الفهرس | Only 14 pages are availabe for public view |
Abstract There has been a continuous need for generating more electrical energy to face the continuous increase in energy demand to match the increase in world population worldwide. This renders the increase of the number and size of generating units in the power systems over the years. Unfortunately, the increase of unit’s size increases the complexity of their control systems and adversely affects system performance and stability. To overcome these problems, a number of techniques has been designed and implemented to enhance system performance and increase the stability margins. Modern control techniques and flexible AC Transmission systems (FACTS) are two different approaches which have been used to overcome problems resulted from power system complexity and up rating of generating unit outputs. The object of this thesis is to combine modern control techniques and FACTS to enhance system performance and increase the stability margin. A self tuning power system stabilizer is designed for a power system which consists of a turbo generating unit connected to a large power system via a transformer and a double circuit transmission line. The algorithm used is simple and is most suitable for on line application. The results illustrate a significant improvement in the performance of power systems which include flexible AC Transmission, by combining self tuning Power System Stabilizers (STPSS) and Static Var Compensator (SVC). |