Ensuring dependability in service oriented computing.
Rune Gustavsson · 2006
Next generation of energy systems, being dependant on Renewable Energy Resources (RES) and Distributed Generation (DG), will typically be based on flexible virtual cells of cells of balanced power consumption – generation rather than present day vertical hierarchical grid systems. Furthermore, new requirements on the supporting information infrastructure will pose new dependability challenges to the systems involved. Such challenges include management of non-linear dependencies, flexibility, and self*-attributes (e.g., organization, configuration, and repair) As a consequence, we have to decouple present day proprietary hierarchical SCADA systems into sets of services that allow for horizontal as well as vertical integration of services. That is, supporting and ensuring dependable operations and sustainable business models of future virtual utilities. In fact those virtual utilities are integrating two critical infrastructures; power grids and cyber networks. To allow for this flexibility and assuring dependability we argue that the underlying infrastructures will be built upon Service Oriented Architectures (SOA) as exemplified by present day web services and the ongoing developments on GRID computing. We propose in this paper a methodology towards ensuring quality of services in service-oriented critical infrastructures. 1