STABILIZING WINDING FOR MVB IN TN AND TT GRIDS

摘要

The present invention relates to a power supply system with voltage stabilisation comprising, for each phase an autotransformer (TA, TB, TC) with a parallel winding (4, 5, 6) and a series winding (7, 8, 9), the autotransformer (TA, TB, TC) further comprising a tertiary winding (22, 23, 24) galvanically separated from the parallel (4, 5, 6) and series (7, 8, 9) winding of the autotransformer; a magnetic controllable inductor (MCI<SUB>A</SUB>, MCI<SUB>B</SUB>, MCI<SUB>C</SUB>) where the parallel winding (4, 5, 6) of the autotransformer (T<SUB>A</SUB>, T<SUB>B</SUB>, T<SUB>C</SUB>) is series connected to a first winding (13, 14, 15) of the magnetic controllable inductor MCI<SUB>A</SUB>, MCI<SUB>B</SUB>, MCI<SUB>C </SUB>between the input voltage (Ua, Ub, Uc) and the neutral point, and the tertiary winding (22, 23, 24) of the autotransformer (T<SUB>A</SUB>, T<SUB>B</SUB>, T<SUB>C</SUB>) is connected to a second winding (16, 17, 18) of the magnetic controllable inductor (MCI<SUB>A</SUB>, MCI<SUB>B</SUB>, MCI<SUB>C</SUB>) through their respective first terminals forming pairs of windings, where these pairs of windings are mutually connected.