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Selected Papers from the 2022 IEEE International Conference on High Voltage Engineering (ICHVE 2022)

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F6: High Voltage".

Deadline for manuscript submissions: closed (15 June 2024) | Viewed by 1967

Special Issue Editors


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Guest Editor
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Interests: electrical insulating materials; high voltage devices; insulating liquids

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Guest Editor

Special Issue Information

Dear Colleagues,

The 2022 IEEE International Conference on High Voltage Engineering (ICHVE 2022) was held on 26–29 September 2022 in Chongqing, China. It was organized by Chongqing University (China) and endorsed by the IEEE Dielectrics and Electrical Insulation Society (DEIS). This conference (http://www.ichve2022.org/) has attracted a great deal of attention from international researchers in the field of high-voltage engineering. This forum not only provided an excellent platform to share knowledge and experiences on high voltage engineering, but also provided the opportunity to present the latest achievements in power engineering, including topics such as ultra-high voltage, smart grids, and new insulation materials and their dielectric properties. Now, there is an opportunity to publish your paper in Energies.

Prof. Dr. Feipeng Wang
Prof. Dr. Issouf Fofana
Guest Editors

Manuscript Submission Information

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Keywords

  • electromagnetic fields
  • transients, grounding systems, and electromagnetic compatibility (EMC)
  • sensing, monitoring, and diagnostics
  • high voltage testing and measurement
  • aging, space charge, and maintenance
  • advanced materials and insulation systems
  • high voltage systems and smart technologies
  • high voltage direct current (HVDC) technologies and applications
  • industrial applications of high voltage

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Published Papers (2 papers)

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Research

13 pages, 4866 KiB  
Article
Photoionization Impact on the Lightning Impulse Streamer Discharge of Rapeseed Insulating Oil: An Experimental Study
by Yihua Qian and Qing Wang
Energies 2025, 18(1), 157; https://doi.org/10.3390/en18010157 - 3 Jan 2025
Viewed by 439
Abstract
Photoionization is a significant factor influencing the morphology and propagation characteristics of streamers in insulating oil, yet research on the impact of photoionization on streamer branching is almost nonexistent. In this study, we employed an ultraviolet absorber to regulate the photoionization behavior of [...] Read more.
Photoionization is a significant factor influencing the morphology and propagation characteristics of streamers in insulating oil, yet research on the impact of photoionization on streamer branching is almost nonexistent. In this study, we employed an ultraviolet absorber to regulate the photoionization behavior of streamer discharges in rapeseed insulating oil. A quantitative assessment was conducted on the propagation morphology, length, and temperature distribution of positive and negative streamers. The results indicated that the streamer branches propagated in a dendritic manner. When photoionization was suppressed by the ultraviolet absorber, the streamer tended to generate more radially propagating branches, thereby shortening the axial stop length of the streamer branches by 1~3 mm. In addition, suppressing photoionization caused the maximum temperature to rise by approximately 74~220 K, generating more high-temperature hot spots within the streamer branches and promoting the formation of more radially propagating branches in the streamer. The analysis results demonstrated that suppressing photoionization weakened the axial electric field strength in the head region of the streamer branches, thereby inhibiting the electron avalanche behavior at the head of the streamer and thus reducing the rate of axial propagation of the streamer branches. Full article
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16 pages, 6614 KiB  
Article
Comparison of Aging Effect of Ester Liquids and Mineral Oil in Semi-Uniform Field Geometry under Lightning Impulse Voltage and Standard Compliant AC Voltage Testing
by Sabrina Krügel and Ronald Plath
Energies 2024, 17(19), 4946; https://doi.org/10.3390/en17194946 - 3 Oct 2024
Viewed by 719
Abstract
This study examines and compares the breakdown and aging properties of five insulating liquids. Additionally, the influence of different voltage polarities on these properties was analyzed to investigate the effect of aging on polarity behavior under lightning impulse voltage in a semi-uniform field. [...] Read more.
This study examines and compares the breakdown and aging properties of five insulating liquids. Additionally, the influence of different voltage polarities on these properties was analyzed to investigate the effect of aging on polarity behavior under lightning impulse voltage in a semi-uniform field. The results were compared to standardized AC breakdown tests. After 2330 h and 4350 h of aging, changes were observed in key aging indicators such as water content (both absolute and relative), total acid number, and color across all liquids. Viscosity increased by up to 10% in natural esters. Notably, the rise in water content due to aging was concerning only for mineral oil, exceeding 20%. The impact of aging on breakdown voltage varied depending on the voltage type and polarity. Aging had the least effect under negative lightning impulse voltage, while the synthetic ester MIDEL 7131 exhibited the most significant reduction in breakdown voltage under positive lightning impulse voltage, dropping by over 24%, from more than 560 kV to 428 kV. In contrast, mineral oil showed only a 3% decrease. For the other liquids, the most pronounced reduction in breakdown voltage due to aging occurred under AC voltage, with natural esters showing a 17% decline, synthetic esters 26%, and mineral oil experiencing a 38% reduction. Full article
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