Classification of Thyristor Commutation Methods

A classification of thyristor commutation methods is presented. The classification is based on whether the commutation pulse is a voltage pulse or current pulse, whether it is connected in parallel or in series with the thyristor to be commutated, whether the pulse is applied with the help of a main or an auxiliary thyristor, and whether the commutation circuit is charged from the main source or from an auxiliary source. Inverters are further classified according to the location of the commutation pulses.