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dc.contributor.authorRiba Ruiz, Jordi-Roger
dc.contributor.authorMorosini, Andrea
dc.contributor.authorCapelli, Francesca
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica
dc.identifier.citationRiba, J., Morosini, A., Capelli, F. Comparative study of AC and positive and negative DC visual corona for sphere-plane gaps in atmospheric air. "Energies", 8 Octubre 2018, vol. 11, núm. 10, p. 1-18.
dc.description.abstractDue to the expansion of high-voltage direct current (HVDC) power systems, manufacturers of high-voltage (HV) hardware for alternating current (ac) applications are focusing their efforts towards the HVDC market. Because of the historical preponderance of ac power systems, such manufacturers have a strong background in ac corona but they need to acquire more knowledge about direct current (dc) corona. Due to the complex nature of corona, experimental data is required to describe its behavior. This work performs an experimental comparative analysis between the inception of ac corona and positive and negative dc corona. First, the sphere-plane air gap is analyzed from experimental data, and the corona inception voltages for different geometries are measured in a high-voltage laboratory. Next, the surface electric field strength is determined from finite element method simulations, since it provides valuable information about corona inception conditions. The experimental data obtained are fitted to an equation based on Peek’slaw,whichallows determining the equivalence between the visual corona surface electric field strength for ac and dc supply. Finally, additional experimental results performed on substation connectors are presented to further validate the previous results by means of commercial high-voltage hardware. The results presented in this paper could be especially valuable for high-voltage hardware manufacturers, since they allow determining the dc voltage and electric field values at which their ac products can withstand free of corona when operating in dc grids.
dc.format.extent18 p.
dc.publisherMultidisciplinary Digital Publishing Institute (MDPI)
dc.rightsAttribution 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica
dc.subject.lcshElectric currents, Alternating
dc.subject.lcshElectric currents, Direct
dc.subject.lcshCorona (Electricity)
dc.subject.lcshHigh voltages
dc.titleComparative study of AC and positive and negative DC visual corona for sphere-plane gaps in atmospheric air
dc.subject.lemacCorrents continus
dc.subject.lemacCorrents alterns
dc.subject.lemacAlta tensió
dc.contributor.groupUniversitat Politècnica de Catalunya. MCIA - Motion Control and Industrial Applications Research Group
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
upcommons.citation.authorRiba, J., Morosini, A., Capelli, F.

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