Designing and modeling of a synchronous generator using AGC, PSS, and AVR case study on Tis Abay II hydroelectric power system

Abstract

This paper explains the design, modeling, and control of a synchronous generator using Automatic Generation Control (AGC) and Power System Stabilizer (PSS) with a combination of Automatic Voltage Regulator (AVR) for a hydroelectric power system. In the proposed system the damping torque and another source of negative damping of the generator can be reduced by the AVR. A classical PID controller is used in the AVR system. Interconnecting (synchronizing) the generator in a tie system, the overall system fluctuation due to a large disturbance in one of the interconnections is mathematically analyzed and the transient & steady state performance of the controller are evaluated. Generally the work intended in designing and modeling the controller for enhancement of power system stability with steady-state and transient analysis, the application to the sudden increase in power input, and the application of three-phase fault have been examined using Matlab/Simulink. The model is also used to simulate the performance of tie line system under the same phase faults as well as load disturbance conditions. Power system stabilizers designed to enhance the damping of power system oscillations. The designed PSS and AGC improved the performance of power system dynamic stability. Besides, the desired frequency and power interchange with the neighboring system is maintained by the AGC. The total system generation against system load and losses could be balanced.