Partial discharges in insulation systems subjected to multilevel converters

Florkowski, Marek; Błaszczyk, Paweł; Klimczak, Pawel

doi:10.1109/ipmhvc.2016.8012909

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…These have led to higher power density, higher efficiency, and multi-mission capabilities [104,106]. Advanced PEC topologies and WBG power semiconductors including silicon carbide (SiC) and gallium nitride (GaN) devices, and power electronics building blocks (PEBBs) [107][108][109] enabled flexible and efficient shipboard medium-voltage direct current (MVDC) power distribution system that integrates multiple energy sources and loads.…”

Section: Insulating Materials In More-electric Shipsmentioning

confidence: 99%

“…In some cases, additional copper metallisation layers have been placed into power substrates as equipotential rings for electric field grading [115]. When it comes to dielectrics research on power converters, PD characteristics in multilevel converters and fibre optic sensor array have been implemented to monitor PD [107][108][109]. In the case of dielectrics for cables and cable accessories, dielectric ageing behaviour under repetitive voltage stresses and polarity inversion on DC cables have been reported [116].…”

Section: Insulating Materials In More-electric Shipsmentioning

confidence: 99%

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Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Yang

et al. 2022

High Voltage

116

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The 2050 carbon‐neutral vision spawns a novel energy structure revolution, and the construction of the future energy structure is based on equipment innovation. Insulating material, as the core of electrical power equipment and electrified transportation asset, faces unprecedented challenges and opportunities. The goal of carbon neutral and the urgent need for innovation in electric power equipment and electrification assets are first discussed. The engineering challenges constrained by the insulation system in future electric power equipment/devices and electrified transportation assets are investigated. Insulating materials, including intelligent insulating material, high thermal conductivity insulating material, high energy storage density insulating material, extreme environment resistant insulating material, and environmental‐friendly insulating material, are categorised with their scientific issues, opportunities and challenges under the goal of carbon neutrality being discussed. In the context of carbon neutrality, not only improves the understanding of the insulation problems from a macro level, that is, electrical power equipment and electrified transportation asset, but also offers opportunities, remaining issues and challenges from the insulating material level. It is hoped that this paper envisions the challenges regarding design and reliability of insulations in electrical equipment and electric vehicles in the context of policies towards carbon neutrality rules. The authors also hope that this paper can be helpful in future development and research of novel insulating materials, which promote the realisation of the carbon‐neutral vision.

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Section: Insulating Materials In More-electric Shipsmentioning

confidence: 99%

Section: Insulating Materials In More-electric Shipsmentioning

confidence: 99%

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Yang

et al. 2022

High Voltage

116

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“…The increasing number of inverters and power electronic converters in mediumvoltage (MV) grids can lead to the distortion of voltage waveforms [1][2][3]. The consequences of the voltage distortion may include additional dielectric heating [4,5] and altered partial discharge patterns or parameters [6,7]. As a result, degradation and ageing of insulation are stronger when medium-frequency components of the voltage are present [8,9].…”

Section: Introductionmentioning

confidence: 99%

Implications of Nonlinear Material Parameters on the Dielectric Loss under Harmonic Distorted Voltages

et al. 2021

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The increasing number of power electronic devices in electrical grids may lead to harmonic distorted voltages, which are considered to be possible causes of component failures. In this study, the dielectric losses of epoxy polymer and functionally filled silicone rubber (f-SiR) samples are investigated under harmonic distorted voltages in terms of their dielectric losses and the consequent heat source density within the material. The results suggest that the epoxy polymer samples behave linearly to the electric field strength and therefore allow good predictability of the dielectric losses. The investigated f-SiR samples exhibit a nonlinear behaviour when an electric field threshold is exceeded. The subsequent direct loss measurements under harmonic distorted voltage reveal a sharp rise of the dielectric loss with increasing electrical field strength. This leads to a higher risk of excessive heat in the material when harmonics are present. In conclusion, the investigation highlights the difficulties of estimating dielectric losses in nonlinear dielectric materials when distorted voltages are present.

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Understanding the Impact of Wide Bandgap Inverter Topology on Medium-voltage Insulation Reflected-wave Stress Using Impedance Characterization

Mirza

Chen

Bazzi

2021

2021 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Partial discharges in insulation systems subjected to multilevel converters

Cited by 8 publications

References 7 publications

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Implications of Nonlinear Material Parameters on the Dielectric Loss under Harmonic Distorted Voltages

Understanding the Impact of Wide Bandgap Inverter Topology on Medium-voltage Insulation Reflected-wave Stress Using Impedance Characterization

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