1200 kV SF6绝缘试验电抗器的磁场与温升特性分析  

Analysis of Temperature Rise and Magnetic Field Characteristics for 1200 kV SF6 Insulation Testing Reactors

作　　者：皮本熙[1,2] 聂德鑫 张杰[1,2] 刘思逸 刘卫新[3] 戴明秋 姜宇航 PI Benxi;NIE Dexin;ZHANG Jie;LIU Siyi;LIU Weixin;DAI Mingqiu;JIANG Yuhang(Wuhan Nari Co.,Ltd.,State Grid Electric Power Research Institute,Wuhan 430074,China;NARI Group Co.,Ltd.,Nanjing 211000,China;State Grid Xinjiang Electric Power Research Institute,Urumqi 830000,China;Key Laboratory of Control of Power Transmission and Conversion,Shanghai Jiao Tong University,Shanghai 200030,China)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]南瑞集团有限公司,南京211000 [3]国网新疆电力有限公司电力科学研究院,乌鲁木齐830000 [4]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200030

出　　处：《高压电器》2020年第8期128-133,共6页High Voltage Apparatus

基　　金：国家电网公司科技项目(524625170012)。

摘　　要：特高压试验电抗器的磁场和温升分析与论证是其研制前期的重要基础,研究建立了1200 kV试验电抗器的全尺寸三维仿真模型,采用电—磁—热多场耦合仿真软件Infolytica计算了电抗器内部各部件的磁场分布和温升分布,分析了该电抗器各层绕组的温升特征。研究结果表明,该型式电抗器内部磁场强度最大为1 T;电抗器工作30 min时绕组温升现象最为明显,侧面绝缘温升最高,达78℃,其次为中间层绕组、最外层绕组和环氧屏蔽,绕组结构中最内层绕组温度为65.6℃,后以平均速率2.2℃/级上升,在第7级绕组处达到峰值温度77℃,第7~21级绕组温度分布集中,呈略微下降趋势,第22~26级绕组温度以平均速率2.1℃/级下降并降至63℃,可考虑在第7级绕组处增大绕组层间气道以改善绕组的散热。The magnetic field and temperature rise analyses are bases for developing the high⁃voltage testing reactor.This paper builds the 3⁃D full scale model for the 1200 kV testing reactor.The magnet field and temperature rise distribution are calculated by the multiple electric⁃magnet⁃thermal coupling simulation software Infolytica.The tem⁃perature rise characteristics of the reactor windings are discussed.Results show that,the maximum magnet field is 1 T inside of the reactor.The temperature rise will reach the maximum after working 30 min.The temperature rise for the insulation on side is highest to 78℃,then the intermediate layer windings,windings in the out layer,and epoxy shielding.The temperature rise for the first layer is 65.6℃,and then increases with rate 2.2℃per layer averagely.The peak temperature rise is 77℃and appears in the 7th layer.The temperature rise concentrates and decreases slightly during the 7~21st layer,then in the 22~26th layer goes down with average rate 2.1℃per layer to 63℃.In⁃stalling the air gap at the 7th winding layer can improve the heat dissipation of the windings.

关 键 词：试验电抗器 SF6绝缘 温升 磁场 仿真分析 

分 类 号：TM47[电气工程—电器]