摘要
通过实验方法测量了终端短路和开路两种情况下屏蔽电缆各导体之间的输入阻抗,进而可以得到屏蔽电缆的单位长串联阻抗矩阵和并联导纳矩阵。为了便于瞬态分析,在复频域采用矢量匹配法,得到了单位长串联阻抗矩阵和并联导纳矩阵的时域形式,并在此基础上基于递归卷积推导了求解电缆上各点电压和电流瞬态响应的时域有限差分法迭代公式。最后,通过两个算例验证了该文测量方法和计算方法的有效性。
The proposed experimental method involves only the input impedance measurements for the short- and open-circuit tests. Compared with the traditional method, the direct measurements of voltage and current can be avoided. For the convenience of the transient analysis, the vector fitting method is adopted to obtain simple time-domain form of the frequency dependent impedance and admittance. Based on the recursive algorithm for time-domain convolution, the corresponding voltage and current recursion formulations are presented. At last, the finite difference time-domain (FDTD) method is used for the transient analysis of shielded cable. The results indicate that the calculated results are consistent with the experimental results. Thus the experimental and calculating methods presented in this paper are demonstrated to be effective.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第6期119-123,共5页
Proceedings of the CSEE
基金
国家杰出青年科学基金(50325723)
高等学校优秀青年教师教学科研奖励计划基金。~~
