Blar i SINTEF Open på forfatter "Merz, Karl Otto"
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A linear State-Space Model of an Offshore Wind Turbine, Implemented in the STAS Wind Power Plant Analysis Program
Merz, Karl Otto (SINTEF Energi. Rapport;TR A7474, Research report, 2015)A set of MATlab/Octave scripts have been developed, which output state matrices describing the linearized aerolastic dynamics of an offshore wind turbine. The aerodynamic model is based on momentum balance,and includes ... -
An Electromechanical Model of the TotalControl Reference Wind Power Plant
Merz, Karl Otto; Kölle, Konstanze; Holdyk, Andrzej (SINTEF Rapport;, Research report, 2019)An electromechanical model of the TotalControl Reference Wind Power Plant has been built. This is based on SINTEF's STAS software, for the system dynamics and control of wind power plants. An overview is given of the theory ... -
Basic controller tuning for large offshore wind turbines
Merz, Karl Otto (Journal article; Peer reviewed, 2016)Wind turbines are controlled through the electrical torque on the generator and the pitch of the blades. The tuning of the controller determines the dynamics of the system, which can then be good (smooth yet responsive) ... -
Control system for start-up and shut-down of a floating vertical axis wind turbine
Svendsen, Harald Georg; Merz, Karl Otto (Peer reviewed; Journal article, 2013)A baseline control system for the Deepwind floating vertical axis wind turbine (VAWT) concept is analysed with em- phasis on start-up and shut-down schemes. The turbine concept includes a rotating spar with a 2-bladed rotor ... -
Development of an LQR framework for rapid prototyping of offshore wind turbine controllers, with application to active load
Merz, Karl Otto (SINTEF Rapport;, Research report, 2020)A linear quadradic regulator (LQR) framework has been developed for rapid prototyping of offshore wind turbine controllers. This enables the study of tradeoffs between conflicting control objectives, such as maximizing ... -
An engineering model for dynamic wind power plant flow
Merz, Karl Otto (Peer reviewed; Journal article, 2017)An engineering method is developed for the prediction of dynamic flow through a wind power plant, in the presence of turbine control actions. The model is composed of a simplified steady-state boundary layer model of ... -
A hierarchical supervisory wind power plant controller
Merz, Karl Otto; Chabaud, Valentin Bruno; Garcia-Rosa, Paula; Kölle, Konstanze (Peer reviewed; Journal article, 2021) -
A Hierarchical Wind Power Plant Supervisory Controller
Merz, Karl Otto; Kölle, Konstanze; Garcia Rosa, Paula Bastos; Chabaud, Valentin Bruno (SINTEF Rapport;, Research report, 2020) -
Influence of technical limitations and operation on sizing of an offshore energy storage connected to an offshore wind farm
Spro, Ole Christian; Mo, Olve; Merz, Karl Otto; Tande, John Olav Giæver (Journal article; Peer reviewed, 2015) -
Mitigating Turbine Mechanical Loads Using Engineering Model Predictive Wind Farm Controller
Kazda, J; Merz, Karl Otto; Tande, John Olav Giæver; Cutululis, Nicolaos Antonio (Journal article; Peer reviewed, 2018)Cumulative O&M costs of offshore wind farms can amount to 38% of lifetime costs. In wind farms, upstream turbine wakes can result in up to 80% higher fatigue loads at downstream wind turbines. The present work therefore ... -
Mooring Analysis of a Dual-Spar Floating Wind Farm With a Shared Line
Liang, Guodong; Jiang, Zhiyu; Merz, Karl Otto (Peer reviewed; Journal article, 2021)Wind farms with shared mooring lines have the potential to reduce mooring costs. However, such wind farms may encounter complex system dynamics because adjacent wind turbines are coupled. This paper presents an analysis ... -
Multidisciplinary design analysis and optimisation of a reference offshore wind plant
Perez-Moreno, S. Sanchez; Dykes, K.; Merz, Karl Otto; Zaaijer, M.B. (Journal article; Peer reviewed, 2018)Motivated by the need to develop reference wind energy systems for optimisation and technology assessment studies, the International Energy Agency Wind Task 37 on Wind Energy Systems Engineering is developing a reference ... -
Roadmap to the multidisciplinary design analysis and optimisation of wind energy systems
Perez-Moreno, S. Sanchez; Zaaijer, M.B.; Bottasso, C.L.; Dykes, K.; Merz, Karl Otto; Réthoré, P-E; Zahle, F. (Journal article; Peer reviewed, 2016)A research agenda is described to further encourage the application of Multidisciplinary Design Analysis and Optimisation (MDAO) methodologies to wind energy systems. As a group of researchers closely collaborating within ... -
STAS Aeroelastic 1.0 - Theory Manual
Merz, Karl Otto (SINTEF Rapport;, Research report, 2018) -
Towards a particle-flow framework for uncertainty quantification, with applications in wind plant system dynamics and control
Merz, Karl Otto (Peer reviewed; Journal article, 2022)The method of particle flow, originally developed for solving Bayes' formula, is extended to provide a general transformation between two probability distributions. It is shown that this can enable the use of a chaos ... -
Viper: A Tool for Computing Energy Production of Large Offshore Wind Farms
Merz, Karl Otto (SINTEF Energi. Rapport;, Research report, 2014)Viper (Vindpark Energiproduksjon) is a collection of Matlab scripts for computing the annual energy production of large offshore wind farms. The analysis method is based on the numerical finite-difference solution of the ... -
Wind farm control - Part I: A review on control system concepts and structures
Andersson, Leif Erik; Anaya-Lara, Olimpo; Tande, John Olav Giæver; Merz, Karl Otto; Imsland, Lars Struen (Peer reviewed; Journal article, 2021)Wind farm control design is a recently new area of research that has rapidly become a key enabler for the development of large wind farm projects and their safe and efficient connection to the power grid. A comprehensive ...