Projektdetaljer
Beskrivelse
Abstract:
Modern power systems are undergoing a major transformation with the integration of renewable energy sources and power electronics technology. As the core components in power conversion and transmission, high-voltage power assets and power electronics converters are now required to achieve maximum power density, facing more severe electrothermal stresses than ever before. These challenges are intensified by multifrequency power-electronics-generated switching impulses with fast rise times and higher frequencies, which impose stringent demands on system performance. Such operating conditions pose serious risks to electrical insulation systems, often the most fragile components within power assets and power electronics converters. The cumulative stress from these harsh conditions can significantly reduce the endurance and lifetime of electrical insulation systems, particularly under multifrequency voltage waveforms. As driven by the actual situations, it is essential to investigate the physical mechanisms and modelling characterization of frequency-dependent dielectric/impedance properties of electrical insulation systems, aiming to enhance insulation system design and support prognostics and health management (PHM) of power assets and power electronics converters under multifrequency electric stresses. Therefore, this Ph.D. project mainly focuses on the underlying dielectric dynamics mechanism and grey-box equivalent circuit modelling investigation, as well as the insulation resilience response to stresses, with a specific focus on high-voltage polymeric insulation systems in multifrequency power electronics applications.
Funding: Self-funded
Modern power systems are undergoing a major transformation with the integration of renewable energy sources and power electronics technology. As the core components in power conversion and transmission, high-voltage power assets and power electronics converters are now required to achieve maximum power density, facing more severe electrothermal stresses than ever before. These challenges are intensified by multifrequency power-electronics-generated switching impulses with fast rise times and higher frequencies, which impose stringent demands on system performance. Such operating conditions pose serious risks to electrical insulation systems, often the most fragile components within power assets and power electronics converters. The cumulative stress from these harsh conditions can significantly reduce the endurance and lifetime of electrical insulation systems, particularly under multifrequency voltage waveforms. As driven by the actual situations, it is essential to investigate the physical mechanisms and modelling characterization of frequency-dependent dielectric/impedance properties of electrical insulation systems, aiming to enhance insulation system design and support prognostics and health management (PHM) of power assets and power electronics converters under multifrequency electric stresses. Therefore, this Ph.D. project mainly focuses on the underlying dielectric dynamics mechanism and grey-box equivalent circuit modelling investigation, as well as the insulation resilience response to stresses, with a specific focus on high-voltage polymeric insulation systems in multifrequency power electronics applications.
Funding: Self-funded
| Status | Afsluttet |
|---|---|
| Effektiv start/slut dato | 01/03/2023 → 28/02/2025 |
Samarbejdspartnere
- University of Bologna
- Chongqing University
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