Decentralized Load Frequency Control on Each Power Plant

Abstract

This paper presents a load frequency control system using a refined controller for interconnected power systems. The controller consists of integral compensator and state feedback. It has been proven that any transfer function between a reference input and a controlled output or between a disturbance and a controlled output is attained by this controller, if it is attainable by realizable linear compensation. Parameters of the controller are determined upon the optimal regulator theory and additional calculation.
The controller can reduce time deviation and inadvertent interchange without information about tie-lines as well as deviations of frequency and net interchange power. This structural feature makes it possible to design the control system for each regulating power plant instead of for the control center. If some state variables are not available, the control system can be designed with the remainder of state variables and a dynamic compensator.
Simulation results show that the control system is superior to the TBC system.