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Editorial Columns

Preview of CIGRE 2018 General Session

June 22, 2018 • ARTICLE ARCHIVE, Reporting from CIGRE

A review of the program for the upcoming CIGRE General Session in Paris suggests record attendance, with more than 8000 participants expected from 93 countries. In addition, some 240 exhibitors will display new...

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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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Testing Can Reduce Transformer Failures

June 2, 2018 • From the World of Testing, Testing

Failure of a large power transformer is probably the worst nightmare scenario faced by a transmission system operator. Repercussions can be enormous. First is...

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Progress in Standardizing Recommended Creepage in DC

June 1, 2018 • ARTICLE ARCHIVE, Editorial Columns, Reporting from CIGRE, Transmission Structures

Today’s demand for integrating renewables into energy supply has made HVDC transmission an interesting option. This is triggered by factors such as that HVDC...

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Dielectric Strength & Air Density

May 19, 2018 • ARTICLE ARCHIVE, Commentary by Pigini

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

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Application of Composite Insulators to HVDC Systems

Application of Composite Insulators to HVDC Systems

May 19, 2018 • ARTICLE ARCHIVE, Commentary by Pigini, Editorial Columns

As is long known, the design of insulation for DC transmission is much more demanding than for AC, particularly from the standpoint of pollution performance....

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