text: abstract— s trong digitalization and shifting from unidirectional
  to bidirectional topology have transformed the electrical grid
  into a cyber-physical energy system, i.e. smart grid, with strong
  interdependency among various domains. it is mandatory to
  develop a comprehensive and holistic validation approach for
  such large scale system. however, a single research
  infrastructure may not have sufficient expertise and equipment
  for such test, without huge or eventually unfeasible investment.
  in this paper, we propose another adequate approach:
  connecting existing and established infrastructures with
  complementary specialization and facilities into a crossinfrastructure holistic experiment. the proposition enables
  testing of cpes assessment research in near real -world scenario
  without significant investment while efficiently exploiting the
  existing infrastructures. hybrid cloud based architecture is
  considered as the support for such setup and the design of crossinfrastructure experiment is also covered.
  index terms— cyber-physical energy s ystem, interoperability,
  co-simulation, hardware-in-the-loop, cross-infrastructure.