35 kV干式空心并联电抗器匝间绝缘材料特性分析  

Analysis on Characteristics of Interturn Insulation Material of 35 kV Dry⁃type Air⁃core Reactors

作　　者：周天春[1] 彭庆军 姜雄伟[3] ZHOU Tianchun;PENG Qingjun;JIANG Xiongwei(Electric Power Planning&Engineering Institute,Beijing 100120,China;Electric Power Research Institute of Yunnan Power Grid Corporation,Kunming 650106,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]电力规划设计总院,北京100120 [2]云南电网有限责任公司电力科学研究院,昆明650106 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《高压电器》2020年第5期188-195,共8页High Voltage Apparatus

基　　金：中国电机工程学会青年人才托举工程(JLB-2017-288);国家重点研发计划“重大科学仪器设备开发”重点专项高重复频率高压脉冲源研制与产业化项目(2017YFF0104300);中国博士后科学基金资助(2014M552552XB)。

摘　　要：深入开展35 kV干式空心并联电抗器匝间绝缘材料特性分析研究,对35 kV干式空心电抗器制造材料选择、工艺改进和运维方式具有重要意义。为此,文中研究了不同热老化程度和吸湿对电抗器匝间绝缘材料聚酯薄膜介电特性的影响。通过研究发现:不同老化温度(110、130℃)下,干燥的聚酯薄膜相对介电常数、介质损耗正切值和电导率在老化后期(120 d)都呈现增大的趋势。在较高老化温度下,样品介质损耗正切值增加更加明显。不同老化温度下,吸湿对相对介电常数的影响结果不同。在不同老化程度下,吸湿后的样品其低频下介质损耗正切值仍然呈现增加的趋势,但在高频下其值有所减小。The effects of thermal aging degree and moisture absorption on the dielectric properties of the interturn in⁃sulation polyester film were investigated.The results indicated that the relative dielectric constant,the dielectric loss tangent and the electrical conductivity of the dried polyester film increased during the later aging period of 120 days at the aging temperature of 110 and 130℃.The dielectric loss tangent of the sample increased more obviously at higher aging temperature.The effect of moisture absorption on the relative dielectric constant varied at different ag⁃ing temperature.Under different aging degrees,the dielectric loss tangent of the samples after moisture absorption still showed increasing trend at low frequencies,but it decreased at high frequencies.

关 键 词：35 kV干式空心电抗器 聚酯薄膜 相对介电常数 介质损耗 

分 类 号：TM472[电气工程—电器]