Interference Detection and Assessment:
Identify interference sources (e.g., rail transit, high-voltage lines, nearby CP systems)
Measure dynamic stray currents (magnitude, direction) and abnormal potential fluctuations on pipelines/facilities
Evaluate interference severity and corrosion risk
Mitigation Design and Implementation:
Current Drainage Protection: Install DC drainers (polarized and adjustable) or grounding drainage devices to safely return stray currents to their source or to the ground
Potential Adjustment: Adjust CP system parameters (e.g., rectifier setpoints) in affected areas to compensate for interference
Shielding/Isolation: Use insulation devices, shield coatings, or cabling to block or reduce stray current paths
Grounding Optimization: Improve grounding systems of affected facilities or interference sources
Effect Verification and Monitoring:
Re-measure potentials and currents after mitigation to confirm effective suppression of interference
Verify that protection potentials meet standards and establish long-term monitoring points
