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    Suzhou Electric Appliance Research Institute
    期刊號: CN32-1800/TM| ISSN1007-3175

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    一起高壓并聯(lián)電容器裝置事故分析

    來源:電工電氣發(fā)布時間:2016-12-19 08:19 瀏覽次數(shù):7
    一起高壓并聯(lián)電容器裝置事故分析
     
    陳穎,張磊,錢碧甫,張翔
    (國網(wǎng)溫州供電公司,浙江 溫州 325000)
     
        摘 要:特定頻率的諧波下,并聯(lián)電容器與系統(tǒng)發(fā)生并聯(lián)諧振,放大諧波電流,影響電容器及系統(tǒng)的正常工作。分析了一起由并聯(lián)電容器發(fā)生并聯(lián)諧振引起的電容器組串聯(lián)電抗器燒毀事故,根據(jù)對象變電站實際參數(shù)與事故現(xiàn)場采集數(shù)據(jù),給出系統(tǒng)相應(yīng)運行方式下的諧振區(qū)間,通過仿真計算闡述了電容器投切對5次諧波的放大影響,并針對該變電站的串聯(lián)電抗器參數(shù)設(shè)定提出了改進措施。
        關(guān)鍵詞:并聯(lián)電容器;串聯(lián)電抗器;并聯(lián)諧振;電抗率
        中圖分類號:TM53     文獻標識碼:B     文章編號:1007-3175(2016)12-0040-05
     
    Accident Analysis of a Burnout Failure of High-Pressure Shunt Capacitor
     
    CHEN Ying, ZHANG Lei, QIAN Bi-fu, ZHANG Xiang
    (State Grid Wenzhou Electric Power Supply Company, Wenzhou 325000, China)
     
        Abstract: Under the harmonic waves of specific frequency, the parallel resonance happened between the shunt capacitor and the system, which magnified the harmonic currents and had impacts on the capacitors and the regular work of the system. This paper analyzed a burnout failure of capacitor bank series reactor caused by parallel resonance happened in the shunt capacitors. According to the actual parameters of the object transformer substation and the data collection on site of accident, this paper gave the resonance zones under different operation modes, expounded the amplification impact of capacitor switching on 5-th subharmonics and proposed the improvement measures set for series reactor parameters of this transformer substation.
        Key words: shunt capacitor; series reactor; parallel resonance; reactance rate
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