高电压技术2018，Vol.44Issue(5)：1443-1449,7.DOI:10.13336/j.1003-6520.hve.20180430007
基于双极性载流子输运模型的高压直流电缆附件绝缘EPDM/LDPE界面电荷的数值模拟
Numerical Simulation of Interface Charge Behaviors Between LDPE/EPDM for HVDC Cable Accessory Insulation Based on the Bipolar Charge Transport Model
摘要
Abstract
HVDC extruded cable is the key equipment of flexible DC transmission technology. However, the interface charge between different dielectrics is easy to accumulate in the HVDC cable accessories due to the discontinuity of conductivity and permittivity, which will threaten the safety of the HVDC cable system. So, the injection and transportation behaviors of space charge in ethylene propylene diene monomer (EPDM)/low-density polyethylene (LDPE) bi-layer dielectrics were simulated by using a bipolar charge transport model with different interface characteristics including the surface states, interface barrier and carrier mobility. Furthermore, the influence of interface charge accumulation on the electrical field distribution in HVDC cable accessory was analyzed. The simulation and test results show that the interface charge density in HVDC cable accessory is increased by the deep surface trap energy level, high interface barrier and large carrier mobility difference. The accumulation of interface charge makes the electrical field distribution more distorted. Therefore, interface charge accumulation in the HVDC cable accessory can be suppressed by improving the surface state distribution and matching degree of carrier mobilities and decreasing the interface barrier.关键词
高压直流电缆附件/界面电荷/双极性载流子输运模型/表面态/界面势垒/载流子迁移率/电场分布Key words
HVDC cable accessory/interface charge/bipolar charge transport model/surface state/interface barrier/carrier mobility/electrical field distribution引用本文复制引用
李进,梁虎成,杜伯学,宋鹏先,孔晓晓,李忠磊..基于双极性载流子输运模型的高压直流电缆附件绝缘EPDM/LDPE界面电荷的数值模拟[J].高电压技术,2018,44(5):1443-1449,7.基金项目
博士后创新人才支持计划(BX201700168)；国家重点研发计划(2016YFB0900701)；国家自然科学基金(51537008)。Project supported by National Postdoctoral Program for Innovative Talents (BX201700168), National Key Research and Development Plan (2016YFB0900701), National Natural Science Foundation of China (51537008). （BX201700168）
