Induced voltage at the closest pole on parallel line due to direct triggered lightning on 10 kV double circuit distribution line. Issue 4 (2nd January 2023)

• Record Type: Journal Article
• Authors: Zhao, Yating; Wang, Jianguo; Cai, Li; Li, Quanxin; Fang, Yuqian; Su, Rui; Wang, Shoupeng; Zhou, Mi
• Is Part Of: IET generation, transmission & distribution. Volume 17:Issue 4(2023)
• Page Start: 790
• Page End: 799
• Publication Date: 2023-01-02
• Subjects: lightning -- lightning protection -- overvoltage; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/gtd2.12706
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract: In 2019, triggered lightning was used to directly strike phase C of a 1.5 km, 10 kV double‐circuit distribution line in Guangzhou, China, with 2 flashes (13 return strokes) recorded. This paper presents the characteristics of induced voltage at the closest pole on the parallel line. The induced voltage is bipolar, which can be divided into 3 stages: negative increase stage, fast and positive transition stage and slowly returning to zero stage. The positive peak value of phase A voltage ranges from 111.4 to 228.9 kV and that of phase C voltage is from 90.1 to 200.9 kV, corresponding to lightning current from −8.9 to −29.9 kA. The positive peak value of the induced voltage is approximately 3 to 10 times the negative peak value. The negative peak, positive peak and positive 10%–10% duration time of induced voltage show a good linear relationship with the peak value of the return stroke current. There was no flashover occurred during the whole process. The result in this paper can provide data support for numerical simulation and line protection analysis. Abstract : Triggered lightning was used to strike a double circuit distribution line. The voltage waveforms on the other circuit closest to the strike point were analyzed.