极性反转电压下非线性电导硅橡胶复合材料电荷积聚特性

doi:10.11930/j.issn.1004-9649.202004114

中国电力 ›› 2020, Vol. 53 ›› Issue (9): 150-156,165.DOI: 10.11930/j.issn.1004-9649.202004114

• 高压电缆及附件关键技术专栏 • 上一篇下一篇

极性反转电压下非线性电导硅橡胶复合材料电荷积聚特性

杨卓然¹, 杜伯学², 李忠磊², 韩冲², 张程³

1. 国网南京供电公司，江苏南京 210019;
2. 天津大学电气与自动化工程学院，天津 300072;
3. 国网江苏省电力有限公司检修分公司，江苏南京 211100

收稿日期:2020-04-14 修回日期:2020-06-09 发布日期:2020-09-09
作者简介:杨卓然(1990—)，男，博士，工程师，从事直流电缆附件绝缘材料性能研究与评估，E-mail：yangzhuoran@126.com;杜伯学(1961—)，男，通信作者，教授，博士生导师，从事聚合物绝缘材料的可靠性和安全性理论与试验、高温超导电介质、纳米复合绝缘材料、电气绝缘在线监测、高电压新技术等研究，E-mail：duboxu@tju.edu.cn;李忠磊(1989—)，男，博士，副教授，从事聚合物绝缘电荷特性研究与评估，E-mail：lizhonglei@tju.edu.cn
基金资助:
国家重点研发计划资助项目(±500 kV直流电缆绝缘设计基础，2016YFB0900701)；国家自然科学基金资助项目(高压直流电缆附件绝缘老化与破坏机理及抑制方法研究，51537008)

Charge Accumulation Characteristics of Nonlinear Conductive SIR Composites under Polarity Reversal Voltage

YANG Zhuoran¹, DU Boxue², LI Zhonglei², HAN Chong², ZHANG Cheng³

1. State Grid Nanjing Power Supply Company, Nanjing 210019, China;
2. School of Electrical Engineering & Automation, Tianjin University, Tianjin 300072, China;
3. State Grid Jiangsu Electric Power Co., Ltd. Maintenance Branch Company, Nanjing 211100, China

Received:2020-04-14 Revised:2020-06-09 Published:2020-09-09
Supported by:
This work is supported by the National Key Research and Development Program of China (±500kV DC Cable Insulation Design Foundation, No.2016YFB0900701), the National Natural Science Foundation of China (Investigation on Ageing and Breakdown Mechanism and Suppression Method of High Voltage Direct Current Cable Accessory Insulation, No.51537008)

摘要/Abstract

摘要： 直流电缆附件是直流输电系统的薄弱环节，为研究非线性电导对极性反转电压下电缆附件硅橡胶绝缘电荷积聚特性的影响，通过添加SiC颗粒制备具有非线性电导的硅橡胶复合材料试样，利用三电极法和表面电位测量系统获得试样的电导率和表面电荷特性。实验结果表明：由于试样中SiC晶粒的晶格振动引起载流子晶格散射，高温会造成试样电导率降低；试样表面电荷平面分布特性表明，电晕电压极性反转后，平板试样内部残留的原极性电荷与表面的异极性电荷提高了局部电场强度，使试样的电导率升高，加速了表面电荷向试样内部迁移和异极性电荷中和过程，抑制了表面电荷的积聚。

关键词: 非线性电导, 温度, 极性反转, 硅橡胶, 高压直流电缆附件

Abstract: The HVDC cable accessory is the weak point of the cable system. In order to study the effect of the nonlinear conductivity on the charge accumulation property of SiR cable accessory insulation under polarity reversal voltage, this paper prepared a SiR composites sample by mixing the SiC particle with the SiR matrix. The three-electrode method and the surface charge measurement system are applied to obtain the conductivity and surface charge properties. The result shows that the crystal lattice vibration in SiC causes the scattering of carriers, resulting in the decrease in conductivity of sample at high temperature. The surface charge properties of SiR composites sample under polarity reversal voltage indicate that the induced electric field between the surface charges and the heteropolar charges increases the conductivity of SiR composites after the polarity reversal of corona voltage, which accelerates the transfer of surface charge into the inside and the neutralization between heteropolar charges, subsequently suppressing the surface charge accumulation.

Key words: nonlinear conductivity, temperature, polarity reversal, SiR, HVDC cable accessories

杨卓然, 杜伯学, 李忠磊, 韩冲, 张程. 极性反转电压下非线性电导硅橡胶复合材料电荷积聚特性[J]. 中国电力, 2020, 53(9): 150-156,165.

YANG Zhuoran, DU Boxue, LI Zhonglei, HAN Chong, ZHANG Cheng. Charge Accumulation Characteristics of Nonlinear Conductive SIR Composites under Polarity Reversal Voltage[J]. Electric Power, 2020, 53(9): 150-156,165.

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极性反转电压下非线性电导硅橡胶复合材料电荷积聚特性

Charge Accumulation Characteristics of Nonlinear Conductive SIR Composites under Polarity Reversal Voltage

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极性反转电压下非线性电导硅橡胶复合材料电荷积聚特性

Charge Accumulation Characteristics of Nonlinear Conductive SIR Composites under Polarity Reversal Voltage

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