AGC & AVR of Interconnected Thermal Power System While Considering the Effect of GRCs
Sandeep Kumar1, Gourav Sharma2, Gurdeepinder Singh3
1Sandeep Kumar, Electrical Engg., BMIET, Sonipat, India.
2Gourav Sharma, Electrical Engg. M.M.U, Mullana, Ambala, India.

3Gurdeepinder Singh, Electrical Engg., H.I.T, Sonipat, India.
Manuscript received on February 09, 2012. | Revised Manuscript received on February 20, 2012. | Manuscript published on March 05, 2012. | PP: 69-74 | Volume-2 Issue-1, March 2012. | Retrieval Number: A0380012111/2012©BEIESP
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Abstract: As the interconnected power system transmits the power from one area to another system frequency will inevitable deviate from scheduled frequency, resulting in a frequency error. A control system is essential to correct the deviation in the presence of external disturbances and structural uncertainties to ensure a safe and smooth operation of power system. Thus design of Automatic Generation Control (AGC) and Automatic Voltage Regulator (AVR) system play a vital role in the automation of power system. This paper deals with automation of three area interconnected reheat thermal power with consideration of Generation Rate Constraint (GRCs). The primary object of the AGC is to balance the total system generation against system load and losses, while considering the effect of Generation Rate Constraint (GRCs). So that the desired frequency and power interchange with neighboring systems are maintained in order to minimize the transient deviations and to provide zero steady state error in appropriate short time. Further the role of automatic voltage control is to maintain the terminal voltage of synchronous generator in order to maintain the bus bar voltage. Otherwise bus bar voltage goes beyond permitted limit.
Keywords: Area Control Error (ACE), Automatic Generation Control (AGC), Automatic Voltage Control (AVC), Automatic Voltage Regulator (AVR), Generation Rate Constraints (GRCs)