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.
TEV (transient enclosure voltage), with large amplitude and high frequency, which affect the normal operation of the GIS secondary equipment. This paper is based on the theory of multi-conductor transmission line. The coupled relationship among three phases was decoupled by means of phase-mode transformation method, thus the enclosure transmission characteristic model of GIS is established. On the...
High temperature can cause many problems in OIP transformer bushing, such as aging of insulation and partial discharge, which will obviously reduce the lifetime of bushing. This contribution calculates the total loss in bushing under both voltage and current loads using the finite elements method(FEM) and then obtains the temperature distribution though the finite volume method (FVM). Computation...
Fourier transform are used on the very fast transient overvoltage (VFTO) discretion, different spectral components of transient voltage waveform are achieved. The mathematical model of the transient electric field is deduced considering dielectric polarization loss and displacement current. FEM is adopted to calculate the transient electric field of gas insulated switchgear disk insulator under the...
The converter transformer bushing is one of the key devices in high voltage direct current (HVDC) system, which has a complex insulation system. To comprehensively evaluate the insulation properties of ±600 kV dry DC bushing, a finite element model is built and the electric field distributions under complex voltage are calculated. Results show that: the electric field concentrates more in the epoxy...
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.