HIGH VOLTAGE APPARATUS

 

 

Chief Editor: Jia Tao

Sponsored by: China XD Group Corporation

Publication Frequency: Monthly

ISSN: 1001-1609

CN: 61-1127/TM

Address: No. 18, North Section of West Second Ring Road, Xi'an City

Postal distribution code: 52-36

Founded: 1958

 

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Volume 62 期 3，2026 2026年第62卷第3期

  • Research & Analysis

    CHEN Xiaokun, LIN Yi, LYU Chaowei, LIU Jiang, GUAN Xiangyu

    DOI：10.13296/j.1001-1609.hva.2026.03.001
    摘要：Infrared thermography is an important means of temperature rise detection for GIS (gas insulated switchgear). Infrared thermography devices on site mostly use infrared or infrared-visible two-dimensional imaging methods, which are insufficient for characterizing the spatial thermal distribution of GIS. In this paper, based on a monocular infrared camera, an adversarial neural network (GAN) is used as a virtual infrared thermal imaging camera with lateral parallax, and then a 3D reconstruction of the GIS temperature field is achieved through physical and virtual infrared binocular visual stereo matching. The 1017 pairs of original IR binocular dataset containing different angles is collected by performing temperature rise tests of GIS under different currents and using zhang’s calibration method to calibrate the physical and virtual camera positions. The image collected by the monocular infrared camera is used as the left image input, and the pix2pixHD image generation frame is used as the virtual infrared camera to generate the right image. The SGM (semi-global matching) stereo matching algorithm is used to match the original image with the generated image and to obtain the computed parallax map, thus achieving 3D reconstruction by solving the 3D coordinates in accordance with the parallax map. The result shows that the FID (fréchet inception distance) of the image generated by pix2pixhd image conversion framework on the test set can reach 55.136, the perceptual loss can reach 0.079, the structure similarity index measure can reach 0.926 and the peak signal-to-noise ratio can reach 27.387. The virtual binocular camera can reach the accuracy of physical binocular camera, which provides an effective method for achieving economical and efficient 3D temperature field reconstruction of GIS and improving the reliability of temperature inspection results.  
    关键词：adversarial neural network;gas insulated switchgear;binocular vision;3D reconstruction;virtual camera   
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    更新时间：2026-03-11

    LI Xiuguang, LU Zilai, YAO Xiaofei, HAN Siman, ZHOU Xiu, ZHENG Kaixuan, GUAN Chen, ZHENG Jiaming

    DOI：10.13296/j.1001-1609.hva.2026.03.002
    摘要：Phase-controlled fast interruption technology for short-circuit currents can effectively reduce the arcing time during interruption, thereby enhancing the performance of vacuum circuit breaker. The study of the influence of the opening speed on short circuit current short arcing time of double-break fast vacuum circuti breaker can provide theoretical base for phase-controlled short arcing interruption of the double-break fast vacuum circuit breaker. In this paper, two sets of 12 kV rapid vacuum circuit breakers and the driving control system are adopted in the test, the synthetic experimental circuit system for short circuti current arcing interruption of the vacuum circuti breaker is set up to obtain the relationship curve between double break short arcing time and the critical arc extinguishing clearance and the opening speed.The experimental results indicate that both short arcing time of the double-break short circuit current interruption and the critical arx extinguishing clearance show monotonic decrease with the increase of the opening speed.  
    关键词：vacuum circuit breaker;rapid opening;double break;opening speed;short arcing time   
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    更新时间：2026-03-11

    YU Yongxiang, XIAO Hui, TIAN Yihua, QIAN Wei

    DOI：10.13296/j.1001-1609.hva.2026.03.003
    摘要：In case of switching back-to-back capacitor bank by vacuum circuti breaker, the inrush arc during the closing pre-strike process will seriously ablate the contact surface of the vacuum interrupter, and the damaged contact surface will lead to the problem of high re-strike probability during the opening process. During the closing process, the magnetic field of the contact itself will affect the characteristics of the inrush pre-strike arc, which is the key factor to determine the re-strike probability. The purpose of this paper is to study the influence of cup-shaped transverse and longitudinal magnetic field structure on the characteristics of pre-strike arc in the capacitive switching process of vacuum interrupter. In this paper, the vacuum interrupter contacts with cup-shaped transverse magnetic and longitudinal magnetic structures are used for experiments. The contact diameter of the vacuum interrupter is 48 mm and the transparent glass insulation shell is used. There is no shield inside to facilitate the observation of pre-strike arc. In the experiment, a high-speed camera is used to observe and record the characteristics of inrush pre-strike arc. The experimental results show that under the same conditions, the cup-shaped longitudinal magnetic field is more effective than the transverse magnetic field to reduce the ablation of the contact surface by the prestrike inrush arc, thereby improving the capacitive current interruption capability of the vacuum interrupter. This is not only of great significance to solve the problem of re-strike of capacitive interruption of vacuum circuit breaker, but also provides technical guidance and theoretical basis for the development of vacuum circuit breakers to higher voltage levels.  
    关键词：vacuum interrupter;back-to-back capacitor banks;high frequency inrush current;field emission currents;capacitive current switching   
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    LIU Shunkai, MA Ping, XIN Zhaozhao, CHEN Zhibin, LI Jialong, CAO Yangna, HE Bo

    DOI：10.13296/j.1001-1609.hva.2026.03.004
    摘要：Environmentally friendly switchgear using clean air as the insulation medium meets the requirements of green environmental protection concepts and the“dual carbon”target. Dead tank type high-pressure products are more likely to solve both insulation and heat dissipation problems and, however, their high current heating and temperature rise problems are still prominent. In response to the temperature rise problem encountered in the development of 40.5 kV/2500 A high current environmentally friendly switchgear at 1.1 times of the rated current, a three position switch and busbar prototype model are constructed in this paper, the electromagnetic-thermal-flow multi physics coupling simulation method is adopted to study its temperature rise characteristics and the simulation result is verified through testing. The structural optimization of the original prototype model is performed and the temperature rise before and after the structural optimization is simulated and compared. Under natural cooling conditions at 2 750 A, the maximum temperature rise of the original structure is 66.2 K, and that of the new structure is 52.6 K. After optimization, the temperature rise is decreased by 13.6 K, significantly improving the overall design margin of the product. The whole switchgear prototype, including the three position switch, busbar module, and circuit breaker module, successfully passed the temperature rise test at 2750 A under natural cooling conditions.  
    关键词：clean air insulated switch;multi-physics-field coupling;temperature rise characteristics;structural optimization   
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    更新时间：2026-03-11
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