Reliability Analysis and Operation and Maintenance Strategies of Offshore Wind Turbine

The renewables sector and particularly offshore wind energy is a fast developing industry over the last few years. Especially, activities related to the installation, and operation and maintenance of offshore wind turbines become a challenging task with inherent risks. This article assesses the risks related to the above stages of a wind farm lifecycle using the failure mode, effects and criticality analysis and hazard identification methods. All works, from installation to operation and maintenance, are considered together with the wind turbine main components. An integrated risk analysis methodology is presented addressing personnel Safety (S), Environmental impact (E), Asset integrity (A), and Operation (O). The above is supplemented by a cost analysis with the aid of Bayesian belief networks method to assist the decision-making process related to installation, and operation and maintenance tasks. All major risks and critical wind turbine components are identified as well as measures are suggested to prevent or mitigate them. Moreover, inspection and maintenance plans are elaborated in general for the mentioned activities.

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An opportunistic maintenance strategy for offshore wind turbine based on accessibility evaluation

Wind Engineering ◽

10.1177/0309524x19852351 ◽

2019 ◽

Vol 44 (5) ◽

pp. 455-468

Author(s):

Xie Lubing ◽

Rui Xiaoming ◽

Li Shuai ◽

Hu Xin

Keyword(s):

Wind Turbine ◽

Preventive Maintenance ◽

Wind Farm ◽

Weather Conditions ◽

Offshore Wind ◽

Offshore Wind Turbine ◽

Maintenance Strategy ◽

Offshore Wind Farm ◽

Opportunistic Maintenance ◽

Operation And Maintenance

The maintenance costs of offshore wind turbines operated under the irregular, non-stationary conditions limit the development of offshore wind power industry. Unlike onshore wind farms, the weather conditions (wind and waves) have greater impacts on the operation and maintenance of offshore wind farm. Accessibility is a key factor related to the operation and maintenance of offshore wind turbine. Considering the impact of weather conditions on the maintenance activities, the Markov method and dynamic time window are applied to represent the weather conditions, and an index used to evaluate the maintenance accessibility is then proposed. As the wind turbine is a multi-component complex system, this article uses the opportunistic maintenance strategy to optimize the preventive maintenance age and opportunistic maintenance age for the main components of the wind turbine. Taking the minimum expectation cost as objective function, this strategy integrates the maintenance work of the key components. Finally, an offshore wind farm is taken for simulation case study of this strategy; the results showed that the maintenance cost of opportunistic maintenance strategy is 10% lower than that of the preventive maintenance strategy, verifying the effectiveness of the opportunistic maintenance.

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On risk-based operation and maintenance of offshore wind turbine components

Reliability Engineering & System Safety ◽

10.1016/j.ress.2010.07.007 ◽

2011 ◽

Vol 96 (1) ◽

pp. 218-229 ◽

Cited By ~ 116

Author(s):

Jannie Jessen Nielsen ◽

John Dalsgaard Sørensen

Keyword(s):

Wind Turbine ◽

Offshore Wind ◽

Offshore Wind Turbine ◽

Operation And Maintenance

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