Public Service Electrical and Gas Company

Newark, NJ, United States

Public Service Electrical and Gas Company

Newark, NJ, United States
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Ragula G.,Public Service Electrical and Gas Company
Proceedings of the American Gas Association, Operating Section | Year: 2015

This presentation highlights the ongoing trenchless advancements in the gas industry for further cost reduction, increase system assessment and equipment reliability, as well as further reduction of the amount digging required for the less trench option. Several trenchless technologies, including using gyroscopes for pipeline tracking, horizontal intersect drilling, extended reach crossing, crossbore mitigation, and service pipe splitting, are described.

Wernsing R.,Public Service Electrical and Gas Company | Hubertus J.,Public Service Electrical and Gas Company | Duffy M.,Public Service Electrical and Gas Company | Hataway G.,PowerSouth Energy Cooperative | And 2 more authors.
IEEE Industry Applications Magazine | Year: 2012

Public Service Electric and Gas Company (PSE&G), Newark, New Jersey, has implemented advanced loop scheme (ALS) builds on its standard distribution scheme to improve its reliability indices. During the design phase of the scheme, emphasis was placed on maintaining traditional safety and operational practices while looking for opportunities to improve operation, along with high-speed network reconfiguration functionality. The feeders chosen for the initial installation of the new ALS were selected so that the anticipated dramatic improvement in reliability would be evident in a short time frame. With the blocking scheme in place, the scheme is made selective so that proper coordination between protective devices is achieved, and only the proper line section for the fault is isolated. The scheme performs for faults involving multiple phases, and for single-phase faults the scheme only opens the recloser pole corresponding to the affected phase on the initial trip by the initiating recloser.

Wernsing R.,Public Service Electrical and Gas Company | Hubertus J.,Public Service Electrical and Gas Company | Duffy M.,Public Service Electrical and Gas Company | Conner D.,Schweitzer Engineering Laboratories | Nelson E.,Schweitzer Engineering Laboratories
Papers Presented at the Annual Conference - Rural Electric Power Conference | Year: 2010

With the ever-increasing importance of electricity, excellent service reliability is no longer a luxury in the eyes of consumers but an expectation. In response to this expectation, Public Service Electric and Gas Company (PSE&G) is making a significant investment in a new technology to help improve reliability. This new technology has resulted in an automated feeder reconfiguration scheme that not only minimizes the duration of an outage due to a fault and the number of customers impacted by it but also reduces the number of customers experiencing a blink and subsequent switching. PSE&G has implemented an innovative solution designed to improve their reliability indices. The advanced loop scheme (ALS) builds on the PSE&G standard distribution scheme that used a normally open tie to separate two feeders. The original scheme offered automatic reconfiguration but was inherently slow and subjected customers to unnecessary blinks during reconfiguration. The new scheme uses a closebefore- open methodology in which the tie is closed before sectionalizing is done. Because of this manner of operation, customers on unfaulted line sections are not exposed to an outage for the fault or the switching performed to isolate the faulted line section. Additionally, with communication comes the ability to simplify coordination and apply transmission protection principles to improve protection and increase the density of protective devices along the feeders, thus reducing the number of customers per section. This paper examines the design and implementation of the ALS. It gives specific settings and operational details of the scheme. Additionally, a review of the operational history highlights the impact that the scheme has had on the reliability of the utility distribution network. © 2010 IEEE.

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.

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.

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.

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).

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