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Field-Testing Procedures on a Metallic Pipeline Collocated with an HVDC Powerline

Picture for Field-Testing Procedures on a Metallic Pipeline Collocated with an HVDC Powerline
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Development of this strategy began after a steel pipeline, coated with Fusion Bonded Epoxy (FBE), was constructed in a collocated right-of-way (ROW) with a high voltage direct current (HVDC) Powerline. Area Cathodic Protection (CP) Technicians reported challenges in recording stable DC Pipe-to-Soil (P/S) Potentials due to rapid fluctuations observed in the DC waveform. In addition, CP technicians recorded DC line current concurrently with P/S potentials and found that there was a correlation between the two.

Product Number: 51323-19035-SG
Author: Andrew Mackey, Alex Ristow
Publication Date: 2023
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$20.00
$20.00

Effective assessment of risk to pipeline integrity requires confidence in data and engineering analysis. The current body of literature on high voltage direct current (HVDC) influence on pipelines during steady state operation is limited. This paper presents an approach for data gathering and field-testing when a metallic pipeline is collocated with a suspended HVDC electric power transmission line to determine if influence seen is from the transmission line, as well as to aid in analysis of risk to pipeline integrity.


This paper identifies challenges and practices for data gathering, test planning, and data processing. Repeating these testing procedures as the HVDC powerline is in normal operation, monopole, and shutdown modes offers the opportunity to develop a complete dataset, providing information regarding cathodic protection (CP) efficacy during all HVDC conditions. Placement of testing equipment is determined by proximity of HVDC and pipeline system installations, HVDC grounding locations, and soil/terrain conditions. Synchronization of the time stamps from the resulting field-testing data with the HVDC operational load data is a critical component of the data processing step. Further engineering analysis is required to determine if additional monitoring or further investigation should be performed to determine any risk to pipeline integrity or if the influence is a measurement error concern.

Effective assessment of risk to pipeline integrity requires confidence in data and engineering analysis. The current body of literature on high voltage direct current (HVDC) influence on pipelines during steady state operation is limited. This paper presents an approach for data gathering and field-testing when a metallic pipeline is collocated with a suspended HVDC electric power transmission line to determine if influence seen is from the transmission line, as well as to aid in analysis of risk to pipeline integrity.


This paper identifies challenges and practices for data gathering, test planning, and data processing. Repeating these testing procedures as the HVDC powerline is in normal operation, monopole, and shutdown modes offers the opportunity to develop a complete dataset, providing information regarding cathodic protection (CP) efficacy during all HVDC conditions. Placement of testing equipment is determined by proximity of HVDC and pipeline system installations, HVDC grounding locations, and soil/terrain conditions. Synchronization of the time stamps from the resulting field-testing data with the HVDC operational load data is a critical component of the data processing step. Further engineering analysis is required to determine if additional monitoring or further investigation should be performed to determine any risk to pipeline integrity or if the influence is a measurement error concern.

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Study on the Mechanism and Influencing Factors of High Voltage Direct Current Interference

Product Number: 51317--9293-SG
ISBN: 9293 2017 CP
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Publication Date: 2017
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High voltage direct current (HVDC) transmission results in a large direct current will into the earth. This may cause interference on a buried pipeline even though it is far from the earth electrode. In this work, numerical simulation was used to study the mechanism and influencing factors of HVDC interference.
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51318-10913-Inductive Interference from HVDC Transmission Lines on Close Proximity Pipeline Segments

Product Number: 51318-10913-SG
Author: Boshra Momen Nejad / Levi Blumhagen
Publication Date: 2018
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The main purpose of this joint industrial R&D project was to perform detailed field measurements on selected pipeline segments in close vicinity to a High Voltage Direct Current (HVDC) transmission line during planned staged fault tests on the power line.
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Inductive and DC Stray Current Interference from Different HVDC Transmission Line Systems on Metallic Pipelines

Product Number: 51323-18925-SG
Author: Boshra Momen Nejad, Brandon Miller
Publication Date: 2023
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Back in 2018, we published a paper on a joint industrial R&D project, during which we performed detailed field measurements on selected pipeline segments in close vicinity to a High Voltage Direct Current (HVDC) transmission line during planned staged fault tests on the power line. Induced voltages on these pipelines were recorded during the HVDC staged fault process, which was conducted by the utility company. The measurement results from these tests were used for further validation or modification of an existing industrial guideline that focuses on the influence of HVDC power lines on metallic pipelines. Verification of future modeling results was another expected outcome of this study.
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