外文翻譯---基于labview的電流互感器校驗(yàn)儀(文件)
【正文】 壓。 Np和 Ns分別是主次繞組的匝數(shù)。 比較電路，提及了不同的測(cè)量原理電路，如圖（ 1）所示。電流互感器的測(cè)量誤差和校準(zhǔn)準(zhǔn)確性通常適用于微分測(cè)量方法。 該校驗(yàn)儀表示，采用虛擬儀器技術(shù)，不僅能符合傳統(tǒng)要求的之一，而且還能滿足客戶(hù)要求的多功能，方便等優(yōu)點(diǎn)，并且還具有很高比例性能和成本。 虛擬的電流互感器被廣泛的應(yīng)用于各種各樣的電流測(cè)量，并且它還具有保護(hù)功能，能隔離和擴(kuò)大測(cè)量范圍。這個(gè)虛擬的電流互感器校驗(yàn)儀不僅能夠自動(dòng)的進(jìn)行尺寸計(jì)算，而且還能夠指出錯(cuò)誤的狀態(tài)曲線。 6) For multiple use in one PC. 7) It can record and save, display the calibration data automatically. 基于 LabVIEW的電流互感器校驗(yàn)儀 Xin Ai Hai Bao T. H. Song布魯塞爾大學(xué) 摘要 虛擬儀器（ VI），指的是利用軟件在計(jì)算機(jī)上建立各種各樣的儀器，比如說(shuō) LabVIEW，就象是真的建立在計(jì)算機(jī)上的儀器一樣。 2.) Multi function, VI is designed on PC. It has waveform indictor, parameter controls and so on. At the time we calibrating a TKs accuracy, these functions can indicate many information such as waveform quality and so on。 The above shows that the function of virtual calibrator is greatly expended that of the traditional ones. 7111s kind of calibrator is not only convenient to use, but also makes the performance of the calibrator much better. From the function that shows the waveform, we can find out if there are some harmonics in the current, and confirm the accuracy for the calibrator. IV. EXPERIMENT The virtual calibrator is mainly characterized by the flexibility pared with the traditional ones. Although the front panel has many functions, they can be easily extended by the user. So the virtual calibrator is of important value for the nonstandard TA calibration. In the experiment, the primary current produce by a stepup current transformer and its39。%。 4) Setting the number of sampling of error curve。The switch decides the start and stop of the virtual calibrator. Of course, to change the measuring range, the operator needs to adjust the voltage regulator and change the primary current. This operation is necessary like that of the traditional calibration, but the recording for the error in any range is done by the virtual calibration. This confirms the accuracy of recording and relieves the operator39。 2) Press the start button to start to work, adjusting the voltage regulator and changing the primary current, let the ratio between primary current and the rated current change from 10% to 120%。s error39。s phase diagram, when io is maximum, the value of id is the ratio error。s accuracy should be 2 levels higher than the measured one. The calibrator function lies in forming parison circuits, measuring, and showing the error at all range. The parison circuit, also referred to the difference measuring principle circuit, is showed in Fig. 1. By measuring the voltage on I, and Rd, calculate the corresponding current. Then the calibrator can indicate the error. When a TA has the same turn ratio between the primary and secondary winding, the selfparison circuit could be used and is shown in . In the figures, TA0 and TAX are standard and TA being measured respectively. Np and Ns are primary and secondary winding turns. ip and io, id, i, are primary current secondary standard current, secondary error current, secondary current of TA being measured respectively. Ro and R,R, are secondary winding39。 main characteristics are flexibility, multifunctions, multiple uses for one PC puter, giving high performance, and is less costly. In this paper, the VI technology is applied to the test and measurement of instrument current transformer (TA). By using the LabVIEW, the TA accuracy calibrator was developed. This vi
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