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03705 A User-friendly Simulation Software for AC Predictive and Mitigation Techniques

Picture for 03705 A User-friendly Simulation Software for AC
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Close proximity of high voltage lines and metallic pipelines becomes more frequent. This paper presents a recently developed simulation software to facilitate prediction and  mitigation. Flexible (no limitation on number of pipes, transmission lines, bonds, groundings, coating and soil resistivity), user-friendly and robust.

Product Number: 51300-03705-SG
ISBN: 03705 2003 CP
Author: Leslie Bortels, Calin Munteanu, Vasile Topa, Johan Deconinck
Publication Date: 2003
Industries: Energy Generation , Cathodic Protection
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Cases of close proximity of high voltage transmission lines and metallic pipelines become more and more frequent. Therefore, there is a growing concern about possible hazards resulting from the influence of electrical systems: safety of people making contact with the pipeline, damage to the pipeline and to the cathodic protection equipment. Hence it is not surprising that there is an industrial need for the availability of a user-friendly simulation software that provides capabilities for predicting and mitigating inductively coupled voltages. This paper presents a recently developed simulation software tool that can handle this kind of problem. The software can deal with any configuration (no limitation on number of pipes, transmission lines, bonds, groundings, coating and soil resistivity) and is very user-friendly and robust since no a priori subdivision between pipe sections parallel or not to the transmission line(s) needs to be made. With the obtained values for the EMF, the induced voltages and currents are then calculated by solving the well-known transmission line model using a numerical technique that allows to specify the pipeline parameters (diameter, coating, soil resistivity, …) for each individual section of the pipeline. In this paper, simulation results will be presented and compared with available theoretical test cases. It will be demonstrated that the calculated values for the induced electromotive force (EMF) and the induced voltage and current are in perfect agreement with these theoretical test cases. In addition, it will be proven that commonly used formula’s for the induced EMF need to be handled with care, especially when the distance between the transmission line and the pipeline becomes bigger.

Keywords: simulation software, HVAC, induced EMF, induced voltages, mitigation techniques

Cases of close proximity of high voltage transmission lines and metallic pipelines become more and more frequent. Therefore, there is a growing concern about possible hazards resulting from the influence of electrical systems: safety of people making contact with the pipeline, damage to the pipeline and to the cathodic protection equipment. Hence it is not surprising that there is an industrial need for the availability of a user-friendly simulation software that provides capabilities for predicting and mitigating inductively coupled voltages. This paper presents a recently developed simulation software tool that can handle this kind of problem. The software can deal with any configuration (no limitation on number of pipes, transmission lines, bonds, groundings, coating and soil resistivity) and is very user-friendly and robust since no a priori subdivision between pipe sections parallel or not to the transmission line(s) needs to be made. With the obtained values for the EMF, the induced voltages and currents are then calculated by solving the well-known transmission line model using a numerical technique that allows to specify the pipeline parameters (diameter, coating, soil resistivity, …) for each individual section of the pipeline. In this paper, simulation results will be presented and compared with available theoretical test cases. It will be demonstrated that the calculated values for the induced electromotive force (EMF) and the induced voltage and current are in perfect agreement with these theoretical test cases. In addition, it will be proven that commonly used formula’s for the induced EMF need to be handled with care, especially when the distance between the transmission line and the pipeline becomes bigger.

Keywords: simulation software, HVAC, induced EMF, induced voltages, mitigation techniques

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