Investigation of nanocomposite polypropylene for DC capacitors: A feasibility study

Gian Carlo Montanari, Paolo Seri, Mikko Karttunen, Mika Paajanen, Kari Lahti, Ilkka Rytöluoto

    Research output: Contribution to journalArticleScientificpeer-review

    1 Citation (Scopus)


    This paper presents a preliminary feasibility investigation, in the framework of a recent European project, GRIDABLE, aiming at the development of nanostructured Polypropylene, PP, materials as insulation for DC LV-MV capacitors and MV-HV cables. Results of electrical property characterization of various types of PP-SiO 2 materials for DC capacitors are presented in this paper, focusing on breakdown strength and space charge measurements. They indicate that the nanofiller may influence the degradation rate of materials, modifying the space charge accumulation dynamics and extent, as well as the threshold field value for space charge accumulation. Statistical analysis of breakdown voltage shows that the presence of nanoparticles may also improve noticeably the breakdown behavior.

    Original languageEnglish
    Pages (from-to)105-112
    JournalThe transactions of the Institute of Electrical Engineers of Japan A
    Issue number2
    Publication statusPublished - 2019
    MoE publication typeA1 Journal article-refereed


    This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 720858.


    • Capacitor
    • DC cable
    • HVDC
    • Nanocomposite
    • SiO
    • Space charge


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