电气传动2025，Vol.55Issue(7)：87-96,10.DOI:10.19457/j.1001-2095.dqcd25555
电磁式电压互感器用熔断器频繁熔断原因分析及解决措施
Analysis and Solutions for Frequent Fuse Tripping in Electromagnetic Voltage Transformers
张春丽 1刘红文 2方鹏兴 3柴晨超 4张雯琼5
作者信息
- 1. 云南电力技术有限责任公司,云南 昆明 650217
- 2. 云南电网有限责任公司电力科学研究院,云南 昆明 650217
- 3. 云南电网有限责任公司临沧供电局,云南 临沧 677000
- 4. 云南兆讯科技有限责任公司,云南 昆明 650217
- 5. 昆明昆船智慧机场技术有限公司,云南 昆明 650220
- 折叠
摘要
Abstract
Incidents such as the burning of electromagnetic voltage transformers(PT),damage to primary harmonic suppressors,and fuse tripping occur frequently in low and medium voltage distribution systems due to ferroresonance,severely affecting the safe and stable operation of the system.Therefore,through theoretical analysis and combined with field case studies,it was verified that the saturation current produced by PT saturation due to electromagnetic transient impacts from system single-phase ground faults and circuit breaker operations was the main reason for the frequent fuse tripping.Secondly,the factors influencing the saturation current of PT was analyzed and the capacity of fuses to withstand the PT saturation current was tested.The research indicates that the probability of fuse tripping could be reduced by increasing the PT's DC resistance,choosing cylindrical harmonic suppressors with relatively high knee-point voltages of their volt-ampere characteristics,and increasing the rated current of the fuses.Finally,specific recommendations for the selection of PTs,harmonic suppressors,and fuses were provided,offering reference measures for resolving the issue of frequent fuse tripping in electromagnetic voltage transformers protected by fuses.关键词
电磁式电压互感器/熔断器/频繁熔断Key words
electromagnetic voltage transformers/fuses/frequent tripping分类
信息技术与安全科学引用本文复制引用
张春丽,刘红文,方鹏兴,柴晨超,张雯琼..电磁式电压互感器用熔断器频繁熔断原因分析及解决措施[J].电气传动,2025,55(7):87-96,10.
