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The Nordic 44 test network


Power systems are among the largest, most complex systems ever constructed. Consequently, analysis of these systems often involve computer simulations, since it would be too complicated to analyse them analytically. However, for the purpose of education and understanding certain phenomena, small test networks specifically tailored for capturing the interesting phenomena, while still being small enough to be analysed analytically, are in use. Similarly, even with the computational power available today, small test networks are often used for studying specific phenomena during computer simulations. One such test network is the Nordic 44 (or N44) test network.

N44 is an aggregated dynamic power system simulation model designed for analysis of dynamic phenomena in the Nordic power grid. This network was initially developed at The Norwegian University of Science and Technology (NTNU) and has gone through many iterations before reaching its present state. In this short memo, the different stages of development of the network will be described along with a brief overview of how the multiple variations of N44 have been used and how they differ. Although, this is a task not necessary for the ontinued use and development of the network, it can hopefully be of interest for present and future users.




  • Research Council of Norway (RCN) / 255226





  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Energisystemer



View this publication at Cristin