Title :
A Hybrid Winding Model of Disc-Type Power Transformers for Frequency Response Analysis
Author :
Shintemirov, A. ; Tang, W.H. ; Wu, Q.H.
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Liverpool, Liverpool
fDate :
4/1/2009 12:00:00 AM
Abstract :
The paper presents a hybrid model of disc-type power transformer winding for frequency response analysis (FRA) based on traveling wave and multiconductor transmission line (MTL) theories. Each disc of a winding is described by traveling wave equations, which are connected to each other in a form of MTL matrix model. This significantly reduces the order of the model with respect to previously established MTL models of transformer winding. The model is applied to frequency response simulation of two single-phase transformers. The simulations are compared with the experimental data and calculated results using lumped parameter and MTL models reported in other publications. It is shown that the model can be used for FRA result interpretation in an extended range of frequencies up to several mega Hertz and resonance analysis under very fast transient overvoltages (VFTOs).
Keywords :
frequency response; multiconductor transmission lines; power transformers; transformer windings; transmission line matrix methods; MTL matrix model; disc-type power transformers; frequency response analysis; hybrid winding model; lumped parameter models; multiconductor transmission line; resonance analysis; single-phase transformers; traveling wave equations; very fast transient overvoltages; Frequency response; Multiconductor transmission lines; Partial differential equations; Phase transformers; Power system transients; Power transformers; Resonance; Transmission line matrix methods; US Department of Transportation; Windings; Frequency response analysis; multiconductor transmission lines; transfer functions; transformer windings;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2008.2007028
