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Utility Practice & Experience

Pre-Coating RTV Silicone onto Glass Disc Insulators

Pre-Coating RTV Silicone onto Glass Disc Insulators

April 14, 2018 • ARTICLE ARCHIVE, Glass, Silicone & Other Materials, Utility Practice & ExperienceComments (0)

Until recently, most applications of RTV silicone material have been as a remedial measure to mitigate pollution-related flashovers of insulators suffering poor service performance. Indeed, coatings have been viewed for years mainly as a maintenance product applied to substation insulators in polluted areas in place of greasing or washing. By contrast, in...

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Failure Triggered Insulator Replacement & Inspection Program at Chinese Power Utility

April 14, 2018 • ARTICLE ARCHIVE, Camera, Inspection, Utility Practice & Experience

A past issue of INMR featured the findings of a university research project into the mechanical failure of a 500 kV composite insulator in a relatively clean environment in central China. The finding here was that the failure, which did not show the...

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Innovations & Challenges in Insulator Design for UHV

April 7, 2018 • ARTICLE ARCHIVE, Insulators, Utility Practice & Experience

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...

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Emergency Repair for MV Networks

March 31, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Energias de Portugal-Distribuição, the main Portuguese DSO, has been working on best practice to restore power in emergency situations such as heavy storms and to minimize duration of resulting outages. As part of the last revision to EDP’s Operation Plan...

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Self-Driving Drones for Power Line Inspection

March 31, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Power line assets must be periodically inspected to ensure reliability and longevity. Since inspections with helicopter, foot patrol or tower climb are hazardous and expensive, unmanned aerial vehicles (UAVs) provide a safer and more efficient platform to...

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Modular HVDC System Interconnects Countries of Arabian Gulf

March 17, 2018 • ARTICLE ARCHIVE, Article of the week, Utility Practice & Experience

American inventor and ardent DC advocate, Thomas Edison, seems destined to have the last laugh. Progress in power electronics and insulation design over recent years have finally helped DC achieve major gains against AC systems which, despite Edison’s...

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Project to Develop & Implement Compact 400 kV Overhead Line

March 17, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The ongoing energy transition in Germany has aimed at increased integration of renewable energy into the electrical system and this has lead to new requirements to expand and adapt the country’s transmission system. At the same time, there is limited public...

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Advanced Methods to Enhance Safety & Increase Plant Reliability

March 10, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

While adequate product safety laws are in place for most consumer products, the situation is different in the case of manufacturers of medium and high voltage equipment. While most such products are covered by technical standards, hardly any focus on...

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