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.
Transform is a vital equipment in power system that need protection system in order to provide fast and correct response when disturbance occur in system. So, this paper proposed internal and external fault classification in Transformer using algorithm based on discrete wavelet transform (DWT). Low frequency component from DWT has been used to create condition for algorithm. The proposed algorithm...
The modern power electric network is subject to insure more and more complicated functions; the main functions are transfer of energy and information. The faults in wiring cables constitute one of worst problems of power electric network. In practice, the combination of Time Domain Reflectometry (TDR) and wavelet transform is generally used to detect and localize the faults in electric network. Classically,...
In the presented work, an efficient model for classification of fault of a transmission line is proposed. The scheme proposed is the combination of Empirical Mode Decomposition and Probabilistic Neural Network for the classification of ten types of shunt fault. Post fault current signals are used for feature extraction for further study. Empirical Mode Decomposition (EMD) method is used to disintegrate...
Classification of transmission line faults with waveform characterization are presented in this paper. The characteristic signatures of current and voltage waveforms were extracted, and used to classify the cause of faults focusing on lightning strike, tree encroachment and animal contact. Field data of 75 fault events, recorded by digital fault recorders, were investigated to create and test the...
This paper presents a wavelet based protection scheme for a multi terminal transmission system in presence of SVC. Increase in the power transfer capability and the efficient utilization of available transmission lines, improving power system stability and controllability have made strides and created Flexible AC Transmission (FACTS). These FACTS devices have adverse effects on distance protection...
To solve the difficulty that existing analysis methods cannot get complete analytic solution of fault-induced travelling-wave on transmission line, an analysis method is presented in this paper, which decomposes fault-induced travelling-waves into non-stationary component and stationary component and then get the approximate analytic solution of stationary component. Non-stationary component reflects...
When a short-circuit fault with transition resistance occurs on a transmission line, it is difficult to derive the distribution coefficients if both ends of the transmission line are not synchronous. So, for the distance protection and fault location device, it is difficult to give an accurate analytical expression for the impedance measurement. For this problem, this paper aiming at the one-phase...
When a short-circuit fault with transition resistance occurs on a transmission line, it is difficult to derive the distribution coefficients if both ends of the transmission line are not synchronous. So, for the distance protection and fault location device, it is difficult to give an accurate analytical expression for the impedance measurement. For this problem, this paper aiming at the two-phase...
This paper investigates application of dynamic phasors for accelerated study of electric power system dynamics. Four different modelling techniques are applied to simulate the example system that includes synchronous generator, transmission line and load, under both normal and faulty operation. Effectiveness of dynamic phasor concept for electric power systems modelling is shown, and the ways to achieve...
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.