何雨微,刘剑,宋佳,徐坤婷,王芳,卢家驹,章玮,姜建,傅正财
HE Yuwei,LIU Jian,SONG Jia,XU Kunting,WANG Fang,LU Jiaju,ZHANG Wei,JIANG Jian,FU Zhengcai

• 1:国网浙江省电力有限公司杭州供电公司
• 2:上海交通大学

摘要(Abstract)：

采用MWMPC(多波形多脉冲电流)来模拟真实雷电流,研究了不同冲击电流幅值、多脉冲时序和时间间隔对试验结果的影响,分析了Ⅰ级SPD(浪涌保护器)阀片在MWMPC下耐受性能的影响因素,并与传统测试电流下的阀片耐受试验结果进行对比。研究结果表明:标准测试电流无法模拟实际多重雷电流作用在SPD上的强劣化效果;SPD阀片在MWMPC下的损坏形式是涂层裂缝、穿孔以及一种特有的裂面上可见穿孔痕迹的炸裂;增加脉冲电流幅值、缩短多脉冲电流的时间间隔或当回击间持续电流出现在后续回击电流之间时,阀片更容易损坏;在携带大能量的冲击电流下,SPD阀片的涂层会影响散热,使阀片的耐受性能不如ZnO裸片好;而当冲击电流波形较陡或者幅值很大时,ZnO裸片容易发生表面闪络,其耐受高陡度冲击电流的能力不如带有涂层的SPD阀片。
The MWMPC(multi-waveform multi-pulse currents) are adopted to simulate lightning currents to study the influence of different current amplitudes, multi-pulse time sequences, and time intervals on test results. The influencing factors of withstanding performance of class-I SPD(surge protection device) valve plate under MWMPC are analyzed and compared with withstand test result of valve plate under traditional test current. The study shows that the standard test currents cannot simulate the strong degradation effects of practical lightning currents with MWMPC; the SPD failure modes under MWMPC include coating crack, puncture, and the MOV cracked and punctured holes appearing on the fractured surface; the increase of the impulse current amplitudes, decrease of the interval time, and when the rectangular current occurs between the two steep currents, the MOVs are more easily to be damaged under MWMPC; under the impulse currents with a large amplitude, the SPD coating would affect the heat dissipation and the withstand capability of SPD is no better than the bared ZnO; in case of steep inrush current waveform or large current amplitude, surface flashover may quite probably occur on the bared ZnO, and the withstand capacity over steep inrush current is inferior to that of the coated SPD valve plate.

关键词(KeyWords)： 浪涌保护器;金属氧化物压敏电阻阀片;多波形多脉冲电流;雷电流模拟
surge protection devices(SPD);metal-oxide varistor(MOV) valve plate;multi-waveform multipulse currents(MWMPC);lightning current simulation

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 何雨微,刘剑,宋佳,徐坤婷,王芳,卢家驹,章玮,姜建,傅正财
HE Yuwei,LIU Jian,SONG Jia,XU Kunting,WANG Fang,LU Jiaju,ZHANG Wei,JIANG Jian,FU Zhengcai

DOI: 10.19585/j.zjdl.202009009

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