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Offshore wind power plant generating capacity calculating method

A calculation method and wind farm technology, applied in calculation, instrumentation, data processing applications, etc., can solve problems such as seldom considering the thermal stability of wind farms, reducing the prediction accuracy of wind farm aerodynamic field, etc.

Active Publication Date: 2017-03-29
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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Problems solved by technology

Thermal stability has an important influence on the aerodynamic field of offshore wind farms. However, most of the current research on the micro-scale aerodynamic field of wind farms is carried out under neutral atmospheric conditions, and the thermal stability of wind farms is rarely considered. The prediction accuracy of wind farm aerodynamic field is improved

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  • Offshore wind power plant generating capacity calculating method
  • Offshore wind power plant generating capacity calculating method
  • Offshore wind power plant generating capacity calculating method

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Embodiment Construction

[0093] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0094] The invention provides a method for calculating the power generation of an offshore wind farm, such as figure 1 shown, including the following steps:

[0095] 1) Collect the wind measurement data of the wind measurement tower built in the offshore wind farm for one year, the wind measurement data includes the wind speed, wind direction and temperature data of different heights measured by the wind measurement tower in the same wind measurement year, wherein different heights include The height of 10m from the sea surface and the hub height H of the wind measuring tower; the offshore wind farm here includes the existing offshore wind farm or its adjacent areas.

[0096] 2) Use the wind speed data at a height of 10m above the sea surface and the calculation formula of sea surface roughness to solve the sea surface roughness z 0 ;

[0097] Considering...

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Abstract

The invention discloses an offshore wind power plant generating capacity calculating method comprising the following steps: wind measurement data is collected, sea surface roughness is solved, a Richardson number method is used for solving a Richardson number and determining heat stability of an offshore wind power plant, Monin length is solved, and wind speed data is solved after a wind contour model is corrected; a Jensen wake flow model is corrected and constants in different corresponding wake flow dissipation coefficients are assigned to different heat stability of the offshore wind power plant, speed of wind in front of wind wheels of a downstream machine unit under influence of wake flows of a single machine unit is solved, speed of wind in front of the wind wheels of the downstream machine unit under influence of wake flows of a plurality of machine units is solved, output power of the single machine unit under conditions of different heat stability of the offshore wind power plant is solved, annual total power generation quantities of the single machine unit under conditions of different heat stability of the offshore wind power plant are respectively calculated, and annual total power generation quantities of the offshore wind power plant are calculated. Difference of wind energy distribution in different zones and different time in the offshore wind power plant is fully considered, and power generation quantities of the offshore wind power plant can be quickly and accurately calculated.

Description

technical field [0001] The invention relates to a method for calculating power generation, in particular to a method for calculating power generation of an offshore wind farm, and belongs to the technical field of wind resource calculation for offshore wind farms. Background technique [0002] my country's offshore wind energy resources are abundant and close to the load center, but the development of the offshore wind power industry has been slow in recent years. With the advancement of technology and the continuous implementation of policies, large-scale offshore wind power projects have started construction one after another, and offshore wind power will usher in a period of rapid development. [0003] With the development of the offshore wind power industry, it is of great significance to improve the accuracy of offshore wind energy assessment. Sea surface roughness and atmospheric thermal stability are the main factors affecting offshore wind energy. Sea surface roughn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 彭秀芳项雯刘欣良胡煜王磊张宇
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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