Comparison of the ATP version of the EMTP and the NETOMAC program for simulation of HVDC systems

This paper investigates the capabilities and limitations of the EMTP and the NETOMAC program as applied to HVDC system simulation. The fundamental differences between the two programs and their effect on simulation results are described. Consistency of the results obtained from these programs is examined through simulation of a test HVDC network. As expected, a very high degree of agreement between the two sets of simulation results proved to be achievable, but only when particular care was taken to overcome internal program differences. Finally, the new advanced stability feature of NETOMAC is briefly discussed and then tested against the complex transient models established in the EMTP and in the NETOMAC transients program section