This paper presents an artificial neural network based protection scheme for detection and classification of one conductor open faults in parallel transmission line. A 220 kV double circuit transmission line of 100 km length has been simulated using MATLAB® software and its associated Simulink® and Simpowersystem® toolboxes. The fundamental components of current signals measured at relay locati...

Wind turbines are subject to variable aerodynamic loads and extreme environmental conditions. Wind turbine components fail frequently, resulting in high maintenance costs. For this reason, gearbox condition monitoring becomes important since gearboxes are among the wind turbine components with the most frequent failure observations. The major challenge here is the detection of faults under the ...

For long distance and high power transmission, high-voltage direct current (HVDC) transmission is a preferred solution due to its technical and economic advantages. A multi-terminal HVDC (MTDC) transmission system either based on voltage source converters (VSC) or line-commutated converters (LCC) has also been introduced recently. With the development of fast and high breaking capability HVDC c...

This paper presents a novel method for locating faults using setting point voltage and current data. The line model used is based on the frequency dependent parameter model and it is distributed in to two parts: Distributed Parameter model and Compensation matrix. Finite Impulse Response filters are used to fit the Compensation matrix. So by using local Sampling data, voltage and current at the...

The faults of some components in the TD-SCDMA network can cause failures of equipments and links. The failures will cause many derivative alarms in equipments. In order to find out the faults immediately and accurately, researches on the methods and mechanisms of the alarms’ correlation have been done. In order to reduce the number of alarms and enhance the contents of them, this paper presents...

To solve the problem of location fault point single-pole-to-ground faults in transmission lines MMC-HVDC systems, this paper designs a system based on support vector machine (SVM). The waveform traveling wave after occurs is collected as feature, and regression mechanism SVM utilized to achieve location. Because it very difficult locate high-resistance ground faults, first analyzes characterist...

In this paper the problems of protecting a cross-bonded cable system using distance protection are analysed. The combination of the desire to expand the high voltage transmission grid and the public's opinion towards new installations of overhead lines (OHL), more and more transmission cable systems are being laid around the world. Differential protection is often used for the main protection o...

This study presents an earth fault distance determination algorithm for distribution networks using active travelling waves. Three triacs are used in parallel with a three-phase breaker poles to overcome the mechanical inequality of poles’ reclosing times, so that three phases simultaneously reclosed. As proposed location technique is type controllable instant, arrival time reflected surge from...