Dynamic performance of multi-area hydro thermal power systems with integral controller considering various performance indices methods

Abstract

This paper deals with automatic generation control of multi area power system, which is carried out a three area hydrothermal power system with integral controller. This system consisting of two thermal areas and one hydro area. The thermal area carries a reheat turbine and hydro area consists of mechanical governor. These areas are interconnected through tie-lines the power is transferred or exchanged through these tie-lines, for obtaining of better response when disturbance occurs. The system dynamic performance is controlled with integral controller. The optimization of integral controllers gain has been carried out using Integral Time Square Error (ITSE), Integral Square Error (ISE), Integral Absolute Error (IAE) and Integral Absolute Time Error (IATE).The minimum value of performance index gives better dynamic response. Investigation has been made for selection of suitable technique for tuning integral controller gain when the 1% of step load is given in the thermal area (area 1). Finally simulation results conclude that IATE method is better compare to ISE, IAE and ITSE.

Artificial Intelligence in Performance Analysis of Load Frequency Control in Thermal-Wind-Hydro Power Systems

“…The overall system performance is improved based on the control design of the system. As in [1,2,35], the integral controller reduces or eliminates the steady state error.…”

“…But practically maintaining the mentioned quantity/ parameters within the specified or nominal value is very complex as the load is continuously varied due to enormous growth in industries. In order to overcome this drawback power generating units are interconnected through tie-line [1][2][3][4][5][6]. During normal loading conditions each area carries its own load and keep the system parameters within the specified limit.…”

“…Several control techniques have been proposed for the LFC of power systems to keep the system parameters at their specified value during sudden and normal loading conditions [1][2][3][4][5][6][7][8][9][10]. Literatures show that the system performance depends on both the employed controller and the selected objective function for tuning the controller parameters.…”

Automatic generation control of three area hydro-thermal power systems with electric and mechanical governor

“…When load to a system varies, the speed of the turbine starts varying which effects the generation of desired amount of power [4], [6]. Thus there arises fluctuations and disturbance in the frequency.…”

“…PI controller is introduced in the system to modify the error signal and to produce a control signal so as to control the variations and fluctuations in frequency. Optimized value of gain is calculated using ITAE optimization technique so as to get better system performance [4].…”