@article{{JPT}{}, author = {Xiaojuan, H., Jun, S., Rong, F., Wanqian, S.}, title = { Analysis on the Operating Characteristic of UHVDC New Hierarchical Connection Mode to AC System}, journal = {Journal of Power Technologies}, volume = {96}, number = {4}, year = {2016}, url = {https://papers.itc.pw.edu.pl/index.php/JPT/article/view/862} }