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用于高幅值陡脉冲测量的电容分压器特性研究

来源:电工电气发布时间:2024-10-09 08:09浏览次数:110

用于高幅值陡脉冲测量的电容分压器特性研究

陈诚1,许雯珺2,3,4,唐利建2,傅凯2,楼俊涛2
(1 国网浙江省电力有限公司金华供电公司,浙江 金华 321000;
2 浙江交通技师学院 机电工程学院,浙江 金华 321015;
3 浙江师范大学 工学院,浙江 金华 321004;
4 浙江省城市轨道交通智能运维技术与装备重点实验室,浙江 金华 321005)
 
    摘 要:雷电冲击试验是电力设备电气绝缘材料测试的重要试验项目,具有上升时间快、幅值高的特点,对于高幅值陡脉冲电压的测量是其核心的技术。建立了 400 kV 雷电脉冲的试验平台,对脉冲电容分压器及其冲击响应特性进行研究,分析了电容器介质材料对其频率响应特性的影响。试验结果表明:脉冲电容分压器对雷电脉冲电压具有不同的频率响应,具体表现为测得的雷电电压波形波尾处发生不同程度的畸变,同时不同介质的脉冲电容分压器的刻度因数与理论计算值之间存在较大偏差。从介质理论出发,对试验现象进行了分析,研究结果为脉冲电容分压器的深入研究提供了理论和工程应用基础。
    关键词: 电容分压器;冲击电压测量;不确定度;陡脉冲;介电常数;刻度因数
    中图分类号:TM531.6     文献标识码:A     文章编号:1007-3175(2024)09-0051-07
 
Stduy on Capacitor Divider Characterization for High
Amplitude Steep Pulse Measurements
 
CHEN Cheng1, XU Wen-jun2,3,4, TANG Li-jian2, FU Kai2, LOU Jun-tao2
(1 Jinhua Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd, Jinhua 321000, China;
2 College of Mechanical and Electrical Engineering, Zhejiang Traffic Technician College, Jinhua 321015, China;
3 College of Engineering, Zhejiang Normal University, Jinhua 321004, China;
4 Zhejiang Provincial Key Laboratory of Intelligent Operation and Maintenance Technology and
Equipment for Urban Rail Transit, Jinhua 321005, China)
 
    Abstract: Lightning impulse test is animportant test item of electrical insulating materials test with a fast rise time and high amplitude characteristics.The measurement of high-amplistude steep pulse voltage measurement is its core technology. This paper established test platform of 400 kV lightning impuls, researched on impulse capacitor dividers and its impact response characteristics,and analyzed the influence that capacitive dielectric material had on the frequency response characteristics. The results showed that impulse capacitor divider had different frequency responses to lightning impulse voltage, this phenomenon performed specifically in that the end of measured lightning voltage waveform occurred different degrees of distortion. At the same time, there was a large deviation between the scale factor and the theoretical calculated value of impulse capacitor divider with different dielectric. According the dielectric medium theory, the experimental phenomena were analyzed, and the research results provided the theoretical and engineering application basis for the further study of impulse capacitor divider.
    Key words: capacitor divider; impulse voltage measurement; uncertainty; steep pulse; dielectric constant; scale factor
 
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