| 温度梯度场对高直流电压下聚乙烯中空间电荷及场强畸变的影响 |
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| 引用本文： | 陈曦,王霞,吴锴,彭宗仁,成永红.温度梯度场对高直流电压下聚乙烯中空间电荷及场强畸变的影响[J].电工技术学报,2011(3):13-19. |
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| 作者姓名： | 陈曦 王霞 吴锴 彭宗仁 成永红 |
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| 作者单位： | 西安交通大学电力设备电气绝缘国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(50907050) |
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| 摘 要： | 高压电缆运行中由于导体发热引起绝缘由内到外形成温度梯度.直流电压下温度梯度的存在必然会影响电荷的注入和迁移,同时引起绝缘电阻的梯度变化进而引起场强的梯度变化,加剧了位于绝缘层外表面的电荷积聚和场强畸变,降低了电缆的使用寿命.因此研究温度梯度场下直流绝缘中空间电荷分布及场强畸变特性,对新型直流电缆绝缘设计具有较高的理论和...
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| 关 键 词： | 聚乙烯 空间电荷 温度梯度 直流电场 畸变 |
Space Charge Accumulation and Stress Distortion in Polyethylene Under High DC Voltage and Temperature Gradient |
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| Chen Xi Wang Xia Wu Kai Peng Zongren Cheng Yonghong.Space Charge Accumulation and Stress Distortion in Polyethylene Under High DC Voltage and Temperature Gradient[J].Transactions of China Electrotechnical Society,2011(3):13-19. |
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| Authors: | Chen Xi Wang Xia Wu Kai Peng Zongren Cheng Yonghong |
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| Affiliation: | Chen Xi Wang Xia Wu Kai Peng Zongren Cheng Yonghong(State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China) |
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| Abstract: | Temperature gradient across cable thickness is caused by Joule heat originating from the current in the HV cable conductor,which must influence the injection and migration of charge,lead to the gradient of insulation resistance and then the gradient of electrical field.As a result,the lifetime of cable is decreased due to charge accumulation and stress distortion at the outer surface of insulation.So,it is a high theory and engineering values for new direct current(DC) cable insulation design to study the s... |
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| Keywords: | Polyethylene space charge temperature gradient DC stress distortion |
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