Implementation and validation of the Nordic test system in DIgSILENT PowerFactory

This paper presents the implementation of the Nordic test system in DIgSILENT PowerFactory. The implemented system is a variant of the Nordic32 network and is based on the technical report “Test Systems for Voltage Stability Analysis and Security Assessment” prepared by the IEEE Power System Dynamic Performance Committee, the Power System Stability Subcommittee, and the Test Systems for Voltage Stability and Security Assessment Task Force. This work deems all of the implemented controllers and validates the PowerFactory implementation against the original model presented in the aforementioned technical report. It is shown through RMS simulations that the action of load tap changers and over excitation limiters are leading forces through a long-term voltage collapse and therefore, their accurate modeling is crucial. Furthermore, the implemented system can be whether downloaded from the IEEE PES Power System Dynamic Performance Committee website or requested directly to the authors.