Transmission Mains Earthing Design: Under Ground to Over Head Pole Transition
The demand on High voltage (HV) infrastructures is growing due to the corresponding growth in industries and population. New or upgraded HV infrastructure has safety implications since Transmission mains usually occupy the same easement in the vicinity of neighbouring residents. Transmission mains consist of underground (UG) and overhead (OH) sections and the transition between the UG and OH section is known as the UGOH pole. The existence of two transmission mains in the same easement can dictate to resort to more complicated earthing design in order to mitigate the effect of AC interference, and in some cases it can also necessitates completing a Split Study of the system. This paper provides an overview of the AC interference, Split Study and the earthing of an underground feeder including the UGOH pole .In addition, this paper discusses the use of different link boxes on the UG feeder and presents a case study that represent a clear example of the Ac interference and Split factor. Finally, a few recommendations are provided to achieve a safety zone in the area beyond the boundary of the HV system.
[1] IEEE guide to safety in AC substation grounding, 2000- (IEEE, New
York, 2000).
[2] Hellany A, Nagrial M, Jamal R, Nassereddine M, 2011, Soil Resistivity
Structure and its implication on the Earth Grid of HV substation, World
Academy of Science, Engineering and Technology 60 2011, vol 2011,
no. 60, pp 1322-1326
[3] Nassereddine M, Hellany A, 2009, AC Interference Study on Pipeline:
the Impact of the OHEW under Full Load and Fault Current, Proceeding
in the 2009 International Conference on Computer and Electrical
Engineering, pp 497-501.
[4] Nassereddine M, Hellany A, Nagrial M, "Analysis of the impact of the
OHEW under full load and fault current" 2010, International Jurnal of
Energy and Environment (IJEE), Volume 1, Issue 4, pp. 727-736.
[5] IEEE guide to safety in AC substation grounding, 2000- (IEEE, New
York, 2000).
[6] Hellany A, Nagrial M, Jamal R, Nassereddine M, 2011, Soil Resistivity
Structure and its implication on the Earth Grid of HV substation, World
Academy of Science, Engineering and Technology 60 2011, vol 2011,
no. 60, pp 1322-1326
[7] Nassereddine M, Hellany A, 2009, AC Interference Study on Pipeline:
the Impact of the OHEW under Full Load and Fault Current, Proceeding
in the 2009 International Conference on Computer and Electrical
Engineering, pp 497-501.
[8] Nassereddine M, Hellany A, Nagrial M, "Analysis of the impact of the
OHEW under full load and fault current" 2010, International Jurnal of
Energy and Environment (IJEE), Volume 1, Issue 4, pp. 727-736.
[9] Hellany A, Nassereddine M, Rizk J, 2009, How to design an effective
earthing system to ensure the safety of the people, 2009 International
Conference on Advances in Computational Tools for Engineering
Applications, pp 416-421.
[10] Nassereddine M, Hellany A. "OHEW Earthing Design Methodology of
Traction Substation" 2010 World Academy of Science, engineering and
Technology, Vol 66, no. 0, pp 1644-1648, ISSN 2070-66, (ORS
ID:217809)
[11] AS/NZS 4853:2000 electrical hazards on metallic pipelines
[12] Hellany A, Nassereddine M, Nagrial M. Rizk J. " Safety Compliance of
Substation Earthing Design" 2011 World Academy of Science,
engineering and Technology , Vol 60, pp 525-529.
[13] Nassereddine M. Hellany A. "Earthing Design Improvement:
Correlation Between Design and Construction" 2010 World Academy of
Science, engineering & Technology, no. 66, pp 1364-1367, ISSN2070-
66.
[14] C.N. Chang, "computation of current-division factors and assessment of
earth-grid safety at 161/69kV indoor-type and outdoor-type substations"
IEE proc.-Gener. Transm. Distrib., Vol. 152, No. 6, November 2005.
[15] A. Campoccia, "A method to evaluate voltages to earth during an earth
fault in an HV network in a system of interconnected earth electrodes of
MV/LV substations" IEEE transactions on power delivery,Vol 23, No.
4, Oct 2008
[16] S. Mangione, "A simple method for evaluation ground fault current
transfer at the transition station of a combined overhead-cable line",
IEEE transaction on power delivery, Vol, 23, No, 3, July 2008
[17] E. Viel, "Fault current distribution in HV cable systems" IEE proc-
Gener. Transmission distribution, Vol. 147, No. 4, July 2000
[18] F. Dawalibi, " Measurements and computations of fault current
distribution on overhead transmission lines" IEEE on transactions on
power apparatus and systems, Vol. PAS-103, No. 3, March 1984.
[1] IEEE guide to safety in AC substation grounding, 2000- (IEEE, New
York, 2000).
[2] Hellany A, Nagrial M, Jamal R, Nassereddine M, 2011, Soil Resistivity
Structure and its implication on the Earth Grid of HV substation, World
Academy of Science, Engineering and Technology 60 2011, vol 2011,
no. 60, pp 1322-1326
[3] Nassereddine M, Hellany A, 2009, AC Interference Study on Pipeline:
the Impact of the OHEW under Full Load and Fault Current, Proceeding
in the 2009 International Conference on Computer and Electrical
Engineering, pp 497-501.
[4] Nassereddine M, Hellany A, Nagrial M, "Analysis of the impact of the
OHEW under full load and fault current" 2010, International Jurnal of
Energy and Environment (IJEE), Volume 1, Issue 4, pp. 727-736.
[5] IEEE guide to safety in AC substation grounding, 2000- (IEEE, New
York, 2000).
[6] Hellany A, Nagrial M, Jamal R, Nassereddine M, 2011, Soil Resistivity
Structure and its implication on the Earth Grid of HV substation, World
Academy of Science, Engineering and Technology 60 2011, vol 2011,
no. 60, pp 1322-1326
[7] Nassereddine M, Hellany A, 2009, AC Interference Study on Pipeline:
the Impact of the OHEW under Full Load and Fault Current, Proceeding
in the 2009 International Conference on Computer and Electrical
Engineering, pp 497-501.
[8] Nassereddine M, Hellany A, Nagrial M, "Analysis of the impact of the
OHEW under full load and fault current" 2010, International Jurnal of
Energy and Environment (IJEE), Volume 1, Issue 4, pp. 727-736.
[9] Hellany A, Nassereddine M, Rizk J, 2009, How to design an effective
earthing system to ensure the safety of the people, 2009 International
Conference on Advances in Computational Tools for Engineering
Applications, pp 416-421.
[10] Nassereddine M, Hellany A. "OHEW Earthing Design Methodology of
Traction Substation" 2010 World Academy of Science, engineering and
Technology, Vol 66, no. 0, pp 1644-1648, ISSN 2070-66, (ORS
ID:217809)
[11] AS/NZS 4853:2000 electrical hazards on metallic pipelines
[12] Hellany A, Nassereddine M, Nagrial M. Rizk J. " Safety Compliance of
Substation Earthing Design" 2011 World Academy of Science,
engineering and Technology , Vol 60, pp 525-529.
[13] Nassereddine M. Hellany A. "Earthing Design Improvement:
Correlation Between Design and Construction" 2010 World Academy of
Science, engineering & Technology, no. 66, pp 1364-1367, ISSN2070-
66.
[14] C.N. Chang, "computation of current-division factors and assessment of
earth-grid safety at 161/69kV indoor-type and outdoor-type substations"
IEE proc.-Gener. Transm. Distrib., Vol. 152, No. 6, November 2005.
[15] A. Campoccia, "A method to evaluate voltages to earth during an earth
fault in an HV network in a system of interconnected earth electrodes of
MV/LV substations" IEEE transactions on power delivery,Vol 23, No.
4, Oct 2008
[16] S. Mangione, "A simple method for evaluation ground fault current
transfer at the transition station of a combined overhead-cable line",
IEEE transaction on power delivery, Vol, 23, No, 3, July 2008
[17] E. Viel, "Fault current distribution in HV cable systems" IEE proc-
Gener. Transmission distribution, Vol. 147, No. 4, July 2000
[18] F. Dawalibi, " Measurements and computations of fault current
distribution on overhead transmission lines" IEEE on transactions on
power apparatus and systems, Vol. PAS-103, No. 3, March 1984.
@article{"International Journal of Electrical, Electronic and Communication Sciences:57305", author = "A. Hellany and M. Nassereddine and M. Nagrial and J. Rizk", title = "Transmission Mains Earthing Design: Under Ground to Over Head Pole Transition", abstract = "The demand on High voltage (HV) infrastructures is growing due to the corresponding growth in industries and population. New or upgraded HV infrastructure has safety implications since Transmission mains usually occupy the same easement in the vicinity of neighbouring residents. Transmission mains consist of underground (UG) and overhead (OH) sections and the transition between the UG and OH section is known as the UGOH pole. The existence of two transmission mains in the same easement can dictate to resort to more complicated earthing design in order to mitigate the effect of AC interference, and in some cases it can also necessitates completing a Split Study of the system. This paper provides an overview of the AC interference, Split Study and the earthing of an underground feeder including the UGOH pole .In addition, this paper discusses the use of different link boxes on the UG feeder and presents a case study that represent a clear example of the Ac interference and Split factor. Finally, a few recommendations are provided to achieve a safety zone in the area beyond the boundary of the HV system.
", keywords = "UGOH, High Voltage, AC interference, Earthing
Design.", volume = "6", number = "12", pages = "1478-6", }
