基于改进型数字比较法的15～30Hz低频互感器误差校验技术研究

doi:10.3969/j.issn.1000-1158.2024.11.03

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Abstract To presents a comprehensive study on error calibration technology for low frequency instrument transformers test set, aiming to achieve high accuracy measurements. Firstly, the low frequency error linearity of the A/D channel in the data acquisition board is analyzed and tested. To address the low frequency error in the sampling data points, a dynamic compensation method is proposed. Additionally, the channel gain error is eliminated using the sampling sequence reconstruction method. An optimal adaptation ratio between the sampling frequency and signal frequency is designed, along with an optimization algorithm for low-frequency signal data processing, significantly improving the measurement accuracy of low-frequency instrument transformers test set. The test results demonstrate a remarkable improve in measurement uncertainties, with ratio difference and phase difference reduced to 10×10^-6(10μrad) for different input ratios and frequencies.

Key words： electrical metrology;low frequency transmission low frequency transformer measurement uncertainties precision measurement digital comparison method sampling sequence reconstruction

Received: 15 January 2024 Published: 29 November 2024

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TB971

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	XIONG Bo
	LIU Hao
	ZHOU Feng
	LI He
	HUANG Tianchao

Cite this article:

XIONG Bo,LIU Hao,ZHOU Feng, et al. Error Measurement Method of 15～30Hz Low Frequency Transformer Based on Improved Digital Comparison Method[J]. Acta Metrologica Sinica, 2024, 45(11): 1601-1606.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.11.03 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I11/1601

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