Electromagnetic interference detection

The magnetic field generated by the traction current of the cable may interfere with nearby precision instruments such as medical equipment, computer equipment, televisions, etc. by the magnetic field, causing the image to blur and flash. Electromagnetic interference mainly comes from the longitudinal induced voltage of the electric magnetic field. This longitudinal induced voltage is proportional to the load current, mutual inductance impedance, imbalance rate, power cable shielding coefficient, the shielding coefficient of the disturbed line, and the background magnetic field shielding coefficient. The reduction of each item will reduce the longitudinal induced voltage of the magnetic field, wherein the load currentAnd the imbalance rate depends on the electricity consumption situation. It cannot be improved through the planning of common pipelines. The rest can be improved through strategies such as cable layout and enhanced shielding.