Transformer stabilizers of alternating voltage with regulation on the primary side

The article covers analysis of operation of AC voltage stabilizers which can switch transformer primary winding. Occurring problems and possible solutions are also considered.The authors give structural scheme of stabilizer power block and present analysis of transformer operation modes. The paper also describes construction schemes powerful AC voltage stabilizers with discrete regulation on the basis of booster transformers. Peculiarities of switching the transformer primary winding by using thyristor keys and electromagnetic relays are considered. The authors provide recommendations on the restriction of the magnetizing current of transformer core at primary winding switching. Oscillograms of currents and voltages at the stabilizer operation are given.The presented findings can be of interest for specialists in the field of power electronics and power supply of industrial enterprises.