Application of Classical and Fuzzy Logic Controllers for AGC under Deregulated Environment

Automatic generation control (AGC) of a power system provides power demand signals for power generators to control frequency and tie-line power flow due to the large load changes or other disturbances. Occurrence of large real power imbalance causes large frequency deviations from its nominal value which may be a threat to secure operation of power system. To avoid such situation, emergency control to maintain the system frequency using classical controllers and fuzzy logic controller is proposed in this paper. The performance of both classical and fuzzy logic controllers is compared under three different cases in deregulated environment. It is observed that the fuzzy logic based controller give better optimal transient response of frequency and tie line power changes compared to classical controllers.