油浸式电力变压器过载能力评估算法及工程应用研究  

Research on Overload Capacity Evaluation Algorithm and Engineering Application of Oil-Immersed Power Transformer

作　　者：杨喻清 刘君 付胜军 徐舒蓉 夏龙浩 YANG Yuqin;LIU Jun;FU Shengjun;XU Shurong;XIA Longhao(Guizhou Chuangxing Electric Power Research Institute Co.,Ltd.,Guiyang 550081,Guizhou,China;Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550001,Guizhou,China)

机构地区：[1]贵州创星电力科学研究院有限责任公司,贵州贵阳550081 [2]贵州电网有限责任公司电力科学研究院,贵州贵阳550001

出　　处：《电力大数据》2024年第2期54-61,共8页Power Systems and Big Data

基　　金：贵州电网公司重点资助项目(066600GS62200006)。

摘　　要：油浸式电力变压器的过载能力评估对于确保其安全可靠运行至关重要。目前缺乏一种简单而有效的评估方法,本文通过分析影响油浸式电力变压器过载能力的关键因素,结合变压器的设计原理和片式散热片油箱等效散热面积的概念,首次提出了一种基于油平均温升和顶层油温度的工程评估方法。所提方法考虑了变压器的热特性、冷却系统性能、负载电流、环境温度等因素对变压器温升的影响。该工程评估方法不仅简化了计算过程,还提高了评估结果的准确性。为了验证所提出方法的有效性,利用在运电力变压器实际运行数据进行了工程计算验证。通过与实际测量值进行比较,证实了该方法能够准确地评估油浸式电力变压器的过载能力。The assessment of the overload capacity of oil-immersed power transformers is vital for ensuring their safe and reliable operation,as well as maintaining the stability of the entire power system.Despite the absence of a simple and effective method for this assessment,this study introduces an engineering evaluation approach based on average oil temperature rise and top oil temperature.By analyzing key factors that affect the overload capacity of oil-immersed power transformers,and integrating transformer design principles with the concept of equivalent heat dissipation area of plate-type radiator tanks,the proposed method accounts for the thermal characteristics of the transformer,cooling system performance,load current,and ambient temperature's impact on temperature rise.This simplified calculation process enhances the accuracy of the assessment results.The method's validity was confirmed through comparison with actual operational data from in-service power transformers,demonstrating its capability to accurately assess overload capacity.

关 键 词：油浸式电力变压器 过载能力 绕组热点温度 顶层油温升 评估算法 

分 类 号：TM411[电气工程—电器]