A comparative safety assessment for direct current and direct current with hybrid supply power systems in a windfarm service operation vessel using system- theoretic process analysis
Bolbot, Victor and Puisa, Romanas and Theotokatos, Gerasimos and Boulougouris, Evangelos and Vassalos, Dracos (2019) A comparative safety assessment for direct current and direct current with hybrid supply power systems in a windfarm service operation vessel using system- theoretic process analysis. In: European STAMP Workshop & Conference, 2019-09-18 - 2019-09-20.
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Abstract
As windfarms are moving further offshore, their maintenance has to be supported by the new generation Service Operation Vessels (SOV) with Dynamic Positioning capabilities. For the SOV safe operations it is crucial that any hazardous scenario is properly controlled. Whilst international regulations require the implementation of Failure Modes and Effects Analysis (FMEA) for SOV power systems, FMEA has been criticised for not addressing properly failures in control systems. In this study, System-Theoretic Process Analysis (STPA) is employed for identifying the hazardous scenarios in terms of Unsafe Control Actions (UCAs) in Direct Current (DC) and DC with batteries power systems. Then the identified UCAs are ranked based on their risk. The results demonstrate that the number of hazardous scenarios derived by the STPA increases in a power system with batteries in comparison to a conventional DC power system, thus depicting higher complexity of this system. However, the increase in overall risk is small and within acceptable limits, whilst the risk reduces for a number of UCAs leading to Diesel Generator overload sub-hazard.
ORCID iDs
Bolbot, Victor ORCID: https://orcid.org/0000-0002-1883-3604, Puisa, Romanas, Theotokatos, Gerasimos ORCID: https://orcid.org/0000-0003-3547-8867, Boulougouris, Evangelos ORCID: https://orcid.org/0000-0001-5730-007X and Vassalos, Dracos ORCID: https://orcid.org/0000-0002-0929-6173;-
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Item type: Conference or Workshop Item(Paper) ID code: 69999 Dates: DateEvent18 September 2019Published2 September 2019AcceptedSubjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering Department: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering Depositing user: Pure Administrator Date deposited: 01 Oct 2019 11:41 Last modified: 07 Oct 2024 00:29 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/69999