The aim of dynamic contingency calculations in power systems is to estimate the effects of assumed disturbances, such as loss of generation , faults etc. Due to the large diminutions of the problem, these simulations require considerable computing time and cost , which my be reduced by parallel computation. In the paper some results of a study employing a prototype parallel computer (SMS) are presented. It consists of a bank of presently 16 microcomputers bus-connected to a process computer Siemens 330-R 30 . Each of the modules is programmed to simulate a node of the power grid . Generators with their associated control are represented by models of 13 states . All programming is performed through the control computer in Fortran .