Effects of Electromagnetic Interference on Underground Pipelines Caused by the Operation of High Voltage AC Traction Systems: The Impact of Harmonics

Charalambous, Charalambos A.; Δημητρίου, Ανδρέας; Lazari, Antonis L.; Nikolaidis, Alexandros I.

doi:10.1109/tpwrd.2018.2803080

Cited by 44 publications

(22 citation statements)

References 17 publications

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“…The positions of the monitoring sites and the grounding electrodes are shown in Figure 1. magnitude of the grounding current, soil resistivity, and the distribution of insulation coating defects have a great influence on the corrosion of pipelines [6]. The corrosion of a pipeline varies with the magnitude of the grounding current: hydrogen evolution corrosion occurs when the grounding anode is discharged [10], while oxygen absorption corrosion occurs when the cathode is discharged [11].…”

Section: Selection Of Monitoring Sitesmentioning

confidence: 99%

“…In particular, the effects of an UHVDC grounding current on pipelines bring about stray current and pipe-to-soil potential (PSP) offset. When the PSP offset exceeds the standard or when the cathodic protection systems fail to operate effectively, the stray current generated by the grounding current will accelerate corrosion, reduce the service life of pipelines, and even cause explosions which may lead to heavy casualties and economic losses [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Based on the transmission line theory, the equivalent circuit model of pipelines was established and the distribution of the stray current and PSP was calculated [8,9]. The results show that the resistivity of the insulating coating is an important factor determining the corrosion of a pipeline; the buried depth of the grounding electrode has no influence on the corrosion of a pipeline [9]; and the magnitude of the grounding current, soil resistivity, and the distribution of insulation coating defects have a great influence on the corrosion of pipelines [6]. The corrosion of a pipeline varies with the magnitude of the grounding current: hydrogen evolution corrosion occurs when the grounding anode is discharged [10], while oxygen absorption corrosion occurs when the cathode is discharged [11].…”

Section: Introductionmentioning

confidence: 99%

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Observation Research on the Effect of UHVDC Grounding Current on Buried Pipelines

Liu

Jiang

et al. 2019

Energies

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In order to research the electromagnetic interference in buried oil and gas pipelines generated by the grounding current of a grounding electrode of Ultra High Voltage Direct Current (UHVDC) system, observation experiments of stray current and pipe-to-soil potential (PSP) in the pipeline were carried out. Monitoring devices were installed at two sites of the Dong-Huang oil pipeline before the commissioning of the Zalute–Qingzhou and Shanghaimiao–Shandong ±800 kV UHVDC projects. Monitoring data on the stray current and PSP of the two monitoring sites were obtained when the two UHVDC projects were operated in monopolar mode on 24 December 2017 and 2 January 2019 and the grounding current reached 6250 A. The amplitude characteristics of the stray current and PSP at different distances from the grounding electrode and the effects of the magnitude of the stray current and PSP on the cathodic protection system are analyzed herein. The results show that the effects of the grounding current on pipeline corrosion are not only closely related to the distance between the grounding electrode and the pipeline but are also related to the running state of the potentiostats of pipelines and the distance between insulation flanges. Optimizing the performance of potentiostats and the distribution of insulation flanges can reduce the effects of UHVDC grounding current on pipeline corrosion.

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Section: Selection Of Monitoring Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observation Research on the Effect of UHVDC Grounding Current on Buried Pipelines

Liu

Jiang

et al. 2019

Energies

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“…To avoid the electrochemical corrosion and minimize the densities of the induced current, an appropriate protection is essential for the underground metallic pipelines that are in permanent touch with the electrolyte solution of the ground [10]. Uncontrolled corrosion of the buried metallic supply pipelines can cause gas/oil spills with severe economic and ecological implications.…”

Section: Introductionmentioning

confidence: 99%

“…The level of induced voltage on the pipelines can be reduce to a safe range, according to the IEEE standard-80, by implementing an appropriate mitigation system [10]. The gradient control wire is considered one of the greatest mitigation systems of those that are widely applied [13,14].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Metallic Conductor Voltage Owing to Electromagnetic Coupling Via a Hybrid ANFIS and Backtracking Search Algorithm

et al. 2019

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The electromagnetic interference (EMI) generated by high voltage power systems can cause a serious problem for nearby electrically conductive structures, such as railroads, communication lines, or pipelines, that would place a system’s integrity and the operational safety of the structure at high level of risk. According to the IEEE standard-80, by implementing a well-designed mitigation system, the induced voltage on neighboring electrically conductive structure can reach a harmless level. The mitigation system can enhance the overall integrity of pipelines and provide higher operation safety for personal during working on the exposed parts of metallic pipelines or conductive appurtenances. An accurate prediction about the level of induced voltage is absolutely necessary to design a suitable mitigation system for metallic pipelines. Thus, in this work a hybrid prediction methodology composed of an adaptive neuro-fuzzy inference system (ANFIS) and a backtracking search algorithm (BSA) is developed to accurately predict the electromagnetic inference’s effects on metallic pipelines with shared right-of-way (RoW) and high voltage overhead lines (OHLs). Through the combination of BSA as a robust and efficient optimization algorithm in the learning process of an ANFIS approach, a hybrid data mining algorithm has been developed to predict the induced voltage on mitigated and unmitigated pipelines more accurately and reliably. The simulation results are validated by data sets observed from the Current Distribution, Electromagnetic Interference, Grounding and Soil Structure Analysis (CDEGS) software. From the simulation results it was confirmed that the proposed hybrid method is effective in accurately predicting the induced voltage on pipelines with changing system parameters. Furthermore, to evaluate the precision and applicability of the developed approach in this paper, its estimates are compared with the results obtained from an artificial neural network (ANN), a support vector regression (SVR) and an ANFIS optimized by other well-known optimization algorithms. The obtained results indicate higher accuracy of the developed hybrid method over other artificial intelligence based approaches.

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Fault diagnosis and location of electrified railway grounding grids based on intelligent algorithm

Chen

Liu

Zhao

et al. 2020

Int Trans Electr Energ Syst

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Faults in electrified railway grounding grids can lead to significant surface potential rise, which threatens railway transportation and operation security. In order to efficiently diagnose the grounding status of the grounding grid and locate the fault location, this paper firstly presents the development of a mathematical model to reveal the earth surface potential distribution of grounding grids. Furthermore, a simulation model is built specifically for this study using CDEGS software to calculate the earth surface potential distribution of grounding grids under fault conditions. The simulation model has been used to validate the developed mathematical model by a comparison study. Finally, an intelligent algorithm based on grey incidence degree and fuzzy theory is proposed. This algorithm facilitates the fault condition diagnosis and the fault conductor position location. Using the fault condition data calculated by the simulation model, a few common grounding grids' fault conditions are diagnosed and located effectively by the proposed method. The results identify that the proposed method can ensure the safe operation of the traction substation.

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Effects of Electromagnetic Interference on Underground Pipelines Caused by the Operation of High Voltage AC Traction Systems: The Impact of Harmonics

Cited by 44 publications

References 17 publications

Observation Research on the Effect of UHVDC Grounding Current on Buried Pipelines

Observation Research on the Effect of UHVDC Grounding Current on Buried Pipelines

Prediction of Metallic Conductor Voltage Owing to Electromagnetic Coupling Via a Hybrid ANFIS and Backtracking Search Algorithm

Fault diagnosis and location of electrified railway grounding grids based on intelligent algorithm

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