AUTHORS: Prakash N. B., Karuppiah N., Vishnu Kumar V., Vishnu R. M., Zainy Mohammed Yousuf

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ABSTRACT: In present scenario, the power systems are operated to its maximum load ability due to the increase in demand. This affects the power flow as well as the system frequency. This paper addresses the issue of load frequency control of a three area system. A modified Proportional Integral Derivative controller called Fractional Order PID (FOPID) controller is employed to resolve this issue. The proposed FOPID controller is effectively tuned to control the Load frequency of the system. A three area system with different generating units is considered to evaluate the performance of the proposed controller. The robust performance of the FOPID controller is assessed by injecting several disturbances on to the system. At the same time its performance is appraised by comparing it with conventional PI and PID controller. The results have proved that the FOPID controller was very efficient and robust to handle the problem of load frequency changes in the system. The system simulation is realized by using Matlab/Simulink software.

KEYWORDS: Frequency regulation, FOPID, PID, PI Controller

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