摘要
含三相单芯电力电缆的高压交流系统继电保护整定及短路电流计算需要获得精确的电缆芯线等效阻抗和导纳参数.首先对考虑各导体层间互感和电容影响的三相单芯电力电缆阻抗及导纳矩阵特征进行了分析,针对电缆外导体层的不同接地方式给出了外导体层中电压电流的边界条件,在此基础上研究了导体层互感和电容的消去方法,提出了三相单芯高压电力电缆芯线等效阻抗和导纳的计算方法.针对三相单芯电缆的一点接地、两端接地、交叉互联接地3种常用接地方式搭建了PSCAD模型,并通过仿真验证了本算法的准确性.
Accurate core equiralent impedance and admittance parameters of power cable are required for relay pro-tection setting and fault current calculation of power system with power cable. The characteristics of impedance and admittance matrix of three-phase single-core power cable were analyzed,taking into consideration the mutual inductance and capacitance coupling between core and conductive layers. The voltage and current boundary conditions of conductive layers in different grounding modes were presented. How to eliminate the influence of mutual inductance and capacitance of conductive layers on core parameters was studied in detail,and then the method for calculating three-phase single-core power cable core equivalent impedance and admittance parameters was proposed. The precision of the method was verified by PSCAD simulation tests in one end to earth mode,double-end to earth mode andcross bonding to earth mode.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CSCD
北大核心
2016年第11期1144-1150,共7页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金资助项目(51207102)
高等学校博士学科点专项科研基金新教师类项目(20120032120085)
关键词
单芯电力电缆
芯线
接地方式
阻抗矩阵
导纳矩阵
single-core power cable
core
grounding mode
impedance matrix
admittance matrix
