Title: Excitation effects of arc grounding fault on PT ferroresonance of distribution networks connected to photovoltaic in high-altitude areas

Authors: Jinpeng Yuan; Jingwen Sun; Zibin Li; Wande Lin; Zile Wang; Jianwu Li

Addresses: Haixi Power Supply Company of State Grid Qinghai Electric Power Company, No. 80 Huanghe Middle Road, Golmud City, Haixi, China ' Haixi Power Supply Company of State Grid Qinghai Electric Power Company, No. 80 Huanghe Middle Road, Golmud City, Haixi, China ' Electric Power Research Institute of State Grid Qinghai Electric Power Company, No. 8 Wusi West Road, Chengxi District, Xining City, Qinghai Province, China ' Electric Power Research Institute of State Grid Qinghai Electric Power Company, No. 8 Wusi West Road, Chengxi District, Xining City, Qinghai Province, China ' Electric Power Research Institute of State Grid Qinghai Electric Power Company, No. 8 Wusi West Road, Chengxi District, Xining City, Qinghai Province, China ' State Grid Qinghai Electric Power Company, No. 89 Shengli Road, Chengxi District, Xining City, Qinghai Province, China

Abstract: Power distribution network systems in high-altitude areas with low air pressure are prone to arc grounding fault, and abundant solar resources lead to the access of numerous distributed new energy sources, which further increases the risk of potential transformer (PT) ferroresonance excited by arc grounding fault. This study designed a device simulating the arcing characteristics in high altitude environment, established a Mayr arc model for simulating arc grounding fault, analysed the fault characteristics of PT ferroresonance overvoltage caused by arc grounding, metallic grounding and accessing to new energy in high altitude areas, and compared the effects of connecting damping resistor at the open delta of PT secondary winding and connecting single-phase PT at the neutral of primary winding to suppress ferroresonance under different conditions, which may provide a reference for suppressing ferroresonance caused by new energy access in high altitude areas.

Keywords: ferroresonance; overvoltage; potential transformer; arc grounding fault.

DOI: 10.1504/IJESMS.2026.150574

International Journal of Engineering Systems Modelling and Simulation, 2026 Vol.17 No.1, pp.9 - 22

Received: 08 Dec 2024
Accepted: 02 Apr 2025
Published online: 17 Dec 2025 *

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