DC corona characteristics derived from corona cage tests and simulations

Aytug Font*, Yusuf Tugra Solak, Suat Ilhan, Aydogan Ozdemir, Hasbi Ismailoglu, Fermin Espino Cortes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


This study presents experimental and simulation studies on DC corona characteristics to investigate the behavior of high voltage direct current transmission (HVDC) lines. Experimental studies are performed using an indoor corona cage and various conductor configurations, which are the scaled models of the prospective HVDC line in Turkey. Following the preliminary tests with single line models of aluminum rods and stranded conductors, DC corona inception voltages (CIVs) of prospective bundled conductor configurations are measured by using a daylight UV corona camera and a high-sensitive micro ammeter. Measurements include three different sub-conductor spacing both for the positive and for the negative DC voltages. Corona currents are measured for the voltages above the CIV levels. Experimental studies are varied by complementary simulations using a FEM based software, COMSOL Multyphysics. Following the development of 3D models of the corona cage and the prospective conductor configurations, electric field distribution along the conductor surfaces are determined. CIV measurements and simulation results are used to compute the corona inception electric field strengths of the aforementioned configurations. Radio interference voltages and audible noise levels of the configurations are finally calculated at a constant test voltage using the empirical formulations and the field simulation results. The results are discussed at the end to guide the design of intended HVDC line in Turkey.

Original languageEnglish
Article number8924118
Pages (from-to)1867-1875
Number of pages9
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number6
Publication statusPublished - Dec 2019

Bibliographical note

Publisher Copyright:
© 1994-2012 IEEE.


This research is funded as a part of “215E262 Corona discharge characterization and electromagnetic effects of HVDC transmission lines” project under the framework of the “Bilateral Research and Technology Cooperation Turkey-Mexico” organized by “The Scientific and Technological Research Council of Turkey TUBITAK” and “The National Council of Science and Technology-CONACYT”. The authors also would like to thank to the ITU Fuat Kulunk High Voltage Laboratory for the help of experiments.

FundersFunder number
Bilateral Research and Technology Cooperation Turkey-Mexico
Scientific and Technological Research Council of Turkey TUBITAK
National Science Council


    • acoustic noise
    • corona cage
    • corona characteristics
    • corona inception voltage
    • DC corona
    • radio interference level


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