摘要
空间电荷会畸变固体电介质内的电场分布,进而加速绝缘材料的老化与击穿过程。由于空间电荷输运涉及电荷注入、迁移、入陷与脱陷等复杂微观过程,相关知识比较抽象,学生难以理解。为此开展相关课程的实践教学,建立固体电介质空间电荷分布实验与仿真平台。该平台基于电声脉冲法搭建,由高压直流电源、高压脉冲电源、空间电荷测量模块与数据采集系统组成;仿真平台基于双极性载流子输运模型,考虑了电荷的注入、传输、入陷、脱陷、复合与抽出等微观物理过程。通过实验与仿真的结合,能直观展示空间电荷分布特征;可针对电荷注入与输运等微观过程进行分析,强化学生对高电压技术相关知识的理解,提高学生自主创新和工程实践的能力。
Space charge distorts the electric field distribution in solid dielectrics, which accelerates the aging and breakdown of insulation materials. Since transportation of space charge involves complex microscopic processes including charge injection, migration, trapping and detrapping, the relevant knowledge is relatively abstract and difficult for students to understand.Experimental and simulation platforms for space charge distribution in solid dielectrics are built. The space charge measurement system is based on the pulsed electro-acoustic(PEA) method, which is composed of high-voltage dc source, pulse source, space charge measurement module and data acquisition system. The simulation platform is based on the bipolar carrier transport model, which takes the charge injection, transportation, trapping, detrapping, recombination and extraction into account. By combing the experimental and simulation platforms, the space charge distribution can be intuitively displayed, and the microscopic process of charge injection and transportation can be readily analyzed. The platform can strengthen students understanding of high-voltage technology-related knowledge and improve their independent innovation ability and engineering practice ability.
作者
朱明晓
陈继明
孟庆伟
董磊
ZHU Mingxiao;CHEN Jiming;MENG Qingwei;DONG Lei(College of New Energy,China University of Petroleum(East China),Qingdao 266580,Shandong,China)
出处
《实验室研究与探索》
CAS
北大核心
2022年第11期109-113,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金(52007198)
山东省自然科学基金(ZR2019QEE014,ZR2021ME027)
中国石油大学(华东)青年教师教学改革项目(QN-202013)。
关键词
高电压技术
空间电荷
实验与仿真平台
电声脉冲法
双极性载流子输运模型
high voltage engineering
space charge
experimental and simulation platform
pulsed electro-acoustic method
bipolar carrier transport model
