Highly accurate calibration system for electronic instrument transformers

• Autorzy: Tong Y. , Ye G. , Guo K. , Li H.
• Języki publikacji: EN

Abstrakty

EN

A high accurate electronic instrument transformer calibration system is introduced in this paper. The system uses the fourth-order convolution window algorithm for the error calculation method. Compared with Fast Fourier Transform, which is recommended by standard IEC-60044-8 (Electronic current transformers), it has higher accuracy. The relative measuring errors caused by asynchronous sampling could be reduced effectively without any special hardware technique adopted. The results show that the ratio error caused by asynchronous sampling can be reduced to 10-4, and the phase error can be reduced to 10-3 degrees when the deviation of frequency is within š0.5 Hz. The present method of measurement processing is achieved by a high-accuracy USB multifunction data acquisition (DAQ) card and virtual measurement devices, with low cost, short exploitation period and high stability.

Słowa kluczowe

EN

electronic instrument transformers; digital output; calibration system; virtual instrument; Fourthorder Convolution Window

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2011
• Tom: Vol. 18, nr 2
• Strony: 315--322
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Tong Y.

autor

Ye G.

autor

Guo K.

autor

Li H.

• State Grid Electronic Power Research Institut

Bibliografia

• [1] IEC60044-7. (2002). Instrument Transformers-part 7. Electrical Voltage Transducers.
• [2] IEC60044-8. (2002). Instrument Transformers-part 8. Electrical Current Transducers.
• [3] Naumovic-Vukovic, D., Skundric, S., Kovacevic, D., Milosavljevic, S. (September 2009) Calibration of high accuracy class standard current transformers. XIX IMEKO World Congress Fundamental and Applied Metrology. Lisbon.
• [4] Bilski, P., Winiecki, W. (2002). Virtual Spectrum Analyzer Based on Data Acquisition Card, IEEE Transaction on instrumentation and measurement, 51(1), 82-87.
• [5] Zhang Jieqiu, Liang Changhong, Chen Yanpu (2004). Power System Harmonic Theory Analysis and Algorithm Based on Convolution Windows. Proceedings of the CSEE, 21(11) , 48-52.
• [6] Nuttall, A.H. (1981). Some window with very good sidelobe behavior. IEEE Trans. On ASSP, 29(1), 84-91.
• [7] Zhao Fusheng, Geng Zhongxing, Ge Yaozhong (2001). FFT algorithm with high accuracy for harmonic analysis in the electric machine. Proceedings of the CSEE, 21(12), 83-87.
• [8] Harris, F.J. (1978). On the use of windows for harmonic analysis with the discrete Fourier transform. Proc. IEEE, 66(1), 51-83.
• [9] Jain, V.K., Collins, W.L., Davis, D.C. (1983). High-accuracy analog measurement via interpolated FFT. IEEE Trans on Instrum. Meas., 32(6), 350-355.
• [10] Teng J.H., Chan S.Y. (2000). A Labview Based Virtual instrument for Power Analyzers. IEEE Power System Technology, (1), 179-184.