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Pat. 10923906 United States, Int. Cl.22 H02H 7/125, H02H 7/26, H02J 3/36, H02M 7/06. Fault switch configuration and clearing method in flexible DC converter station : Appl. N 16/500189 : Filed 22.05.2018 : Pub. 16.02.2021 : / Yu Lu, Gang Li, Jie Tian, Nannan Wang, Haiying Li, Chongxue Jiang, Shunke Sui ; Assignee Nr Electric Co Ltd, Nr Engineering Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10923906/en?oq=US10923906.html (дата обращения: ДД.ММ.ГГГГ).