A study of power distribution system reconfiguration based on reliability indices
Abstract
Network reconfiguration is one of the feasible methods for reducing the distribution network loss. The reconfiguration of a distribution system is a process that alters the feeder topological structure by changing the open/ closed status of the sectionalizing (normally closed) and tie (normally open) switches in the system, with the objective of improving performance. Reliability indices, such as System Average Interruption Frequency Index (SAIFI) and Energy Not Supplied (ENS) indices, are important measures of system reliability. Very few published articles include detailed methods for calculation of the reliability indices. This thesis includes a detailed explanation of the reliability index calculation process and the algorithm for programming it. This algorithm is used within the Fast, Non-dominated sorting genetic algorithm (FNSGA) to determine switch sets for multi-objective optimization purposes. The objectives of the problem in normal operation are to improve the reliability level of the system, and obtain small power loss with a relatively high voltage profile. This thesis adopts FNSGA for the purpose of solving the Distribution System Reconfiguration (DSR) problem by satisfying reliability objectives simultaneously with a relatively small number of generations, small population sizes, and relatively short computation time. In the thesis, a 5-bus sample test system was introduced to illustrate the calculation of the reliability indices and the standard IEEE 16-bus and 32-bus test system were used to evaluate the algorithm.
Degree
M.S.
Thesis Department
Rights
OpenAccess.
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