浙江电力2025，Vol.44Issue(5)：128-136,9.DOI:10.19585/j.zjdl.202505013
雷电冲击下的空心电抗器结构故障分析
Structural fault analysis of air-core reactors under lightning impulse
摘要
Abstract
In ultra-high voltage(UHV)converter stations,the encapsulation of air-core reactors may deform under lightning impulse due to electromagnetic forces,which may induce structural faults and jeopardize the safe opera-tion of power system.To address this challenge,an electromagnetic-mechanical stress coupling simulation model is established for air-core reactors.The influence of parameters such as current peak and rise time in lightning current mathematical models on the reactor's electromagnetic distribution and structural deformation is analyzed.Based on the probabilistic characteristics of lightning impulse,a Bayesian network-based method is proposed for fault cause analysis.This method utilizes Bayesian network to compute prior and posterior probabilities,enabling systematic fault diagnosis through forward reasoning and backward inference.The results indicate that the lightning current am-plitude,combined with its rate of rise(RoR),exhibits a strong correlation with structural faults in reactor encapsu-lations,making it a critical factor in such failures.A field case study from an actual converter station corroborates the validity and practical applicability of the proposed simulation model and analytical approach.关键词
空心电抗器/雷电冲击/应力形变/贝叶斯网络/包封Key words
air-core reactor/lightning impulse/stress-induced deformation/Bayesian network/encapsulation引用本文复制引用
宗万里,郭是凯华,丁可,叶可,万志成,陈金鹏,陈锋..雷电冲击下的空心电抗器结构故障分析[J].浙江电力,2025,44(5):128-136,9.基金项目
陕西省秦创原"科学家+工程师"队伍建设项目(2022KXJ-074) （2022KXJ-074）
国网浙江省电力有限公司科技项目(B311MR240002) （B311MR240002）
