APPLICATION OF OPTIMIZATION TECHNIQUE IN FINDING LOCATION OF SWITCH & IT’S OPTIMAL NUMBERS IN DISTRIBUTION NETWORK

Abstract

Reliability worth assessment is currently receiving considerable attention as it provides the opportunity to incorporate the costs or losses incurred by utility customers as a result of power failures in the overall analysis of system costs and benefits. A variety of approaches have been utilized to assess the cost of power interruptions. These include analytical methods, case studies and customer survey approaches. The survey approach can easily include the effect of many factors such as time of occurrence, duration and frequency of interruption and therefore provides a practical framework for detailed analysis. In recent years, power demand has increased with high information-oriented society. Since electric power systems play a major role in a modern society, professional engineers are responsible for the planning, design, and operation of power systems. A modern power system are desired to have high efficiency and high reliability. In this situation, new generation facilities and expansion of the transmission lines must be planed and constructed maintaining reliability of power systems and reducing loss of load in faults. However modern power systems are complex, highly integrated, and very large. It is difficult to determine the optimal set up point for that reason. Power system planning has been studied over decades. By formulation an optimization problem which has non-linearity with integer and continuous variables. The objective of this problem is maintenance of reliability and reducing loss of load. The exact optimal solution of this problem can be obtained by complete enumeration. However this method cannot be applied to realistic optimization problem due to its computation intensity.