Assessment and mitigation of DC bias risk in power grids at provincial boundaries. - Xu, Bichuan; Guo, Lei; Pan, Zhuohong; Liu, Yuting; Tong, Tao; Li, Tangbing; Ding, Liang; Wan, Hua; Zhang, Jing (Journal of Computational Methods in Sciences & Engineering (Sage Publications Inc.), 2022)