A comprehensive digital computer model of the two-area interconnected power system including the governor deadband non-linearity, steam reheat constraints and the boiler dynamics is developed. The improvement in AGC with the addition of a small capacity Superconducting Magnetic Energy Storage (SMES) unit is studied. Time domain simulations are used to study the performance of the power system and control logic. Optimization of gain parameters and the stability studies are carried out by the second method of Lyapunov. Suitable methods for the control of SMES units are described.

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A new scheme using a small rating capacitive energy storage (CES) unit for the improvement of the dynamic performance of a power system is proposed. A comprehensive digital computer model of a two-area interconnected power system including governor deadband non-linearity, steam reheat constraints and boiler dynamics is developed. Time domain simulations are used to study the performance of the power system and control logic. Optimisation of gain parameters and stability studies are carried out by the second method of Lyapunov. Suitable methods for control of the CES units are described. .1 System data [4,12,20] Area capacity, P Rl = P R2 = 1000 MW f° = 60 H z K pl = K p2 = 120 Hz/p.u. MW co o = 3.14 radian R l = R 2 = 2.4 Hz/p.u. MW D 1 =D 2 = 8.33 x 10" 3 p.u. MW/Hz B l =B 2 =p = 0.425 p.u. MW/Hz T pl = T p2 = 20 S T°2 = 0.0707 MW/radian AP m = 0.01 p.u. MW AP D2 = 0.0 p.u. MW Appendixes 11

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