植物绝缘油纸匝间绝缘的电气性能研究  

Study on electrical performance of vegetable insulating oil-paper interturn insulation

作　　者：宋浩永 陈于晴 黄青丹 黄慧红 王勇 SONG Haoyong;CHEN Yuqing;HUANG Qingdan;HUANG Huihong;WANG Yong(Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangzhou 510620,China)

机构地区：[1]广东电网有限责任公司广州供电局,广东广州510620

出　　处：《绝缘材料》2024年第5期110-115,共6页Insulating Materials

基　　金：南方电网公司重点科技项目(080037KK52190038)。

摘　　要：本研究搭建了匝间绝缘试验平台,并在雷电冲击电压、操作冲击电压和工频电压下开展了植物绝缘油纸绝缘和矿物绝缘油纸绝缘的耐压试验。结果表明:在工频电压下,植物油纸绝缘的击穿电压高于矿物油纸绝缘;在操作冲击电压下,植物油纸绝缘的击穿电压略高于矿物油纸绝缘;在负极性雷电冲击电压下,植物油纸绝缘的击穿电压略低于矿物油纸绝缘。考虑到不同规格导线匝间绝缘的击穿电压存在差异,为指导植物绝缘油变压器的匝间绝缘设计,基于试验结果,采用有限元法对矿物油纸匝间绝缘和植物油纸匝间绝缘的场强进行仿真计算,结果表明击穿电压下矿物油纸匝间绝缘的最大场强高于植物油纸匝间绝缘。An interturn insulation test platform was constructed,and the voltage-withstand tests were conducted on vegetable insulating oil-paper insulation and mineral insulating oil-paper insulation under lightning impulse voltage,switching impulse voltage,and power frequency voltage.The results show that under power frequency voltage,the breakdown voltage of vegetable oil-paper insulation is higher than that of mineral oil-paper insulation.Under switching impulse voltage,the breakdown voltage of vegetable oil-paper insulation is slightly higher than that of mineral oil-paper insulation.Under negative lightning impulse voltage,the breakdown voltage of vegetable oil-paper insulation is significantly lower than that of mineral oil-paper insulation.Considering the differences in breakdown voltage of interturn insulation with different specification of wires,on the basis of test results,the field strength of mineral oil-paper interturn insulation and vegetable oil-paper interturn insulation were simulated and calculated by finite element method so as to guide the design of interturn insulation for vegetable insulating oil transformer.The simulation results show that the maximum field strength of mineral oil-paper interturn insulation is higher than that of vegetable oil-paper interturn insulation under the breakdown voltage.

关 键 词：植物绝缘油 矿物绝缘油 匝间绝缘 仿真计算 击穿电压 

分 类 号：TM214[一般工业技术—材料科学与工程]