Automatic generation control by SMES-SMES controllers of two-area hydro-hydro system

In this paper, oppositional biogeography based optimization (OBBO) algorithm for load frequency control with interconnected two-area hydro-hydro power system have been investigated. As a consequence of continually load variation, the frequency of the power system changes over time. To stabilize the system frequency oscillations, the active power can be controlled via superconducting magnetic energy storage device (SMES). The significant improvement of optimal transient performance is observed with the addition of SMES unit fitted in both areas. Analysis reveals that SMES unit fitted in either of the areas is as effective as SMES units fitted in both the areas and improves the dynamic performances to a considerable extent following a load disturbance in either of the areas. Gains of the integral controller in LFC loop and parameters of SMES are optimized with the help of OBBO technique. The performance of the proposed OBBO based controller is better as compared with BBO, CRPSO and RGO controller in the presence of SMES. The simulation results indicate the superiority of the proposed OBBO based controller with SMES in terms of system oscillations, settling time and frequency deviation.