Failure of underground cables due to electrical treeing phenomena, i.e. formation of electrical discharges in the imperfections of cable insulation, is a major problem faced by electrical utilities. Many research works on nanocomposites are being carried out to improve the electrical treeing resistance of the XLPE cable insulation material. Technological advancements in communication and data analytic systems have shown the way for implementing online continuous partial discharge (PD) monitoring systems for high voltage apparatus. Hence collection of PD database of XLPE nanocomposites in the laboratory during entire electrical tree growth process is important for implementing efficient condition monitoring systems and relatively little work has been published in this area. In this work, PD characteristics of XLPE nanocomposites with 1, 3, 5 and 10 wt% silica were investigated. Electrical tree growth and corresponding phase resolved PD (PRPD) pattern were analysed with respect to time. Cluster analysis of equivalent time–frequency mapping of PD signals was carried out with respect to tree growth time period. Statistical analysis was performed for the entire set of PD data. Results show that cluster analysis of T–F map of PD data is useful in estimating early failure of insulating material due to treeing. Addition of silica nano fillers in the range of 3–5 wt% concentration significantly improves the PD resistance and breakdown time of XLPE material.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Chen X, Xu Y, Cao X, Dodd SJ, Dissado LA (2011) Effect of tree channel conductivity on electrical tree shape and breakdown in XLPE cable insulation samples. IEEE Trans Dielectr Electr Insul 18(3):847–860
Jung C-K (2014) Insulation design and reliability evaluation of ± 80 kV HVDC XLPE cables. J Electr Eng Technol 9(3):1002–1008
Liu Y-P, Liu H-C (2017) Influence of endurance tests on space charge distribution of 160 kV HVDC XLPE cable. J Electr Eng Technol 12(1):302–309
Zheng X, Chen G (2008) Propagation mechanism of electrical tree in XLPE cable insulation by investigating a double electrical tree structure. IEEE Trans Dielectr Electr Insul 15(3):800–807
Anil Kumar R, Deepa S, Mishra AK, Sarathi R (2003) Investigation into the failure of XLPE cables due to electrical treeing: a physico chemical approach. Polym Test 22:313–318
Sarathi R, Nandini A, Danikas MG (2011) Understanding electrical treeing phenomena in XLPE cable insulation adopting UHF technique. J Electr Eng 62(2):73–79
Chen G, Tham CH (2009) Electrical treeing characteristics in XLPE power cable insulation in frequency range between 20 and 500 Hz. IEEE Trans Dielectr Electr Insul 16:179–188
Tanaka T, Bulinski A, Castellon J, Montanari GC et al (2011) Dielectric properties of XLPE/SiO2 nanocomposites based on CIGRE WG D1.24 cooperative test results. IEEE Trans Dielectr Electr Insul 18(5):1484–1517
Tanaka T (2005) Dielectric nanocomposites with insulating properties. IEEE Trans Dielectr Electr Insul 12:914–928
Li X, Xu M, Zhang K, Xie D, Cao X (2014) Influence of organic intercalants on the morphology and dielectric properties of XLPE/montmorillonite nanocomposite dielectrics. IEEE Trans Dielectr Electr Insul 21(4):1705–1717
Nelson JK, Hu Y (2005) Nanocomposite dielectrics-properties and implications. J Phys D Appl Phys 38:213–222
Tian F, Lei Q, Wang X, Wang Y (2012) Investigation of electrical properties of LDPE/ZnO nanocomposite dielectrics. IEEE Trans Dielectr Electr Insul 19(3):763–769
Wang W, Chen S, Yang K, He D, Yu Y (2012) The relationship between electric tree aging degree and the equivalent time–frequency characteristic of PD pulses in high voltage cable. In: IEEE 2012, pp 18–21
Chen Y, Imai T, Ohki Y, Tanaka T (2010) Tree initiation phenomena in nanostructured epoxy composites. IEEE Trans Dielectr Electr Insul 17(5):1505–1515
Liu H, Liu Y, Li Y, Zhong P, Rui H (2017) Growth and partial discharge characteristics of electrical tree in XLPE under AC–DC composite voltage. IEEE Trans Dielectr Electr Insul 24(4):2282–2290
Alapati S, Thomas MJ (2012) Electrical treeing and the associated PD characteristics in LDPE nanocomposites. IEEE Trans Dielectr Electr Insul 19(2):697–704
Nyamupangedengu C, Cornish DR (2016) Time-evolution phenomena of electrical tree partial discharges in magnesia, silica and alumina epoxy nanocomposites. IEEE Trans Dielectr Electr Insul 23(1):85–94
Lwin K-S, Lim K-J, Park N-J, Park D-H (2008) PD diagnosis on 22.9 kV XLPE underground cable using ultra-wideband sensor. J Electr Eng Technol 3(3):422–429
Kalaivanan C, Chandrasekar S (2019) A study on influence of SiO2 nano particles on the failure of XLPE underground cables due to electrical treeing. J Electr Eng Technol 14(6):2447–2454
Cavallini A, Montanari GC, Puletti F, Contin A (2005) A new methodology for the identification of PD in electrical apparatus: properties and applications. IEEE Trans Dielectr Electr Insul 12(2):203–215
Contin A, Cavallini A, Montanari GC, Pasini G, Puletti F (2002) Digital detection and fuzzy classification of partial discharge signals. IEEE Trans Dielectr Electr Insul 9:335–348
Author (S.C) would like to sincerely thank the Department of Science and Technology (DST), Government of India, New Delhi for funding this research project work under Advanced Manufacturing Technology Scheme of Technology Development and Transfer Division.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
About this article
Cite this article
Purushotham, S., Chandrasekar, S. & Montanari, G.C. Investigation of Electrical Tree Growth of XLPE Nano Composites using Time–Frequency Map and Clustering Analysis of PD Signals. J. Electr. Eng. Technol. (2020). https://doi.org/10.1007/s42835-020-00532-4
- XLPE insulation
- Partial discharges
- Trees (insulation)
- Power cables
- T–F map