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Kankanala P.,Public Service Electrical and Gas Company | Pahwa A.,Kansas State University | Das S.,Kansas State University
IFAC-PapersOnLine | Year: 2015

Faults on overhead distribution feeders have significant impact on the distribution reliability. Literature review on outages shows that overhead lines are highly susceptible to environmental factors such as weather, trees and animal. Historical analysis of outage data recorded by utility in Kansas showed that the occurrences of animal-caused outages are dependent on weather conditions and time of the year. This paper proposes models based on neural network combined with boosting algorithms based on AdaBoost to estimate weekly animal-related outages. Effectiveness of the proposed models is evaluated using actual data for four cities of different sizes in Kansas. Performance of the proposed models are compared with each other and with neural network without boosting, and previously implemented models. The results clearly show that boosting reduces mean square error and mean absolute error, and increases correlation between the estimated outages and observed outages. Additionally, AdaBoost+ performs better than AdaBoost.RT with lower errors and higher correlations. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved. Source


Bokhari A.,New York University | Alkan A.,New York University | Dogan R.,New York University | Diaz-Aguilo M.,New York University | And 6 more authors.
IEEE Transactions on Power Delivery | Year: 2014

This paper presents the experimental determination of the ZIP coefficients model to represent (static) modern loads under varying voltage conditions. ZIP are the coefficients of a load model comprised of constant impedance Z, constant current I, and constant power P loads. A ZIP coefficient load model is used to represent power consumed by a load as a function of voltage. A series of surveys was performed on typical residential, commercial, and industrial customers in New York City. Household appliances and industrial equipment found in the different locations were tested in the laboratory by varying the voltage from 1.1-p.u. voltage to 0 and back to 1.1 pu in steps of 3 V to obtain the individual P-V, Q-V, and I-V characteristics. Customer load tables were built using seasonal factors and duty cycles to form weighted contributions for each device in every customer class. The loads found in several residential classes were assembled and tested in the lab. It was found that modern appliances behave quite differently than older appliances even from only 10 years back. Models of the different customer classes were validated against actual recordings of load variations under voltage reduction. © 1986-2012 IEEE. Source


Ragula G.,Public Service Electrical and Gas Company
29th International No-Dig Conference and Exhibition 2011, NO-DIG BERLIN 2011 | Year: 2011

Rehabilitating natural gas mains in North America using CIPP lining technology is not considered to be a new practice by several major utilities. Surprisingly enough, this trenchless renewal technique is not necessarily one that has been universally adopted as standard practice in North America. Over the years, various lining technologies have been imported for use from overseas locations, yet the North American industry market has been somewhat elusive and has not become as saturated as one might expect. Variations in urban environments and population densities, design and installation standards; as well as gas utility operational philosophies and procedures are all factors that will play a distinct role with the potential growth of this proven rehabilitation technology in North America. From a gas utility perspective, this paper will explore the reasons for current limited use of this rehabilitation technology that has been used since 1992 and will review concepts that the author believes will ultimately lead to expanded usage in North America. Source


Ragula G.,Public Service Electrical and Gas Company
Proceedings of the American Gas Association, Operating Section | Year: 2014

A discussion covers pipe splitting; static pipe bursting; pipe splitting in natural gas mains; service line replacement growth; prototype equipment evaluation; results on telescoping issues, exposed cable safety concern, and mechanical fittings; and conclusion sand recommendations. This is an abstract of a paper presented at the 2014 AGA Operations Conference Proceedings (Pittsburgh, PA 5/20-23/2014). Source


Trademark
PUBLIC SERVICE Electrical AND GAS COMPANY | Date: 1984-02-27

COMPUTER PROGRAMS AND BAR CODE READERS USED IN UTILITY METER OPERATIONS.

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