An Investigation of Induced Voltages to an Underground Gas Pipeline from an Overhead Transmission Line

摘要

This paper investigates induced voltage characteristics from an overhead transmission line by applying a method of modeling of induced voltages proposed by the authors. EMTP simulation results obtained by the modeling method agree with analytical results obtained from a well-known formula. The induced voltages are significantly dependent on the configuration of the overhead line. A horizontal line induces the largest voltage in a gas pipeline, and the voltage induced by a vertical twin-circuit line is about 20% smaller than that induced by a vertical single-circuit line. The method is applied to a real pipeline system and the simulation results show reasonable agreement with field test results.