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A wind energy assessment method based on effective wind speed

An effective wind speed, wind speed and wind direction technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of large differences in wind energy, statistical errors of wind energy, and inability to maintain consistency, etc., to achieve the effect of accurate wind energy

Active Publication Date: 2014-10-01
CHENGDU FORWARD TECH
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Problems solved by technology

And this traditional practice may bring unnegligible errors to wind energy statistics
An obvious adverse consequence is that the wind energy in the same period calculated from the average wind speed at different time scales such as seconds, minutes, and hours is very different and cannot be kept consistent

Method used

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  • A wind energy assessment method based on effective wind speed
  • A wind energy assessment method based on effective wind speed
  • A wind energy assessment method based on effective wind speed

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Embodiment Construction

[0020] In order to describe in detail the technical content, structural features, purpose and effect of the present invention, it will be described in detail below.

[0021] When evaluating the wind energy of a wind farm, the impact of changes in air density ρ on wind energy evaluation is one of the key influencing factors; at the same time, the wind speed of the wind farm is another key factor for the evaluation of wind energy. Two key influencing factors that change at any time cause great difficulties to the assessment of wind energy in wind farms. How to use simplified mathematical models and principles to effectively and accurately assess the status of wind energy is a major problem in wind energy assessment. At present, there is no effective method to evaluate wind energy.

[0022] A wind energy evaluation method based on effective wind speed of the present invention is suitable for wind energy evaluation of wind farms with air density ρ and wind speed of wind farms chan...

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Abstract

The invention discloses a wind energy evaluation method based on effective wind speed. The method comprises the steps of : (1) acquiring and obtaining data; (2) selecting a constant air density as a reference value according to the historical air density data of a wind farm; (3) conducting data treatment to calculate a plurality of effective wind speed and average wind power density in the smallest time interval; (4) conducting data treatment to convert the effective wind speed in the smallest time interval to the effective wind speed in an arbitrary larger time interval; and (5) conducting data treatment to evaluate the wind energy in the arbitrary larger time interval. The wind energy evaluation method based on the effective wind speed provided by the invention is applicable to wind energy evaluation of the wind farm with varying air density, and can not only accurately evaluate wind energy of the wind farm but obviate the influences of time segment length on the wind energy evaluation result.

Description

technical field [0001] The invention relates to a wind energy assessment method, in particular to a wind energy assessment based on effective wind speed. Background technique [0002] The construction and operation of wind farms are predicated on occupying enough wind energy resources. Accurate wind energy resource assessment has a great impact on ensuring the power generation and economic benefits of wind farms. In the process of site selection for a wind farm, it is necessary to investigate the meteorological records of the location over the years, set up an anemometer tower to actually measure the wind speed in the field, and obtain the wind power characteristics of the wind farm through statistics and analysis. [0003] Generally speaking, for various applications in different phases of the wind farm, the time length and time interval of the wind power data that needs to be known are also different. In the operation process of wind farms, in order to formulate long-ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 苗强柴建云
Owner CHENGDU FORWARD TECH
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