应用聚合物绝缘材料的直流电缆内部电场数值计算方法  

Numerical Calculation Method for Internal Electric Field of the DC Cable Applying Polymer Insulating Material

作　　者：赵志斌 尚康良 范思远 马丽斌 曹均正 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]全球能源互联网研究院,北京市昌平区102209 [3]中电普瑞电力工程有限公司,北京市昌平区102200

出　　处：《智能电网》2016年第10期1019-1023,共5页Smart Grid

摘　　要：针对电缆本体轴对称的特殊性,将其简化为一维模型,结合聚合物材料电导率的两种常用表达式,推导其内部电场、电荷和温度场的计算式,并结合实际电缆结构与COMSOL软件的计算结果进行对比验证。结果表明,在考虑电缆绝缘材料非线性的情况下,材料内部存在体电荷,其计算方程为抛物型偏微分方程,可以用较通用的方法求解。所推导的计算方法可以推广到考虑电缆内部存在以分散电荷形式的放电点等情况下的建模计算。For the particularity that the cable ontology is axisymmetric, the calculation formulas of the electric field, charge and temperature field inside the cable are deduced by using a one-dimensional simplified model combined with the two kinds of commonly used expressions of the conductivity of polymer materials, and the formulas are verified by comparing with the COMSOL software calculation results using actual cable structure. The results show that the material has internal volume charge, considering the cable insulation material nonlinearity. The calculation formulas are parabolic partial differential equations which can be solved by common methods and can be applied to modeling calculations under many conditions such as considering that there are discharge points in the form of scattered charge within the cable.

关 键 词：高压直流电缆 抛物型微分方程 非线性材料 电场分布 电荷分布 

分 类 号：TM247[一般工业技术—材料科学与工程]