油浸式立体卷铁芯变压器热点温度计算  

Hot Spot Temperature Calculation of Oil--immersed Three-dimensional Core Coil Transformer

作　　者：白鹭[1] 刘永强 李帅 BAI Lu;LIU Yongqiang;LI Shuai(Pingding County Power Supply Company of State Grid Shanxi Electric Power Corporation,Y angquan,Shanxi 045000,China;Lvliang Power Supply Company of State Grid Shanxi Electric Power Corporation,Lvliang,Shanxi 033000,China;Electric Power Research Institute of State Grid Shanxi Electric Power Corporation,Taiyuan,Shanxi 030001,China)

机构地区：[1]国网山西省电力公司平定县供电公司,山西阳泉045000 [2]国网山西省电力公司吕梁供电公司,山西吕梁033000 [3]国网山西省电力公司电力科学研究院,山西太原030001

出　　处：《山西电力》2021年第3期16-19,共4页Shanxi Electric Power

基　　金：国网山西省电力公司科技项目(52053018000v)。

摘　　要：以S13-M.RL-100 kVA/10kV型油浸式立体卷铁芯变压器为研究对象,针对标准中推荐的变压器绕组瞬态热点温度计算经验公式在负荷突变时计算误差较大的情况,基于变压器温升试验结果,使用Levenberg-Marquardt(L-M)算法对经验公式中变压器热特性参数进行寻优,改进了经验公式瞬态热点温度计算方法。使用改进后的经验公式对S13-M·RL-100 kVA/10 kV变压器的多阶段温升试验过程中的热点温度进行计算,计算结果与试验结果最大误差不超过5℃,验证了所提算法的有效性和可靠性。Taking S13-M·RL-100 kVA/10 kV oil-immersed three-dimensional core coil transformer as the research object,this paper tries to deal with the situation that the calculation error of the empirical formula of transformer winding transient hot spot temperature recommended in the standard is large when the load changes suddenly.Based on the transformer temperature rise test results,the Levenberg-Marquardt algorithm is used(L-M)to optimize the thermal characteristic parameters of transformers in empirical formula,and the calculation method of transient hot spot temperature in empirical formula is improved.The improved empirical formula is used to calculate the hot spot temperature in the multi-stage temperature rise test of S13-M·RL-100 kVA/10 kV transformer.The maximum error between the calculation results and the test results is less than 5℃,which verifies the effectiveness and reliability of the proposed method.

关 键 词：油浸式变压器 温升试验 光纤测温 变压器热点 LEVENBERG-MARQUARDT算法 

分 类 号：TM411[电气工程—电器]