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The development of new technologies and uses of electrical energy, such as distributed energy resources, pose new challenges and business opportunities for the electricity industry. In favor of making better use of information so that companies can efficiently manage their assets (minimizing investment and operating costs while improving service quality) and users rationally managing their demand (making efficient use of available energy resources). In this sense, Chile is experiencing a paradigm shift in the electricity sector, mainly seeking to improve energy efficiency. In this work, a survey of particularities and problems of the Electricity Distribution Systems is carried out so that these are considered as inputs in the Transmission Planning models used in Chile, specifically of the Zonal Transmission. [ABSTRACT FROM AUTHOR]

Copyright of Revista Técnica Energía is the property of Centro Nacional de Control de Energia CENACE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnura is the property of Tecnura and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this paper, a parameterization strategy of a k nearest neighbors (k-NN) based fault locator is described. This technique is complemented by a well validated location method based on the estimation of the fault impedance. This hybrid strategy is validated in a real power distribution feeder, having obtained acceptable results. Finally and as an important advantage of the here proponed methodology, it is remarkable the easy implementation process, considering real distribution feeders (more than 100 nodes). [ABSTRACT FROM AUTHOR]

Copyright of Ciencia e Ingenieria Neogranadina is the property of Ciencia e Ingenieria Neogranadina and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper presents a generalized strategy applied to perform the reduction of power distribution systems composed by several tapped feeders into equivalent radial feeders, as basic procedure required to the generalized implementation of impedance based fault location methods. The proposed strategy is tested using a fault location method, where it is shown a straightforward procedure to analyze the locations, and additionally the results shows errors lower than 3.5 % in the distance estimation for single line to ground, phase to phase, three phase faults. These results confirm the validity of the proposal. [ABSTRACT FROM AUTHOR]

A collaborative strategy for fault location in power distribution systems based on the fault impedance and the system signature, and using only single-end measurements, is presented in this paper. This strategy is useful to solve the multiple estimation of the faulted node, which is due to the presence of several laterals in the power system topology. According to the tests performed in a prototype power distribution system, considering single phase faults, phase to phase faults and three phase faults, and also using fault resistances from 0 to 40 Ω, the obtained results show an average absolute error of 5,2% approximately. From the results can be concluded that this proposal is efficient to locate faults in power distribution systems. [ABSTRACT FROM AUTHOR]

A recent and interesting study topic to utilities engineers and customers has been the electric power quality. The product itself and the customer support are the main aspects considered. The product quality means satisfy requirements of wave quality and service continuity. This last aspect is the one considered when the fault location problem is taken into account. This paper shows an analysis of a fault location method applied to power distribution systems, developed with a classifier based in support vectors machines. This fault locator is trained using fault data from nominal conditions and tested considering the influence of load variations. Also its capability to maintain high performance indexes where the power system is sub-divided in a increasing number of zones is checked. From an application example which uses a model taken from a real power system, it is shown how the proposed approach is highly effective to solve the problem, having mean precision scores above 90% to locate the faulted zone, in case of single phase faults to ground, which is the most difficult case proposed. [ABSTRACT FROM AUTHOR]

Many three-phase distribution feeders are unbalanced because, first, they serve their customers by means of single-phase distribution transformers; second, they use components which operate in single-phase manner; third, most of the failures that affect their components are single-phase. This important fact must be included in reliability studies because, as shown in this paper, when the contrary is assumed pessimistic assessments of the reliability indices are obtained which could lead to erroneous investment decisions. [ABSTRACT FROM AUTHOR]