The effects of semicon on space charge behavior under different temperature conditions for HVDC cable insulation

M. Hao, Adnan Fazal, A. S. Vaughan, G. Chen, Haitian Wang, C. Zhang, Y. Zhou

    Research output: Chapter in Book/Report/Conference proceedingConference proceedingpeer-review


    One of the major concerns related to HVDC applications is the presence of space charge within the dielectrics, which distorts the electric field distribution and contributes to accelerated ageing and consequent failure of the cable insulation. In this paper, an attempt is made to explore the space charge characteristics using different electrode materials and temperature conditions to highlight the variation in space charge formation and distribution in the system using pulsed electro acoustic (PEA) technique. To simulate a real cable manufacturing process, XLPE insulation was sandwiched between two layers of thermal bonded semicon material. The experimental results revealed that the semiconductive materials has a greater influence on the space charge formation. It was found the electrode materials play a vital role in determining the charge distribution in the insulation and significant dependence on the electrode materials under the same applied stress and temperature conditions. Thermal bonded semicon samples have a stronger charge injection and greater charge amount within the bulk and high temperature can greatly increase the charge mobility for both polarities as well as enhances charge injection. These findings are discussed in conjunction with unbonded sample (conventional setup) for the space charge measurements.
    Original languageEnglish
    Title of host publication2nd Cigre International Conference on HVDC
    Place of PublicationChina
    Number of pages6
    Publication statusPublished - Oct 2016
    EventHVDC2016: The 2nd International Conference on HVDC - Shanghai, China
    Duration: 25 Oct 201627 Oct 2016


    ConferenceHVDC2016: The 2nd International Conference on HVDC
    Abbreviated titleHVDC2016
    Internet address


    • Space charge
    • PEA
    • XLPE
    • HVDC cable
    • semiconducting material
    • charge injection


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