Advanced Analysis of HVDC Electrodes Interference on Neighboring Pipelines

Yu Gong¹, Chunlin Xue², Zhilei Yuan², Yexu Li³, Farid Paul Dawalibi³

¹China Southern Power Grid, Guangzhou, China.
²Huadong Power Design Institute, Shanghai, China.
³Safe Engineering Services & Technologies ltd., Laval, Quebec, Canada.

DOI: 10.4236/jpee.2015.34045                

Abstract

This paper focuses on advanced analysis techniques and design considerations of DC interference generated by HVDC electrodes during normal bipolar and temporary monopolar operations on neighboring metallic utilities, with a special emphasis on buried gas and oil pipelines. This study examines the level of pipeline corrosion, the safety status in the vicinity of exposed appurtenances and the impact of DC interference on the integrity of insulating flanges and impressed current cathodic protection (ICCP) systems. Computation results obtained for different soil models show that different soils can lead to completely different DC interference effects. The results and conclusions presented here can be used as a reference to analyze the severity of DC interference on pipelines due to proximate HVDC electrodes.

Keywords

HVDC Electrode, DC Interference, Pipe-to-Soil Potential, Polarization Potential, Insulating Joint (Flanges), Rectifier, Touch Voltage, Corrosion, Safety, Impressed Current Cathodic Protection

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	BS/EN50162-2004 (2005) Protection against Corrosion by Stray Current from Direct Current Systems. British-Adopted European Standard.
[2]	GB/T21447-2008 (2008) Specification for External Corrosion Control for Steel Pipeline. Chinese National Standard.
[3]	NACE SP0169-2013 (2013) Control of External Corrosion on Underground or Submerged Metallic Piping Systems. NACE.
[4]	Peabody, A.W. and Siegfried, C.G. (1974) Corrosion Control Problems and Personnel Hazard Control Problems Caused by HVDC and HVAC Transmission Systems on Non-Associated Underground Facilities. CIGRE International Conference on Large High Voltage Electric Systems.