Offshore wind profile model based on neutral equivalent wind speed and use method thereof

A technology of equivalent wind speed and wind profile, applied in the field of offshore wind resource research, can solve the problems of wind resource assessment error, influence of offshore wind resource assessment accuracy, deviation of power generation design value and actual operation value, etc.
CN113204731AActive Publication Date: 2021-08-03NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Publication Date
2021-08-03

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Abstract

The invention provides an offshore wind profile model based on a neutral equivalent wind speed, and the model comprises the steps: firstly inputting two height layer wind speeds, temperatures, a 10-meter height wind speed and a hub height, calculating the roughness, then calculating the Moom length, and then obtaining an equivalent wind speed u1n based on a neutral state, and obtaining ex-thrust hub height wind speed. The offshore wind profile model based on the neutral equivalent wind speed, provided by the invention, is obtained based on the influence of factors such as the wind shear index, the atmospheric stability and the turbulence intensity on the offshore wind resources.Compared with a traditional extrapolation method, the annual average wind speed and the wind power density of the hub height obtained by the model are closer to measured values, the wind speed root mean square error and the average absolute error are 0.43 m / s and 0.28 m / s respectively, the influence of sea surface dynamic roughness and atmospheric stability changes on offshore wind speed vertical distribution is effectively reflected, the defects of a traditional wind shear formula are overcome, and a basis is provided for offshore wind resource evaluation and early-stage planning of an offshore wind plant.
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Description

Technical field

[0001] The present invention belongs to the technical field of sea wind resources research, and specific relates to a marine wind profile model based on neutral equivalent wind speed. Background technique

[0002] my country's sea-style resource reserves are stable and close to the load center, and the development of sea wind power does not occupy the land. Therefore, sea wind power has become a hot spot in recent years, but due to the more complicated weather in the sea, the evaluation technology is still in the primary R & D phase, the feasibility demonstration is difficult. Therefore, the accuracy of improving the assessment of sea wind resources is the key to reducing investment risks in offshore wind power projects and improving core competitiveness. Under the marine atmospheric boundary layer is a complex sea surface, and the selection model of the marine surface status helps to in-depth at sea atmospheric boundary layer physical process, thereby increasing ...

Claims

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