| 1. |
- Bergman, Anders, et al.
(författare)
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Intercomparison of AC peak voltage measurement
- 1999
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Ingår i: IEE Conference Publication. - : IEE. - 0852967195 ; , s. 1.9.S1-1.12.S1
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Konferensbidrag (refereegranskat)abstract
- An intercomparison on the measurement of high voltage peak value has been carried out between the National Metrology Institutes of Sweden and Germany in 1995 and between Finland and Sweden in 1996. The results show a very satisfactory agreement between the participants. It seems that part of the discrepancies found may be due to the loose definition of peak voltage in IEC 60060-1.
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| 2. |
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| 3. |
- Schon, K., et al.
(författare)
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Intercomparison on PD calibrators and PD instruments
- 1999
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Ingår i: IEE Conference Publication. - : Institute of Electrical and Electronics Engineers (IEEE). - 0852967195 ; , s. 1.5.S1-1.8.S1
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Konferensbidrag (refereegranskat)abstract
- Within the framework of a European project, two partial discharge calibrators were circulated to thirteen laboratories for an intercomparison of impulse charge measurements in the range between 1 pC and 500 pC. The deviations of the charge values q reported by the laboratories were, with a very few exceptions, within ±(0.1 pC+0.03·q). Furthermore, the characteristics of several partial discharge measuring instruments were investigated. The indication of some of the instruments showed deviations of more than ten percent from the correct values.
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| 4. |
- Tang, Hong, et al.
(författare)
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Uncertainty calculation for an impulse voltage divider characterized by step response
- 1999
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Ingår i: IEE Conference Publication. - : IEE. - 0852967195 ; , s. 1.62.S21-1.65.S21
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Konferensbidrag (refereegranskat)abstract
- This paper describes a numerical method, by using FFT and IFFT, for computation of an output response impulse waveform of a high voltage divider that is characterized by a step response. Comparing with convolution integration, the method can be easily implemented and used for evaluation of a high voltage divider. By comparison of the difference between the input forcing impulse and output response impulse, an uncertainty bound on the high voltage divider can thereby be estimated. It is suggested that the error caused by the high voltage divider can be regarded as an offset error that must be linearly added to the expanded uncertainty.
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