Analysis, Modeling and Optimization Earthing System of Oil Storage Tanks

Document Type : Applied Science

Authors

1 Senior Electrical Engineer, Iranian Oil Pipeline and Telecommunication Company

2 Assistant Professor, Islamic Azad University of Khomeini Shahr, Esfahan, Iran

Abstract

Earthing and protection of oil and gas storage tanks has always been one of the most challenging issues in the field of electrical engineering. Due to the high area of the tanks and its surroundings and the possibility of creating high step and touch voltages caused by lightning and passing its current and creating hazard for equipments and people around, as well as many fires that occur due to lightning and electrical charges in oil tanks, the need to study and research the grounding system of oil storage tanks is necessary. In this article, first, the existing design of a sample oil reservoirs in Said Beheshti Transportation Center and facilities of Isfahan Oil Pipelines and Telecommunications Company is discussed and critiqued. It has been computerized in CYMGDR and the values of step and touch voltages, as well as ground grid resistance value have been obtained and then compared with the standard values. The existing plan disadvantages have been studied and an optimal design is selected and recommended according to the environmental conditions and observations. Then, the current instructions for protection against lightning and static electricity in different standards have been studied and different methods of dealing with fire hazards of tanks have been reviewed and compared with existing tank conditions. Finally, some recommendations for optimizing the grounding and bonding of different tank components have been represented.

Keywords

References

 [1] شاهرخ شجاعیان، «نفوذ به عمق زمین»، نشر دانش پژوهان برین، اصفهان، 1392.
[2] CYMGRD 6.3 for windows, "CymGrd User guide and reference manual", 2006.
[3] IEEE Std 81, "IEEE guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System",2012.
[4] IEEE Std 80," IEEE Guide for Safety in AC Substation Grounding", 2013.
[5] NFPA 780,"Standard for the Installation of Lightning Protection Systems", 2017 Edition.
[6] API RP 545, "Lightning Protection of Aboveground Storage Tanks for Flammable or Combustible Liquids", 2012.
[7] API 2003, "Protection against Ignitions Arising out of Static, Lightning, and Stray Currents", 1998.
[8] IEC 61000-5-2,"Electromagnetic compatibility (EMC) Installation and mitigation guidelines Earthing and cabling", 1998.
[9] IPS-E-EL100, "Engineering Standard for Electrical System Design (Industrial and Non-Industrial) ", First Edition, 2012.
[10] API 650, "Welded Tanks for Oil Storage", 2014.
[11] NFPA 77, "Recommended Practice on Static Electricity", Edition 2014.
[12] BS 7430, "Code of practice for protective earthing of electrical installations", 2011.
[13] Lanzoni, J, "Improving Lightning Safety of Petroleum Storage Tanks", Lightning Eliminators & Consultants, Inc. Boulder, Colorado USA, October 2009.
[14] Tyurenkov, S and Lanzoni, J, "Foreign Experience Whit Lightning In Oil & Gas Industry", Science and Technology of Pipeline Petroleum Products, 2010.
[15] Ç. KÖKSAL, Ö. GÜL, "Analysis of wind turbine grounding systems in terms of touch and step voltage", IU-JEEE, Vol. 15, No. 1, pp. 1867-1872, 2015.
Farayandno
Volume 15, Issue 70 - Serial Number 70
September 2020
Pages 64-79

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