New Insights of High-Voltage and Insulation Technology

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (1 March 2025) | Viewed by 1131

Special Issue Editors


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Guest Editor
Hebei Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China
Interests: key technologies for ultra-high-voltage transmission and transformation; electrical equipment status monitoring and fault diagnosis technology; electromagnetic compatibility and protection of power electronic systems

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Guest Editor
School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
Interests: electric power system and automation; high-voltage and insulation technology

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Guest Editor
China School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Interests: electric power system lightning protection and grounding technology; electric power system overvoltage; external insulation

Special Issue Information

Dear Colleagues,

As global energy demand and renewable energy development continue to escalate and accelerate, the construction of new power systems becomes pivotal in promoting high-quality energy and electricity development under the carbon peaking and neutrality goals. High-voltage technology is integral to ensuring the safe operation of these innovative power systems. With the advent of increasingly complex operational conditions, insulation materials, as critical components within electrical equipment, face unprecedented challenges and opportunities. The reliable performance analysis, defect detection, and condition monitoring of high-voltage transmission and distribution equipment and its insulation components are essential for the safe and reliable operation of power systems.

In this context, this Special Issue invites papers that focus on advanced status monitoring, defect detection, and fault diagnosis technologies for transmission and distribution equipment in new power systems, as well as the degradation mechanisms of insulation materials and their interfaces under complex operational conditions. We welcome both original research articles and comprehensive reviews. The scope of this Special Issue includes but is not limited to the following areas:

  • Status monitoring, defect detection, and fault diagnosis technologies for transmission and distribution equipment;
  • Reliability analysis of high-voltage and high-power electronic devices;
  • Research on the degradation mechanisms and reliability assessment of insulation materials under complex operational conditions;
  • Simulation of interface discharge/degradation processes and the mechanisms of insulation failure in electrical equipment.

We eagerly anticipate your submissions.

Dr. Jianghai Geng
Prof. Dr. Yujian Ding
Dr. Yu Wang
Guest Editors

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Keywords

  • high voltage
  • electrical insulation
  • diagnostics and monitoring
  • insulation aging
  • defect detection
  • performance characterization and analysis

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Published Papers (1 paper)

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Research

14 pages, 2023 KiB  
Article
Streamer-to-Leader Transition Characteristics of Long Air Gap Between Sphere and Plane with Burr Defects at High Altitudes
by Lei Liu, Hao Wang, Guo Lin, Zheng Zhong and Jianghai Geng
Electronics 2024, 13(24), 4899; https://doi.org/10.3390/electronics13244899 (registering DOI) - 12 Dec 2024
Viewed by 699
Abstract
In the valve hall of the converter station of a UHV transmission project at high altitudes, the shielding sphere and the wall/floor form a large-size sphere–plane long air gap. Burr defects on the surface of the shielding sphere can affect its discharge characteristics. [...] Read more.
In the valve hall of the converter station of a UHV transmission project at high altitudes, the shielding sphere and the wall/floor form a large-size sphere–plane long air gap. Burr defects on the surface of the shielding sphere can affect its discharge characteristics. The streamer-to-leader transition is a key process in the discharge of the long air gap. The existing research is limited to the discharge characteristics of small-size electrodes at low altitudes and cannot be directly extended to those of large-size electrodes at high altitudes. Therefore, this paper constructs a discharge test platform with optical–electrical synchronous detection at an altitude of 2200 m. The instantaneous optical power, electric field intensity, high potential current, and other physical parameters during the discharge in the long air gap of a 1.3 m diameter sphere–plane system were collected for both a sphere electrode with burrs and one without burrs. The injection current of the initial streamer was used as the input variable and substituted into Gallimberti’s model to analyse the transformation process of the streamer stem’s vibrational energy into translational energy. A modified model that is more suitable for high altitudes was developed by taking into account convective diffusion and the thermal expansion of the streamer, and the influence of burr defects on the characteristics of the transition from streamer to leader was analysed and compared with the experimental results. Overall, burr defects reduced the duration of the streamer-to-leader transition and facilitated discharge. The analysis results generally agree with the experimental results. The research results are of great significance for the design of the valve hall insulation in converter stations at high altitudes. Full article
(This article belongs to the Special Issue New Insights of High-Voltage and Insulation Technology)
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