Performance analysis of three area thermal power systems with different steam system configurations considering non linearity and boiler dynamics using conventional controller

This paper highlights the performance of Load Frequency Control (LFC) or Automatic Generation Control (AGC) of an interconnected three area thermal power system. In the thermal power system steam turbine having different steam stages. Tandem compound type steam turbine is considered with different steam stages. Based on the steam system configurations, steam turbines are named as non-reheat, single stage reheat and double stage reheat turbine. The effect of different steam stages are investigated with and without considering the effects of non linearity and boiler dynamics effects. The performance comparison is made with help of conventional PI controller. The conventional P and I controller gain values are optimized by using ITAE technique. One percent step load disturbance is considered in either area of the system. Non-reheat turbine yields improved performance when non linearity and boiler dynamic effects are not taken into an account. Finally, simulation results reveals that double stage reheat turbine grant superior controlled performance with and without considering the effects of non linearity and boiler dynamics.