Abstract
In this paper, a new application of Superconducting Magnetic Energy Storage (SMES) for diagnosis of power systems is proposed. Basic experiments for measurement of damping coefficient of power systems by use of SMES are carried out in an experimental system with a small generator, artificial transmission lines and a small SMES. The SMES gives small power disturbances to the power system without affecting oparating conditions of the power system. The small power oscillations in the power system due to continuous power disturbances generated by SMES are observed. The relations among the damping coefficient, the power disturbances and the power change of SMES are discussed for one-machine infinite-bus system. The damping coefficients of the power system are obtained by investigating the oscillations due to the sinusoidal power change of SMES. The possibility of estimation of the steady state power system stability by monitoring the damping coefficients of the operated power system by use of SMES can be shown experimentally.
