Analysis of a Pole-To-Pole Short-Circuit On Bipolar Hvdc Converters

A pole-to-pole short-circuit of a HVdc converter with two bridges in cascade is analyzed. The effect of a common source reactance and blocking of valves are also considered. The computed current waveforms indicate approximately the same levels of peak current as obtlined previously for short-circuits of a single bridge. The interaction of the commutating reactances is found to be marginally significant.