الفهرس 
OPTIMIZATION TECHNIQUESOnly 14 pages are availabe for public view
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Abstract
Integration of distributed generation (DG) units has become urgent need, especially in the modern grids, in order to meet the increasing load demand. This helps in reducing the pressure on the main grid and thus they can enhance both the system stability and reliability. In addition, DG integration in power systems provides the benefits in deferral of constructing new power plants. Also, most DGs are based on renewable energy resources which don’t form any threat to the environmental.
Despite these advantages, DGs can devolve some problems to the power system by increasing the fault currents which greatly effect on the coordination between the protective devices. This in turn causes malfunction in the protective devices, which has a destructive impact on the power system in the fault state. This problem is considered a vital one which should be focused on. Therefore, fault current limiters (FCLs) can solve this problem through limiting these higher fault currents accompanied with the integration of DGs.
This thesis aims to enhance the operation of distribution networks through selecting optimal location and sizing of both DGs and FCLs where two different procedures are suggested and formulated as bi-stage and single stage procedure. According to this, a novel coyote optimization algorithm (COA) is introduced and developed for finding the proposed model solution.
Firstly, the bi-stage procedure is presented that aims for determining optimal allocation of DGs in a separate stage using COA. It is employed and compared to other well-known metaheuristic algorithms. After that, an iterative method via electro transient analyzer program (ETAP) is proposed to obtain the optimal allocation of FCLs. The applications are performed on three test systems which are IEEE 33-bus, IEEE 69-bus and real distribution system located in east Delta region, Egypt.