Modification of Mathematical Model for Electromagnetic Calculation of Cable with Single-Ended Grounded System

In this paper, the corrected mathematical model for electromagnetic calculation of cable grounding system with single-ended grounding is investigated in order to solve the errors caused by the existence of complex ground network and unknown conductors and other factors on the calculation results in practical applications. Combined with the actual measurement data, the superposition theorem and chi-square theorem are used for mathematical modeling and correction. The corrected model can output the expected results when the input excitation changes. The corrected model in this study can more accurately invert the electromagnetic induction results of the cable grounding system, and provide theoretical support for the calculation of actual induced electric parameters in cable engineering.