Comparing Maintenance of New Transmission Structures with Traditional Lattice Towers

June 10, 2017 • ARTICLE ARCHIVE, MaintenanceComments (0)

Grid operators worldwide have been under growing pressure to make power structures more aesthetic as one of the most effective ways to help assure public acceptance of new projects. However, line design using monopole towers can also positively impact several aspects of normal maintenance procedures. This edited contribution by Mette Mikkelsen of Danish...

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Reduce Wildlife Outages at Distribution Substation

Protective Devices Installed to Reduce Wildlife Outages at Distribution Substation

June 10, 2017 • ARTICLE ARCHIVE, Article of the week, Maintenance, Wildlife Protection

Among the most vulnerable links in any power network are the points of interaction between live equipment and wildlife – from birds to scavenging carnivores. Taken together, these creatures present a constant threat to the safe operation of network assets....

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Comparing UV & IR Diagnostic Inspection of Lines & Substations

June 3, 2017 • ARTICLE ARCHIVE, Corona, Inspection, IR, Maintenance, UV

One of the issues in maintenance of overhead lines and substations relates to better understanding what is being revealed during ultraviolet or infrared inspections of equipment and hardware. Do these two technologies highlight the same problem or are they...

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Comparison of Methodologies to Detect Damaged Composite Insulators

May 27, 2017 • ARTICLE ARCHIVE, Maintenance

As the rate of application of composite insulators on overhead lines has spiralled in recent years, accurate methods to monitor them for critical damage (especially internal defects) have taken on prime importance. Apart from the obvious impact on reliability...

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Detecting Composite Insulator Designs Susceptible to Brittle Fracture

April 29, 2017 • ARTICLE ARCHIVE, Insulators, Maintenance

The population of composite insulators in medium and high voltage grids worldwide is growing constantly. As numbers of these insulators increase, so do cases of failure. In HV networks, a sudden and serious failure mode called brittle facture has occurred...

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Insulator Failures on 400 kV Lines Highlighted Importance of Corona Rings

March 25, 2017 • ARTICLE ARCHIVE, Corona, Maintenance

It is well known that composite insulators used at transmission voltages have to be equipped with corona rings to reduce the risk of erosion to their polymeric housings. Yet, one still finds cases where such insulators are either installed without rings or...

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Corona Camera Supplier Extends Product Range

March 4, 2017 • ARTICLE ARCHIVE, Corona, Maintenance

Mitigating the presence and impact of corona on overhead lines and at substations is among the important tasks confronting power system operators. The reason for this is that, if left unchecked, corona can lead to a variety of problems, including progressive...

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Thermal Inspections Help Florida Utility Prioritize Maintenance at Substations

February 11, 2017 • ARTICLE ARCHIVE, Inspection, Maintenance

Among the best known technologies to assess the condition of power network assets are infrared and ultraviolet imaging. Both have been used now for decades and rely on specialized cameras that have evolved considerably over the years. The common direction of...

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