... at discontinuities and reduces subsequently along the pipeline. RESISTIVE COUPLING ABSTRACT This paper discusses case studies of high voltage direct current (HVDC) & high voltage alternating current (HVAC) crossing Pipelines right of way (RoW) showcasing the effects of alternating current (AC) interference...

... companies. Data collected is remotely communicated to cloud servers where advanced computations are performed and the data is made available for remote viewing or system integration via an API. The information collected from the monitoring systems can be utilized in the analysis of AC interference studies...

... density (J_AC and J_DC) on the AC corrosion rate. AC Corrosion AC frequency AC Interference AC Mitigation Cathodic Protection CP Ground Bed Rectifier 120 Hz Frequency Interference Unfiltered Rectifier Corrosion Investigation Pipeline INTRODUCTION A 2018 AC corrosion...

... mechanism. The results are discussed in relation to literature and relevant cathodic protection and AC interference standards. AC corrosion AC interference cathodic protection corrosion rate INTRODUCTION AC corrosion is a topic that has gained a lot of attention in recent years, particularly...

... for involved processes, is discussed. Alternating current AC interference Cathodic protection Electrical Resistance Probes AC corrosion AC frequency INTRODUCTION The existing NACE ¹ SP21424-2018 standard on AC corrosion addresses typical power frequencies up to 60 Hz, and the studies...

... excavations, conducted an AC interference study, and developed an enterprise wide program focused on identifying, monitoring, and mitigating AC interference. The paper examines the results of each mitigative action and process adjustment taken by the operator. AC Corrosion ILI AC Interference Interference...

... soil conditions and AC interference is highly non-linear and challenging to model. This work expands upon prior work using a suite of machine learning tools to estimate corrosion rates. However, instead of estimating a single corrosion growth rate for a single girth weld address (GWA), this work...

... of the elevated AC current densities and quantify the associated corrosion risk. The mitigation strategy employed to address this risk is provided. AC Corrosion AC Interference AC Mitigation Cathodic Protection CP Ground Bed Rectifier Interference Unfiltered Rectifier Corrosion Investigation Pipeline...

... options and thus provided worst case results. Abstract Alternating Current (AC) interference affects pipelines collocated near high voltage transmission lines. While overhead high voltage transmission line collocations are common, underground high voltage transmission line collocations, while less common...

...Abstract The AC interference between High Voltage AC (HVAC) power lines and pipelines has been modeled with various software programs, all of which have a variety of input data which creates various results and outputs. Important aspects such as the soil resistivity along the pipeline route can...

...DATASETS USED FOR MODELING To train the Machine Learning models, a large array of different dependent variables including atmospheric conditions, human activity, and alternating current (AC) interference are included. Atmospheric Conditions Table 1 Quantities of Data with and without ILI...

...AC INTERFERENCE EVALUATION Based on the lead author experience with AC corrosion related failures, we have developed the following guidelines: AC induced corrosion does not occur at AC current densities less than 20 A/m²; (~ 1.86 A/ft²) AC corrosion is unpredictable for AC...

... to help alleviate elevated AC potentials. AC interference mitigation current density AC-influenced corrosion electrical resistance corrosion rate probe cathodic protection remote monitoring computer modeling simulations INTRODUCTION This paper presents four case histories relating to monitoring...

..., the effects of winter conditions on AC interference were assessed via a case study on a pipeline located in Canada in an area with a maximum frost penetration of 1.2 m. A mitigation system was designed to ensure that the safety and integrity risks are mitigated to acceptable levels, for both seasonal...

...There are many variables affecting the severity of AC interference on pipelines in the vicinity of HVAC transmission lines. Perhaps the variables which may contribute the most to AC interference for a given co-location are ³ : Abstract AC interference on pipelines in the nearby vicinity...

...According to the European Standard CEN/TS-15280:2013³, if AC voltage is higher than 15V, or AC current density is higher than 30 A/m², the pipeline is under AC interference risk. Therefore, AC mitigation for this gas pipeline is necessary. NUMERICAL MODELING AND AC MITIGATION...

... in relation to the AC and DC current densities. A field investigation of AC corrosion on an operational pipeline where AC interference and CP levels could be controlled, is presented. Soil analysis from the field study is discussed in relation to the laboratory experiments. Distinction between AC corrosion...

...AC interference AC harmonics induction in pipeline INTRODUCTION Where pipelines share the same right-of-way with the power line, there is considerable electromagnetic coupling between the power line and the pipeline. There has been significant work on this issue ^{1 , 2} , which has been...

... calculation, including AC interference risk evaluation, AC mitigation design and mitigation effectiveness assessment. Field tests were conducted to collect data along the pipeline right-of-way (ROW) and evaluate the risk of AC interference. Based on the collected information, a computing model was also...

...Abstract The research status of AC corrosion risk assessment criteria for cathodic protected carbon steel was introduced initially. Then AC interference experiments were carried out to study the effects of AC interference on cathodic protection (CP) parameters and corrosion behavior. The changes...