One-end fault location techniques for seriescompensated parallel lines are investigated. First, the basic fault location algorithm is presented briefly. Then, the new concept overcoming the drawbacks of the basic algorithm is delivered. The ATP-EMTP program for equivalencing of Series Capacitors (SCs) equipped with Metal Oxide Varistors (MOVs) is presented. Reliable fault data for evaluation of...

A novel diagnosis method has been developed based on transistor operating point analysis. The method is worked by the way of fault logic propagation trace based on voltage value and the way of operation time setting of each gate circuit. The former way is to detect penetration current net result from fault, replace the net with impedance net, calculate voltage value of each node of the impedanc...

Simulations run on sample circuits show that extremely high detection of bridging faults is possible using modifications of psuedo-exhaustive test sets. Real chips often contain bridging faults, and this research shows that stuck-at test sets are not sufficient for detecting such faults. The modified pseudo-exhaustive test sets are easy to generate and require little, or no, fault simulation. r...

High impedance faults (HIFs) detection in overhead distribution networks have been a major challenge for utility engineers long time. The current flowing to ground path is so low that conventional protection does not detect HIFs. problem becomes more critical when HIFs occur rural feeders with many single-wire earth return networks, since the neutral usually set above normal unbalance of circui...

The SVC (Static Var Compensator) based on voltage source converter (VSC) is used for voltage regulation in transmission and distribution system. The SVC can rapidly supply dynamic VARs required during system faults for voltage support. The apparent impedance is influenced by the reactive power injected or absorbed by the SVC, which will result in the under reaching or over reaching of distance ...

A novel fault phase selector for double-circuit transmission lines is presented. The fault type is determined with the superimposed components and steady state components of fault voltage. According to the determined fault type, auxiliary criteria based on the magnitude and phase difference of fault phase current is applied to judge whether inter-line fault happens or not. If inter-line fault h...

Electrical faults, which can occur at all voltage levels in an electricity supply system, are a health and safety risk. Multi-branch distribution networks represent significant ongoing challenge for fault detection, with the greatest being high impedance (HIF) detection. To date, research has focused on higher levels, monitoring sensors have traditionally only been installed limited locations w...

This paper presents an evaluation of the impacts simulation models for high impedance faults detection in microgrids with distributed generators interfaced by voltage source converters. Detailed are used to consider frequency switching power electronics and, consequently, associated harmonic distortions. Thus, systems a higher degradation current sine waveform, fault characteristics such as non...