When a fault occurs in a system, the main problem to be addressed is to raise an alarm, ideally diagnose what fault has occurred, and then decide how to deal with it. The problem of detecting a fault, finding the source/location and then taking appropriate action is the basis of fault tolerant control. In this chapter, an introduction to fault tolerant control (FTC) and fault detection and isol...

Aiming at the difficulty of fault location multi-source transmission lines, this paper proposes a method for multi-terminal lines based on branch judgment matrix. The traveling wave signal is decomposed by Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN), and IMFs sensitive components that can characterize characteristics target signals are selected constructing corr...

This paper investigates a new approach based on Artificial Neural Networks (ANNs) for real-time fault classification in power transmission lines which can be used in digital power system protection. The technique uses sampled current and voltage data of each phase at one terminal as inputs to the corresponding ANN. The ANN outputs indicate the type of the fault within a time less than 5 ms. The...

This paper presents a location algorithm for series arc fault in low-voltage indoor power line an AC 230 V 50 Hz home network. At both ends of the line, currents and voltages are recorded each generation at different distances. Previously map trace is created by using stored signature coefficients obtained from Kirchhoff equations which allow virtual decoupling line’s mutual capacitance. Then, ...

still leaves identifying which LBs are to be reconngured. For fault tolerance , this entails fault detection/location. For yield enhancement, a method for identifying faulty LBs that is transparent to the user is required.

An accurate fault detection, classification and direction estimation of double end fed transmission lines based on application of artificial neural networks is presented in this paper. The proposed method uses the phase voltage and current available at only the local end of line. This method is adaptive to the variation of fault inception angle, fault location and high fault resistance. The alg...

Protection of Extra High Voltage (EHV) multi-terminal circuits in power systems is complicated due to non-availability of measurements at the tap points. Locating a fault in such circuits is an important task for post-fault repairs or identification of weak spots in the system. This paper presents a new fault location scheme for an EHV multiterminal circuit. The proposed method utilizes synchro...

In the paper, two fault location algorithms are presented for transmission lines which use the line parameters to estimate the distance to the fault. The first algorithm uses only the measurements from one end of the line and the positive and zero sequence parameters of the line, while the second one uses the measurements from both ends of the line and only the positive sequence parameters of t...

Fault location and distance protection are essential smart grid technologies ensuring reliability of the power system. This paper describes an accurate algorithm for locating faults on double-circuit transmission lines. The proposed approach is capable of identifying the faulted circuit of a parallel transmission line by checking the estimated fault location and fault resistance. Voltage and cu...

Partial discharge is the commencement of failure of insulation of electrical devices used at high voltage. If such discharge is not detected then fault may increase at the working duration. Basically partial discharge is the cause of failure of insulation in electrical equipment. The insulation of electrical equipment deteriorates due to thermal, mechanical, electrical and environmental stresse...