Sponsor(s):NationalCenterfor High Voltage Measurement; Chinese Society For Electrical Engineering
12 issues per year
High Voltage Engineering is supervised by State Grid Corporation of China, sponsored by National Center for High Voltage Measurement and Chinese Society For Electrical Engineering. It is a professional journal comprehensively demonstrating the scientific information in the field of high voltage technology in China and abroad. It aims to provide practical information and technical measures for achieving the practical results of technology. Its scope covers high voltage equipment, transmission lines, system transient, test engineering, power electronics etc. High Voltage Engineering is included in EI, SA, CA, AJ, IC, CSA, JST, Scopus, CSCD. Impact factor is 2.405.
Editor-in-Chief: Guo Jianbo
High Voltage Engineering,2021,No. 12
Air is the most important insulating medium in the power system, but the lack of relevant experimental results after air gap breakdown currently restricts the understanding of the insulation recovery process. In this paper, the schlieren observation technology was used to quantitatively observe the gas density change of the discharge channel after air gap breakdown, to analyze the morphological changes of the discharge channel, and to calculate the recovery degree of gas density in different areas of the discharge channel based on the schlieren images. The test results show that, after the gap breakdown, the shape of the discharge channel changes from bending to straight and then gradually becomes irregular. The gas density recovery rate in different areas of the discharge channel is different, and the gas density in the area near the rod electrode recovers faster than other areas; based on the gas density recovery degree proposed in this paper, the gas density of the discharge channel recovers within 200 ms after the gap breakdown under the experimental condition. The experimental method and results in this article can provide a reference for the research of the discharge channel deionization time in the power system’s reclosing time.