Application of equivalent instantaneous inductance algorithm to the Y-Δ three-phase transformer

Magnetic circuit decomposition model and novel inner‐turn fault protection scheme for shunt reactor with auxiliary windings

“…When an inner-turn fault occurs in the power winding, the analysis of SRAW is analogous to the general inner-turn fault equivalent method of double-winding transformer [18,19]. Specifically, if an inner-turn fault occurs in fault location f 2 shown in Figure 1, an additional winding is connected in parallel with the magnetizing branch L m1 of the faulty phase, resulting the faulty phase and the non-faulty phases [20,21].…”

Multiscale multivariate fuzzy entropy‐based technique to distinguish transformer magnetising from fault currents

“…At present, two major types of discrimination algorithm are available. The first type is the discrimination scheme based on theoretical analysis, such as flux characteristic method [6, 7], equivalent instantaneous inductance [8, 9] and differential power method [10], which selects the generation mechanism of magnetising inrush current as the starting point. These methods improve the magnetising inrush current discrimination of differential protection.…”