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Utility Practice & Experience

Surge Protection of Substations

August 11, 2018 • ARTICLE ARCHIVE, Utility Practice & ExperienceComments Off on Surge Protection of Substations

Protecting substations from lightning and switching surges that lead to insulation flashover has been a key issue for as long as there have been power systems. While this need has remained constant over 100+ years, options on how best to mitigate high voltage stresses have changed quite substantially. This article, contributed by arrester expert Jonathan ...

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Self-Driving Drones for Power Line Inspection

August 11, 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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Hazards of Lightning on Power Lines

July 28, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

In many countries across the globe, lightning accounts for a large share of line tripping and is linked to both season and specific region. Based on the physical processes involved, lightning induced overvoltages fall into one of two broad categories: those...

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Meeting Modern Challenges in Asset Condition Monitoring & Diagnostics

Modern Challenges in Asset Condition Monitoring & Diagnostics

July 21, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Ensuring a high level of availability in supply of electrical power has traditionally been accomplished through sufficient system redundancy as well as specification of only well-proven and sometimes over-dimensioned network components. Intensive manpower and...

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Project to Develop & Implement Compact 400 kV Line

July 14, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The energy transition in Germany has been aiming at increased integration of renewable energy into the electrical system. 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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Resolving Problems from Poor Insulation Performance in Desert Environments

July 7, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

In heavily polluted areas of Oman or Eastern Saudi Arabia, operating experience has demonstrated that, even with 40 mm/kV creepage distance, ceramic fog type insulators do not offer satisfactory contamination performance and must be washed regularly to reduce...

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Managing Bird Damage to Utility Structures

June 29, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Most discussions relating to birds and power lines tend to focus either on bird mortality or on bird-induced outages. Past INMR articles on the topic, for example, have highlighted that the problem at distribution voltages is much different than on...

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Pole Designs Optimize Aesthetics, Feasibility & Cost

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

In many countries, construction of new HV and EHV overhead lines has triggered divisive public debate, with particular resistance against the use of traditional lattice towers. In the face of this, one way to promote greater acceptance and also minimize the...

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