... widely varying loads on it. These loads do not show the usual weekday early morning and evening residential peak loads, but rather have some erratic (by “clock” and “calendar” evaluations) highs and lows for induced AC voltages. It is important to note also that no significant changes in AC power load...

...Abstract When a paralleling power line or pipeline route has been committed to close to an existing utility, the induced AC (IAC) mitigation engineer may be severely limited in the techniques available to adequately ground the pipeline(s) where required. Such was the case on a recently completed...

... in other aspects of cathodic protection and pipeline integrity management. AC voltage induced AC soil resistivity high voltage transmission INTRODUCTION Soil resistivity is one of the primary factors contributing to corrosion of buried pipeline structures. As such it is also a primary factor...

... current circuit resistance global positioning system GPS coating defect cathodic protection CP induced AC data integrity %IR INTRODUCTION Pipeline operators require accurate data to evaluate the level of cathodic protection and information about possible defects along the pipeline...

...As a means of mitigating these safety and integrity risks associated with induced AC interference on pipelines, computational modeling and field monitoring is often used to assess the severity of the AC interference prior to designing a mitigation system. In building a computer model...

..., when pipelines are collocated along high voltage AC power transmission lines, the high dielectric effect of fusion bond coatings may have a detrimental effect resulting in induced AC voltage. These induced voltages may create safety hazards to operating personnel and the general public and are known...

... steel is approximately 1 cm². * These factors were not present in this pipeline. It is interesting to note that the most rapid corrosion did not occur at the points of the highest induced AC voltage on the pipeline. AC corrosion is not controlled directly as DC corrosion is. Rather, methods...

...grounding grid HVAC induced AC induced AC mitigation point ground transferred potential Computer modeling various mitigation schemes clearly showed that installation of a single zinc ribbon mitigation wire would have provided effective grounding of the pipeline in the very low electrical...

... line grounding system, measurements of grounding grid effectiveness, and induced AC testing. underground pipeline piping oxygen explosion induced AC grounding isolation lightning INTRODUCTION An industrial steel manufacturer operates industrial gas piping between three of its steel plants...

... mitigation measures which will maintain electrical isolation and cathodic protection of the pipeline and reduce the AC interference to acceptable levels. AC Interference induced AC stray current pipeline impedance cathodic protection electrical hazard mitigation AC resistance pipeline resistance...