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The power frequency voltage divider calibration device and its uncertainty

Author:
Xu, Dongdong  Zhang, Weiwei  Wang, Nan  Wang, Guangtao  Xu, Guangke  


Journal:
ENERGY REPORTS


Issue Date:
2020


Abstract(summary):

The power frequency high voltage divider is widely used to measure the power frequency high voltage and it is an important measuring instrument for high voltage test. Whether it is accurate or not directly affects the insulation monitoring level of power equipment closely related to the safety of power production, and it is of vital importance for power enterprises to ensure the measurement accuracy of power frequency high-voltage divider. The newly implemented JJG496-2016 recommended three measurement methods: difference comparison, equal power bridge method and voltage ratio method. At present, only some literatures have introduced the measurement method using voltage ratio method and the measurement uncertainty evaluation procedure. This paper introduces a calibration device and measuring method of power frequency high voltage divider using the difference comparison method, and gives the uncertainty of the ratio difference and phase difference of power frequency high voltage divider obtained under the standard test environment. (C) 2019 Published by Elsevier Ltd.


Page:
380---384


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