Current differential protection has been widely used as the primary protection of
transformers. However, inrush currents during transformer energization can cause …

Differential protection is one of the most widely used protections in power transformers. The
challenges associated with this protection are distinguishing the inrush current …

This paper describes a differential algorithm for the protection of a three-phase transformer
to differentiate transient phenomena, such as inrush currents and external faults from solid …

The algorithms of the present generation of practical differential relays are based on two
methods. The first method is based on the ratio of the harmonic content of the differential …

This paper proposes a new algorithm for power transformer differential protection based on
the instantaneous-current-value negative sequence current signals, which are reconstructed …

In general, a power transformer is equipped with differential protection relay with the second
harmonic restraint criterion to improve reliability. However, this criterion may fail in some …

For safe operation of power systems, it is essential that the transformer protection operate
reliably if a fault occurs. There are many challenges in developing a fast and accurate …

The current transformer (CT) saturation phenomenon has been one of the main problems for
the power transformer differential protection, leading to incorrect current measurements and …

This paper proposes the boundary discrete wavelet transform-based differential protection
for detecting internal faults during inrush conditions in order to enhance both the safety and …

Due to the different ratings of the current transformers (CT) located on different sides of
power transformer, only the CT of low ratings will saturate when the power transformer …