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Utility Practice & Experience

Australian Substation Focused on Environmentally-Sensitive Design

February 17, 2018 • ARTICLE ARCHIVE, Utility Practice & ExperienceComments Off on Australian Substation Focused on Environmentally-Sensitive Design

One of the important trends in design of new overhead lines over the past 20 years has been development of structures and designs that are less obtrusive and more pleasing visually. Much the same process has also been going on at substations. For example, even 25 years ago, efforts had already been in place as ...

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Wireless Leakage Current Monitors to Improve Network Performance

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

As part of a program to provide an infrastructure for transmission line and substation monitoring, EPRI in the U.S. has been developing remote sensors to monitor the condition of important assets. This INMR article from 2015, contributed by Andrew J. Phillips...

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Cross-section made to insulator removed from tower No. 141.

Challenges in Asset Condition Monitoring & Diagnostics

February 2, 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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Unique Tower Served As Early Model for Compact Line Design

January 26, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The May-June of INMR back in 2002 (Vol. 10, #3) contained an article about a compact 420 kV tower developed in the Nordic countries of Europe. These days, as power supply companies examine all the alternatives to upgrade existing lines or build new...

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Utilities Chose RTV-Coated Glass Insulators to Resolve Problems in Polluted Environments

January 22, 2018 • ARTICLE ARCHIVE, Glass, Utility Practice & Experience

These days, it is generally accepted that transmission lines passing through areas of heavy pollution, particularly marine pollution, should ideally employ composite insulators. Prevailing wisdom is that this type of insulation offers the best performance...

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Insulation Aspects When Converting Transmission Lines from AC to DC

January 13, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

The ongoing expansion of wind power is placing growing demands on the dynamic capacity of transmission systems and utilities are therefore looking closely at how their existing lines can be utilized more efficiently. In this regard, one attractive way of...

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Evaluating Composite Transmission Insulators After 15 Years Service at High Altitude

January 13, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Many transmission lines across the globe operate at high altitude under conditions of low air pressure and relatively thin air. It is well known that voltage decreases with altitude, whether air gap discharge voltage, conductor corona inception voltage or...

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Ice Storm in North America

January 6, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

This week, 20 years ago, was marked by one of the most massive power outages in North American history. Much on the North-East was affected but especially the Canadian Province of Québec, where hundreds of transmission structures toppled. With similar...

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