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 switching overvoltages. Similarly, creepage distances can be decreased through selection of insulators...
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, several utilities in Europe and elsewhere have... Read More
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... Read More
Statnett, the TSO in Norway, has reinforced the electrical transmission grid in the country’s southwest due to a new HVDC submarine cable connection to Germany. The project consisted of 250 km of new transmission lines, voltage upgrading of 60 km of... Read More
There is a relationship between trendy terms such as ‘renewables’ as well as ‘smart grids’ and electrical insulators, which most people view as just another piece of hardware in a power system. In the interests of protecting the environment and... Read More
A decade ago, CEPS, the Transmission System Operator in the Czech Republic, faced the need to increase the longitudinal profiles of several overhead transmission lines. The goal was to increase phase-to-earth clearances at critical locations with the ultimate... Read More
The past two decades have seen the marketplace for high voltage porcelain insulators impacted by intense global competition as well as a serious challenge from hollow core composite technology. At the same time, the growing number of HVDC and UHV AC and DC... Read More
One of the most important parameters for composite insulators is hydrophobicity, allowing superior insulation performance compared to ceramic cap & pin strings. However, these initial hydrophobic properties can deteriorate in service if there is... Read More