Effecting Factors of Mitigation of AC Interference

The effects of length, radius, position and laying method of mitigation wires on AC interference voltages were studied by software simulation. The results show that AC voltages along the pipeline decreased with the increase of length and the mitigation efficiency was independent of load current of power line. AC voltages decreased first and then increased with the increase of radius. AC voltages reached the minimum as the radius was 0.006 m. AC voltages reached the minimum as the mitigation wire located between pipeline and power line. Efficiency of parallel Zn was better than that of net grounding and deep well grounding.