固体电介质空间电荷的光电子学测量方法研究进展  被引量:7

Advances in optoelectronics-based measurement of space charge in solid dielectrics

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作  者:王健 李庆民 任瀚文 李承前 高浩予 刘涛 WANG Jian;LI Qing-min;REN Han-wen;LI Cheng-qian;GAO Hao-yu;LIU Tao(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区:[1]新能源电力系统国家重点实验室,华北电力大学,北京102206 [2]中国电力科学研究院有限公司,北京100192

出  处:《电工电能新技术》2020年第3期55-66,共12页Advanced Technology of Electrical Engineering and Energy

基  金:国家自然科学基金项目(51929701,51737005,51477051);中央高校基本科研业务费专项资金项目(2019QN113);国家留学基金资助项目。

摘  要:为适应直流和电力电子装备中高频绝缘与纳米绝缘材料的电荷测试需求,研究固体电介质空间电荷的高分辨率快速测量方法已成为该领域的重要发展方向。本文首先分析了影响空间电荷测量分辨率和跟踪速度的关键因素,并综述了当前流行的非光学测量方法的研究现状及应用局限性,进一步对采用光学元件作为激励源的激光诱导压力波法、激光光强调制法和基于Pockels效应的新型测量方法的相关研究进展进行了梳理和评述,最后归纳出研制高时空分辨率空间电荷测量系统所面临的技术挑战。分析指出,非光学测量方法受限于测量信噪比和自身系统特性,难以完全满足高频和脉冲电应力下快速响应和高分辨率的测量要求,而基于光电子学的测量方法具有高信噪比和高系统带宽等特点,为发展纳米级分辨率的电荷快速测量方法提供了潜在技术途径,但仍需开展更深入的研究工作。Development of space charge measurement technology with high spatial resolution and fast response for solid dielectrics becomes an important research focus in the area,so as to meet the special requirement of charge measurement for high frequency insulation and nano-composite materials with DC and power electronics equipment.In this paper,the principal factors that affect spatial resolution and tracking speed of the measurement methods are elucidated in the first stance,and state-of-the-art of the prevailing non-optical methodologies as well as their application limits are also briefly summarized. Further,research progress review of the measurement methods utilizing optical elements as the excitation sources is fully accounted,including laser-induced pressure pulse method,laser intensity modulation method and new methods based on Pockels effect. Finally,the technological challenges in developing a space charge measurement system with high spatial resolution and quick response are presented. The proposed analysis indicates that,it is difficult for the non-optical schemes to fully achieve both high speed and high resolution measurement due to limitations of signal-to-noise ratio and the system performance itself. By contrast,the optoelectronics-based methods that render high signal-to-noise ratio and wide bandwidth present potential technological approaches in realizing fast space charge measurement together with high spatial resolution,but still need further in-depth investigations.

关 键 词:空间电荷 光电子学 高频绝缘 纳米绝缘 

分 类 号:TM85[电气工程—高电压与绝缘技术]

 

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