[1]李春茂,陈子宣,杨 雁,等.基于修正Cole-Cole模型的氧化锌压敏电阻老化状态评估[J].高压电器,2020,56(02):85-92.[doi:10.13296/j.1001-1609.hva.2020.02.013 ]
 LI Chunmao,CHEN Zixuan,YANG Yan,et al.Aging State Evaluation of ZnO Varistor Based on Cole-Cole Modified Model[J].High Voltage Apparatus,2020,56(02):85-92.[doi:10.13296/j.1001-1609.hva.2020.02.013 ]
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基于修正Cole-Cole模型的氧化锌压敏电阻老化状态评估()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年02期
页码:
85-92
栏目:
研究与分析
出版日期:
2020-02-14

文章信息/Info

Title:
Aging State Evaluation of ZnO Varistor Based on Cole-Cole Modified Model
作者:
李春茂 陈子宣 杨 雁 陈锡成 朱 航 高 波 吴广宁
(西南交通大学电气工程学院, 成都 610031)
Author(s):
LI Chunmao CHEN Zixuan YANG Yan CHEN Xicheng ZHU Hang GAO Bo WU Guangning
(School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)
关键词:
氧化锌压敏电阻 冲击老化 频域介电谱 Cole-Cole模型 活化能
Keywords:
ZnO variousimpulse agingfrequency-domain dielectric spectroscopyCole-Cole modelactivation energy
DOI:
10.13296/j.1001-1609.hva.2020.02.013
摘要:
为了将频域介电响应法(FDS)用于氧化锌压敏电阻老化状态的无损检测,在实验室环境下对氧化锌压敏电阻进行冲击老化试验,测量其介电频谱,并引入了带直流电导的多驰豫Cole-Cole模型拟合分析氧化锌压敏电阻的介电频谱。通过双驰豫Cole-Cole模型拟合常温下的介电谱发现,其中存在α驰豫过程和β驰豫过程,其对应的活化能约为0.68 eV和0.34 eV,对应着非本征晶间相缺陷驰豫和本征氧空位缺陷驰豫,α驰豫强度Δεα随冲击次数的增加而增强,而β驰豫过程不受冲击老化的影响;在拟合高温下(393 K)的介电频谱时新发现γ驰豫过程,其活化能约为0.73 eV,对应着非本征晶界面缺陷驰豫,随着老化程度的加深,驰豫强度Δεγ、形状参数γ增大,驰豫时间τγ和活化能减小;直流电导σDC随着冲击次数的增加而变大,其对应的活化能约为0.72 eV,随着冲击次数的增加而减小。因此,可通过修正的多驰豫Cole-Cole模型参数σDC、Δεα、Δεγ、τγ、γ和直流电导活化能、γ驰豫活化能综合评估氧化锌压敏电阻的老化状态。
Abstract:
To apply frequency-domain dielectric spectroscopy technology(FDS)to the non-destructive diagnosis of ZnO varistor’s aging state, impulse aging treatment of ZnO varistor was conducted,and the frequency-domain spectra of the sample with different impulse times were obtained in laboratory environment. The multi-relaxation Cole-Cole model with DC conductance was introduced to analyze the frequency-domain spectra of the ZnO varistor. The double relaxation Cole-Cole model was used to fit the frequency-domain spectra, which were measured at room temperature. It was found that there were α and β relaxation processes with the activation energy about 0.68 and 0.34 eV,which related to the intergranular phase in Bi-rich microregions and the oxygen vacancy respectively. The intensity of α relaxation process increased with aging,while β relaxation process kept stable. A new γ relaxation process with the activation energy about 0.73 eV was observed at the temperature about 393 K. The γ relaxation process related to the interface states due to ZnO-ZnO homojunction, and as the impulse times increased,its activation energy and relaxation time decreased,but its relaxation intensity and shape parameter increased. With the increase of the impulse times,the DC conductivity increased obviously,and the activation energy dropped from 0.72 to 0.64 eV. Therefore,the aging status of ZnO varistor can be assessed comprehensively through activation energy of DC conductance, activation energy of γ relaxation process, as well as σDC, Δεα, Δεγ,τγ and γ,which are extracted from the modified multi-relaxation Cole-Cole model.

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备注/Memo

备注/Memo:
收稿日期:2019-07-24; 修回日期:2019-09-26基金项目:国家杰出青年基金(51325704)。Project Supported by National Science Fund for Distinguished Young Scholars (51325704).李春茂(1963—)-,男,博士,教授,主要从事电工理论与新技术、电力电子系统电磁兼容及故障诊断等领域的研究。
更新日期/Last Update: 2020-02-14