Abstract
The first work on the investigation of transient processes in high-voltage electrical networks was begun in the U.S.S.R. and abroad for the purpose of predicting the possibility of the rise of over-voltage. The investigation of transient processes in the presence of earthing in systems with an ungrounded neutral and arc-extinguishing apparatus was undertaken for this purpose. Over-voltages caused by lightning and switching were investigated. The dynamic over-voltages in the presence of two-phase short-circuits and the recovery voltage when disconnecting short circuits were calculated. The use of phase breaking in power systems necessitated the working out of methods of calculating recovery voltages in the presence of different types of asymmetrical short-circuits taking single-phase automatic reclosure into account. The planning and construction of series compensated transmission lines in their turn necessitated the working out of engineering methods of calculation of transient processes in three-phase circuits with series capacitive compensation.
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