Utility Practice & Experience

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Materials Toward Development of Insulators of the Future

Among the goals of power systems these days is that a growing share of energy be supplied from renewable sources. At the same time, power systems have to become more controllable to optimize power flow and reduce losses. The classical power system must... Read More

MOV Protection of Series Capacitor Banks

Series capacitor banks serve the purpose of increasing power flow on an existing power system by reducing line impedance and basically consist of capacitors as well as their protective system. Their application dates back to 1928 when the first such bank –... Read More

Asset Condition Monitoring & Diagnostics

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... Read More

Application Experience with Transmission Line Arresters

The 400 kV Gutinas-Brasov overhead line is located in a mountainous area of Romania that has mostly rocky soil. Thick ice covers conductors during winter and long ago had caused breakage of shield wire to the extent that it had to be dismantled in the most... Read More

Innovations & Challenges in Insulator Design for UHV

Among the challenges in insulator design for UHV applications is to fulfil required lengths while also mitigating resulting negative effects on insulation and mechanical performance. Insulators are offered today in a range of different materials and... Read More

Development of Polymeric Insulation for Today’s Network Requirements

Composite insulators are now the dominant type selected for overhead line applications worldwide and growing rapidly in application at substations as well. But this development did not happen ‘overnight’. In fact, some five decades of service experience... Read More

Innovative Tower Solutions & Line Uprating

The advent of composite insulators began during the 1950s, first in the U.S. and soon after in Germany and France. User acceptance was slow at the start and these products went through the ‘teething’ problems common to most technological innovations.... Read More

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