One of the effective strategies for increasing reliability of the distribution networks is to perform a faster fault localization. The common techniques for accelerating the process of finding the faults are based on application of fault locators and fault passage indicators. The goal of this study is to assess the performance of both techniques, either considered separately or in combination with each other. Since the performance of both concepts depends on various stochastic variables, a comprehensive assessment methodology developed in this paper is based on the non-sequential Monte Carlo simulation.
In this paper a methodology for determining proper number and positions of fault passage indicators (FPIs) in medium voltage distribution networks with installed fault locators (FLs) is proposed and discussed. The main goal is to achieve the techno-economic balance, by obtaining maximum improvement of the reliability indices while using the minimum number of FPIs. The method is verified by Monte Carlo simulation on a real combined urban/rural distribution network in Bosnia and Herzegovina. The purpose of the simulation tests is to assess performance of the proposed methodology, as well as to discuss the results and propose potential actions required to improve their reliability for several possible scenarios: the use of FLs only, the use of FPIs only and the combined use of FLs and FPIs.
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