非线性直流氧化锌电阻片侧面无机绝缘涂层研究  

Inorganic Insulating Coating on the Side of Nonlinear DC Zinc Oxide Varistor

作　　者：万帅 曹伟[1,2,3] 谷山强 刘子皓[1,2,3] 吴煊之 张倩[4] 孔安廷 WAN Shuai;CAO Wei;GU Shanqiang;LIU Zihao;WU Xuanzhi;ZHANG Qian;KONG Anting(State Grid Electric Power Research Institute,Nanjing 211106,China;Wuhan NARI Limited Company,State Grid Electric Power Research Institute,Wuhan 430074,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention,Wuhan 430074,China;College of Sciences,Shanghai University,Shanghai 200444,China)

机构地区：[1]国网电力科学研究院有限公司,南京211106 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]电网雷击风险预防湖北省重点实验室,武汉430074 [4]上海大学理学院,上海200444

出　　处：《电瓷避雷器》2022年第3期159-165,共7页Insulators and Surge Arresters

基　　金：国家电网公司科技项目“±1 100 kV特高压直流输电线路雷电防护关键技术研究及应用”(编号:524625190020)。

摘　　要：针对现有非线性直流氧化锌电阻片的性能优化,笔者开展了电阻片侧面无机绝缘涂层的性能研究,并对比分析了不同涂层配方对电阻片方波通流容量、大电流冲击、老化系数、压比等参数性能的影响。通过对比测试涂覆4种不同无机绝缘涂层的氧化锌电阻片,涂覆最优配方绝缘涂层的氧化锌电阻片N4电位梯度为201 V/mm, 5kA雷电冲击残压比为1.76,非线性系数为24,50kA 4/10μs电流冲击以及300 A 2 ms方波电流冲击的通过率均为100%,老化系数为0.39,表现出良好的综合电学性能。Aiming at the performance optimization of the nonlinear DC zinc oxide varistor, the author carried out the research of the inorganic insulating coating on the side of the resistor. The effect of different coating formulations on the performance of the varistor is compared and analyzed. Parameters including square wave current capacity, large current impact capacity, aging coefficient, and residual voltage ratio are tested comparatively. By analyzing the zinc oxide varistor coated with four different inorganic insulating coatings, the varistor N4 coated with the optimal formula coating shows good comprehensive electrical performance. The potential gradient is 201 V/mm, and the 5 kA lightning impulse residual voltage ratio is 1.76. The non-linear coefficient is 24, the pass rate of 50 kA 4/10 μs current impulse and 300 A 2 ms square wave current impulse are 100%, and the aging coefficient is 0.39.

关 键 词：非线性直流氧化锌电阻片 无机绝缘涂层 电气性能 老化性能 

分 类 号：TM54[电气工程—电器]