GM 2019 - Transient Modeling and Analysis of Distribution Systems

Distribution grids have been passive and under-monitored in the past decades. However, with the evolving trend to incorporate dynamic sources such as inverter-based renewables and dynamic loads such as machines in demand response programs, the knowledge of transients in distribution systems becomes essential in stability analysis, protection setting, voltage control, and load management. In addition, the dynamic changes of system and load models are expected to be identified and analyzed quickly requiring fast simulations. The recent composite load models developed by NERC and WECC account for some distribution system dynamics but need further development. System simulation tools such as PSS/E have addressed some transient modeling problems, while specific software platforms have incorporated the interface to co-simulate with other platforms for distribution system transients. This panel will discuss the current and future development of transient models and analysis simulation tools for modern distribution systems.