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.
A new interphase distance relaying algorithm for series-compensated transmission lines is proposed in this paper. The fault impedance can be correctively calculated using the proposed algorithm without requirement of the parameters of series capacitor device. The series capacitor can be simplified as a linearized impedance during the fault period, but its parameters can be used as variables in fault...
A transient fault information based IED integrating protection fault location, fault record, measurement and control functions for transmission line is proposed in this paper. IED hardware scheme adopts multiple CPU distributed structure, and includes mainly the following modules: process level communication module, protection module, fault location and record module, measurement and control module,...
This paper reviews the characteristics of inrush current and analyses its causes. The development of digital substation and the concept of integrated protection are also outlined. The paper studies different models to simulate several kinds of inrush and internal short-circuit fault. Through these models, the new composite algorithm is analysed in order to verify the reliability and sensitivity of...
With the increasing development of wind power, the capacity of wind farms is larger and its impact on grid operation has become more prominent. The fault current that wind farms provide is much different from the traditional synchronous machines. Wind farms in China are mostly centrally connected to power system. The central integration enlarges the impacts on power system. The correct action of the...
Smoothing reactors, together with the DC filter banks installed at both ends of the HVDC transmission line constitute the `natural boundary', which leads to significant difference in attenuation characteristic of different frequency components of fault transient signals detected by protection. By means of Hilbert-Huang Transform, which is a kind of non-stationary transient signal processing method,...
The fast development in both microprocessor and transducer technologies has enabled fault detection techniques to be considered which were impractical in the past and encouraged interest in the utilization of fault generated transients for protection. This paper presents an integrated approach for high-speed protection of transmission lines. The technique uses a fault transient detector unit at the...
The paper presents extensive simulation studies with respect to a typical EHV transmission line systems, the proposed protection technique is able to give correct responses for various system and fault condition. Furthermore, the protection scheme offers not only fast protection for individual line section, but also integrated protection for all lines connected to the substation, therefore it could...
We postulated that atrial fibrillation (AF) induced electrical remodelling in electrically heterogeneous human atria facilitates chronic AF. A modern biophysically detailed mathematical model of human atrial action potential was modified to incorporate electrophysiological properties of different cell types present within the atria. The heterogeneous cell models were then further modified to incorporate...
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.