The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The insulation system of modern power transformers is a complex set-up. Design engineers have to cope with several different requirements, which are often diametrical. One of such requirements is a ruggedness design in terms of electrostatic charging tendency (ECT). In the 1970's and 80's several problems have been reported in literature and countermeasures have been developed. However, recently there...
When voltage upgrading, lightning-, switching- ice-and pollution performance of the insulators and airgaps in the overhead line play a very important role. The dimensioning procedure is different and technically more challenging from the one used for new lines. Amongst others, the margins available in voltage upgrading are much smaller and therefore the engineering needs to be done more precise. To...
The majority of electrical generators in wave and tidal power plants are face harsh environmental conditions. Particularly the seals between the moving shaft and the stationary generator as these are mechanically stressed under pressure of the sea water. Flooding the electrical generator and the air gap respectively is a possible solution that would overcome seal failure. With this proposal, the strains...
For the majority of proposed wave- and tidal current-driven power generation applications, the electrical generators are submerged in sea water, frequently at many metres of depth. The environment places significant stress on the rotating or translating seals between the driven shaft and the electrical generator leading to reduced reliability and lifetime. A potential solution is to eliminate the...
Electrical power transmission is dominated by overhead line systems at present. This is mainly based on more than hundred years of experience of utilities in running overhead lines. Furthermore, overhead lines have proven their operational reliability and functional assurance. In the past, cables were used in distribution networks in urban areas for the most part with the exception of direct current...
To ensure economic operation of high voltage equipment, reliable condition evaluation concepts are essential. They enable long-term inspection strategies with regard to a maximized service life of each component. Condition based maintenance (CBM) is therefore desirable and it is already used more and more in practice. Monitoring and diagnostic systems are on the way to get important tools for modern...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.