Certification of Power System Stabilizing by Adjustable Speed Generator with Flywheel Effect

Abstract

A prototype 100kVA machine of adjustable speed generator with flywheel effect(FWM) and self-commutated converter was made. Experiments for power system stabilizing control were carried out in the 3.3kV mimic power system. The time responses of the machine were 20ms both for active power control and voltage control. It was certified that the synchronous generator does not step out when FWM is installed in the power system, even under the 3LG-O fault. To verify power system stability effects by FWM, the experiments were made for two control schemes, Braking control and damping control. By the experiments, the optimal parameters and conditions are studied. Theoretical analyses were also made and showed good agreement with experiments. Through these studies it was verified that FWM is very effective tool for improving power system stability.