Development method of a new broadband high precision voltage divider and comparative analysis of measurement accuracy

Ying Zhao; Hao Chen; Tian Tang; Zhong Li Xu; Guang Dong Hou; Ke Song

doi:10.1117/12.2680677

31 May 2023 Development method of a new broadband high precision voltage divider and comparative analysis of measurement accuracy

Ying Zhao, Hao Chen, Tian Tang, Zhong Li Xu, Guang Dong Hou, Ke Song

Author Affiliations +

Proceedings Volume 12704, Eighth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2023); 127040N (2023) https://doi.org/10.1117/12.2680677
Event: 8th International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 2023), 2023, Hangzhou, China

Abstract

The measurement and control of harmonics in extra high voltage direct current (EHV DC) transmission lines is an important guarantee for the safe operation of the EHV DC transmission system. According to the operation it is concluded that when the grid frequency fluctuates, the frequency of AC harmonics will also fluctuate. In the face of frequency fluctuations, the measurement results obtained from the raw data have a large error and have exceeded the design requirements. In order to explore the proper measurement method, further research on voltage harmonics in AC-DC networks under wide band is needed. The new wide-band high-precision voltage divider is the main equipment for measurement and control protection in extra-high voltage DC transmission lines. In this paper, the new wide-band high-precision voltage divider is described from several aspects, such as development method, stray capacitance additional error solution method, experimental test, and experimental result analysis. The experimental results show that the new wide-band high-precision voltage divider can accurately measure the harmonics in the AC-DC transmission network and is verified by Fourier analysis, and the measurement accuracy can meet the accuracy requirements of less than 0.2% at 50Hz and less than 1% from 50-3000Hz.

Citation Download Citation

Ying Zhao, Hao Chen, Tian Tang, Zhong Li Xu, Guang Dong Hou, and Ke Song "Development method of a new broadband high precision voltage divider and comparative analysis of measurement accuracy", Proc. SPIE 12704, Eighth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2023), 127040N (31 May 2023); https://doi.org/10.1117/12.2680677

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KEYWORDS

Capacitance

Resistance

Capacitors

Mathematical modeling

Error analysis

Transformers

Design and modelling

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