Xia, Chengjun; Li, Chengxiang; Lan, Haiwen; Du, Zhaobin; Chen, Yiping: 'Frequency regulation strategy based on variable-parameter frequency limit control during black start', IET Generation, Transmission & Distribution, 2018, 12, (17), p. 4002-4008, DOI: 10.1049/iet-gtd.2018.5416
IET Digital Library, https://digital-library.theiet.org/;jsessionid=6i0fd60hi6p0m.x-iet-live-01content/journals/10.1049/iet-gtd.2018.5416