变压器燃爆故障模拟的金属丝电爆炸引弧实验研究

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中图分类号：TM403.4文献标志码：ADOI：10.7652/xjtuxb202508017 文章编号：0253-987X（2025）08-0177-10

Experimental Investigation of Wire-Explosion Triggered Arcing for Transformer Fire-Explosion Failure Simulation

LI Yuanqi¹，WANG Lil，GE Yining1，WANG Ke2 ，LI Jinzhong³， LIANG Fan4，LIU Xuandongl，LI Gang²，LI Geqi² （1.SchoolofElectricalEnginering，Xi'anJiaotong University，Xian0o49，China;2.ChinaElectricPowerResearchIstitute， Beijing 00192，China；3. State Grid Corporation of China，Beijing 10oo31，China；4. Zhengzhou Power Suppy Company， State Grid Henan Electric Power Company， Zhengzhou 45oo99，China）

Abstract： To address the critical threat posed by arcing faults in transformer on-load tap changers to power transmisson safety and stability，and the unclear mechanisms of how wire-explosion byproducts influence pressure characteristics in conventional transformer fire-explosion tests，this study proposes a comparative research methodology combining wire-explosion experiments with characteristic analysis. An oil-immersed wire-explosion experimental platform is established to investigate the typical development process， discharge characteristics，and pressure features. The findings demonstrate that： the wire-explosion discharge process exhibits four distinct phases-pre explosion，explosion-to-voltage-peak，ionization，and breakdown；system stored energy significantly determines discharge modes and subsequent pressure characteristics， while wire dimensions directly correlate with energy loss during arc initiation， both critically affecting discharge channel conditions and energy deposition processes； these factors collectively govern initial shockwave pressure and propagation patterns. This research provides fundamental insights into oil-immersed wire electrical explosion processes and offers valuable references for optimizing transformer fireexplosion simulation test protocols.

Keywords： on-load tap changer; explosion test， arc fault； metal wire electrical explosion;pressure characteristics

近年来，为实现能源战略转移，我国大力发展远距离、大容量高压直流输电。（剩余14500字）