| The focus of this thesis is a FACTS device known as the Unified Power Flow Controller (UPFC). With its unique capability to control simultaneously real and reactive power flows on a transmission line as well as to regulate voltage at the bus where it is connected, this device creates a tremendous quality impact on power system stability. These features become even more significant knowing that the UPFC can allow loading of the transmission lines close to their thermal limits, forcing the power to flow through the desired paths. This will give the power system operators much needed flexibility in order to satisfy the demands that the deregulated power system will impose.;The most cost-effective way to estimate the effect the UPFC has on a specific power system operation is to simulate that system together with the UPFC by using one of the existing simulations packages. Specifically, the objective of this thesis is to (1) develop a UPFC model that can be incorporated into existing MATLAB based Power System Toolbox (PST), (2) design basic UPFC controllers, and (3) design on supplementary damping control scheme based on fuzzy logic to enhance power system stability. The proposed tools will be tested on the two-area-four-generator system to prove their effectiveness. |
