Power system stabilization by superconducting magnetic energy storage connected to rotating exciter

The authors describe a combination of a rotating exciter and a superconducting magnetic energy storage (SMES) system for efficient power system stabilization. A SMES system connected to an exciter rotating with a turbine-rotor shaft is proposed. The exciter is installed exclusively to supply current for the SMES. Since electrical power output from the SMES is converted into a mechanical torque of the generator directly by the exciter, it is expected that power swings of the generator will be damped efficiently. Several numerical studies demonstrate that the proposed control system is capable of stabilizing torsional oscillations as well as electromechanical oscillations in power systems significantly.<>