Conference programme

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Friday, 20 November 2015
09:30 - 11:00 Innovative design and validation tools
Turbine technology  
Onshore      Offshore    


Room: Montmartre

Guidelines to optimize design processes in terms of cost and time-to-market while ensuring necessary standards when variants are introduced, during early stages of new concepts and as the industry moves to larger turbines.

  • Progress on smart rotor control using sensing strategies for optimal design
  • Probabilistic design framework to quantify uncertainties and reduce risk in design
  • New approach to validation of simulation models for grid studies to deliver variants earlier and economically
  • Time benefits through novel dual axis fatigue testing of blades

Learning objectives

  • Delegates will take away guidelines for the optimal design of smart rotor systems
  • Delegates will be able to implement a probabilistic design method enabling assessment of which uncertainties have most influence on overall COE
  • Delegates will be able to propose a feasible alternative to traditional validation with field measurement data
  • Delegates will be able  to advocate optimized dual axis fatigue testing of blades
Lead Session Chair:
Michaela O'Donohoe, Adwen, Spain
Peter Jamieson, University of Strathclyde, United Kingdom
Simon Pansart DNV GL Renewables Certification, Germany
Co-authors:
Simon Pansart (1) F
(1) DNV GL Renewables Certification, Hamburg, Germany

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Presenter's biography

Biographies are supplied directly by presenters at EWEA 2015 and are published here unedited

Mr. Pansart has been working since 2002 as a structural engineer in the aerospace and wind energy industry. He is currently heading the rotor blades section of DNV GL Renewables Certification in Hamburg and Copenhagen. After his studies of mechanical engineering in Braunschweig (Germany) and Waterloo (Canada), he spent seven years with Airbus and the German Aerospace Center (DLR) in Toulouse and Bremen, engineering metallic and composite airframe structures in various roles, before joining DNV GL in 2010 as a rotor blade certification engineer. He has received a PhD for his work on compressive failure of carbon fibre composites.

Abstract

A new rotor blade standard for high product quality and flexible certification

Introduction

DNV GL Renewables Certification, a certification body for wind turbines, is currently developing a completely new standard for wind turbine rotor blades which is expected to be published end of 2015. The presentation will give a technical overview of this new standard, which is expected to become one of the most relevant rotor blade standards for wind turbine designers, manufacturers, and operators worldwide.

Approach

Today, several alternative standards and guidelines are used as a technical basis for certification, in connection with various certification schemes. With the new DNV GL rotor blade standard, an attempt is made to integrate and further develop the technical requirements coming from existing standards and from standards currently under development (such as the GL2010 and GL2012 wind turbine guidelines by Germanischer Lloyd, the DNV-J102 rotor blade standard by Det Norske Veritas, or the IEC 61400-5 rotor blade standard). At the same time, the new standard is intended to push innovation and improve overall production reliability, by implementing newly formulated requirements for more advanced design methods, putting a higher emphasis on manufacturing quality, and providing more flexible approaches to structural testing.

Main body of abstract

The innovations and new approaches proposed in the new DNV GL rotor blade standard are based on experience and feedback collected from designers, manufacturers, and operators over the last years, thus responding to the needs the rotor blade industry has voiced:
* Higher accuracy of design methods: Design requirements are modernized and re-formulated to encourage the application of more accurate and more sophisticated methodologies for structural design verification.
* Materials and manufacturing quality: The new standard will require in more detail that materials and manufacturing processes are thoroughly specified and adequately qualified, with the objective of a more reliable production and a reproducible product quality. In the same context, incentives are created for better process control and more rigorous consideration of manufacturing effects (i.e. tolerances and defects) in the design phase.
* Sub-component testing: For the first time in the industry, the new standard provides a framework for making sub-component testing an integral part of a certification process. This includes provisions for integrating such testing into the design verification and linking it up with full scale blade testing, as well as requirements for test loads and reduction factors.
* Flexible full-scale fatigue testing: More specifically than in existing standards, requirements for full scale blade testing allow for a reduced testing scope for similar blades, partial testing, or accelerated test campaigns, thus adding flexibility to the certification process.
* Repair: Requirements for designing and realizing structural repairs are proposed, both for repairs in the manufacturing workshop and for repairs on blades in operation.


Conclusion

In summary, a new standard is proposed which incentivizes overall improvement of product quality and reliability, by formulating innovative requirements for design, manufacturing, testing and repair of rotor blades.


Learning objectives
Delegates who attend this presentation will get insight into the details of this new proposal, and hopefully obtain some ideas on how to make use of the new, innovative possibilities the DNV GL rotor blade standard may offer for their blade development projects. Ideally, this will contribute to the ongoing dialogue between industry and certification bodies which is needed to continuously align new standards with industry needs.