Measurement of the underwater noise levels generated from marine piling associated with the installation of offshore wind turbines.

2011 ◽  
Vol 129 (4) ◽  
pp. 2461-2461
Author(s):  
Pete D. Theobald ◽  
Stephen P. Robinson ◽  
Michael A. Ainslie ◽  
Christ A. F. de Jong ◽  
Paul A. Lepper
Keyword(s):  
Wind Turbines ◽  
Offshore Wind ◽  
Underwater Noise ◽  
Noise Levels ◽  
Offshore Wind Turbines

Noise impact assessment of onshore and offshore wind turbine

2021 ◽  
Vol 263 (1) ◽  
pp. 5443-5445
Author(s):  
Hyosung Sun
Keyword(s):  
Wind Turbines ◽  
Assessment Method ◽  
Energy Development ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Underwater Noise ◽  
Noise Effect ◽  
Offshore Wind Turbines ◽  
Marine Life ◽  
Renewable Energy Development

Because of climate change and environmentally friendly energy policy in Korea, the demand for a new renewable energy development has been increased. Especially, the onshore and offshore wind turbines have played an important role in the power system for generating eco friendly energy. However, in the stage of constructing and operating the onshore and offshore wind turbines, the aerodynamic and underwater noise effect on human and marine life becomes a prominent figure on a social issue, and it is necessary to prepare the assessment method of these noise impacts in order to prevent the influences on human and marine life in advance. Therefore, this paper is focused on suggesting the evaluation plans of the noise effect from the onshore and offshore wind turbines.

scholarly journals How loud is the underwater noise from operating offshore wind turbines?

2020 ◽  
Vol 148 (5) ◽  
pp. 2885-2893
Author(s):  
Jakob Tougaard ◽  
Line Hermannsen ◽  
Peter T. Madsen
Keyword(s):  
Wind Turbines ◽  
Offshore Wind ◽  
Underwater Noise ◽  
Offshore Wind Turbines

Pitch Angle Control of Floating Offshore Wind Turbines by H∞ Control

2014 ◽  
Vol 134 (8) ◽  
pp. 1096-1103 ◽  
Author(s):  
Sho Tsujimoto ◽  
Ségolène Dessort ◽  
Naoyuki Hara ◽  
Keiji Konishi
Keyword(s):  
Wind Turbines ◽  
Pitch Angle ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines

scholarly journals Maintenance Planning of Offshore Wind Turbine Using Condition Monitoring Information

2009 ◽  
Author(s):  
Jose´ G. Rangel-Rami´rez ◽  
John D. So̸rensen
Keyword(s):  
Condition Monitoring ◽  
Wind Turbines ◽  
Wind Farm ◽  
Offshore Structures ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Maintenance Planning ◽  
Offshore Wind Turbines ◽  
Inspection And Maintenance ◽  
Monitoring Information

Deterioration processes such as fatigue and corrosion are typically affecting offshore structures. To “control” this deterioration, inspection and maintenance activities are developed. Probabilistic methodologies represent an important tool to identify the suitable strategy to inspect and control the deterioration in structures such as offshore wind turbines (OWT). Besides these methods, the integration of condition monitoring information (CMI) can optimize the mitigation activities as an updating tool. In this paper, a framework for risk-based inspection and maintenance planning (RBI) is applied for OWT incorporating CMI, addressing this analysis to fatigue prone details in welded steel joints at jacket or tripod steel support structures for offshore wind turbines. The increase of turbulence in wind farms is taken into account by using a code-based turbulence model. Further, additional modes t integrate CMI in the RBI approach for optimal planning of inspection and maintenance. As part of the results, the life cycle reliabilities and inspection times are calculated, showing that earlier inspections are needed at in-wind farm sites. This is expected due to the wake turbulence increasing the wind load. With the integration of CMI by means Bayesian inference, a slightly change of first inspection times are coming up, influenced by the reduction of the uncertainty and harsher or milder external agents.

scholarly journals Improving the Strategy of Maintaining Offshore Wind Turbines through Petri Net Modelling

2021 ◽  
Vol 11 (2) ◽  
pp. 574
Author(s):  
Rundong Yan ◽  
Sarah Dunnett
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Petri Net ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Maintenance Costs ◽  
Offshore Wind Turbines ◽  
Major Repair ◽  
Wind Turbine System ◽  
Periodic Maintenance

In order to improve the operation and maintenance (O&M) of offshore wind turbines, a new Petri net (PN)-based offshore wind turbine maintenance model is developed in this paper to simulate the O&M activities in an offshore wind farm. With the aid of the PN model developed, three new potential wind turbine maintenance strategies are studied. They are (1) carrying out periodic maintenance of the wind turbine components at different frequencies according to their specific reliability features; (2) conducting a full inspection of the entire wind turbine system following a major repair; and (3) equipping the wind turbine with a condition monitoring system (CMS) that has powerful fault detection capability. From the research results, it is found that periodic maintenance is essential, but in order to ensure that the turbine is operated economically, this maintenance needs to be carried out at an optimal frequency. Conducting a full inspection of the entire wind turbine system following a major repair enables efficient utilisation of the maintenance resources. If periodic maintenance is performed infrequently, this measure leads to less unexpected shutdowns, lower downtime, and lower maintenance costs. It has been shown that to install the wind turbine with a CMS is helpful to relieve the burden of periodic maintenance. Moreover, the higher the quality of the CMS, the more the downtime and maintenance costs can be reduced. However, the cost of the CMS needs to be considered, as a high cost may make the operation of the offshore wind turbine uneconomical.

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