All Outputs (19)

Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Journal Article
Naderiallaf, H., Degano, M., Gerada, C., & Gerada, D. (2024). Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 31(4), 2084-2093. https://doi.org/10.1109/tdei.2024.3355032

This contribution elucidates the impact of the fillet radius, a geometric feature of rectangular insulated wires not commonly considered, on the partial discharge inception voltage (PDIV) in low-voltage machine turn-to-turn winding insulation. Initia... Read More about Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors.

Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations (2024)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2024). Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations. IEEE Access, 12, 176232-176246. https://doi.org/10.1109/ACCESS.2024.3506053

This study investigates the partial discharge inception voltage (PDIV) in turn-to-turn insulation of form-wound windings in inverter-fed motors under nine different air pressures, ranging from 1013 mbar to 10 mbar. The research evaluates three voltag... Read More about Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations.

Modeling Humidity Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors at Different Temperatures (2023)
Journal Article
Naderiallaf, H., Ji, Y., Giangrande, P., & Galea, M. (2024). Modeling Humidity Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors at Different Temperatures. IEEE Transactions on Dielectrics and Electrical Insulation, 31(3), 1573-1582. https://doi.org/10.1109/tdei.2023.3338138

This paper models the partial discharge inception voltage (PDIV) as a function of ambient humidity ( H ) at various temperatures ( Ts ) using Schumann’s streamer inception criterion (SCSIC) for turn-to-turn insulation, which is the most vulnerable pa... Read More about Modeling Humidity Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors at Different Temperatures.

Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors (2023)
Journal Article
Naderiallaf, H., Ji, Y., Giangrande, P., & Galea, M. (2024). Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 31(1), 85-94. https://doi.org/10.1109/TDEI.2023.3324287

This paper endeavours to illuminate the variations of various streamer inception parameters (SIPs) with respect to air pressure based on Schumann’s streamer inception criterion (SCSIC). The results based on measured PDIV values and using electric fie... Read More about Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors.

Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: From Ground Level to Cruising Altitude (2023)
Journal Article
Naderiallaf, H., Ji, Y., Giangrande, P., & Galea, M. (2024). Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: From Ground Level to Cruising Altitude. IEEE Transactions on Dielectrics and Electrical Insulation, 31(2), 1044-1053. https://doi.org/10.1109/TDEI.2023.3313569

Considering the turn-to-turn insulation as the most susceptible part to the failure of the electrical machine’s insulation system in inverter-fed motors, this paper aims to elucidate the effect of temperature ( T ) on the streamer inception parameter... Read More about Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: From Ground Level to Cruising Altitude.

Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing (2023)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2023). Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing. IEEE Transactions on Dielectrics and Electrical Insulation, https://doi.org/10.1109/TDEI.2023.3309780

This study aims to evaluate the impact of the bending radius of edgewise insulated wires on dielectric properties such as partial discharge inception voltage (PDIV), partial discharge extinction voltage (PDEV), dielectric dissipation factor (DDF), an... Read More about Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing.

PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing (2023)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2023). PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing. IEEE Transactions on Dielectrics and Electrical Insulation, 1-10. https://doi.org/10.1109/tdei.2023.3307048

This contribution develops the partial discharge inception voltage (PDIV)-FEM-based model based on Schumann’s streamer inception criterion (SCSIC) with respect to thermal ageing time (TAGT) or the insulation lifetime for the turn-to-turn insulation o... Read More about PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing.

Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors (2023)
Journal Article
Naderiallaf, H., Giangrande, P., & Galea, M. (2023). Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors. IEEE Access, 11, 51047-51063. https://doi.org/10.1109/ACCESS.2023.3279886

The behaviour of partial discharge inception voltage (PDIV), partial discharge extinction voltage (PDEV) and repetitive partial discharge inception voltage (RPDIV) as a function of exposure/poling time under unipolar repetitive square wave excitation... Read More about Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors.

A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity (2022)
Journal Article
Naderiallaf, H., Giangrande, P., & Galea, M. (2022). A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity. IEEE Access, 10, 41186-41200. https://doi.org/10.1109/ACCESS.2022.3167698

This paper aims to evaluate a Type-II insulated wire (i.e., Glass fibre insulated wire) as a function of thermal ageing time based on partial discharges (PD) activity. Partial discharge inception voltage (PDIV), partial discharge extinction voltage (... Read More about A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity.

Effect of Voltage Slew Rate on Partial Discharge Phenomenology During Voltage Transient in HVDC Insulation: The Case of Polymeric Cables (2022)
Journal Article
Naderiallaf, H., Seri, P., & Montanari, G. C. (2022). Effect of Voltage Slew Rate on Partial Discharge Phenomenology During Voltage Transient in HVDC Insulation: The Case of Polymeric Cables. IEEE Transactions on Dielectrics and Electrical Insulation, 29(1), 215-222. https://doi.org/10.1109/TDEI.2022.3146436

In this article, the partial discharge (PD) behavior inside a cavity embedded in a dc cable, upon application of a voltage step from transient till steady-state dc, is analyzed as a function of voltage slew rate. The variation of PD characteristics,... Read More about Effect of Voltage Slew Rate on Partial Discharge Phenomenology During Voltage Transient in HVDC Insulation: The Case of Polymeric Cables.

Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations (2022)
Journal Article
Rytöluoto, I., Niittymäki, M., Seri, P., Naderiallaf, H., Lahti, K., Saarimäki, E., Flyktman, T., & Paajanen, M. (2022). Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations. Journal of Materials Chemistry A, 10(6), 3025-3043. https://doi.org/10.1039/D1TA10336A

Dielectric polymer nanocomposites are considered as one of the most promising insulation material candidates for future capacitive energy storage applications, providing tailorability of charge trapping and transport properties at the nanometric leve... Read More about Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations.

A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus (2021)
Journal Article
Shahsavarian, T., Pan, Y., Zhang, Z., Pan, C., Naderiallaf, H., Guo, J., Li, C., & Cao, Y. (2021). A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus. IEEE Access, 9, 77705-77728. https://doi.org/10.1109/access.2021.3082858

Partial discharge (PD) as one of well-known signatures of defects in the insulation system of high voltage equipment has been studied over eight decades. It is of a great interest to power grid operators and owners to identify and distinguish local w... Read More about A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus.

PP/PP-HI/silica nanocomposites for HVDC cable insulation: Are silica clusters beneficial for space charge accumulation? (2021)
Journal Article
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. (2021). PP/PP-HI/silica nanocomposites for HVDC cable insulation: Are silica clusters beneficial for space charge accumulation?. Polymer Testing, 98, Article 107186. https://doi.org/10.1016/j.polymertesting.2021.107186

New potential High Voltage Direct Current (HVDC) cable insulation materials based on nanocomposites are developed in this study. The nanocomposites are produced by blending of polypropylene (PP), propylene-ethylene copolymer (PP–HI) and a modified fu... Read More about PP/PP-HI/silica nanocomposites for HVDC cable insulation: Are silica clusters beneficial for space charge accumulation?.

Designing a HVDC Insulation System to Endure Electrical and Thermal Stresses Under Operation. Part I: Partial Discharge Magnitude and Repetition Rate During Transients and in DC Steady State (2021)
Journal Article
Naderiallaf, H., Seri, P., & Montanari, G. C. (2021). Designing a HVDC Insulation System to Endure Electrical and Thermal Stresses Under Operation. Part I: Partial Discharge Magnitude and Repetition Rate During Transients and in DC Steady State. IEEE Access, 9, 35730-35739. https://doi.org/10.1109/access.2021.3062440

This paper has the purpose to investigate HVDC insulation design considering real operating conditions, when DC steady-state is affected by frequent voltage transients or load variations that may be present during all life. Electrical field distribut... Read More about Designing a HVDC Insulation System to Endure Electrical and Thermal Stresses Under Operation. Part I: Partial Discharge Magnitude and Repetition Rate During Transients and in DC Steady State.

Dielectric Performance of Silica-Filled Nanocomposites Based on Miscible (PP/PP-HI) and Immiscible (PP/EOC) Polymer Blends (2021)
Journal Article
He, X., Seri, P., Rytoluoto, I., Anyszka, R., Mahtabani, A., Naderiallaf, H., Niittymaki, M., Saarimaki, E., Mazel, C., Perego, G., Lahti, K., Paajanen, M., Dierkes, W., & Blume, A. (2021). Dielectric Performance of Silica-Filled Nanocomposites Based on Miscible (PP/PP-HI) and Immiscible (PP/EOC) Polymer Blends. IEEE Access, 9, 15847-15859. https://doi.org/10.1109/access.2021.3052517

This study compares different polymer-nanofiller blends concerning their suitability for application as insulating thermoplastic composites for High Voltage Direct Current (HVDC) cable application. Two polymer blends, PP/EOC (polypropylene/ethylene-o... Read More about Dielectric Performance of Silica-Filled Nanocomposites Based on Miscible (PP/PP-HI) and Immiscible (PP/EOC) Polymer Blends.

Investigating Conditions for an Unexpected Additional Source of Partial Discharges in DC Cables: Load Power Variations (2020)
Journal Article
Naderiallaf, H., Seri, P., & Montanari, G. C. (2020). Investigating Conditions for an Unexpected Additional Source of Partial Discharges in DC Cables: Load Power Variations. IEEE Transactions on Power Delivery, 36(5), 3082-3090. https://doi.org/10.1109/tpwrd.2020.3032800

This paper has the purpose to investigate the variation of electric field inside a HVDC cable insulation, and consequent potentiality of partial discharge inception in a defect upon load current variation. Simulations carried out by COMSOL Multiphysi... Read More about Investigating Conditions for an Unexpected Additional Source of Partial Discharges in DC Cables: Load Power Variations.

Modelling of supply voltage frequency effect on partial discharge repetition rate and charge amplitude from AC to DC at room temperature (2020)
Journal Article
Seri, P., Naderiallaf, H., & Montanari, G. (2020). Modelling of supply voltage frequency effect on partial discharge repetition rate and charge amplitude from AC to DC at room temperature. IEEE Transactions on Dielectrics and Electrical Insulation, 27(3), 764 - 772. https://doi.org/10.1109/TDEI.2019.008552

This paper has the purpose to derive an analytical model ("continuum" model) able to describe the behavior of partial discharge (PD) repetition rate and amplitude, occurring in a cavity embedded in polymeric insulation, as a function of the frequency... Read More about Modelling of supply voltage frequency effect on partial discharge repetition rate and charge amplitude from AC to DC at room temperature.

A Contribution to Everlasting Electrical Insulation for DC Voltage: PD-Phobic Materials (2020)
Journal Article
Montanari, G. C., Seri, P., & Naderiallaf, H. (2020). A Contribution to Everlasting Electrical Insulation for DC Voltage: PD-Phobic Materials. IEEE Access, 8, 41882-41888. https://doi.org/10.1109/access.2020.2977138

This paper focuses on the design of insulating materials candidate from DC-supply applications, proposing viable solutions that may increase the defect-tolerance of an insulation system and avoid the presence of highly energetic phenomena, specifical... Read More about A Contribution to Everlasting Electrical Insulation for DC Voltage: PD-Phobic Materials.

Surface charge pattern analysis based on the field-dependent charging theory: A review (2020)
Journal Article
Li, Q., Naderiallaf, H., Lei, Z., Wang, Y., Liu, P., Zhang, L., Wang, Z., & Zhang, Z. (2020). Surface charge pattern analysis based on the field-dependent charging theory: A review. IEEE Transactions on Dielectrics and Electrical Insulation, 27(1), 257-269. https://doi.org/10.1109/TDEI.2019.008430

Surface charge pattern analysis on HVDC insulators is a difficult task, which requires a comprehensive understanding of the physical mechanisms of surface charging. This paper provides a review on surface charge patterns and related models published... Read More about Surface charge pattern analysis based on the field-dependent charging theory: A review.