The offshore access problem and turbine availability: probabilistic modelling of expected delays to repairs

Research output: Contribution to conferencePaper

Abstract

Difficulty of access due to adverse sea-state can cause significant delays to operation and maintenance on offshore wind farms, resulting in lost energy production and increased cost of energy. This paper presents a method of expressing such delays in closed form, in terms of a probabilistic event tree and Weibull parameters of the ‘storm’ and ‘calm’ duration distributions.
Coupled with turbine subsystem reliability statistics and threshold sea states for access, annual expected delays and turbine availability can be estimated using a simple spreadsheet, without lengthy Monte Carlo simulations, as well as their sensitivities to site, turbine and access parameters.

Conference

ConferenceEuropean Offshore Wind Conference 2009
CountrySweden
CityStockholm
Period14/09/0916/09/09

Fingerprint

Turbines
Repair
Availability
Offshore wind farms
Spreadsheets
Statistics
Costs
Monte Carlo simulation

Keywords

  • offshore maintenance
  • access delay
  • sea state

Cite this

@conference{054f44b78b0349bb8fcd9d3f9a9e788b,
title = "The offshore access problem and turbine availability: probabilistic modelling of expected delays to repairs",
abstract = "Difficulty of access due to adverse sea-state can cause significant delays to operation and maintenance on offshore wind farms, resulting in lost energy production and increased cost of energy. This paper presents a method of expressing such delays in closed form, in terms of a probabilistic event tree and Weibull parameters of the ‘storm’ and ‘calm’ duration distributions.Coupled with turbine subsystem reliability statistics and threshold sea states for access, annual expected delays and turbine availability can be estimated using a simple spreadsheet, without lengthy Monte Carlo simulations, as well as their sensitivities to site, turbine and access parameters.",
keywords = "offshore maintenance, access delay, sea state",
author = "Julian Feuchtwang and David Infield",
year = "2009",
month = "9",
language = "English",
note = "European Offshore Wind Conference 2009 ; Conference date: 14-09-2009 Through 16-09-2009",

}

Feuchtwang, J & Infield, D 2009, 'The offshore access problem and turbine availability: probabilistic modelling of expected delays to repairs' Paper presented at European Offshore Wind Conference 2009, Stockholm, Sweden, 14/09/09 - 16/09/09, .

The offshore access problem and turbine availability : probabilistic modelling of expected delays to repairs. / Feuchtwang, Julian; Infield, David.

2009. Paper presented at European Offshore Wind Conference 2009, Stockholm, Sweden.

Research output: Contribution to conferencePaper

TY - CONF

T1 - The offshore access problem and turbine availability

T2 - probabilistic modelling of expected delays to repairs

AU - Feuchtwang, Julian

AU - Infield, David

PY - 2009/9

Y1 - 2009/9

N2 - Difficulty of access due to adverse sea-state can cause significant delays to operation and maintenance on offshore wind farms, resulting in lost energy production and increased cost of energy. This paper presents a method of expressing such delays in closed form, in terms of a probabilistic event tree and Weibull parameters of the ‘storm’ and ‘calm’ duration distributions.Coupled with turbine subsystem reliability statistics and threshold sea states for access, annual expected delays and turbine availability can be estimated using a simple spreadsheet, without lengthy Monte Carlo simulations, as well as their sensitivities to site, turbine and access parameters.

AB - Difficulty of access due to adverse sea-state can cause significant delays to operation and maintenance on offshore wind farms, resulting in lost energy production and increased cost of energy. This paper presents a method of expressing such delays in closed form, in terms of a probabilistic event tree and Weibull parameters of the ‘storm’ and ‘calm’ duration distributions.Coupled with turbine subsystem reliability statistics and threshold sea states for access, annual expected delays and turbine availability can be estimated using a simple spreadsheet, without lengthy Monte Carlo simulations, as well as their sensitivities to site, turbine and access parameters.

KW - offshore maintenance

KW - access delay

KW - sea state

UR - http://proceedings.ewea.org/offshore2009/proceedings/statscounter.php?id=5&IDABSTRACT=217

UR - http://proceedings.ewea.org/offshore2009/proceedings/statscounter.php?id=2&IDABSTRACT=217

M3 - Paper

ER -

Feuchtwang J, Infield D. The offshore access problem and turbine availability: probabilistic modelling of expected delays to repairs. 2009. Paper presented at European Offshore Wind Conference 2009, Stockholm, Sweden.