Research on Inrush Current Mechanisms of Single Phase Transformers

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Volt-second Balance Method for Mitigation of Inrush Current in Single Phase Transformers

During the transient period at the start of transformer energization, it experiences a flux linkage that is up to twice its nominal steady state value and saturates the core. This causes a large inrush current to flow which affects the power system stability and power quality especially when the source is weak. Sequential phase energization technique and addition of neutral resistor are the maj...

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This paper presents a new method for evaluation and simulation of inrush current in various transformers using operational matrices and Hartley transform. Unlike most of the previous works, time and frequency domain calculations are conducted simultaneously. Mathematical equations are first represented to compute the inrush current based on reiteration and then Hartley transform is used to stud...

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Random energisation of power transformers often causes significant inrush currents and steep switching voltage wave fronts that are responsible for several adverse effects like huge current forces in the transformer windings, dielectric stress of the transformer winding insulation and temporary overvoltages. Controlled switching taking into account the residual flux is able to eliminate these i...

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A Method for Calculation of the Inrush Current in Single Phase Transformer including the Residual Flux

A field-circuit method for simulation of transients in a single-phase, two-winding transformer has been given. The magnetic field excited by the winding currents has been analyzed, and integral parameters have been determined. Including the equivalent circuit parameters and the magnetic residual flux in the silicon steel core, the developed method has been implemented for the transitional state...

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Modeling of Magnetizing Inrush and Internal Faults for Three-phase Transformers

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ژورنال

عنوان ژورنال: Journal of Physics: Conference Series

سال: 2018

ISSN: 1742-6588,1742-6596

DOI: 10.1088/1742-6596/1026/1/012030