Article of the week
December 8, 2018 •
ARTICLE ARCHIVE, Article of the week, Insulators •
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About 20 million composite line insulators are already in service on HVAC overhead lines all over the world. Moreover, the growth in market penetration of this technology seems exponential. The first installations were in Germany in 1967, predominantly in areas of industrial pollution, and in the Netherlands in applications where there was coastal...
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November 25, 2018 •
ARTICLE ARCHIVE, Article of the week, HV/HP Testing, Testing
Several years ago, a HV cable termination operating in a Mediterranean country experienced catastrophic failure, scattering high velocity porcelain shards in all directions. The installation was next to a parking lot but fortunately the failure occurred when... Read More
October 12, 2018 •
ARTICLE ARCHIVE, Article of the week, Insulators
There are three proven insulator technologies being deployed in delivery of electrical power throughout the world. Porcelain and glass insulators have been used since the start and have had a very good record of performance and reliability. In fact, the... Read More
June 9, 2018 •
ARTICLE ARCHIVE, Article of the week, Utility Practice & Experience
In March 2011, problems of electrolytic corrosion on the caps of ceramic cap & pin insulator strings began appearing on the world’s first ±800 kV HVDC line, located in southern China. This line – known as Chu-Sui – runs across 1200 km of mostly... Read More
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... Read More
January 2, 2018 •
Article of the week, Utility Practice & Experience, Woodworth on Arresters
Given the possible application of line arresters to mitigate the effects of lightning, it strikes me as inexplicable that arresters are not being used more often to reduce momentary lightninginduced outages on transmission lines. I have asked experts to... Read More
December 22, 2017 •
ARTICLE ARCHIVE, Article of the week, HV/HP Testing
CIGRE Brochure 438 (2010) reviews systems to predict and monitor ice accretion on power networks and also discusses the different anti-icing and deicing methods currently available. These countermeasures are divided into both ‘active’ methods (such as... Read More
June 24, 2017 •
ARTICLE ARCHIVE, Article of the week, Insulators
Pollution flashovers of insulator strings have historically been one of the main causes of line outages under normal operating conditions. Indeed, years ago this was a relatively common occurrence across many countries suffering from heavy industrial... Read More
