基于矢量匹配法和遗传算法的频变输电线建模  

Model of Frequency-dependent Transmission Line Based on Vector Fitting and Genetic Algorithm

作　　者：张炳达[1] 赵紫昆 郭凯[1] 黄杰[1] 冯鑫[1] 

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力系统及其自动化学报》2016年第6期14-18,共5页Proceedings of the CSU-EPSA

基　　金：天津市科技计划资助项目(13TXSYJC40400);国家自然科学基金资助项目(51477114)

摘　　要：为避免矢量匹配法建立的频变输电线暂态模型易受初始迭代极点的影响,该文提出了一种矢量匹配法与遗传算法相结合的频变输电线等值电路建模方法。通过构造迭代极点的适应度函数,对矢量匹配过程中出现的迭代极点群体实施遗传操作,力求快速获取具有全局最优的特性导纳、延时函数的近似有理式。同时,为保证近似有理式的稳定性,采用线性约束最小二乘法实施参数拟合。实践表明,该方法构建的频变输电线暂态模型有较高的仿真精度。The transient model of frequency-dependent transmission line,established by vector fitting,may be affectedby initial iterative points easily. An equivalent circuit modeling method of frequency-dependent transmission line basedon the combination of vector fitting and genetic algorithm is put forward in this paper. Genetic operations will be imple-mented in the group of the iterative points appeared during the vector fitting by constructing the fitness function,striv-ing to obtain the global optimal approximate rational expression of characteristic admittance and delay function quickly.Meanwhile linear constraint least square method will be adopted in the parameter fitting to guarantee the stability of theapproximate rational expression. It is proved that the frequency-dependent transmission line transient model establishedby this method has higher simulation accuracy.

关 键 词：矢量匹配 遗传算法 输电线 暂态模型 

分 类 号：TM711[电气工程—电力系统及自动化]