study of wind speed is very important. How to dig out the temporal-spatial coupling relationship of wind speed from the wind speed sequence fluctuating randomly at different spatial positions is of great significance to wind farm (group) climbing events, possible extreme events, and reducing the impact of wind power grid-connected on the grid. It is also related to the efficiency of wind farms and the grid connection ratio of wind power in the grid. [0003] Existing studies on the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06K9/62G06Q10/06G06Q50/06G06F113/04G06F113/06
CPCG06F30/27G06Q10/06393G06Q50/06G06F2113/06G06F2113/04G06F18/23
Inventor 韩爽王函刘永前阎洁李莉孟航张永蕊
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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