Development of a New 21-Bus Test Power System for Teaching Purposes and Stability Studies using Digsilent Powerfactory

This paper presents a new 21-bus power system model developed using the simulation software ‘DIgSILENT PowerFactory’ representing the reduced Norwegian power transmission network. The network includes a 132 kV regional network and a 420 kV transmission network to visualize local and inter-area modes of oscillations. The network data is adopted from the benchmark model ‘Nordic 44’. The model is validated by analyzing some of the static and dynamic simulation results recommended by IEEE task force for the benchmark models. The presented model is recommended to use teaching power system dynamics for new electrical engineers.