High Voltage Laboratory

2023

Metrological Qualification of PD Analysers for Insulation Diagnosis of HVDC and HVAC Grids

Garnacho, F., Álvarez, F., Elg, A-P., Mier, C., Lahti, K., Khamlichi, A., Arcones, E., Klüss, J., Rodrigo Mor, A., Pakonen, P., Vidal, J. R., Camuñas, Á., Rovira, J., Vera, C. & Haider, M., Jul 2023, In: Sensors. 23, 14, 6317.

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Molecular Layer Deposition of Polyurea on Silica Nanoparticles and Its Application in Dielectric Nanocomposites

Mahtabani, A., La Zara, D., Niittymäki, M., Anyszka, R., Rytöluoto, I., He, X., Saarimäki, E., Seri, P., Saedy, S., Lahti, K., Paajanen, M., van Ommen, J. R., Dierkes, W. & Blume, A., Jun 2023, In: Journal of Physical Chemistry C. 127, 24, p. 11736-11747 12 p.

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Validation of a Qualification Procedure Applied to the Verification of Partial Discharge Analysers Used for HVDC or HVAC Networks

Vera, C., Garnacho, F., Klüss, J., Mier, C., Álvarez, F., Lahti, K., Khamlichi, A., Elg, A. P., Rodrigo Mor, A., Arcones, E., Camuñas, Á., Pakonen, P., Ortego, J., Ramón Vidal, J., Haider, M., Rovira, J., Simon, P. & Squicciarini, A., Jul 2023, In: Applied Sciences. 13, 14, 8214.

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2022

1-D FEM-Based Approach for Extracting Dimension-Independent Material Properties of Mn-Zn Toroidal Ferrite Cores

Elkhadrawy, R., Panchal, J., Tarhasaari, T., Lahti, K. & Rasilo, P., 2022, In: IEEE Transactions on Magnetics. 58, 9, 7201104.

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Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations

Rytöluoto, I., Niittymäki, M., Seri, P., Naderiallaf, H., Lahti, K., Saarimäki, E., Flyktman, T. & Paajanen, M., 2022, In: Journal of Materials Chemistry A. 10, 6, p. 3025-3043

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2021

Combining good dispersion with tailored charge trapping in nanodielectrics by hybrid functionalization of silica

He, X., Rytöluoto, I., Anyszka, R., Mahtabani, A., Niittymäki, M., Saarimäki, E., Mazel, C., Perego, G., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., Nov 2021, In: E-Polymers. 21, 1, p. 897-909 13 p.

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Deposition of Ureido and Methacrylate Functionalities onto Silica Nanoparticles and Its Effect on the Properties of Polypropylene-Based Nanodielectrics

Mahtabani, A., Niittymäki, M., Anyszka, R., Rytöluoto, I., He, X., Saarimäki, E., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., 2021, In: IEEE Access. 9, p. 130340-130352

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Dielectric performance of silica-filled nanocomposites based on miscible (PP/PP-HI) and immiscible (PP/EOC) polymer blends

He, X., Seri, P., Rytöluoto, I., Anyszka, R., Mahtabani, A., Naderiallaf, H., Niittymäki, M., Saarimaki, E., Mazel, C., Perego, G., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., 2021, In: IEEE Access. 9, p. 15847-15859 13 p.

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PP/PP-HI/silica nanocomposites for HVDC cable insulation: Are silica clusters beneficial for space charge accumulation?

He, X., Rytöluoto, I., Seri, P., Anyszka, R., Mahtabani, A., Naderiallaf, H., Niittymäki, M., Saarimäki, E., Mazel, C., Perego, G., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., Jun 2021, In: Polymer Testing. 98, 14 p., 107186.

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2020

On the Silica Surface Modification and Its Effect on Charge Trapping and Transport in PP-Based Dielectric Nanocomposites

Mahtabani, A., Rytöluoto, I., Anyszka, R., He, X., Saarimäki, E., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., 2020, In: ACS Applied Polymer Materials. 2, 8, p. 3148-3160 13 p.

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Silica surface-modification for tailoring the charge trapping properties of PP/POE based dielectric nanocomposites for HVDC cable application

He, X., Rytöluoto, I., Anyszka, R., Mahtabani, A., Saarimäki, E., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., 2020, In: IEEE Access. 8, p. 87719-87734 16 p.

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4 Citations (Scopus)

40 Downloads (Pure)

2019

Investigation of Nanocomposite Polypropylene for DC Capacitors: A Feasibility Study

Montanari, G. C., Seri, P., Karttunen, M., Paajanen, M., Lahti, K. & Rytöluoto, I., 1 Feb 2019, In: IEEJ transactions on Fundamentals and Materials. 139, 2, p. 105-112

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

Performance Metrics for a Modern BOPP Capacitor Film

Ritamäki, M., Rytöluoto, I. & Lahti, K., 1 Aug 2019, In: IEEE Transactions on Dielectrics and Electrical Insulation. 26, 4, p. 1229-1237 9 p.

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8 Citations (Scopus)

371 Downloads (Pure)

Surface Modification of Fumed Silica by Plasma Polymerization of Acetylene for PP/POE Blends Dielectric Nanocomposites

He, X., Rytöluoto, I., Anyszka, R., Mahtabani, A., Saarimäki, E., Lahti, K., Paajanen, M., Dierkes, W. & Blume, A., 28 Nov 2019, In: Polymers. 11, 12, 1957.

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10 Citations (Scopus)

8 Downloads (Pure)

2018

Effect of temperature and humidity on dielectric properties of thermally sprayed alumina coatings

Niittymäki, M., Lahti, K., Suhonen, T. & Metsäjoki, J., 1 Jun 2018, In: IEEE Transactions on Dielectrics and Electrical Insulation. 25, 3, p. 908-918 11 p.

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5 Citations (Scopus)

346 Downloads (Pure)

2017

Aspects of moisture ingress in polymer housed surge arresters

Da Silva, D. A., Lahti, K., Buontempo, R. C. & Filho, J. P., 6 Apr 2017, In: Electric Power Systems Research. 148, p. 162-170 9 p.

Research output: Contribution to journal › Article › Scientific › peer-review

DC Conduction and Breakdown Behavior of Thermally Sprayed Ceramic Coatings

Niittymäki, M., Lahti, K., Suhonen, T. & Metsäjoki, J., Mar 2017, In: IEEE Transactions on Dielectrics and Electrical Insulation. 24, 1, p. 499-510 12 p.

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5 Citations (Scopus)

31 Downloads (Pure)

Effect of film structure and morphology on the dielectric breakdown characteristics of cast and biaxially oriented polypropylene films

Rytöluoto, I., Gitsas, A., Pasanen, S. & Lahti, K., 1 Sept 2017, In: European Polymer Jounal. 95, p. 606-624

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27 Citations (Scopus)

56 Downloads (Pure)

Large-Area Approach to Evaluate DC Electro-Thermal Ageing Behavior of BOPP Thin Films for Capacitor Insulation Systems

Ritamäki, M., Rytöluoto, I., Lahti, K., Vestberg, T., Pasanen, S. & Flyktman, T., 24 Apr 2017, In: IEEE Transactions on Dielectrics and Electrical Insulation. 24, 2, p. 826-836

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12 Citations (Scopus)

480 Downloads (Pure)

2015

Dielectric Breakdown Strength of Thermally Sprayed Ceramic Coatings: Effects of Different Test Arrangements

Niittymäki, M., Lahti, K., Suhonen, T. & Metsäjoki, J., 2015, In: Journal of Thermal Spray Technology. 24, 3, p. 542-551 10 p.

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11 Citations (Scopus)

206 Downloads (Pure)

Large-area dielectric breakdown performance of polymer films - Part I: Measurement method evaluation and statistical considerations on area-dependence

Rytöluoto, I., Lahti, K., Karttunen, M. & Koponen, M., 1 Apr 2015, In: IEEE Transactions on Dielectrics and Electrical Insulation. 22, 2, p. 689-700 12 p.

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

Large-area dielectric breakdown performance of polymer films - Part II: Interdependence of filler content, processing and breakdown performance in polypropylene-silica nanocomposites

Rytöluoto, I., Lahti, K., Karttunen, M., Koponen, M., Virtanen, S. & Pettersson, M., 1 Aug 2015, In: IEEE Transactions on Dielectrics and Electrical Insulation. 22, 4, p. 2196-2206 11 p.

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24 Citations (Scopus)

2014

Structure and Dielectric Breakdown Strength of Nano Calcium Carbonate/Polypropylene Composites

Virtanen, S., Ranta, H., Ahonen, S., Karttunen, M., Pelto, J., Kannus, K. & Pettersson, M., 2014, In: Journal of Applied Polymer Science. 131, 1, p. 1-8 8 p.

Research output: Contribution to journal › Article › Scientific › peer-review

17 Citations (Scopus)

2013

Lightning-induced remanent magnetization - the Vredefort impact structure, South Africa

Salminen, J., Pesonen, L. J., Lahti, K. & Kannus, K., 2013, In: Geophysical Journal International. 195, 1, p. 117-129 13 p.

Research output: Contribution to journal › Article › Scientific › peer-review

6 Citations (Scopus)

New approach to evaluate area-dependent breakdown characteristics of dielectric polymer films

Rytöluoto, I. & Lahti, K., 2013, In: IEEE Transactions on Dielectrics and Electrical Insulation. 20, 3, p. 937-946 10 p.

Research output: Contribution to journal › Article › Scientific › peer-review

16 Citations (Scopus)

Reliability of directly-molded polymer surge arresters: Degradation by immersion test versus electrical performance

Da Silva, D. A., Da Costa, E. C. M., De Franco, J. L., Antonionni, M., De Jesus, R. C., Abreu, S. R., Lahti, K., Mei, L. H. I. & Pissolato, J., 2013, In: International Journal of Electrical Power and Energy Systems. 53, p. 488-498 11 p.

Research output: Contribution to journal › Article › Scientific › peer-review

16 Citations (Scopus)

2010

Dielectric properties and partial discharge endurance of polypropylene-silica nanocomposite

Takala, M., Ranta, H., Nevalainen, P., Pakonen, P., Pelto, J., Karttunen, M., Virtanen, S., Koivu, V., Pettersson, M., Sonerud, B. & Kannus, K., 2010, In: IEEE Transactions on Dielectrics and Electrical Insulation. 17, 4, p. 1259-1267

Research output: Contribution to journal › Article › Scientific › peer-review

72 Citations (Scopus)

2008

Dielectric properties of nanostructured polypropylene-polyhedral oligomeric silsesquioxane compounds

Takala, M., Karttunen, M., Salovaara, P., Kortet, S., Kannus, K. & Kalliohaka, T., 2008, In: IEEE Transactions on Dielectrics and Electrical Insulation. 15, 1, p. 40-51

Research output: Contribution to journal › Article › Scientific › peer-review

46 Citations (Scopus)

Thermal, mechanical and dielectric properties of nanostructured epoxy-polyhedral oligomeric silsesquioxane composites

Takala, M., Karttunen, M., Pelto, J., Salovaara, P., Munter, T., Honkanen, M., Auletta, T. & Kannus, K., 2008, In: IEEE Transactions on Dielectrics and Electrical Insulation. 15, 5, p. 1224-1235

Research output: Contribution to journal › Article › Scientific › peer-review

37 Citations (Scopus)

2007