Fuzzy logic based load frequency control of power system

Power system is a large interconnected and complex network with several sources and loads. The rise in
population leads to changes and uncertainty in load demand. It is the accountability of the utilities to
meet the load demand without violating power system operational constraints. Load frequency control
is solely responsible for supplying reliable electrical power to the consumers. Its ultimate function is
to regulate the output power of the utility generator with respect to load change without affecting system
frequency and also to control the tie-line power such as to sustain the frequency and power flow in further
areas within recommended limits. The concept proposed in the paper represents the load frequency
control of two area system with conventional proportional integral controller, proportional integral
derivative controller, fuzzy logic controller and fuzzy tuned proportional integral controller. Simulation
studies are carried out using SIMULINK.