Performance analysis of FL, PI and PID controller for AGC and AVR of a Two-Area Power System Chandrashekar.M.J

Abstract- Present work deals with the combination of automatic generation control (AGC) with automatic voltage regulator control (AVR) and the implementation of PI, PID and fuzzy logic controller for two area system. The purpose of the AGC is for balancing the system‟s total generation against system load and losses. If any mismatch between generation and demand occur the system frequency may deviate from preset value. Thus, high value of frequency deviation may lead to failure of the system. The role of AVR is to hold terminal voltage magnitude of the generator at a preset level. The interaction between frequency deviation and voltage deviation is analyzed and studied in this paper. System performance and operation has been evaluated at various loading disturbances. In this paper we deal with the design, implementation and operation performance of fuzzy logic controller with the combined loop of AGC & AVR for interconnected power system. The fuzzy controller is implemented in order to control the area control error calculation of AGC & excitation of AVR, which determines the deficit or extra generation that has to be corrected. Simulation results (using MATLAB/SIMULINK) shows that the proposed modified fuzzy control offers better performance than PI and PID controllers at different operating conditions