Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method

Huzainie Shafi, Tashia M. Anthony, Ahmad Basri, Avinash Raj, Chandan Kumar Chakrabarty

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Tangent delta measurement is a well-known diagnostic used by many utilities for condition assessment. Guides on field diagnostic testing are well established by North American society through IEEE standards and guideline. Tangent delta, also called loss angle or dissipation factor (δ) measurement, is a diagnostic method of testing underground cables to determine the quality of the cable insulation in which value from the measurement will be used to compute dielectric loss within the cable insulation system. The higher the dielectric loss thus creates higher localized heating which leads to insulation degradation. However, dielectric loss measurement test technique is a global or bulk insulation condition assessment. It gives an overall condition of the complete cable system that includes cable, joints and terminations. A good dielectric loss result thus means that the overall condition of the complete cable system is in good condition whereas such high dielectric loss will just give unhealthy indication of the overall condition of the cable without revealing the weakness component within the insulation system. It is important to distinguish the dielectric loss of cable and its accessories within the system for the ease of maintenance works and such knowledge is an added advantage and greatly needed by the network owner. This paper presents the method of determining the tangent delta of cable joint from the total overall or bulk tangent delta measurement by using higher frequencies (>100Hz) at voltages above 1 kV. In this direct measurement method, the current (I), voltage (V) and phase (θ) were obtained by connecting a linear high voltage probe across the cable cross-section. The phasor diagram is then constructed and by some trigonometric exercises the actual phase across the joint is extracted. Hence, the tangent delta values were calculated.

Original languageEnglish
Title of host publicationPECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages306-310
Number of pages5
ISBN (Electronic)9781509025473
DOIs
Publication statusPublished - 16 Jun 2017
Event6th IEEE International Conference on Power and Energy, PECON 2016 - Melaka, Malaysia
Duration: 28 Nov 201629 Nov 2016

Other

Other6th IEEE International Conference on Power and Energy, PECON 2016
CountryMalaysia
CityMelaka
Period28/11/1629/11/16

Fingerprint

Cables
Dielectric losses
Insulation
Electric potential
Underground cables
Accessories
Testing
Heating
Degradation

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Fuel Technology

Cite this

Shafi, H., Anthony, T. M., Basri, A., Raj, A., & Kumar Chakrabarty, C. (2017). Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method. In PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding (pp. 306-310). [7951578] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PECON.2016.7951578
Shafi, Huzainie ; Anthony, Tashia M. ; Basri, Ahmad ; Raj, Avinash ; Kumar Chakrabarty, Chandan. / Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method. PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 306-310
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abstract = "Tangent delta measurement is a well-known diagnostic used by many utilities for condition assessment. Guides on field diagnostic testing are well established by North American society through IEEE standards and guideline. Tangent delta, also called loss angle or dissipation factor (δ) measurement, is a diagnostic method of testing underground cables to determine the quality of the cable insulation in which value from the measurement will be used to compute dielectric loss within the cable insulation system. The higher the dielectric loss thus creates higher localized heating which leads to insulation degradation. However, dielectric loss measurement test technique is a global or bulk insulation condition assessment. It gives an overall condition of the complete cable system that includes cable, joints and terminations. A good dielectric loss result thus means that the overall condition of the complete cable system is in good condition whereas such high dielectric loss will just give unhealthy indication of the overall condition of the cable without revealing the weakness component within the insulation system. It is important to distinguish the dielectric loss of cable and its accessories within the system for the ease of maintenance works and such knowledge is an added advantage and greatly needed by the network owner. This paper presents the method of determining the tangent delta of cable joint from the total overall or bulk tangent delta measurement by using higher frequencies (>100Hz) at voltages above 1 kV. In this direct measurement method, the current (I), voltage (V) and phase (θ) were obtained by connecting a linear high voltage probe across the cable cross-section. The phasor diagram is then constructed and by some trigonometric exercises the actual phase across the joint is extracted. Hence, the tangent delta values were calculated.",
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Shafi, H, Anthony, TM, Basri, A, Raj, A & Kumar Chakrabarty, C 2017, Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method. in PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding., 7951578, Institute of Electrical and Electronics Engineers Inc., pp. 306-310, 6th IEEE International Conference on Power and Energy, PECON 2016, Melaka, Malaysia, 28/11/16. https://doi.org/10.1109/PECON.2016.7951578

Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method. / Shafi, Huzainie; Anthony, Tashia M.; Basri, Ahmad; Raj, Avinash; Kumar Chakrabarty, Chandan.

PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding. Institute of Electrical and Electronics Engineers Inc., 2017. p. 306-310 7951578.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Shafi H, Anthony TM, Basri A, Raj A, Kumar Chakrabarty C. Extraction of cable joints tangent delta from bulk tangent delta measurement using HFAC method. In PECON 2016 - 2016 IEEE 6th International Conference on Power and Energy, Conference Proceeding. Institute of Electrical and Electronics Engineers Inc. 2017. p. 306-310. 7951578 https://doi.org/10.1109/PECON.2016.7951578