Matlab Design and Simulation of AGC and AVR for Single Area Power System with Fuzzy Logic Control
Parveen Dabur1, Naresh Kumar Yadav2, Ram Avtar3 

1Parveen Dabur, Electrical Engg., Hindu college of Engg., Sonipat, India.
2Naresh Kumar Yadav, Electrical Engg., D. C. R. U. S. T, Murthal, Sonipat, India.
3Ram Avtar, WIMAX & CDMA, BSNL, Sonipat, India.
Manuscript received on November 21, 2011. | Revised Manuscript received on November 30, 2011. | Manuscript published on January 05, 2012. | PP: 44-49 | Volume-1 Issue-6, January 2012. | Retrieval Number: F0266111511/2012©BEIESP
Open Access | Ethics and Policies | Cite
© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (

Abstract: This paper deals with the combination of automatic generation control (AGC) of thermal system with automatic voltage control (AVR). In this particular work thermal unit is considered with single area concept. The primary purpose of the AGC is to balance the total system generation against system load and losses. Any mismatch between generation and demand causes the system frequency to deviate from scheduled value. Thus high frequency deviation may lead to system collapse. Further the role of automatic voltage regulator is to hold terminal voltage magnitude of synchronous generator at a specified level. The interaction between frequency deviation and voltage deviation is analyzed in this paper. System performance has been evaluated at various loading disturbances. This paper describes the design, implementation and operation performance of fuzzy controller as part of the combined loop of AGC & AVR for single area power system. The fuzzy controller is implemented in the control of ACE calculation in the case of AGC & excitation in case of AVR, which determines the shortfall or surplus generation that has to be corrected. In the case of AVR, fuzzy with PID has been implemented.
Keywords: Automatic Generation Control (AGC), Automatic Voltage Regulator (AVR), Area Control Error (ACE), Frequency Response, Voltage Response, Govemor Action, Power System Operation, Fuzzy logic, Fuzzy control.