Utility Practice & Experience

Innovations & Challenges in Insulator Design for UHV

October 5, 2018 • ARTICLE ARCHIVE, Insulators, Utility Practice & ExperienceComments Off on Innovations & Challenges in Insulator Design for UHV

Among the challenges when it comes to insulator design for UHV applications is to fulfil required lengths while also mitigating resulting negative effects on insulation and mechanical performance. Efforts can be made in system design to reduce levels of switching overvoltages. Similarly, creepage distances can be decreased through selection of insulators...

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Applying RTV Silicone Coatings to Restore Degraded Composite Housings

October 5, 2018 • ARTICLE ARCHIVE, Housing, Utility Practice & Experience

Since the early 1990s there has been growing application of composite-housed HV apparatus at substations. This has particularly been the case for instrument transformers where the safe failure mode of a silicone housing compared to porcelain is seen as a... Read More

Substation Changed CT Technology to Resolve Problems of Oil Leaks

September 29, 2018 • ARTICLE ARCHIVE, Substation, Utility Practice & Experience

Oil leaking from current transformers presents a problem not only from the obvious maintenance perspective but also in terms of environmental impact. One Chinese power utility faced with exactly such a situation at one of its important substations has chosen... Read More

Portuguese Utility Aims to Enhance Green Image & Reliability KPIs

September 22, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

This past May marked a milestone for Energias de Portugal (EDP) as the entire country kept its lights on for four consecutive days using only electricity generated by wind, hydraulic, biomass and solar power. This was apparently a first in Europe, if not the... Read More

Investigating Failures Contributes to More Reliable Grids

September 15, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The Netherlands has among the most reliable power systems in the world, with average customer availability of 99.999%. Yet, as impressive as this statistic is, the country has still experienced major power disruptions that also carried global ramifications.... Read More

Canadian Utility Undertook Trial Evaluation of Composite Transmission Poles

September 9, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Wood pole framing is common on transmission networks throughout North America and indeed across the globe. However, while the typical service life of such poles is normally between 50 and 60 years, damage caused by various species of woodpeckers has, in... Read More

Application of Composite Interphase Spacers to Prevent Conductor Galloping

September 8, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The use of composite insulators on transmission lines has increased steadily in recent years due to their well-known performance advantages as well as their lower acquisition and life cycle costs. At the same time, these insulators have also offered solutions... Read More

Lightning’s Impact on Florida’s Power Network

September 3, 2018 • Utility Practice & Experience

The Florida Power & Light (FPL) service territory encompasses some 27,000 square miles, generally along the coast of Florida and serving about 5 million customers. The Distribution Business Unit (23 kV and below) is responsible for more than 1 million... Read More

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