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.
In this paper, modelling and measurement of resonant overvoltages in wind turbine step-up transformers is presented. A failed 2.7 MVA, 0.690 / 33 kV step-up transformer with the MV side consisting of delta connected layer windings and the LV side consisting of star connected foil windings is presented as a case study. The failed transformer showed substantial damage in the first and second layer of...
the installation of medium voltage transformers in wind turbines motivates the wind turbine manufacture, operators and researchers to review the challenges of insulation failure owing to overvoltages. Among these overvoltages, internal resonant overvoltages are most crucial and destructive. One of the protective measures, which decrease the potential of internal resonances, is the selection of appropriate...
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.