Title :
Wave Process in Scale-Down Model of UHVDC Converter Transformer Under the Lightning Impulse Voltage
Author :
Zi-Heng Pu ; Jiang-Jun Ruan ; Ya-Dong Zhang ; Zhi-Ye Du ; Qi-Jia Xie
Author_Institution :
Coll. of Electr. Eng. & New Energy, China Three Gorges Univ., Yichang, China
Abstract :
An experimental scale-down model of ultra high voltage direct current converter transformer is designed and manufactured to study the wave process in the winding under impulse voltage. Nine outgoing lines are configured on different winding coils of the scale-down model. The voltage waveforms of different outgoing lines are obtained by the lightning impulse voltage. The simulation model of scale-down transformer is established to calculate the distributed parameter matrices through the finite-element method. The equivalent circuit of the transformer winding is proposed to calculate the voltage waveforms and the potential gradient distribution. The comparative analysis of test and simulation results shows that the oscillating voltage occurs in the winding, and the simulation results can reflect the wave process characteristics.
Keywords :
DC transformers; equivalent circuits; finite element analysis; transformer windings; UHVDC converter transformer; distributed parameter matrices; equivalent circuit; finite-element method; lightning impulse voltage; outgoing lines; potential gradient distribution; scale-down model; scale-down transformer; transformer winding; ultra high voltage direct current converter transformer; voltage waveforms; wave process characteristics; winding coils; Integrated circuit modeling; Lightning; Power transformer insulation; Resistance; Simulation; Voltage measurement; Windings; Converter transformer; converter transformer; equivalent circuit; lightning impulse voltage; scale-down model; wave process;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2438155
