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用于高幅值陡脈沖測(cè)量的電容分壓器特性研究

來源:電工電氣發(fā)布時(shí)間:2024-10-09 08:09 瀏覽次數(shù):10

用于高幅值陡脈沖測(cè)量的電容分壓器特性研究

陳誠1,許雯珺2,3,4,唐利建2,傅凱2,樓俊濤2
(1 國網(wǎng)浙江省電力有限公司金華供電公司,浙江 金華 321000;
2 浙江交通技師學(xué)院 機(jī)電工程學(xué)院,浙江 金華 321015;
3 浙江師范大學(xué) 工學(xué)院,浙江 金華 321004;
4 浙江省城市軌道交通智能運(yùn)維技術(shù)與裝備重點(diǎn)實(shí)驗(yàn)室,浙江 金華 321005)
 
    摘 要:雷電沖擊試驗(yàn)是電力設(shè)備電氣絕緣材料測(cè)試的重要試驗(yàn)項(xiàng)目,具有上升時(shí)間快、幅值高的特點(diǎn),對(duì)于高幅值陡脈沖電壓的測(cè)量是其核心的技術(shù)。建立了 400 kV 雷電脈沖的試驗(yàn)平臺(tái),對(duì)脈沖電容分壓器及其沖擊響應(yīng)特性進(jìn)行研究,分析了電容器介質(zhì)材料對(duì)其頻率響應(yīng)特性的影響。試驗(yàn)結(jié)果表明:脈沖電容分壓器對(duì)雷電脈沖電壓具有不同的頻率響應(yīng),具體表現(xiàn)為測(cè)得的雷電電壓波形波尾處發(fā)生不同程度的畸變,同時(shí)不同介質(zhì)的脈沖電容分壓器的刻度因數(shù)與理論計(jì)算值之間存在較大偏差。從介質(zhì)理論出發(fā),對(duì)試驗(yàn)現(xiàn)象進(jìn)行了分析,研究結(jié)果為脈沖電容分壓器的深入研究提供了理論和工程應(yīng)用基礎(chǔ)。
    關(guān)鍵詞: 電容分壓器;沖擊電壓測(cè)量;不確定度;陡脈沖;介電常數(shù);刻度因數(shù)
    中圖分類號(hào):TM531.6     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):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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