EVALUATION OF PROBABILITY DISTRIBUTIONS ASSOCIATED WITH THE RELIABILITY INDICES OF ELECTRIC DISTRIBUTION SYSTEMS
Date
1985-07
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ORCID
Type
Degree Level
Masters
Abstract
Reliability indices of an electric distribution system are functions of component failures, repairs and the system restoration times which are random by nature. These indices are, therefore, random variables and can be described by probability distributions. The mean values of the probability distributions associated with reliability indices are very useful and conventional reliability analysis is normally only concerned with these values. There is, however, an increased awareness of the need to evaluate parameters which give information regarding the variation of the indices around their mean values. This thesis presents an analytical approach to evaluate the probability distributions associated with the reliability indices of electric distribution systems. This approach uses the average values and the second, third and fourth central moments of the reliability indices to approximate their probability distributions. The development of the technique to evaluate the moments of the reliability indices is the major contribution of this thesis. A computer program using the analytical approach has been developed to analyze a radial distribution system. The results of studies on two sample systems using the program are presented. The results of the analytical approach have been compared with those obtained by a simulation method. A computer program to evaluate the mean values of the reliability indices of a radial distribution system has also been developed. An existing distribution system of Saskatchewan Power Corporation has been analyzed using the program. The results showing the effect of varying the values of various input parameters on the mean values of the reliability indices are presented in the thesis.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering