Study on the ratio change measurement of 1000 kV HVDC divider based on improved DC voltage summation method
| Autor: | Li Dengyun, Zhou Feng, Changxi Yue, Kaipei Liu, Jicheng Yu, Lei Min |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Dc resistance
voltage division ratio error evaluation electric current measurement Voltage ratio lcsh:QC501-721 national institute of metrology Energy Engineering and Power Technology voltage 1000.0 kv nim germany hvdc divider voltage 100.0 kv ptb Dc voltage improved dc voltage summation method lcsh:Electricity physikalisch-technische bundesanstalt Calibration Electrical and Electronic Engineering auxiliary voltage divider Mathematics business.industry Voltage divider Electrical engineering Process (computing) high-voltage arm voltage ratio change measurement calibration low-voltage arm Metrology voltage dividers voltage measurement lcsh:Electrical engineering. Electronics. Nuclear engineering china business lcsh:TK1-9971 calibration process dc resistance divider Voltage |
| Zdroj: | High Voltage (2019) |
| ISSN: | 2397-7264 |
| Popis: | Determining the voltage ratio change is one of the core issues in the traceability of the DC voltage divider. Basing on the previous research results, this study proposes an improved DC voltage summation method to evaluate the voltage division ratio error of 1000 kV DC resistance divider. The principle of the method is to calibrate the voltage divider with rated voltage 2U by using two auxiliary voltage dividers which are with rated voltage U, wherein the high-voltage (HV) arm and the low-voltage arm of the auxiliary voltage divider can be separated. Research results show that compared with the conventional method, the method can reduce one measurement variable when determining the divider's ratio change, thus simplifying the calibration process. The voltage ratio of 100 kV measured by the method of this study was well-verified by the calibration results from the National Institute of Metrology (NIM, China) and Physikalisch-Technische Bundesanstalt (PTB, Germany). Using the proposed method, the ratio change of DC voltage divider at an applied voltage of 1000 kV was effectively obtained and the uncertainty of 2.5 μV/V was achieved. Research results can provide technical guarantee for the accurate measurement of HVDC magnitude. |
| Databáze: | OpenAIRE |
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