Reliable signaling an emergency shutdown in large-scale, wireless controlled industrial plants

  • Authors:
  • Stefan Unterschütz;Volker Turau

  • Affiliations:
  • Hamburg University of Technology, Hamburg, Germany;Hamburg University of Technology, Hamburg, Germany

  • Venue:
  • Proceedings of the 10th ACM international symposium on Mobility management and wireless access
  • Year:
  • 2012

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Abstract

This paper considers the use of wireless mesh networks as a communication infrastructure for monitoring and controlling industrial plants and processes such as solar power plants. In the latter, several thousands, tiltable and rotatable flat mirrors (heliostats) focus sunlight on a receiver tower. Solar power plants require a reliable and highly scalable communication infrastructure. Especially in case of a hazardous situation, the safety system must rapidly alert all heliostats, so that they drive into a stow position. The paper picks up this topic and presents a concept for a reliable wirelessly controlled emergency shutdown, even in cases when the connectivity of the network no longer holds. At this juncture, we face the challenge of communication in large-scale and extremely dense wireless networks. To this end, we introduce a robust broadcasting algorithm based on connected dominating sets. Analytical results of this paper are substantiated by simulations. Finally, prospects of wireless controlled safety systems are discussed.