Improvement of load frequency control with fuzzy gain scheduled SMES unit considering governor dead-band and GRC

Since a superconducting magnetic energy storage (SMES) unit with a self-commutated converter is capable of controlling both the active and reactive power simultaneously and quickly, increasing attention has been focused recently on power system stabilization by SMES control. In this study, a fuzzy gain scheduled supplementary control scheme with SMES unit is proposed and applied to automatic generation control (AGC) in power system for the improvement of load frequency control (LFC). The performances of the system for load changes in the areas in the interconnected power system are studied. The computer simulation of the interconnected power system shows that SMES unit with the proposed gain scheduled supplementary controller can perform a more effective primary frequency control for multi area power system.