Efficient Large-Scale Simulation of Integrated Transmission and Distribution Systems

Abstract

The changing paradigm of power systems imposes emerging challenges for power system design, planning, and operation. The paradigm shift of power systems has been reflected in modeling and simulation methods used for power system analysis as well. Simulation frameworks are urged to continuously follow growing demand for large-scale system simulation, simulation of fast system dynamics, and high-fidelity models. There is a tendency toward performing joint simulations of systems that have been studied separately in the past. For instance, a joint simulation including detailed models of transmission and distribution systems is performed nowadays to analyze interdependencies and unforeseen interactions between integrated systems, particularly in case of scenarios with high level of penetration of distributed generation (DG). Additionally, envisioned complexity of future power systems requires simulation frameworks that enable interdisciplinary and multi-domain studies. Multi-physics simulation the approach is utilized for the holistic analysis of the city district energy systems that represent hybrid energy systems. Studies on architectures in smart grids require a simulation framework that enables joint analysis of power systems and information and communication technology systems. To maintain secure operations of transmission and distribution systems, it is important to have a better understanding of the coupling of transmission and distribution systems.