Benchmark systems for digital computer simulation of a Static Transfer Switch

This paper presents two benchmark systems for time-domain simulation of a t hyristor based Static Transfer Switch (STS). The objectives are 1) to provi de guidelines for digital simulation of STS systems, 2) to provide a basis for performance evaluation of simulation programs used for STS analysis and 3) to benchmark performance of various detection/control strategies adopte d for STS systems. Each benchmark system is lu composed of 1) supply system , 2) STS, and 3) sensitive load. The two benchmark systems are referred to as STS-1 and STS-2. Simulated performances of the two systems, based on the use of PSCAD/EMTDC software package are provided. Simulation results corre sponding to STS-2 are also compared with the corresponding measurement resu lts.