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Performance Comparison of Various Controllers for Load Frequency Control of Multi-Area Gas-thermal System

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Document pages: 7 pages

Abstract: Load frequency control (LFC) of an interconnected multi-area system with gas plant in Area-1 and thermal plants in Area-2 and Area-3 has been attempted in this work. The performance of Integral (I), Proportional-Integral (PI), Proportional-Integral-Derivative (PID) and Tilt-Integral-Derivative (TID) controllers are evaluated on the system taken for investigation. The application of Social spider optimization (SSO) is made in LFC for simultaneous optimization of the controller parameters. The gains of the controllers are optimized using SSO and the responses so obtained are compared. The comparisons between the responses obtained using TID, I, PI and PID reveal the better performance of TID controller in terms of settling time, peak deviation and magnitude of the oscillations. The study has been extended to the application of random load perturbation in place of step load. The comparison of the responses so obtained are compared which proves the better performance of TID over other controllers in the case of random variation of load as well. Another analysis has been carried out by using TID in one area and conventional I in other areas, and comparing the responses with I in all the areas reveal that the combination of TID and I gives better results.

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