The increasing propagation of power electronics technologies and the related operational equipment such as inverter-fed drives and solid-state transformers in electrical grids lead to growing harmonic distortion of the
voltage waveform. Harmonics modify the shape of a voltage waveform but also affect the peak voltage despite constant RMS voltage. Resulting from this, it was previously found that harmonics not only have an influence
on the partial discharge patterns and characteristics but also the lifetime of model insulations. The epoxy-mica main wall insulation of rotating electrical machines is partial discharge-resistant to certain extent. Nonetheless,
severe production faults should be detected by partial discharge measurements as they may lead to accelerated ageing. The purpose of this contribution is to investigate the impact of harmonics on the partial discharge
characteristics of the insulation system of rotating electrical machines in general and especially on a test object with an artificial void fault. An assessment of the partial discharge pattern and apparent charge measurement
is given by analyzing the characteristics to harmonic waveform parameters that incoporate peak alteration and shape modification. It is shown that the voltage shape and gradients play a subordinate role compared to the
voltage peak altering effect of harmonics. The effects are more pronounced with the test object with an artificially introduced fault.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:78261 |
| Date | 02 March 2022 |
| Creators | Linde, Thomas, Backhaus, Karsten, Schlegel, Stephan |
| Publisher | VDE Bezirksverein Dresden e. V. |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/acceptedVersion, doc-type:conferenceObject, info:eu-repo/semantics/conferenceObject, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | info:eu-repo/grantAgreement/Sächsische Aufbaubank/Nachwuchsforschergruppe/100339502//SaxoGRID - Sicherer Betrieb von Verteilnetzen für erneuerbare Energien in Sachsen/SaxoGRID |
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