Mobil kommunikation och högre tillgänglighet vid längre elavbrott
Exemplet stormen Dagmar och 4G-kommunikation inom smarta elnät
KrishanteringLärandeResponssystemKrishanteringsförmågaMognadsmodell4GLTESmarta elnätDagmarStormMobil kommunikationTillgänglighetElavbrottSamverkanElsektornTelesektorn
To be able to secure a safe and reliable power supply is becoming increasingly important since society depends on services and functions that need continuous power supply. The delivery rate in Swedish power supply is 99.98 % which insists on a high availability. During the past decade several storms has passed Sweden which resulted in large amount of tree felling leading to extended power outages. During these storms many socially critical activities, such as electric utility company Fortum, experienced disruption in mobile communication which affected the crisis management. This paper has investigated Swedish mobile operators? crisis management at Hi3G, Tele2 and TeliaSonera with a case study of the storm Dagmar that hit Sweden during December in 2011. Furthermore this paper has investigated if 4G-communication (LTE) is appropriate to use in the next generation power grid, also known as smart grid. The study is based on literature studies and interviews with respondents from companies such as Hi3G, Tele2, TeliaSonera, Fortum and Ericsson. It has shown that the mobile operators have well developed crises management. The availability in mobile communication is dependent on power supply why it is critical to have backup power supply during extended power outages. Backup power supply varies between mobile operators. Interaction between mobile operators and electric utility companies during crisis should increase the availability in power grids and mobile communication. The LTE technology is well developed and could be used in smart grids to collect information. To use LTE for critical processes, such as controlling breakers, is not suitable with todays performance.