Buried pipeline overvoltage protection method based on power transmission line layout optimization

The invention provides a buried pipeline overvoltage protection method based on power transmission line layout optimization, and belongs to the technical field of power transmission line design. Comprising the following steps: establishing an electromagnetic simulation model of a transmission line and buried pipeline shared channel; obtaining the safety limit value of the induced voltage of the buried pipeline coating during the single-phase earth fault period of the power transmission line in the electromagnetic simulation model; determining a parameter value range of the target power transmission line; determining a preliminary layout scheme of the target power transmission line; determining the tower grounding grid topology with the minimum induced voltage of the buried pipeline coating as a tower grounding grid topology structure adopted by the target power transmission line; selecting an overhead ground wire arrangement mode which does not exceed a buried pipeline coating induced voltage safety limit val