Utility Practice & Experience

Tropical Paradise, Yes but Not for Overhead Distribution

December 15, 2018 • ARTICLE ARCHIVE, Utility Practice & ExperienceComments (0)

This picturesque, palm-filled scene from southern Thailand conveys a sense of nothing but serene, natural beauty. Yet, lurking hidden in this same image are some of the most important stresses that adversely impact overhead distribution – coastal pollution, high humidity, frequent lightning, intense solar radiation, abundant wildlife and, sadly,...

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Innovations & Challenges in Insulator Design for UHV

December 8, 2018 • ARTICLE ARCHIVE, Insulators, Utility Practice & Experience

Among the challenges when it comes to insulator design for UHV applications is to fulfil required lengths while also mitigating resulting negative effects on insulation and mechanical performance. Efforts can be made in system design to reduce levels of... Read More

Pre-Coating RTV Silicone onto Glass Disc Insulators

November 24, 2018 • ARTICLE ARCHIVE, Glass, Silicone & Other Materials, Utility Practice & Experience

Most application of RTV silicone material has traditionally been as a remedial measure to mitigate pollution-related flashovers of insulators suffering poor service performance. Indeed, coatings have been viewed for years mainly as a maintenance product... Read More

Urban Substation Project Part of Power Grid Refurbishment in Mexico City

Urban Substation Project Part of Power Grid Refurbishment in Mexico City

November 17, 2018 • ARTICLE ARCHIVE, Substation, Utility Practice & Experience

As elsewhere in North America and across many countries in Europe, much of the power infrastructure in Mexico is nearing 50 years and in need of modernization. This is particularly true for the country’s capital, Mexico City, a bustling metropolis that is... Read More

Classifying Pollution Severity for HVAC & HVDC in China

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

Beginning in the 1970s, the Chinese power system experienced a growing number of massive outages triggered by pollution flashover. In fact, between the mid 1980s and 2006 alone, there were 44 large-scale outages linked to progressively worsening air quality... Read More

Bosnian Utility Implemented Program to Monitor Condition of Station Arresters

November 10, 2018 • Arresters, ARTICLE ARCHIVE, Utility Practice & Experience

To protect expensive assets at its substations, Elektroprenos BiH – the company operating the power system in Bosnia and Herzegovina – began installing metal oxide (MO) surge arresters in each of its HV transformer bays about 20 years ago. Over the years... Read More

Substation Surge Protection

November 3, 2018 • ARTICLE ARCHIVE, Substation, Utility Practice & Experience

Protecting substations from lightning and switching surges that lead to insulation flashover has been a key issue for as long as there have been power systems. While this need has remained constant over 100+ years, options on how best to mitigate high voltage... Read More

Approach & Case Studies of Insulator Dimensioning for AC to DC Line Conversion

November 3, 2018 • ARTICLE ARCHIVE, Utility Practice & Experience

Increasing market integration between countries and introduction of renewable energy sources on a larger scale has resulted in a growing demand for enhanced capacity in transmission systems. As a consequence, utilities are presently uprating or building new... Read More

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