الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Inserting capacitor banks in distribution networks has a great impact on the system performance. Advantages such as energy losses reduction and voltage enhancement can be achieved by capacitor connection to the system. This thesis presented the problem of the defining the optimal location and sizes of capacitor banks from a different point of view. It investigates effects of considering the periods of faults of the cables on the sizes and places of these capacitors. The mentioned problem is described as an optimization problem. The target of the problem is minimizing the objective function which is the overall cost of the system including the cost related to capacitor banks and that is related to the energy losses. Limits of voltage, power factor, capacitors` sizes and overcompensation are presented as constraints of the objective function. A generic methodology utilizes the genetic algorithm (GA) as an optimization technique to get the optimal solution of the concerned problem. As the fault periods of the cables are considered during the optimization process, then the problem is solved on two steps: one considers the normal operation only (i.e. neglects all fault periods) (OCPN) and the other considers both normal and fault cases (OCPNF). A comprehensive comparison is held between all results obtained by the first step and those obtained from the second step to discuss the effect of the fault periods on the sizes and places of the capacitor banks in the system. The previous methodology is applied on an actual 15-bus 11 kV loop distribution system. The comparison shows that considering the fault periods in the optimization problem has an obvious effect on reduction of the total energy loss of the system and increasing the profitability of it.