5Dawalibi F, Mukhedkar V. Resistance measurement of large grounding systems[J]. 1EEE Transactions on Power Apparatus and Systems, 1979, 98(6): 2348-2354.
6Zeng Rong, He Jinliang, Guan Zhicheng. Novel measurement system for grounding impedance of substations[J]. IEEE Transactions on Power Delivery, 2006, 21(2): 719-725.
7Lagace P J, Houle J L, Greiss H, et al. Computer aided evaluation of pipeline current near toroidal HVDC ground electrodes[J]. IEEE Transactions on Power Delivery, 1989, 4(1): 216-222.
8Habjanic A, Trlep M. The analysis of the additional substance influence on the grounding grid parameters by FEM[C]//IEEE/ACES International Conference. Honolulu, Hawaii, 2005: 545-548.
9Meliopoulos A P S, Xia Feng, Joy E B, et al. An advanced computer model for grounding system analysis[J]. IEEE Transactions on Power Delivery, 1993, 8(1): 13-23.
10Villas J E, Portela C M. Calculation of electric field and potential distributions into soil and air media for a ground electrode of an HVDC system[J]. IEEE Transactions on Power Delivery, 2003, 18(3): 867-873.
