Simulation Assessment for Electromagnetic Interference of 500 kV Submarine Cable to Adjacent Crude Oil Pipeline

A 500 kV submarine cable had a risk of electromagnetic interference to adjacent crude oil pipelines. The CDEGS software was used to simulate and evaluate the interference voltages and current densities of the crude oil pipelines during normal operation of the submarine cable and in single phase short to ground. The results show that when the submarine cable ran normally, the maximum interference voltage was 0.063 1 V and the maximum current density was 9.36 A/m² for the pipeline, which met the safety requirements of interference voltage less than 4 V (GB/T 50698-2011 standard) and current density less than 30 A/m² (BS EN 15280:2013 standard). When single phase of the submarine cable was short-circuited due to external factors, the maximum interference voltage of the pipeline was 66.35 V in short time, which was less than the coating breakdown voltage of 3 000 V (NACE SP0177-2007standard) and met the personal safety requirement of interference voltage less than 1 500 V during 0.2 s (DL/T5033:2013 standard). The simulation results show that the construction of the 500 kV submarine cable will not cause significant electromagnetic interference to the adjacent pipelines.