RELIABILITY ANALYSIS OF POWER DISTRIBUTION NETWORK (original) (raw)
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Reliability Analysis of Distribution System using ETAP
Reliable and stable electric power supply is prerequisite for economic, technological and social growth of any country. Thus, utility companies around the globe ensure that every customer in system must be supplied the energy they required. It is now recognized fact that almost 90 % of electricity interruptions are due to malfunctions in electric distribution system. Distribution system is composed of different components. Not only failure rates of these components contributes to interruptions but also physical stresses created by foul weather conditions significantly impacts reliability of distribution system. In this research work reliability of electric distribution system is analyzed. The reliability of load points in distribution system decrease as distance from feeder increase, evaluation of system indices depicts reliability of whole system in a more understandable way. These analyses are executed on Roy Billinton Test System (RBTS) bus 2, which is modeled and evaluated in Electrical Transient and Analysis Program (ETAP).
Distribution System Reliability Analysis using ETAP
2014
With recent advents in technology, efficient utilization of resources is now a need for secure and reliable electrical power distribution system. For the concern of both customers and power utilities, reliability is a major issue for power distribution system. In this paper, reliability of distribution side is assessed using ETAP software with various scenarios viz. consideration of lateral distributor protection and passive failure rate of components and large impact of distributed generations. The improvement in reliability in various cases has been evaluated on the basis of various reliability indices such as load point indices and system indices. The variation of indices has been followed with various different cases. The usefulness of this work is analysis of reliability, security and efficient operation of electrical distribution system. The analysis is performed on Roy Billinton Test System (RBTS) using Electrical Transient Analyzer Program (ETAP).
Distribution System Reliability : An Overview
2015
From the survey of previously published papers, it is found that most of work is done on the generation and transmission side reliability, whereas little work is done on distribution system reliability and Indices under deregulated environment. In reliability study of distribution system development of accurate and consistent models to represent system behavior is always a main concern to researchers. A computer program which provides system representation for the evaluation of substation and switching station reliability performance in terms of outage frequencies and duration is needed. It performs failure modes and effects analysis and provides a concise and orderly description of various combinations of occurrences within the system that could result in an interruption and is applied to practical systems. The effects of different component failure modes, normally open breakers or switches, unrealistic protective system etc. must include in reliability predictions. In this paper a...
International journal of engineering research and technology, 2020
In the presence time the electrical power demand growth is increasing rapidly with the development of the technology and also the electrical power system is set to meet the required demand of customers .However the reliability of the power system is the major challenge to meet the required demand of customers.in Ethiopia a numbers of customers rise complain to Ethiopia electric power utility because of the power interruption. Therefore reliability analysis of distribution powers system is important to determine how much the power interruption is affecting the customers. This is enabling to the Power Company and customers to seek better solution to improve the reliability of the power system typically the maychew distribution system. This paper analysis the reliability of maychew city distribution system using the analytical method based on the outage data gotten from the northern Region electric power utility office. The monthly reliability of 5 feeders was evaluated for 2011E/C. Fr...
Reliability Analysis of Power Distribution System
Journal of Electrical Technology UMY
Electrical distribution system is a component of electrical power system that is very important because it is closest to the customer. In its operation, the distribution system often suffers that causes the flow of electricity to the customer is interrupted. This situation is not expected by customers or by electric power companies. The more frequent and longer the occurrence of electrical power flow interruption, the lower the system reliability, and vice versa. Reliability of a distribution system can be analyzed based on SAIDI and SAIFI parameters. In this research, reliability analysis of distribution system on Gejayan substation. The analysis result using SAIDI and SAIFI parameters shows that Gejayan substation is reliable enough to national standard, while based on international standard still not reliable.
Distribution Reliability Analysis Program
The objective of this paper is to present a computer program developed for Windows to compute reliability indices for different customers and set of customers served by the same distribution feeder. This program deals with information obtained directly from utility database to create an equivalent network modeling and run contingency analytical simulations. The system's average failure rates must be informed by the user, based on historical utility data, manufacturer test data or typical values. The program enables to compute penalties and annual costs of energy interruptions and compare the obtained indices with the reliability index targets set by the national regulatory agency (ANEEL) for the different sets of customen and distribution feeders under analysis The program allows to analyze changes in the system rates indicators and reliability index targets for each set of customers and expressions for the calculation of penalties in the event of violations of these targets. In order to meet the targets set by the regulatory agency, most distribution utilities began to register digitally their lines, equipment and history of interruptions, thus making it easier to develop computational programs and tools for analysis of power flow, short circuit and reliability of the distribution systems. Two different analyses are used to assess the reliability of the distribution systems: Historic and Predictive. Through the historic analysis, one can obtain the indices refemng to the interruptions occurred in the system for a given period of time, generating diagnoses of the system's past behavior. While the predictive analysis calculates the future expectation and in the topology of the electrical network and, thus, to carry of the system's behavior in the medium and long terms, out a sensitive study to verify the effect of some different justifying investments that can improve the reliability, the power quality, and reduce costs of energy interruption and other related costs. the components failure the repair juration, protection device schemas and distribution line sections. Considering that these factors are random, by nature, it is protection equipment and changes in the topology ofthe systems, switching duration, for restoring the reliability for different
International Journal of Engineering Research and Technology (IJERT), 2020
https://www.ijert.org/reliability-assessment-of-electrical-distribution-network-using-analytical-method-a-case-study-of-maychew-city-distribution-system https://www.ijert.org/research/reliability-assessment-of-electrical-distribution-network-using-analytical-method-a-case-study-of-maychew-city-distribution-system-IJERTV9IS080075.pdf In the presence time the electrical power demand growth is increasing rapidly with the development of the technology and also the electrical power system is set to meet the required demand of customers .However the reliability of the power system is the major challenge to meet the required demand of customers.in Ethiopia a numbers of customers rise complain to Ethiopia electric power utility because of the power interruption. Therefore reliability analysis of distribution powers system is important to determine how much the power interruption is affecting the customers. This is enabling to the Power Company and customers to seek better solution to improve the reliability of the power system typically the maychew distribution system. This paper analysis the reliability of maychew city distribution system using the analytical method based on the outage data gotten from the northern Region electric power utility office. The monthly reliability of 5 feeders was evaluated for 2011E/C. From the evaluation the average availability of the ADISH, MAYCHEW, NEKSEGE, particle board factory and raya brewery factory were. The distribution experiences numbers of daily outage due to the fault. Generally I have conclude the distribution have poor performance.
Journal of Informatics Electrical and Electronics Engineering (JIEEE), A2Z Journals, 2020
Electric power delivers a predicable per condition for the technological, economic and political development of any countries and it is vital for each individual. Power outage is serious problem in Ethiopia at the whole of distribution network. This is due to most interruptions are frequently and much time service restoration, that is why most customers of Ethiopia their day to day activities highly affected and they are strongly complain to Ethiopia electric utility. But this power outage affected the cost of customer and Ethiopian utility. Power system is to provide an adequate and security electrical addressing to its demands as economically as alternative with reasonable level of reliability. Most electrical power distribution system reliability is one of the major issues for the demands. Reliability is the chance that a network or components done their assigned task for a given period of time under the working time stumbled upon during its anticipated lifetime. Most of developing country including Ethiopia electric power distribution network has received considerably less of the attention to reliability designing and evaluation than have generating and transmitting systems. Now a day life is directly or indirectly depends on electric power so that utility should deliver reliable power every day for 24 hours and each year for 8760 hours to satisfy human needs and to perform their works as much as possible with less economy
Mathematical Problems in Engineering, 2013
This paper presents an algorithm for estimating the performance of high-power station systems connected in series, parallel, and mixed series-parallel with collective factor failures caused by any part of the system equipment. Failures that occur frequently can induce a selective effect, which means that the failures generated from different equipment parts can cause failures in various subsets of the system elements. The objectives of this study are to increase the lifetime of the station and reduce sudden station failures. The case study data was collected from an electricity distribution company in Baghdad, Iraq. Data analysis was performed using the most valid distribution of the Weibull distribution with scale parameterα= 1.3137 and shape parameterβ= 94.618. Our analysis revealed that the reliability value decreased by 2.82% in 30 days. The highest critical value was obtained for components T1, CBF5, CBF7, CBF8, CBF9, and CBF10and must be changed by a new item as soon as possib...
Modeling of Simultaneous Fault to Reliability Enhancement in Distribution System
2015
The main purpose of an electric power system is to provide electricity from the generation source to the customer point. Security and adequacy are the two most important requirements in power system reliability. As most of the faults that happen in a distribution network are experienced by the customers, improving the security of the distribution side can have a beneficial effect on the entire network. Faults can occur singly, but multiple faults can occur at the same time in many different places in the network. It is these simultaneous faults that can drastically affect the security of a network, and directly decrease its reliability. This paper studied the modelling of simultaneous faults by using the Monte-Carlo (MC) algorithm in a distribution network. This makes it possible to evaluate the effect of the repair time in different situations, and also to model various solutions to enhance the reliability of the network. A real overhead line feeder in a distribution network from a...