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Pat. 10826381 United States, Int. Cl.22 H02M 1/32, H02J 9/06, H02M 5/458, H02M 7/48, H02M 1/12, H03H 7/01. Method and control system for zero-sequence current compensation for ground current reduction : Appl. N 15/955154 : Filed 17.04.2018 : Pub. 03.11.2020 : / Lorenzo Giuntini, Andrea Mannuccini ; Assignee Abb Schweiz Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10826381/en?oq=US10826381.html (дата обращения: ДД.ММ.ГГГГ).