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Pat. 10637371 United States, Int. Cl.22 H02M 7/757, H02M 7/483. Interface arrangement between an alternating current power system and a direct current power system with control of converter valve for fault protection : Appl. N 15/532386 : Filed 22.12.2014 : Pub. 28.04.2020 : / Sasitharan Subramanian ; Assignee Abb Technology Ag, Abb Power Grids Switzerland Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10637371/en?oq=US10637371.html (дата обращения: ДД.ММ.ГГГГ).