7JIANG J A, YANG Jun-zhe, LIN Ying-hong, et al. An adaptive PMU based fault detection/location technique for transmission lines[J].IEEE PWRD, 2000, 15 (2): 488- 491.
8Chen Yunping, Zhang Chenxue, Hu Zhijian. The principles and realization of zero-sequence parameter measurement of transmission line with mutual inductance based on GPS technology [ C] . International Power Engineering Conference, Singapore, 1997.