6International Electrotechnicgy, Commission. IEEE std80-2000, IEEE guide for safety in AC substation grounding[S]. International Electrotechnical Commission, 2000.
7He Jinliang, Gao Yanqing, Zeng Rong, et al. Optimal design of grounding system considering the influence of seasonal frozen soil layer[J]. IEEE Trans. on Power Delivery, 2005, 20(1): 107-115.
8He Jinliang, Zeng Rong, Gao Yanqing, et al. Seasonal influences on safety of substation grounding system[J]. IEEE Trans. on Power Delivery, 2003, 18(3): 788-795.
9Zou J, Zeng R, He J L, et al. Numerical Green's function of a point current source in horizontal multi-layer soils by utilizing the vector matrix pencil technique[J]. IEEETrans. on Magnetics, 2004, 40(2): 730-733.