Abstract A gas relay is an important non-electric protection device for transformers. Under the action of vibration caused by sudden short circuit impact, misoperation leads to transformer tripping accidents frequently. In order explore relationship between intensity and anti-vibration performance during a circuit, capacity test were carried out. The analysis data shows that process will cause ...

The discrimination of inrush currents and internal fault in transformers is an important feature a transformer protection scheme. harmonic current restrained used conventional differential relay transformers. A literature survey shows that the between still area open to research. In this paper, classification magnetic performed by using extended Kalman filter (EKF) algorithm. When energized und...

In this paper, we propose a combined use of transformed images and vision transformer (ViT) models with secret key. We show for the first time that trained plain can be directly to encrypted on basis ViT architecture, performance is same as when using test addition, proposed scheme does not require any specially prepared data training or network modification, so it also allows us easily update ...

In recent years several catastrophic power systems blackouts have occurred worldwide. Various reasons have been declared for these failures. Economical limitations due to power system restructuring restrictions, inadvertent operation of protective relays and inefficient design of conventional load shedding schemes are of the most important reasons causing these blackouts. In fact, due to both e...

Watermarking is one of the best solutions for copyright protection and authentication of multimedia contents. In this paper a hybrid scheme is proposed using wavelet and shearlet transforms with singular value decomposition. For better security, Arnold map is used for encryption. Examining the results and comparing with other methods show that this hybrid proposed scheme with simultaneous utili...

Abstract: This paper proposes a novel protection method for single line-to-ground (SLG) faults in ungrounded low-inertia microgrids. The proposed method includes microgrid interface protection and unit protection. The microgrid interface protection is based on the difference between the zero-sequence voltage angle and the zero-sequence current angle at the microgrid interconnection transformer ...

259 Lines are protected by overcurrent-, distance-, or pilot-relaying equipment, depending on the requirements. Overcurrent relaying is the simplest and cheapest, the most difficult to apply, and the quickest to need readjustment or even replacement as a system changes. It is generally used for phaseand ground-fault protection on station-service and distribution circuits in electric utility and...

This article provides a description of protection based on the transformer model. The described by authors does not require calculations and depend operating mode power system. sensitivity ensures detection internal coil short circuits in case transformer. compares proposed algorithm with an improved version differential protection, which is capable fixing most