摘要
本文首先介绍酯类绝缘液再填充矿物绝缘油变压器技术的发展历史与代表性案例,梳理目前国内外对酯类绝缘液再填充变压器的酯类绝缘液性能评估的相关研究进展;结合温度场和电场计算结果分析酯类绝缘液再填充前后变压器温升与绝缘特性的变化规律;给出再填充工艺流程等的技术规范;并进一步讨论酯类绝缘液再填充对矿物绝缘油变压器油纸绝缘寿命与耐过载能力的影响;最后对酯类绝缘液再填充变压器挂网运行状态监测案例进行汇总,对运行维护中溶解气体分析(DGA)的方法进行了讨论。
This paper first introduced the historical development and representative cases of retrofilling mineral insulating oil transformers technology with ester-based insulating liquids,and sorted out the current research progress at home and abroad on performance evaluation of ester-based insulating liquids in retrofilled transformers.Combined with the calculation results of temperature field and electric field,the change laws of transformer temperature rise and insulation characteristics of transformer before and after retrofilling of ester insulating liquid were analyzed.Technical specifications for retrofilling processes were introduced.The effects of refilling ester insulating liquid on the oil-paper insulation life and overload resistance of mineral insulating oil transfomer were further discussed.Finally,the cases of monitoring the grid-connected operation status of transformers filled with ester insulating liquid were summarized,and the methods of dissolved gas analysis(DGA)in operation and maintenance were discussed.
作者
钱艺华
邓婷
蔡玉婷
王青
赵一枫
唐桢馥
QIAN Yihua;DENG Ting;CAI Yuting;WANG Qing;ZHAO Yifeng;TANG Zhenfu(Guangdong Key Laboratory of Electric Power Equipment Reliability,Guangzhou 510080,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi′an Jiaotong University,Xi′an 710049,China)
出处
《绝缘材料》
北大核心
2025年第8期28-41,共14页
Insulating Materials
基金
中国南方电网有限责任公司科技项目(GDKJXM 20231000)。
关键词
酯类绝缘液
再填充
变压器
温升
介电强度
油纸绝缘寿命
ester-based insulating liquids
retrofill
transformer
temperature rise
dielectric strength
oil-paper insulation life
