机电工程技术2025，Vol.54Issue(23)：165-171,198,8.DOI:10.3969/j.issn.1009-9492.2025.23.028
风力发电机组变压器端子故障诊断与预防措施
Fault Diagnosis and Prevention Measures of Wind Turbine Transformer Terminals
吴坤林 1陈素芳 1罗荣锋 1孙启涛1
作者信息
- 1. 明阳智慧能源集团股份公司,广东 中山 528437
- 折叠
摘要
Abstract
Analysis is carried out on the transformer fault of a certain wind turbine generator unit.On-site inspection of the transformer cabinet,its interior,the auxiliary transformer circuit breaker,and the cooling system ruled out the possibilities of oil leakage and foreign objects.Appearance inspection on winding discharge and ablation locates the fault at terminals 5 and 8 of the W-phase high-voltage winding.The qualified test results of the U-phase and V-phase windings further verify the W-phase winding fault.Through the single-phase transformation ratio,DC resistance test and data analysis,it is determined that the large current generated by the inter-phase short circuit led to the action of the arc protection.After disassembling the winding,it is found that the short circuiting piece of terminals 5 and 8 of the W-phase is a round-cornered copper busbar,resulting in insufficient contact area and increased resistance.At the same time,the bolts might not have been tightened,causing overheating.The high temperature melts the welding point of terminal 5.And the potential difference causes an arc short-circuit to occur,which intensifies the melting of the epoxy resin and ultimately leads to equipment damage.Preventive measures are proposed such as standardizing the installation and tightening of short-circuiting pieces,optimizing the selection of accessories and quality control,and strengthening the operation and maintenance monitoring throughout the life cycle,which can provide experience for subsequent equipment maintenance and fault prevention.关键词
变压器故障/高压绕组/短路/弧光故障Key words
transformer failure/high-voltage winding/short circuit/arcing fault分类
信息技术与安全科学引用本文复制引用
吴坤林,陈素芳,罗荣锋,孙启涛..风力发电机组变压器端子故障诊断与预防措施[J].机电工程技术,2025,54(23):165-171,198,8.
