Faults and damage in oil-filled power transformers has a devastating effect on the overall reliability of electrical power systems. Several factors, especially electrical and thermal stresses age the transformer and subject them to incipient faults. These faults, if left undetected will cause deterioration and eventually lead to failure of the transformer [1]. The presence of faults such as arc...

Power transformers prove to be a vital element or tool in electrical power supply and transmission system. They are capital intensive units and need to be monitored for faults. Faults in transformers leading to their failure are repugnant. Thus, there is a need to detect such faults at an initial level. This paper aims to detect, diagnose the nature and cause of mechanical faults, their identit...

Programmers use databases when they want a high level of reliability. Specifically, they want the sophisticated ACID (atomicity, consistency, isolation, and durability) protection modern databases provide. However, the ACID properties are far from trivial to provide, particularly when high performance must be achieved. This leads to complex and error-prone code—even at a low defect rate of one ...

THIS ARTICLE EXPLORES A NONTRADITIONAL approach to asset management in which operational and nonoperational data captured during power system events like faults and other disturbances are utilized for condition-based assessment of power system assets such as transmission lines, circuit breakers, and transformers. As an example, during faults on transmission lines, determining the location of th...

This paper proposes a single-ended fault detection scheme for long transmission lines using support vector machine (SVM) multi-terminal direct current systems based on modular multilevel converter (MMC-MTDC). The overcomes existing difficulties in the protection of resulting from high grounding resistance and attenuation, also avoids sophisticated process threshold value selection. high-frequen...

In this paper, a new algorithm based on processing differential current harmonics is proposed for digital differential protection of power transformers. This algorithm has been developed by considering different behaviors of second harmonic components of the differential currents under fault and inrush current conditions. In the new method, a criterion function is defined in terms of the time v...

Accurate and robust fault location algorithm for parallel lines compensated with one three-phase bank of series capacitors in each the line is presented. The algorithm is categorized as one-end fundamental frequency based technique which offsets the series compensation effect and the reactance effect resulting from the remote end infeed under resistive faults as well as takes the countermeasure...

s This paper presents a framework for transients classification using wavelet transform and two specific artificial neural networks, propabilistic neural networks (PNN) and resource allocating neural networks (RAN). One significant feature of wavelet for transients characterization is its timescale two dimensional but compact representation. One distinguishing feature of PNN and RAN is the abil...

In this paper, we suggest that the dynamic power dissipation of a circuit can be used to detect faults in it. The change in dissipation caused by a fault can be maximized by applying speciic test vectors. For example circuits, we show that the power dissipation can be used to detect faults which do not aaect static power dissipation. We also discuss how faults may be detected with a frequency d...