Voltage dependence measurement of a 110 kV LVE-TSVT

Shao, Haiming; Lin, Feipeng; Liang, Bo; Zhang, Huanghui; Zhao, Wei; Wang, Jiafu; Li, Chuansheng

doi:10.1109/cpem.2016.7540802

Cited by 2 publications

(1 citation statement)

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“…In order to 3 kV LVE-TSVT T 0 , a new 35 kV fully-insulated LVE-TSVT T 23 was developed for the series summation method, by connecting in series with the 35 kV semi-insulated LVE-TSVT T 1 . It should be declared that this paper, in sections IV.A, reuses some content from thesis [11] with permission.…”

Section: The Measurement and Verification Of The Additional Errormentioning

confidence: 99%

The Research on Additional Errors of Voltage Transformer Connected in Series

2020

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The series summation method is an important method in the calibration of the voltage coefficient (VC) of the standard voltage transformers (VTs), in which the key step is connecting a fullyinsulated VT and a semi-insulated VT in series, and comparing them with the third VT under test. Caused by the imperfect electrical shielding of the serially-wound VTs, additional errors are introduced in the calibration. By analyzing the cause of the additional errors in the serial connection of the VTs, two methods were designed in this paper to measure the additional errors. The proposed methods were harnessed to measure the additional errors for a serial connection of a 35 kV fully-insulated two-stage voltage transformer (TSVT) and a 35 kV semi-insulated TSVT. The results show that the two methods give a consistency of better than 1.0 × 10 −6 in ratio error and 2.0 µrad in phase displacement, respectively. The accurate measurement of the series additional errors and the correction of them significantly improve the accuracy of the VC measurement of a 110/ √ 3 kV TSVT based on the series summation method. Furthermore, the VC measurement result is verified by the consistency of the series summation method with the series additional errors corrected and the high-voltage standard capacitor method. INDEX TERMS Error analysis, high-voltage techniques, series summation method, standard voltage transformer, the serial connection of the transformers, voltage coefficient.

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Section: The Measurement and Verification Of The Additional Errormentioning

confidence: 99%