Control Strategies for Floating Offshore Wind Turbine: Challenges and Trends

Salic, Tom; Charpentier, Jean-Frédéric; Benbouzid, Mohamed; Boulluec, Marc Le

doi:10.3390/electronics8101185

Cited by 43 publications

(21 citation statements)

References 36 publications

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“…Thus, it is conventionally required that the extreme response of building structures be restricted within an acceptable level [31,32]. Otherwise, associated measures should be implemented for vibration reduction and control of the dynamic systems [33][34][35][36].…”

Section: Estimation Of Structural Extreme Responsementioning

confidence: 99%

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

et al. 2020

Applied Sciences

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Typhoon Mangkhut (1822) was one of the strongest tropical cyclones that ever impacted the south coast of China in past decades. During the passage of this typhoon, the structural health monitoring (SHM) system installed on a 303 m high building in this region worked effectively, and high-quality field measurements at nine height levels of the building were collected successfully, which provides a valuable opportunity to explore the dynamic properties of the building and the associated wind effects. In this study, the typhoon wind characteristics are presented first based on in-situ measurements at two sites. Acceleration responses of the building is then investigated, and the building’s serviceability is assessed against several comfort criteria. This study further focuses on the identification of modal parameters (i.e., natural frequency, damping ratio, and modal shape) via two methods: stochastic subspace identification (SSI) method and a method based on combined use of spectral analysis and random decrement technique (RDT). The good agreement between the two results demonstrates the effectiveness and the accuracy of the adopted methods. The obtained results are further compared with the stipulations in several technical codes as well as simulation results via finite element method to examine their performances in this real case. The amplitude dependence of natural frequencies and damping ratios of the studied building are also stressed.

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Section: Estimation Of Structural Extreme Responsementioning

confidence: 99%

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

et al. 2020

Applied Sciences

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“…Simulation of external forces is an essential stage of reliability-based controller design ( Salic et al, 2019 ). In a reliability-based controller design, a controller is designed by minimising the probability of violating the failure threshold through solving a reliability-based multi-objective optimisation problem ( Crespo and Kenny, 2005 ).…”

Section: Reliability Analysis Of the Integrated Systemmentioning

confidence: 99%

Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia

Aryai

Abdussamie

Salehi

et al. 2021

Process Safety and Environmental Protection

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Sustainable use of the ocean for food and energy production is an emerging area of research in different countries around the world. This goal is pursued by the Australian aquaculture, offshore engineering and renewable energy industries, research organisations and the government through the “Blue Economy Cooperative Research Centre”. To address the challenges of offshore food and energy production, leveraging the benefits of co-location, vertical integration, infrastructure and shared services, will be enabled through the development of novel Multi-Purpose Offshore-Platforms (MPOP). The structural integrity of the designed systems when being deployed in the harsh offshore environment is one of the main challenges in developing the MPOPs. Employing structural reliability analysis methods for assessing the structural safety of the novel aquaculture-MPOPs comes with different limitations. This review aims at shedding light on these limitations and discusses the current status and future directions for structural reliability analysis of a novel aquaculture-MPOP considering Australia’s unique environment. To achieve this aim, challenges which exist at different stages of reliability assessment, from data collection and uncertainty quantification to load and structural modelling and reliability analysis implementation, are discussed. Furthermore, several solutions to these challenges are proposed based on the existing knowledge in other sectors, and particularly from the offshore oil and gas industry. Based on the identified gaps in the review process, potential areas for future research are introduced to enable a safer and more reliable operation of the MPOPs.

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“…Due to the relatively fast development the offshore wind industry has experienced in recent years, moving from 3-4 GW figures early in the 21st century to contemporary figures of about 12 GW, and bearing in mind the market forecast reaching up to levels of 40-50 GW by 2020 as per information published by the Carbon Trust organization on their webpage, it is logical that the offshore industry would have to study new alternatives for future projects, which it will be necessary to instal far from currently near-shore layout projects (<50 km) once these scenarios are exhausted [75][76][77]. To make floating structures a reality, several aspects, both cost-competitiveness and technical reliability, must be overcome [78].…”

Section: Floating Structuresmentioning

confidence: 99%

Wind Turbines Offshore Foundations and Connections to Grid

et al. 2020

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Most offshore wind farms built thus far are based on waters below 30 m deep, either using big diameter steel monopiles or a gravity base. Now, offshore windfarms are starting to be installed in deeper waters and the use of these structures—used for oil and gas like jackets and tripods—is becoming more competitive. Setting aside these calls for direct or fixed foundations, and thinking of water depths beyond 50 m, there is a completely new line of investigation focused on the usage of floating structures; TLP (tension leg platform), Spar (large deep craft cylindrical floating caisson), and semisubmersible are the most studied. We analyze these in detail at the end of this document. Nevertheless, it is foreseen that we must still wait sometime before these solutions, based on floating structures, can become truth from a commercial point of view, due to the higher cost, rather than direct or fixed foundations. In addition, it is more likely that some technical modifications in the wind turbines will have to be implemented to improve their function. Regarding wind farm connections to grid, it can be found from traditional designs such as radial, star or ring. On the other hand, for wind generator modeling, classifications can be established, modeling the wind turbine and modeling the wind farm. Finally, for the wind generator control, the main strategies are: passive stall, active stall, and pitch control; and when it is based on wind generation zone: fixed speed and variable speed. Lastly, the trend is to use strategies based on synchronous machines, as the permanent magnet synchronous generator (PMSG) and the wound rotor synchronous generator (WRSG).

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Control Strategies for Floating Offshore Wind Turbine: Challenges and Trends

Cited by 43 publications

References 36 publications

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

Structural Responses of a Supertall Building Subjected to a Severe Typhoon at Landfall

Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia

Wind Turbines Offshore Foundations and Connections to Grid

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