Improvement of load frequency control with fuzzy gain scheduled superconducting magnetic energy storage unit

With the increase in size and capacity of electric power systems and the growth of widespread interconnections, the problem of power oscillations due to the reduced system damping has become increasingly serious. Since a superconducting magnetic energy storage (SMES) unit with a self-commutated converter is capable of controlling both the active and reactive powers simultaneously and quickly, increasing attention has been focused recently on power system stabilization by SMES control. This paper proposes a SMES with the fuzzy gain scheduled supplementary controller associated with the automatic generation control (AGC) for the improvement of load frequency control (LFC). It is shown that SMES with the gain scheduled supplementary controller can perform a more effective primary frequency control for multi area power system. Simulation studies based on MATLAB are presented on a two-area power system after carrying out the necessary modeling exercise.