Title :
Modeling of Transformer Windings Under Very Fast Transient Overvoltages
Author :
Liang, Guishu ; Sun, Haifeng ; Zhang, Xile ; Cui, Xiang
Author_Institution :
Sch. of Electr. Eng., North China Electr. Power Univ., Baoding
Abstract :
To calculate the overvoltages in transformer windings under very fast transient overvoltages (VFTOs) generated by switching operations in gas-insulated substation (GIS), a single-input and multiple-output circuit model, which is based on a multiconductor transmission line (MTL) model, is presented in this paper. The procedure to determine the transfer function is deduced. Vector fitting and recursive convolution are used to calculate the time domain response. The resonant frequencies and the location of the resonance are determined by an analysis of the amplitude-frequency response characteristics. For validation, the calculated results are compared with the measurements on a transformer winding model, and the results are found to be satisfactory
Keywords :
gas insulated substations; overvoltage protection; power transformer protection; transformer windings; amplitude-frequency response characteristics; gas-insulated substation; multiconductor transmission line; time domain response; transformer windings; vector fitting; very fast transient overvoltages; Gas insulation; Geographic Information Systems; Multiconductor transmission lines; Power system transients; Substations; Surges; Switchgear; Switching circuits; Transfer functions; Windings; Resonance; transformer windings; vector fitting; very fast transient overvoltage (VFTO);
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
DOI :
10.1109/TEMC.2006.884537
