大容量高阻抗自耦变压器绕组热点温升的计算与验证  

Calculation and Verification of Hot Spot Temperature Rise in Large Capacity and High Impedance Autotransformer Winding

作　　者：翟常冬 刘贺 柴孟东 林波 徐莲环 刘刚[2] ZHAI Changdong;LIU He;CHAI Mengdong;LIN Bo;XU Lianhuan;LIU Gang(Shandong Electric Power Equipment Co.,Ltd,Jinan 250022,China;North China Electric Power University,Baoding 071003,China)

机构地区：[1]山东电力设备有限公司,山东济南250022 [2]华北电力大学,河北保定071003

出　　处：《变压器》2024年第11期29-35,共7页Transformer

摘　　要：在大容量超特高压等级变压器不断涌现的同时,变压器的磁-热问题越来越突出,尤其是变压器内部绕组一旦过热会造成内部绝缘件加速老化进而影响变压器运行寿命。本文作者重点研究大容量高阻抗自耦变压器绕组热点温升,基于实际工程数据和经验公式计算出单位热源,进而计算出油面及绕组温升数值;在变压器满负荷运行且ONAF冷却方式下,利用TranCalc软件仿真出各绕组线饼的温升分布图,整理出绕组温升的变化规律和热点温升对应的线饼位置。根据仿真验证结果来布置光纤探头位置,将绕组平均温升及热点温升的理论计算值与光纤实测值进行对比分析,验证了仿真分析结果对大容量自耦变压器温升试验有一定的工程指导作用。As large capacity ultra-high voltage transformers continue to emerge,the magnetic thermal problems of transformers are becoming increasingly prominent,especially when the internal windings of transformers overheat,which can accelerate the aging of internal insulation components and affect the operation life of transformers.This article focuses on studying the hot spot temperature rise of large capacity and high impedance autotransformers.Based on actual engineering data and empirical formulas,the unit heat source is calculated,and then the oil level and winding temperature rise values are calculated;Under the full load operation of the transformer and ONAF cooling mode,the temperature rise distribution map of each winding coil was simulated using TranCalc software,and the variation pattern of winding temperature rise and the corresponding coil positions for hot spot temperature rise were organized.Based on the simulation verification results,the position of the fiber optic probe was arranged,and the theoretical calculated values of the average temperature rise of the winding and the hot spot temperature rise were compared and analyzed with the measured values of the fiber optic.It was verified that the simulation analysis results have certain engineering guidance for the temperature rise test of large capacity autotransformers.

关 键 词：自耦变压器 热点温升 光纤测温 

分 类 号：TM401.1[电气工程—电器]