FLOATING WIND TURBINES
EXPERIENCE – FROM DEMO TO PILOT PARK
RISK ANALYSIS
With its Hywind Demo and Hywind Scotland, Statoil has pioneered floating offshore wind; and now, in partnership with Lloyd’s Register, the company has introduced the concept of total risk analysis to the offshore wind industry
OBJECTIVES
The objective of the risk analysis was to identify and characterise risks related to the offshore assets and quantify risk levels for personnel and assets. Where quantification was not possible due to insufficient data, a qualitative risk description was developed.
The objective of the emergency preparedness analysis was to establish defined situations of accidents and analyse performance requirements against anticipated emergency response arrangements.
The analysis was performed in accordance to proven risk analysis methodology and the risk tolerance criteria predefined by Statoil.
RISK ANALYSIS (TRA) PROCESS
>> Step 1 – systematic hazard identification. Result to be used as basis for barrier implementation
>> Step 2 – risk classification (frequency and consequence) of risks identified during step 1
>> Step 3 – risk picture in terms of risk matrix and risk indicators, qualitative and quantitative
The risk picture (below) was applied during the emergency preparedness assessment.
EMERGENCY PREPAREDNESS ANALYSIS (EPA) PROCESS >> Step 1 – establish defined situations (ten scenarios were established)
>> Step 2 – review response performance requirements according to LR’s EPA-methodology
>> Step 3 – establish the foundation for further development of emergency response plan taking the five phases of emergency response into consideration… 1. Alert 2. Combat 3. Rescue 4. Evacuation 5. Normalisation
OUTCOMES
The Hywind experience demonstrates that risk related to occupational hazard and marine operations (boatlanding and internal vessel traffic) are associated with the highest risks. However, Statoil has made significant progress, introducing new technology and developing O&M structures to mitigate identified risks.
FUTURE In the future, offshore wind turbines are expected to become even smarter, enabling O&M teams to further mitigate risks by managing technical issues remotely and, in doing so, reduce the need for personnel deployment offshore accordingly. Emergency response systems are the subject of similar development.
Arve Sandve Lloyd’s Register
Editor’s note: This article is an excerpt of findings presented at Offshore Wind Energy 2017
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