IEC TR 61400-12-4:2020 PDF

Name: IEC TR 61400-12-4:2020 — Wind energy generation systems - Part 12-4: Numerical site calibration for power performance testing of wind turbines
SKU: IEC TR 61400-12-4:2020
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Wind energy generation systems - Part 12-4: Numerical site calibration for power performance testing of wind turbines

Название (английский):

IEC TR 61400-12-4:2020

Wind energy generation systems - Part 12-4: Numerical site calibration for power performance testing of wind turbines

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 28
Дата публикации:: 22 сентября 2020 г.
Издание:: IEC TR 61400 edition 1 version 1
ICS:: 01

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Описание (английский):

IEC TR 61400-12-4:2020 summarizes the current state of the art in numerical flow modelling, existing guidelines and past benchmarking experience in numerical model validation and verification. Based on the work undertaken, the document identifies the important technical aspects for using flow simulation over terrain for wind application as well as the existing open issues including recommendations for further validation through benchmarking tests.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты IEC

Overview

IEC TR 61400-12-4:2020 is an IEC Technical Report that summarizes the state of the art for using numerical flow simulation as a method of numerical site calibration (NSC) for wind turbine power performance testing. Rather than prescribing a normative method, the report reviews numerical modelling approaches, existing verification and validation guidelines, and past benchmarking campaigns. It identifies key technical aspects for applying flow simulation over terrain to derive flow correction factors (FCFs) and documents open issues and recommendations for further validation and uncertainty quantification.

Key topics and technical requirements

Numerical modelling approaches: overview of linear flow models, RANS (Reynolds-averaged Navier–Stokes), and LES / hybrid RANS–LES methods, with discussion of their applicability to wind energy flows.

Guidelines and standards for V&V: summaries of existing guidance such as AIAA verification/validation guides, ASME V&V 20, COST Action 732, AIJ and VDI guidance, IEA Task 31, and MEASNET practices.

Benchmarking and validation tests: review of intercomparisons and experiments (e.g., DEWI round robin, Bolund, New European Wind Atlas campaigns like Perdigão, Alaiz, Østerild, Kassel, and Wakebench) used to evaluate microscale models.

Important modelling inputs and setup issues:

Quality of topographical and roughness input data
Computational domain size and boundary conditions
Mesh resolution and convergence criteria
Representation of atmospheric stability, Coriolis effects, and obstacles
Suggested applicability ranges for different model classes for NSC

Open issues and recommendations:

How to derive FCFs robustly from simulation outputs for power curve corrections
Handling directional bin transitions and seasonal variability
Uncertainty quantification and the need for further benchmarking validation campaigns

Practical applications and who uses this standard

Wind farm developers and site assessors: to evaluate whether NSC can replace or complement traditional mast-based site calibration, potentially reducing cost and lead time.

Turbine manufacturers and performance engineers: for assessing turbine power performance under complex terrain or heterogeneous roughness.

CFD practitioners and modelers: for guidance on best practices, model selection (RANS vs LES), input data needs, and validation expectations.

Certification bodies and test houses: to understand the current capabilities and limitations of NSC when reviewing power performance measurements.

Researchers and standards committees: to identify research gaps (uncertainty quantification, benchmarking) and priorities for future standardization.

Related standards and keywords

Related documents: IEC 61400-12-1 (power performance measurement standard), ASME V&V 20, AIAA V&V guides, MEASNET protocols, IEA Task 31 outputs.

SEO keywords: IEC TR 61400-12-4, numerical site calibration, NSC, flow correction factors, power performance testing, wind turbine site calibration, CFD for wind energy, RANS, LES, benchmarking, uncertainty quantification.

IEC TR 61400-12-4:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and who uses this standard

Related standards and keywords

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