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This paper presents a study of the repair process performed in five Colombian power distribution systems using queuing theory concepts. It represents the input and service processes of the queuing system by means of stochastic point process models and assesses the repair process performance indexes applying a procedure of sequential Monte Carlo simulation. Results shows: i. The power law stochastic...
Reliability of distribution systems is an important issue in power engineering for both utilities and customers. Power distribution reliability is closely related to individual component reliability. In this paper, the reliability as measured by certain count indices, mainly the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI), is quantified...
This paper presents an approach to prioritize maintenance tasks in power distribution system based on reliability models. This approach define weighted average system reliability index WASRI employing reliability indices SAIFI, SAIDI, MAIFI and interruption cost, which reflecting failure cost of specific component. The benefit of maintenance task is defined as improvement of WASRI. This approach ranks...
Reliability calculation is the most important concern in designing and planning of distribution systems, which is considered, in terms of the economical concerns, with minimal interruption of customers. Storage devices are usually used for storing the electric energy while the electric price is low, and deliver their reserved energy when it has financial profit. Also, it could be effective for decreasing...
This paper proposes the method to predict a reliability index of power distribution feeders in the central area of Provincial Electricity Authority (PEA) of Thailand. Using the Weibull distribution, the time to failure data during 2002 2009 is analyzed over moving 4-year periods to determine the failure rates associated with protective devices (Breakers, Reclosers and Fuses). The next year failure...
We realized a reliability study of electrical network with decentralized production in using Markov process. The reliability index takes into account the availability of the decentralized production, the ability to provide electricity to users of the network branch and of the probability of a damage starting. The Markov graphs are used to model Medium Voltage branches with connected wind turbines...
A new method for reliability assessment and performance based incentives of power distribution systems is presented. The reliability estimation is based on a Monte-Carlo simulation of the system average interruption duration index (SAIDI). The normal distribution resulting from the simulation is used as a base for a performance based incentives scheme. In order to create an applicable model for supervisory...
Maintenance managers of today's electrical distribution systems are faced with the problem of where their maintenance resources will be utilized best. In previous work the authors have developed a method for maintenance policy optimization for electrical networks. This paper presents results from an application study performed for a distribution system, including both urban and rural parts, for this...
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