[1] DC transmission Scientific Research Group of Power Generation Teaching and Research Center of Zhejiang University, “DC transmission,” Beijing, Publishing house of electric power industry, 1982, pp. 6-8.
[2] W. J. Zhao, “HVDC Transmission Engineering Technology,” Beijing: China Electric Power Publishing House, 2007, pp.1-3.
[3] Nanjing Nari-relays Electric Co., Ltd., “Design Specification for Earthing Electrode Line Monitoring,” 2009.
[4] “Maintenance Manuals of Electrode Line Monitoring,”Siemens, 2007.
[5] Y. S. Gong, Z. Z. Li and C. Y. Li, “Evapotranspiration Assessed According to Soil Water Content Measured by the Time Domain Reflectometer,” Journal of applied meteorological science,Vol. 9,No. 1,1998, pp.72-78.
[6] Q. Meng, “Research Development and Its Application in the Irrigation of the Time Domain Reflectometer,” Water Saving Irrigation, 1999, pp.1-3.
[7] S. D. Logsdon, “Effect of Cable Length on Time Domain Reflectometry Calibration for High Surface Area Soils,” Soil Science Society America, Vol. 64, No. 1, 2000, pp. 54-61. doi:10.2136/sssaj2000.64154x
[8] W. F. Kane, “Monitoring Slope Movement with Time Domain Reflectometry,” Applications for Engineers and Geologists, 2000, pp.1-8.
[9] J. Ammon, G. Plewka and G. Schaller, “Method and Device for the Electrical Monitoring of An Electrode Lead of A Bipolar HVDC Transmission System,” US Pat ent No.6518769 B1, 2003.
[10] G. Asplund, “Electrode Line Protection,” US Patent No. 5117323, 1992.