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| 2. |
- Hassel, Henrik, et al.
(författare)
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Identifying critical components in technical infrastructure networks
- 2008
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Ingår i: Proceedings of the Institution of Mechanical Engineers. Part O: Journal of Risk and Reliability. - 1748-006X. ; 222:2, s. 235-243
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Tidskriftsartikel (refereegranskat)abstract
- A new method for identifying and ranking critical components and sets of components in technical infrastructures is presented. The criticality of a component or a set of components is defined as the vulnerability of the system to failure in a specific component, or set of components. The identification of critical components is increasingly difficult when considering multiple simultaneous failures. This is especially difficult when dealing with failures of multiple components with synergistic consequences, i.e. consequences that cannot be calculated by adding the consequences of the individual failures. The proposed method addresses this problem. In exemplifying the method, an analysis of an electric power distribution system in a Swedish municipality is presented. It is concluded that the proposed method facilitates the identification of critical sets of components for large-scale technical infrastructures.
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| 3. |
- Hassel, Henrik, et al.
(författare)
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Identifying Critical Components of Electric Power Systems: A Network Analytic Approach
- 2007
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Ingår i: Risk, Reliability and Societal Safety, Proceedings of the European Safety and Reliability Conference 2007. ; , s. 889-896, s. 889-897
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Konferensbidrag (refereegranskat)abstract
- We propose a method for identifying and ranking critical components and sets of components in technical infrastructures. Criticality is defined as the vulnerability of the system to failure in a specific component, or set of components. The identification of critical components is increasingly difficult when considering multiple simultaneous failures, especially component failures with synergistic effects. The proposed method addresses this problem. Furthermore, it is applied to an electric power distribution system in a Swedish municipality, using a simplified system model to calculate the consequences of component failures. We conclude that the proposed method facilitates the identification of critical failure sets and components for large-scale technical infrastructures. Using the proposed method it is possible to gain insights about the sys tem that otherwise might be overlooked.
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| 4. |
- Johansson, Jonas, et al.
(författare)
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Analysing societal vulnerability to perturbations in electric distribution systems
- 2006
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Ingår i: Proceedings of the International Workshop on Complex Network and Infrastructure Protection.
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Konferensbidrag (refereegranskat)abstract
- Reliable electrical power supply is a requirement for the modern society, therefore it is important to analyse the vulnerability of the electric power system. Network analysis has previously been used to analyse the vulnerability of electric transmission systems, however recent events in Sweden have shown that perturbations in distribution systems also can cause severe societal consequences. Thus, we argue that vulnerability analysis at the distribution level is equally important. Furthermore, previous work has focused on technical aspects of the system and in this paper we take a step towards incorporating societal aspects of vulnerability by suggesting new network analytic measures. We analyse the distribution systems in two Swedish municipalities using the proposed measures. We conclude that the proposed measures can increase the value of using network analysis when analysing societal vulnerability to perturbations in electric distribution systems and that such analysis also can be useful in emergency mitigation and preparedness planning.
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| 5. |
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| 6. |
- Johansson, Jonas, et al.
(författare)
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Analysing the vulnerability of electric distribution systems: A step towards incorporating the societal consequences of disruptions
- 2007
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Ingår i: International Journal of Emergency Management. - 1471-4825. ; 4:1, s. 4-17
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Tidskriftsartikel (refereegranskat)abstract
- Reliable electrical power supply is a prerequisite for the modern society, and if it fails it can cause severe consequences in terms of economic losses and even fatalities. It is thus important to analyse the vulnerability of the electric power system. Network analysis has previously been used to analyse the vulnerability of electric transmission systems, however recent events in Sweden have shown that perturbations in distribution systems also can cause severe societal consequences. Thus, we argue that vulnerability analysis at the distribution level is equally important. Furthermore, previous work has focused on technical aspects of the system and in this paper we take a step towards incorporating societal aspects of vulnerability by suggesting new network analytic measures. We analyse the distribution systems in two Swedish municipalities using the proposed measures. We conclude that the proposed measures can increase the value of using network analysis when analysing societal vulnerability to perturbations in electric distribution systems and that such analysis also can be useful in emergency mitigation and preparedness planning.
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| 7. |
- Johansson, Johas, et al.
(författare)
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Tekniska Infrastruktures sårbarhet
- 2010
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Ingår i: FRIVA - risk, sårbarhet och förmåga. - 9789163376917 ; , s. 111-128
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 8. |
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| 9. |
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| 10. |
- Abrahamsson, Marcus, et al.
(författare)
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Analytical Input to Emergency Preparedness at the Municipal Level – a Case Study
- 2007
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Ingår i: Proceedings of Disaster Recovery and Relief: Current & Future Approaches (TIEMS 2007).
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Konferensbidrag (refereegranskat)abstract
- In this paper an approach for employing risk and vulnerability analyses as the basis for emergency preparedness planning is discussed and exemplified using a case study. The study consisted of three connected parts: a broad scope hazard identification and analysis, an assessment of potential assistance needs should any of the hazards materialise and finally a mapping of actors and dependencies. The case study was conducted as a series of workshops, involving key actors from the studied municipality. Some thirty hazard scenarios, originating from five different categories; accidents, epidemics, infrastructure/utilities breakdown/interruption, criminal activity and socially induced scenarios were identified, described and initially evaluated in terms of possible consequences over a range of predefined attributes. In the next step, an analysis of potential assistance needs that may evolve during the identified scenarios was undertaken. Furthermore, an effort was made to identify municipal actors of central importance in the management of potential emergency scenarios, their respective tasks, resources and dependence on service from various technical infrastructures, other actors etc. Examples from the resulting overview of potential emergency scenarios, generated assistance needs and emergency management actors, tasks, resources and dependencies are presented and discussed, alongside with some implications for societal preparedness activities.
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