distance relays are used to protect ehv and hv transmission lines. over the past decades many algorithms have emerged for digital distance relays. these are based on the calculation of the transmission line impedance from the relaying to fault points. in this paper a novel method for digital distance relaying is proposed. in the method the tracking procedure is implemented. the method uses the ...

This paper presents the impact study of GTO Controlled Series Capacitor (GCSC) parameters on measured impedance (Zseen) by MHO distance relays for single transmission line high voltage 220 kV in the presence of single phase to earth fault with fault resistance (RF). The study deals with a 220 kV single electrical transmission line of Eastern Algerian transmission networks at Group Sonelgaz (Alg...

A novel diagnosis technology based on transistor operating point analysis is presented. This technology is the way to detect penetration current net result from fault, replace the net with impedance net, calculate voltage value of each node of the impedance net by OHM’s low, and then sequentially trace the fault logic propagation. The impedance is determined by using transistor dimension and it...

High impedance fault HIF produced when an energized conductor falls and contact with an objects have high impedance like: tree limb, concrete walls, or falls down to the ground. The importance of these undetectable faults is represent a safety hazard, also a risk of arcing that causes ignition of fires. This type of fault is cannot be detected by overcurrent protections . The techniques of dete...

With the introduction of distributed generators (DG), the traditional distribution system characterized by radical network becomes a multi-source one. Therefore the accuracy of the equivalent model of distributed generators directly affects the precision of fault location. To solve this problem, this paper proposed a fault location method based on complex correlation Thevenin equivalent and str...

This paper presents a support vector machine (SVMs) approach for locating and diagnosing faults in electric power distribution feeders. The proposed approach is based on the measurements available at the substation and remote terminal units (RTUs). To illustrate the proposed methodology, a practical distribution feeder emanating from 132/11KV-grid substation in India with loads is considered. T...