Abstract:
Power systems is the backbone of electrical distribution. Power systems is interconnected in
nature. Various single areas are connected together to make a bigger system called the multiarea
system. There are various disturbances in Power System like change of load, short
circuit, open circuit occurring time to time in the system. Any type of these disturbances in
this system causes deviation in the system frequency. The electrical equipment that are used
in daily life are highly dependent on system frequency. If there is any frequency change the
equipment gets affected and will cause mal-operation of the whole system. So it is highly
important to maintain the deviations within limits as soon as possible after the disturbances.
This thesis presents the problem of load frequency control in power systems. Load Frequency
Control is very important in Power Systems for safe and reliable power supply. Load
Frequency Control restores the balance between generation and end load demand. This causes
stabilization of system frequency. This thesis gives the solution to this problem by the designs
of various controllers. Work is done to get faster and better response for Load Frequency
Control. In this thesis, conventional PID controllers, fuzzy controllers, HVDC link, and
Particle Swarm Optimization based controllers are used to study Load Frequency Control in
Multi-area power systems. It shows the effectiveness of using these controllers for Load
Frequency Control. By the use of these controllers the frequency of the system stabilizes. In
this thesis the controllers were used to obtain the response of the system after disturbance in
multi-area systems. The results obtained by these controllers are compared with each other
and conclusion is obtained at the end.
