الفهرس 
Chapter 1: IntroductionOnly 14 pages are availabe for public view
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Abstract
Although the distribution systems recently become active distribution ones, they are still suffer from many problems that represent challenges for researchers. Firstly, the restrictions on Distributed Generation (DG) penetration level. Secondly, the poor voltage quality at distribution systems. Thirdly, the high power loss in distribution system and its costly invoices. D-FACTS devices are analogous to Flexible AC transmission systems (FACTS) that are used in transmission system. D-FACTS devices are power electronic converters that have an increasingly important role to play in modern electrical distribution systems. One example of D-FACTS in such systems is D-STATCOM, which can be used to provide an efficient and effective means of improving the distribution system performance including minimization of active power loss, controlling power system voltages, removing restrictions on DG penetration level. In this thesis, a number of aspects of D-STATCOM devices allocation are explored. These include their optimal number, location, and size. The Particle Swarm Optimization (PSO) algorithm is proposed utilizing the Loss Sensitivity Factor (LSF) to obtain these aspects in order to minimize total power losses, bus voltage deviations, restrictions on DG penetration level, and overloaded lines in the radial distribution system with DGs. The validity of the proposed algorithm is examined on modified IEEE 33-bus and IEEE 69-bus radial distribution systems. All simulations are done using a coded program using MATLAB where the modeling of D-STATCOM is tested and verified. The DG penetration levels, the voltage profile and the total active power losses of the distribution system are compared before and after D-STATCOM compensation. In addition, the effect of different load types as well as various DG types on D-STATCOM optimal allocation are introduced and analyzed.