The Research on New Type of Earth Resistivity Exploring Method for HVDC Deep-well Earth Electrode

The new method and inversion was proposed which include Induced Polarization (IP) and Controlled Source Audio Magnetotelluric (CSAMT) methods to explore the resistivity distribution of the HVDC Deep-well electrode. Through an engineering example, the results show that it can covering the ground depth of 0-10Km. And compared with commercial software CDGES and winIPI2, the root mean square (RMS) error is very small. It is proved that the differential evolution inversion (DE) mentioned in this paper has high inversion accuracy.