Development of a flywheel energy storage system model in RSCAD-RTDS and comparison with PSCAD

In this paper a detailed model of a flywheel energy storage system (FESS) for simulation in the RSCAD-RTDS platform is developed and compared with an implementation developed using the PSCAD-EMTDC program. Grid- and machine-side con-verter operation is fully considered in the developed model. The operation of the FESS under speed and DC link voltage regu-lation modes is tested in both platforms. Indirect field-oriented control (FOC) and sinusoidal PWM (SPWM) are considered for the machine control. To enable a direct, fair comparison between the two modelling platforms the PSCAD implementation follows closely the block structure and parameters used in the RSCAD version. The differences between building blocks within each simulation environment are highlighted, and simulation results are compared under charge and discharge operation modes. Contrary to previously published results, good agreement between implementations is obtained when similar parameters and equivalent blocks are used in both environments.