本文選題：Rogowski線圈　切入點(diǎn)：納秒脈沖　出處：《高壓電器》2017年11期 　論文類型：期刊論文

【摘要】：氣體放電包含大量ns級(jí)上升沿m A級(jí)幅值的預(yù)放電電流,預(yù)放電完成后間隙擊穿電流高達(dá)上kA。為了能安全、準(zhǔn)確測量預(yù)放電電流,需研制一種新型Rogowski線圈。文中采用在自積分Rogowski線圈出口電阻兩端并聯(lián)貼片瞬態(tài)電壓抑制二極管(transient voltage suppressor,TVS)的方案,研制了一種帶深度過電流保護(hù)功能的新型Rogowski線圈。通過大量實(shí)驗(yàn),對(duì)自積分電阻和過壓保護(hù)器參數(shù)進(jìn)行了優(yōu)化選擇,結(jié)果表明:滿足電流測量靈敏度時(shí),減小積分電阻值以拓寬線圈頻帶,電阻最優(yōu)值為10~50Ω;過壓保護(hù)器響應(yīng)時(shí)間必須短于待測電流上升時(shí)間;確保線圈保護(hù)峰值電流大于回路最大擊穿電流時(shí),須盡量降低TVS的雜散電容,其值不超過0.5~1 nF。測試表明:新研制的Rogowski線圈既能準(zhǔn)確測量上升沿小于5 ns的mA級(jí)小電流,又能在通過kA級(jí)大電流時(shí)有效保護(hù)后級(jí)設(shè)備。
[Abstract]:Gas discharge consists of a large number of pre-discharge currents of ns rising along Ma magnitude. The gap breakdown current is as high as up to Ka after completion of pre-discharge. In order to be safe, the pre-discharge current can be accurately measured. A new type of Rogowski coil is developed. In this paper, a novel Rogowski coil with depth overcurrent protection is developed by using the scheme of paralleling the transient voltage suppressor-TVs at the two ends of the outlet resistor of the self-integrated Rogowski coil. A large number of experiments have been carried out. The parameters of self-integral resistance and overvoltage protector are optimized. The results show that when the sensitivity of current measurement is satisfied, the integral resistance value is reduced to widen the coil frequency band. The optimum value of resistance is 10 ~ 50 惟, the response time of overvoltage protector must be shorter than the rising time of current to be measured, and the stray capacitance of TVS should be reduced when the peak current of coil protection is larger than the maximum breakdown current of the loop. The test results show that the newly developed Rogowski coil can not only accurately measure the small current of Ma level with rising edge less than 5 ns, but also can effectively protect the rear stage equipment when passing through the Ka grade high current.
【作者單位】： 國網(wǎng)陜西省電力公司電力科學(xué)研究院;中國電建集團(tuán)西北勘測設(shè)計(jì)研究院有限公司;國網(wǎng)浙江省電力公司電力科學(xué)研究院;
【分類號(hào)】：TM55
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本文編號(hào)：1634292