利用弹光效应测量固体电介质空间电荷的高时空分辨方法与实验验证  

High-temporal-spatial Resolution Method and Experimental Verification of Space Charge Measurement in Solid Dielectrics Based on Photo-elastic Effect

作　　者：高浩予 李庆民 任瀚文 李承前 史昀祯 王忠东 GAO Haoyu;LI Qingmin;REN Hanwen;LI Chengqian;SHI Yunzhen;WANG Zhongdong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China;College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX44QJ,UK)

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),北京市102206 [2]埃克塞特大学数学与物理工程学院,英国埃克塞特EX44QJ

出　　处：《中国电机工程学报》2021年第21期7193-7197,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51737005,51929701,52081330507);北京市自然科学基金项目(3202031)。

摘　　要：为支撑复杂应力环境下大功率电力电子装备绝缘可靠设计与状态评估,该文提出一种基于弹光效应的固体电介质空间电荷光学测量方法,并构建信号传变模型。模型分析指出,平衡探测器光强差变化与电荷受扰动所产生弹性波的幅值变化近似成正比关系。接着,基于所构建椭圆偏振测量平台与传感器耦合模型对该探测系统的可行性与空间分辨特性开展实验验证。结果表明,所提探测方法可实现皮秒级脉宽弹性波的追踪测量,具备实现空间电荷高时空分辨的潜力。To support the reliable insulation design and state evaluation of high-power electronic equipment under the circumstance of complex transient stress,this paper proposed a space charge measurement method with high resolution and rapid measurement and constructed the multi-state signal transmission model in the charge measurement process.The model demonstrated that the elastic wave generated from the electric charge perturbed by the terahertz pulse was approximately proportional to the light intensity difference detected by the balanced detector.Then,the ellipsometric measurement platform and the simulation model of piezoelectric actuator and sensor was designed and constructed to verify the feasibility of the proposed optical measurement method.The related work in this article can provide a reference for the development of rapid space charge measurement technology with high temporal and spatial resolution.

关 键 词：空间电荷 弹光效应 椭圆偏振测量 信号传变过程 测量分辨率 

分 类 号：TM93[电气工程—电力电子与电力传动]