Skip to main content
SpringerLink
Log in

Insulation Solutions for HVAC to HVDC Conversion of a High Voltage Transmission Overhead Line: The L7 Tower Case Study

  • Conference paper
  • First Online:
Proceedings of the 21st International Symposium on High Voltage Engineering (ISH 2019)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 599))

Included in the following conference series:

  • 2253 Accesses

Abstract

This paper presents two insulation solutions for an AC to DC power transmission line conversion. The purpose is to maximise active power of both solutions, by maximising voltage. The method includes High Voltage Direct Current (HVDC) scheme selection, insulation dimensioning for HVDC energisation in polluted environments and switching surge overvoltage clearance calculation.

The intended readers are HVDC Outdoor Insulation Scientists and Engineers, and Transmission System Operators (TSOs), looking for economically viable solutions to increase the power transfer capability of the power system. They will benefit by learning a proposed comprehensive framework method to convert an AC transmission line to DC.

This method has been implemented for the case study of a 132 kV line to line double AC circuit supported by a typical transmission tower. The theoretical and simulation results show in detail that a substantial increase of the power transfer capability of the line may be achieved. However, further investigation is needed.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Abbreviations

AD :

Arcing Distance in millimetres (mm)

B, α, θ :

parameters dependent on shed material

C :

Clearance Distance in metres (m)

C a :

factor for FOV dependence on H

CD :

Creepage Distance in millimetres (mm)

C D :

factor for FOV dependence on D

CF :

Creepage Factor

CUR :

Contamination Uniformity Ratio between bottom and top of the insulator sheds

D :

Insulator shed diameter in millimetres (mm)

ESDD m :

measured Equivalent Salt Deposit Density in grams per square centimetre (g/cm2)

FOV :

Flashover Voltage in kilovolts (kV)

H :

Line altitude above sea level in metres (m)

HTM :

Hydrophobicity Transfer Material

ICA :

Insulated Cross-Arm

K C :

factor for the type of salt considered

K CUR :

CUR factor

K D :

factor for FOV dependence on the collected pollution, as function of D

K N :

factor for FOV dependence on NSDD

K P :

factor for ESDDAC to ESDDDC conversion, to be used cautiously. Explained in Table 1

Table 1. KP values, depending on climate and environment
Full size table
K S :

safety factor which considers the worse performance of a minority of insulators

LRSI :

Long-Rod Suspension Insulator

N :

number of insulators of the line

NSDD :

Non-Soluble Deposit Density in grams per square centimetre (g/cm2)

OHL :

Overhead Line

P :

Active Power in watts (W)

PU :

Switching surge peak over U ratio

U :

Pole to ground voltage in volts (V), usually preceded by ±

USCD :

Unified Specific Creepage Distance in millimetres per kilovolt (mm/kV)

References

  1. CIGRE WG C4.303, Outdoor insulation in polluted conditions: guidelines for selection and dimensioning - Part 2: the DC case. TB 518. CIGRE, December 2012

    Google Scholar 

  2. CIGRE WG B2.41, Guide to the conversion of existing AC lines to DC operation. Technical Brochure 583. CIGRE, May 2014

    Google Scholar 

  3. Electric Power Research Institute, EPRI, AC-to-DC Power Transmission Line Conversion, November 2010

    Google Scholar 

  4. National Electric Safety Code NESC, Part 2, Section 23, C2-2017. IEEE (2017)

    Google Scholar 

  5. CIGRE TF 33.04.01, Polluted insulators: a review of current knowledge. TB 158. CIGRE, June 2000

    Google Scholar 

  6. Oak Ridge National Laboratory (ORNL), HVDC Power Transmission Technology Assessment, April 1997

    Google Scholar 

Download references

Acknowledgments

The author would like to thank Bognár Alajos from FCI company for technical information, and Johan Maricq from Elia, Belgium TSO for the provided contact.

Author information

Authors and Affiliations

  1. Cardiff University, Queens Building, Cardiff, UK

    Davide Pinzan, M. El A. Slama & A. Haddad

  2. National Grid Headquarters, Warwick, UK

    Oliver Cwikowski

Authors
  1. Davide Pinzan
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. El A. Slama
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Oliver Cwikowski
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Haddad
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Davide Pinzan .

Editor information

Editors and Affiliations

  1. High Voltage Laboratory, Budapest University of Technology and Economics, Budapest, Hungary

    Bálint Németh

Rights and permissions

Reprints and permissions

Copyright information

© 2020 Springer Nature Switzerland AG

About this paper

Check for updates. Verify currency and authenticity via CrossMark

Cite this paper

Pinzan, D., Slama, M.E.A., Cwikowski, O., Haddad, A. (2020). Insulation Solutions for HVAC to HVDC Conversion of a High Voltage Transmission Overhead Line: The L7 Tower Case Study. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_130

Download citation

  • DOI: https://doi.org/10.1007/978-3-030-31680-8_130

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-31679-2

  • Online ISBN: 978-3-030-31680-8

  • eBook Packages: EngineeringEngineering (R0)

Publish with us

Policies and ethics

Search

Navigation