Soil resistivity modeling for temperature rise calculating of HVDC deep-well earth electrode

•The soil resistivity model obtained by the conventional soil resistivity measurement method cannot reflect the actual temperature rise of deep-well earth electrodes.•For HVDC deep-well earth electrodes, the soil resistivity near the electrodes has a large effect on its temperature rise.•The local soil resistivity model is established to calculate the temperature rise of the earth electrode through the apparent resistivity logging data.•Simulation and experiments show that the soil resistivity model proposed in this paper can achieve higher accuracy.