Editorial Columns

Designing for Reliability or Resilience

August 11, 2018 • ARTICLE ARCHIVE, Commentary by Pigini

Projections on climate change confirm that power systems will be exposed to increasing threats of the type that jeopardize continuity and quality of supply. How best to respond to this evolving situation? Do we need to...

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Dielectric Strength & Air Density

July 21, 2018 • ARTICLE ARCHIVE, Commentary by Pigini

While a number of atmospheric parameters can affect the dielectric strength of external insulation, relative air density (δ) and absolute humidity are...

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‘Externalities’ of Overhead Power Lines

July 21, 2018 • ARTICLE ARCHIVE, Commentary by Pigini

Public opposition and growing environmental awareness now make identifying corridors for new overhead lines an increasingly complex process – especially near...

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Protecting Composite Insulators from Corona

July 14, 2018 • ARTICLE ARCHIVE, Corona, Insulators, Reporting from CIGRE

One of the important design differences between silicone composite insulators and porcelain cap & pin or long rod types is their smaller shank diameter,...

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Composite Insulators for DC

June 28, 2018 • ARTICLE ARCHIVE, Commentary by Pigini

The world’s first DC lines were equipped with basically the same ceramic insulators used for AC. However, experience showed that, after only several years of...

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Testing to Deal with Future Hybrid Grids

June 22, 2018 • ARTICLE ARCHIVE, From the World of Testing, Testing

Many in our industry predict the future will bring greater blending of technology and hybridization. But what does hybridization mean in power systems? And...

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Corona Shielding for HVDC Line Insulators

June 16, 2018 • ARTICLE ARCHIVE, Commentary by Pigini, Corona

Power utilities and insulator manufacturers continue to express differing views as to the relative value of shielding electrodes in DC. Back in 1972,...

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Revising IEC 60815

June 9, 2018 • ARTICLE ARCHIVE, Commentary by Pigini, Editorial Columns

Specifications contained in IEC 60815 “Selection and dimensioning of high-voltage insulators intended for use in polluted conditions” are the result of...

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