Influencing factors and uncertainty analysis for Kerr electro-optic effect based electric field measurements in transformer oil under impulse voltage

IF 3.4 3区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Science and Technology Pub Date : 2024-01-03 DOI:10.1088/1361-6501/ad1a68

C. Gao, Xiaolin Zhao, Shuqi Zhang, Ke Wang, Bo Qi, Chengrong Li

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Abstract

The design of insulating structures for transformers under impulse voltage relies predominantly on simulation software due to the absence of experimental validation. This underscores the pressing need for comprehensive research into the spatial electric field and charge properties of oil-paper/pressboard insulation systems. In response to this imperative, a suite of specialized instruments leveraging the Kerr electro-optic effect to meticulously measure the spatial electric field within oil-pressboard structures under impulse voltage was established. As the precision of measurements hinges upon a multitude of influencing factors, this study embarks on a multifaceted examination, centering its focus on four pivotal dimensions: incident laser beam angle, electrical noise, temperature and non-ideal optical elements. A quantitative calculation method for electric field measurement errors was presented, and on the basis of which, suppression methods are proposed for the error sources having the largest impacts on the experimental results. Finally, the overall measurement uncertainty of the device is systematically evaluated.

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基于克尔电光效应的脉冲电压下变压器油电场测量的影响因素和不确定性分析

由于缺乏实验验证，冲击电压下变压器绝缘结构的设计主要依赖于模拟软件。因此，迫切需要对油纸/压板绝缘系统的空间电场和电荷特性进行全面研究。针对这一迫切需要，我们建立了一套利用克尔电光效应的专用仪器，用于在脉冲电压下细致测量油纸板结构内的空间电场。由于测量精度取决于多种影响因素，本研究从多方面进行了考察，重点关注四个关键维度：入射激光束角度、电噪声、温度和非理想光学元件。研究提出了电场测量误差的定量计算方法，并在此基础上针对对实验结果影响最大的误差源提出了抑制方法。最后，系统地评估了设备的整体测量不确定性。

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来源期刊

Measurement Science and Technology 工程技术-工程：综合

CiteScore

4.30

自引率

16.70%

发文量

656

审稿时长

4.9 months

期刊介绍： Measurement Science and Technology publishes articles on new measurement techniques and associated instrumentation. Papers that describe experiments must represent an advance in measurement science or measurement technique rather than the application of established experimental technique. Bearing in mind the multidisciplinary nature of the journal, authors must provide an introduction to their work that makes clear the novelty, significance, broader relevance of their work in a measurement context and relevance to the readership of Measurement Science and Technology. All submitted articles should contain consideration of the uncertainty, precision and/or accuracy of the measurements presented. Subject coverage includes the theory, practice and application of measurement in physics, chemistry, engineering and the environmental and life sciences from inception to commercial exploitation. Publications in the journal should emphasize the novelty of reported methods, characterize them and demonstrate their performance using examples or applications.