Influence of Impulse Current Waveform on Current Distribution of Parallel-connected Multi-column Arresters

Abstract

In order to improve the energy absorption ability of the surge arrester, the high-voltage DC transmission system which has long duration and high energy overvoltage usually adopts paral-lel-connected multi-column arresters. The uniformity of the current distribution between columns determines the total energy absorption capacity of the arrester. In this paper, the effect of impulse current waveform on the non-uniformity of current distribution between four-column parallel valves is studied by testing the arrester of two manufacturers, and the results show that the waveform of the impulse current has a certain effect on the current non-uniformity, but the effect will not exceed the standard value.