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Pat. 11005358 United States, Int. Cl.22 H02M 1/32, H02J 1/10, H02M 3/155, H02M 7/537, H02S 40/32, H02S 40/34, H02S 40/36, H02S 50/00, H02M 1/00. Flexible direct current system of photovoltaic plant having active control-based protection system : Appl. N 17/136972 : Filed 29.12.2020 : Pub. 11.05.2021 : / Ke Jia, Tianshu Bi, Rui Zhu ; Assignee North China Electric Power University ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11005358/en?oq=US11005358.html (дата обращения: ДД.ММ.ГГГГ).