Библиографическая ссылка на патент
Pat. 10116238 United States, Int. Cl.22 H02M 7/757, H02J 3/36, H02M 5/44. Power grid frequency flexible operation system and method using the same : Appl. N 14/794491 : Filed 08.07.2015 : Pub. 30.10.2018 : / Gilsoo Jang, Yunsung Cho, Jaewan Suh ; Assignee Korea University Research and Business Foundation ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10116238/en?oq=US10116238.html (дата обращения: ДД.ММ.ГГГГ).