Real-time monitoring system for scour around monopile foundation of offshore wind turbine

This paper presents the numerical and experimental implementation of a 2 degrees-of-freedom (DoF) setup for simulating the surge and pitch motion of OC5 semi submersible floating offshore wind turbine, through the “hardware-in-the-loop” (HIL) approach during wind tunnel tests. This approach is hybrid since a real-time combination of computations and measurements are carried out during the experiments. This allows to separate the model tests of floating wind turbines into wave/ocean basin and wind tunnel tests, as it is currently done within the H2020/LIFES50+ project respectively at Marintek (Norway) and Politecnico di Milano (Italy), with the possibility of exploiting the advantages of each facility and overcoming the scaling issues and conflicts (e.g. Froude-Reynolds) that are emphasized when it comes to testing both wind and wave in a single test facility. In this paper the modelling approach and experimental implementation are presented, with a special focus on signals and data handling in the real-time HIL control system aimed at minimizing the effect of model/full scale discrepancies. Results are shown for free decays, regular and irregular sea states, showing promising results for the next 6-DoF system being finalized.

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Control of offshore wind turbine simulators for real time using layering models

2009 World Non-Grid-Connected Wind Power and Energy Conference ◽

10.1109/wnwec.2009.5335758 ◽

2009 ◽

Cited By ~ 1

Author(s):

Chuang Liu ◽

Zhibin Ling ◽

Xu Cai

Keyword(s):

Wind Turbine ◽

Real Time ◽

Offshore Wind ◽

Offshore Wind Turbine

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Simplified Floating Wind Turbine for Real-Time Simulation of Large-Scale Floating Offshore Wind Farms

Energies ◽

10.3390/en14154571 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4571

Author(s):

Thanh-Dam Pham ◽

Minh-Chau Dinh ◽

Hak-Man Kim ◽

Thai-Thanh Nguyen

Keyword(s):

Wind Turbine ◽

Real Time ◽

Large Scale ◽

Wind Farms ◽

Offshore Wind ◽

Offshore Wind Turbine ◽

Offshore Wind Farms ◽

Real Time Simulation ◽

The Real ◽

Time Simulation

Floating offshore wind has received more attention due to its advantage of access to incredible wind resources over deep waters. Modeling of floating offshore wind farms is essential to evaluate their impacts on the electric power system, in which the floating offshore wind turbine should be adequately modeled for real-time simulation studies. This study proposes a simplified floating offshore wind turbine model, which is applicable for the real-time simulation of large-scale floating offshore wind farms. Two types of floating wind turbines are evaluated in this paper: the semi-submersible and spar-buoy floating wind turbines. The effectiveness of the simplified turbine models is shown by a comparison study with the detailed FAST (Fatigue, Aerodynamics, Structures, and Turbulence) floating turbine model. A large-scale floating offshore wind farm including eighty units of simplified turbines is tested in parallel simulation and real-time software (OPAL-RT). The wake effects among turbines and the effect of wind speeds on ocean waves are also taken into account in the modeling of offshore wind farms. Validation results show sufficient accuracy of the simplified models compared to detailed FAST models. The real-time results of offshore wind farms show the feasibility of the proposed turbine models for the real-time model of large-scale offshore wind farms.

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