Zhao, Xiaojun; Zhang, Chunjiang; Guo, Xiaoqiang; Chai, Xiuhui; Jia, Dongqiang; Shi, Changli; Wei, Tongzhen: 'Novel power flow analysis method based on impedance matching for UPQC with grid voltage fluctuations and unbalanced loads', IET Power Electronics, 2020, 13, (19), p. 4417-4427, DOI: 10.1049/iet-pel.2019.1447
IET Digital Library, https://digital-library.theiet.org/;jsessionid=22aaeuuh96vtp.x-iet-live-01content/journals/10.1049/iet-pel.2019.1447