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.
Space charge accumulation is a key factor concerning the safe operation of HVDC cables. In order to investigate space charge behavior of HVDC cross-linked polyethylene (XLPE) cables, degassed specimens as well as fresh specimens obtained from HVDC XLPE cables before and after type tests were tested by PEA measuring system. The measurement was performed under DC electric fields of 10kV/mm, 20kV/mm,...
The dielectric properties of nanocomposite can be affected by the concentration, surface modification and grain size of the nano-filler. This paper presents the pulsed electro-acoustic (PEA) measurement results of space charge distribution in pure low-density polyethylene (LDPE) and LDPE/MgO nanocomposite with different nano-filler size. The results show that a large amount of heterocharge accumulates...
In this paper, an simply ion charge transport model is proposed, compared with bipolar charge transport model. It consists of ion generation by field assisted dissociation of impurities, transport, trapping and recombination in polymer. To simplify the model, it is assumed that only one type of impurity existing in polymer. Space charge behavior is simulated with the modified model. Compared with...
Electrical characteristics of cross-linked polyethylene (XLPE) often vary depending on temperature. The accumulation of space charge in the insulation of extruded HVDC cables is frequently discussed and considered in development of insulation systems designed for HVDC application. Thus it is important to study and attempt to understand the space charge behavior in XLPE under various temperatures....
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.