多脉冲雷电流下氧化锌压敏电阻损伤机理试验分析  

Experimental Analysis on Damage Mechanism of Zinc Oxide Varistors under Multi-pulse Lightning Current

作　　者：张利华 李涵[2] 赵军 ZHANG Lihua;LI Han;ZHAO Jun(Beijing Lightning Protection Device Test Center of Beijing Meteorological Service,Beijing 100176,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]北京市气象局北京雷电防护装置测试中心,北京市100176 [2]武汉大学电气与自动化学院,武汉市430072

出　　处：《建筑电气》2025年第2期18-23,共6页Building Electricity

摘　　要：依据相关标准确定多脉冲雷电流试验参数,在多脉冲雷电测试平台对氧化锌压敏电阻ZnO阀片开展3个系列的冲击试验。试验结果表明:多脉冲电流幅值、脉冲数量和间隔时间对氧化锌压敏电阻的电气性能、试品温升及热崩溃损伤机理均有显著影响。因而,目前在直击雷防护系统中使用的SPD耐受多脉冲雷电流冲击的能力可能较低,亟需加强SPD多脉冲动作计数与状态监测研究,完善相关防护标准。Parameters of tests under the multi-pulse lightning current are fixed according to relevant standards,and three series of impulse tests on zinc oxide(ZnO)varistor valve plates are carried out on a multi-pulse lightning test platform.The test result shows that the multiple-pulse current amplitude,pulse number and interval significantly impact the electrical properties of the zinc oxide varistor,tested objects'temperature rise and the damage mechanism of thermal breakdowns.Therefore,the SPD currently used in direct lightning strike protection systems may have a low ability to withstand multi-pulse lightning current impulse,and it is urgent to strengthen the study on SPD multi-pulse action counting and condition monitoring and improve the relevant protection standards.

关 键 词：雷击防护 多脉冲电流 冲击过电压 氧化锌压敏电阻 电涌保护器(SPD) 冲击试验 损伤机理 热崩溃 

分 类 号：TU895[建筑科学]