NB/T 10387-2020 English PDF

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NB/T 10387-2020: (Technical specification for small-scale numerical simulation of wind energy resources in offshore wind farms)
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Basic data

Standard ID: NB/T 10387-2020 (NB/T10387-2020)
Description (Translated English): (Technical specification for small-scale numerical simulation of wind energy resources in offshore wind farms)
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: P61
Classification of International Standard: 27.180
Word Count Estimation: 30,332
Date of Issue: 2020-10-23
Date of Implementation: 2021-02-01
Older Standard (superseded by this standard): NY/T 738-2003
Regulation (derived from): National Energy Administration Announcement No. 5 [2020]
Issuing agency(ies): National Energy Administration

NB/T 10387-2020: (Technical specification for small-scale numerical simulation of wind energy resources in offshore wind farms)

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Technical Specification for Small-Scale Numerical Simulation of Wind Energy Resource for Offshore Wind Power Projects Energy Industry Standards of the People's Republic of China Small-scale numerical simulation of wind energy resources in offshore wind farms Technical regulations 2020-10-23 released 2021-02-01 implementation

Foreword

According to the National Energy Administration’s issue of the.2016 energy sector industry standard system (revision) Requirement of the “Notice of Planning a Plan” (Guoneng Technology [2016] No. 238), the Extensive investigation and research, earnestly summarizing practical experience, and on the basis of extensive solicitation of opinions, Make this regulation. The main technical content of this regulation is. basic regulations, basic data, models and parameters, Numerical simulation, simulation results and verification, uncertainty analysis. This regulation is managed by the National Energy Administration, and is proposed by the General Institute of Hydropower and Water Conservancy Planning and Design. Responsible for day-to-day management, divided by the wind farm planning and design of the Wind Power Standardization Technical Committee of the Energy Industry The technical committee is responsible for the interpretation of specific technical content. If you have comments or suggestions during the implementation process, Please send it to the General Institute of Hydropower and Water Conservancy Planning and Design (Address. No. 2 Kangbei Street, Liupu, Xicheng District, Beijing No., Zip Code. 100120). Editor-in-chief of this regulation. Northwest Survey, Design and Research Institute Co., Ltd. of China Power Construction Corporation General Institute of Hydropower and Water Conservancy Planning and Design Fujian Xinneng Offshore Wind Power R&D Center Co., Ltd. Participating unit of this regulation. Shanghai Survey, Design and Research Institute Co., Ltd. China Power Construction Group Zhongnan Survey, Design and Research Institute Co., Ltd. Wind and Solar Resource Center of China Meteorological Administration Guangdong Wind Power Co., Ltd. Envision Energy Co., Ltd. Fujian Yongfu Electric Power Design Co., Ltd. China Power Investment Power Engineering Co., Ltd. The main drafters of this regulation. Peng Huaiwu, Yuan Hongliang, Ji Chaoying, and Liu Wei Dong Delan Huang Jieting Wu Haitao Wang Lei Peng Ming Zhou Rongwei Yuan Yibo Miao Mulu Liu Donghai Jin Yangkun Li Xin Yang Yonghui Main reviewer of this regulation. Xie Hongwen, Tian Qiming, Shang Xiongbin, Tian Jingkui Guo Chen Xu Chang Zhu Xuemin Hu Wei He Xiaobing Lu Zhouan Song Jun Fu Bin Wang Jun Guo Weizhao Lu Yanyan Wen Peng Wang Chuan Liu Chao Li Shisheng

Table of contents

1 General...1 2 Terminology...2 3 Basic regulations...3 4 Basic information...4 5 Models and parameters...5 5.1 General provisions...5 5.2 Linear fluid dynamics model...5 5.3 Nonlinear fluid dynamics model...5 5.4 Wake model...6 6 Numerical simulation...7 7 Simulation results and verification...8 8 Uncertainty Analysis...9 Explanation of terms used in this regulation...10 List of Reference Standards...11 Attachment. Article description...12

1 General

1.0.1 In order to standardize the small-scale numerical simulation of wind energy resources in offshore wind farms, promote offshore wind energy resources For the efficient development and utilization of sources, this regulation is formulated. 1.0.2 This regulation is applicable to small-scale numerical simulation of wind energy resources in offshore wind farms. 1.0.3 Small-scale numerical simulation of wind energy resources in offshore wind farms shall not only comply with this regulation, but also It should comply with the provisions of the relevant national standards.

2 term

2.0.1 Small-scale numerical simulation of wind energy resources wind energy resource Wind field flow with horizontal spacing of 1 m~1000 m of finite element grid using computer Numerical simulation calculation of body mechanics model. 2.0.2 Linear fluid dynamics model A mathematical model based on solving linearized fluid mechanics equations. 2.0.3 Nonlinear fluid dynamics model Solve the mathematical model of nonlinear fluid mechanics equations based on numerical calculation methods.

3 Basic regulations

3.0.1 In the small-scale numerical simulation calculation of wind energy resources of offshore wind farms, Islands, other wind farms, and wind farms affected by buildings (structures) should use nonlinear fluid force Learning model. 3.0.2 For wind farms that are not affected by surrounding factors, offshore wind farms have small-scale wind energy resources The numerical simulation should adopt the linear fluid dynamics model. 3.0.3 Small-scale numerical simulation of wind energy resources in offshore wind farms uses a nonlinear fluid dynamics model When, the iterative calculation should meet the convergence requirements.

4 Basic information

4.0.1 Small-scale numerical simulation of wind energy resources in offshore wind farms should collect on-site wind measurement data, Wind data should comply with the current national standard "Measurement Method for Wind Energy Resources in Wind Farms" GB/T 18709 And "Specifications for Wind Energy Resource Measurement and Ocean Hydrological Observation of Offshore Wind Farm Projects" NB/T 31029 Provisions. 4.0.2 The small-scale numerical simulation of wind energy resources of offshore wind farms should collect topographic maps. When there are land or islands within the boundary and within 10 km of its extension, the topographic map collection range should be It is included, and the scale should be 1.2 000 to 1.10 000. 4.0.3 Small-scale numerical simulation of wind energy resources of offshore wind farms Sea surface roughness data within 10 km of extension. 4.0.4 Small-scale numerical simulation of wind energy resources in offshore wind farms should collect two and Temperature data at the above level. 4.0.5 Small-scale numerical simulation of wind energy resources in offshore wind farms should mainly collect wind turbine hubs Dynamic power curve and thrust coefficient under height, impeller diameter, air density at hub height Curve data. 4.0.6 Small-scale numerical simulation of wind energy resources in offshore wind farms should mainly collect surrounding wind farms. The dynamic power curve under the position coordinates, the height of the hub, the diameter of the impeller, and the air density at the height of the hub Line and thrust coefficient curve data. 4.0.7 Small-scale numerical simulation of wind energy resources in offshore wind farms should be collected from surrounding weather stations for many years and months Average wind speed data and hourly wind speed and direction data over the same period of on-site wind measurement. 4.0.8 The small-scale numerical simulation of wind energy resources in offshore wind farms should collect data from the same period as the on-site wind measurement. No less than one full year of mesoscale data, the data should include wind speed, wind direction, temperature, gas For pressure data, the time interval should not be greater than 1 h, and the horizontal grid spacing should be 1 km～3 km.

5 Model and parameters

5.1 General provisions 5.1.1 Atmospheric stability should be set in the small-scale numerical simulation calculation of wind energy resources of offshore wind farms The degree of atmospheric stability should be classified based on the collected field data. 5.1.2 On-site wind measurement data processing should comply with the current national standard "Wind Energy Resource Assessment of Wind Farms" Method" GB/T 18710. 5.1.3 The small-scale numerical simulation calculation of wind energy resources of offshore wind farms should consider the surrounding wind farms. influences. 5.1.4 The small-scale numerical simulation calculation area of wind energy resources of offshore wind farms should be the wind farm boundary Extend the range not less than 5 km. 5.1.5 The small-scale numerical simulation calculation sectors of wind energy resources of offshore wind farms should not be less than 16 sectors. 5.2 Linear fluid dynamics model Finite element grid water in the small-scale numerical simulation calculation of wind energy resources of offshore wind farms The horizontal spacing should not be greater than 100 m. 5.3 Nonlinear fluid dynamics model 5.3.1 When there are land, islands, other wind farms, buildings (structures) near the target wind farm The small-scale numerical simulation of wind energy resources of offshore wind farms should be calculated in the corresponding direction. Extend the territory by 5 km. 5.3.2 Small-scale numerical simulation of wind energy resources in offshore wind farms The horizontal spacing should not be greater than 50 m, and the grid horizontal spacing in other areas should not be greater than.200 m; sea level In the vertical range from the surface to the tip of the impeller, the vertical grid spacing should not be greater than 15 m. The number of grid layers should not be less than 20. 5.3.3 The number of sectors for small-scale numerical simulation of wind energy resources of offshore wind farms should be calculated according to the corresponding The actual wind direction frequency distribution in the calculation area should be adjusted, and the dominant wind direction should be fanned. Zone encryption calculation. 5.3.4 Small-scale numerical simulation of wind energy resources in offshore wind farms It is advisable to carry out grid densification calculation at the locations of planned layout points, terrain and roughness mutation locations. 5.3.5 The small-scale numerical simulation calculation parameters of wind energy resources of offshore wind farms should be based on atmospheric stability Degree category to be set. 5.3.6 The small-scale numerical simulation of wind energy resources of offshore wind farms should be suitable for the atmospheric boundary layer. Turbulence model. 5.3.7 The turbulence results of the small-scale numerical simulation of wind energy resources in offshore wind farms should adopt field measurements. The wind data is corrected. 5.4 Wake model 5.4.1 The wake calculation of offshore wind farms should adopt a wake model that takes into account the superimposed effects of wakes. 5.4.2 Offshore wind farm wake attenuation should consider site roughness, atmospheric stability, and strong turbulence Degree and other factors.

6 Numerical simulation

6.0.1 The small-scale numerical simulation of wind energy resources of offshore wind farms should adopt the field in the calculation area. Wind data. 6.0.2 The distance to land, islands, other wind farms, buildings (structures) is within 20 km For offshore wind farms, small-scale numerical simulations of wind energy resources should adopt mesoscale data and small-scale Numerical simulation coupled calculation. 6.0.3 The mesoscale data used in the small-scale numerical simulation of wind energy resources of offshore wind farms shall conform to The following provisions. 1 Within the sweep range of the impeller of the wind turbine to be selected, the number of vertical grid layers of the mesoscale data is not It should be less than 5 layers. 2 The coverage of the mesoscale data should not be smaller than the small-scale numerical simulation calculation area.

3 The accuracy of the mesoscale wind speed and direction data should satisfy that the relative error of the annual average wind speed is not greater than

8%, the simulated dominant wind direction and sub-dominant wind direction are consistent with the actual measurement, and the wind direction frequency is absolutely deviated The difference is not more than 5%. 6.0.4 The wind energy resource coupling calculation of offshore wind farms should use mesoscale data as mesoscale grids The average results within the range are simulated on a small scale. 6.0.5 The coupling calculation of wind energy resources of offshore wind farms can use small-scale numerical simulation The mesoscale data is used as a virtual wind measurement tower for small-scale numerical simulation. 6.0.6 When there are on-site wind measurement data in the small-scale numerical simulation calculation area, offshore wind farms For wind energy resource coupling calculations, the on-site wind measurement data should be unified and revised into representative annual wind speed data. Then use the optimal interpolation method to correct the mesoscale data.

7 Simulation results and verification

7.0.1 The output of small-scale numerical simulation of wind energy resources of offshore wind farms should mainly include site Regional wind speed, wind direction frequency, Weib... ......

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