硅橡胶浇注式变压器绝缘系统设计与分析  

Design and Analysis of Insulation System of Silicone Rubber Casting Transformer

作　　者：陈晓宇 黄杨珏 孟庆民 陈鹏 金杨 姚瑶 CHEN Xiao-yu;HUAGN Yang-jue;MENG Qing-min;CHEN Peng;JIN Yang;YAO Yao(School of Electric Power,South China University of Technology,Guangzhou 510640,China;Guangdong Key Laboratory of Electric Power Equipment Reliability,Guangzhou 510000,China;Shenyang Transformer Research Institute Co.,Ltd.,Shenyang 110000,China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东电网有限责任公司电力科学研究院,广东广州510000 [3]沈阳变压器研究院有限公司,辽宁沈阳110000

出　　处：《变压器》2022年第5期7-12,共6页Transformer

基　　金：广东电网有限责任公司科技项目(GDKJXM20180311)。

摘　　要：将硅橡胶材料应用于干式配电变压器的绕组绝缘材料,在消除噪声振动、降低绕组局部放电量和降低损耗等方面均有优异的表现。但由于硅橡胶材料的电气性能和机械性能与常用的环氧树脂绕组绝缘材料有较大差异,对于硅橡胶浇注干式变压器的冲击耐受能力需进行严格的考核。本文讨论了该变压器绝缘系统设计以及通过ElecNet建立了该变压器二维轴对称有限元模型,对绝缘系统的绝缘材料、绝缘设计、结构尺寸、距离变化进行可行性分析,还依据所设计的绝缘系统中电场进行仿真计算,校核变压器中绝缘裕度和关键性能是否满足要求,并对研制的硅橡胶浇注式变压器开展型式试验验证该绝缘系统的有效性。The application of silicone rubber materials to the winding insulation materials of dry-type distribution transformers has excellent performance in eliminating noise and vibration,reducing partial discharge of windings,and reducing losses.However,due to the large differences between the electrical and mechanical properties of silicone rubber materials and commonly used epoxy winding insulation materials,the impact tolerance of silicone rubber cast dry-type transformers needs to be strictly assessed.This paper discusses the design of the transformer insulation system and the establishment of a two-dimensional axisymmetric finite element model of the transformer through ElecNet.The feasibility analysis of the insulation material,insulation design,structure size,and distance changes of the insulation system is also based on the designed insulation system.The medium electric field carries on the simulation calculation to check whether the insulation margin and key performance of the transformer meet the requirements,and carries out the type test on the developed silicone rubber cast-in transformer to verify the effectiveness of the insulation system.

关 键 词：干式变压器 硅橡胶 雷电冲击电压 绝缘裕度 

分 类 号：TM402[电气工程—电器]