System for electric energy transfer between the three-phase medium voltage distribution network and the three-phase dedicated alternating current network

摘要

The object of the invention is the electricity transmission system between the three-phase medium voltage grid and the three-phase AC grid. The system consists of a three-phase autotransformer (AT) with triangular windings, tightening the common primary and secondary sides (ZA1, ZB1, ZC1),are connected respectively to the three-phase mains voltage distribution network (SN) clamps and to the top tethers of the original anti-interference filters (FA, FB, FC) sides,and the secondary autotransformer side clamps (ZA2, ZB2, ZC2) are connected to the lower side clamps of the original anti-interference filters (FA, FB, FC),and the upper and lower end clamps of the secondary anti-interference filters (FA, FB, FC) are connected respectively to the upper end-point clamps (CA1, CB1, CC1) and lower end-point clamps (CAn, CBn, (CCn) an isolated three-phase multi-stage cascade voltage converter (IWKP) on the side of the three-phase medium voltage distribution network (SN).