Study of surge arrester model under influence of various current pulses

Effect of piecewise linear current waveforms on surge arrester residual voltage

“…Compare these results with the values of the residual voltage obtained earlier in paper [4] when used current pulses, approximated by smooth (continuously differentiable) functions.…”

“…As well as in their previous publications [1,4], authors continue work on surge arrester modeling by means of the evaluation version of Micro-Cap 11 circuit simulator developed by Spectrum Software Company (United States of America) [14]. The main research circuit is shown in Fig.…”

“…The procedure of calculation of these parameters is described in [15]. In papers [1,4] two equivalent ways of metal-oxide surge arrester modeling in the demonstration version of MicroCap 11 are presented: 1) with a use of voltage-controlled current sources (NTIofV);…”

“…This way use only voltagecontrolled current sources (NTIofV). In this work as well as in paper [4] the same model of surge arrester with the rated voltage 108 kV is used. According to [4], inductive parameters of this model are following:…”

“…Also the value of the residual voltage at a steep front current pulse with wave shape 1/2 μs and the same ratio are taken place. A rather complex expression was used in [4] to approximate the pulse with the wave shape 45/90 μs. With the help of piecewise linear approximation, it is possible, bypassing complex calculations, to describe pulses of almost any shape, including switching current pulses, steep front current pulses and chopped voltage pulses.…”