基于时域有限元的特快速暂态过电压仿真新方法  

A New Simulation Calculation Method for VFTO Based on Time Domain Finite Element Method

作　　者：刘教民[1] 杜巍[1] 王震洲[2] 孙祎[2] 李永刚[1] 方新春[3] 

机构地区：[1]华北电力大学电气与电子工程学院,保定071003 [2]河北省电力公司电力科学研究院,石家庄050021 [3]河北工业大学电气工程学院,天津300130

出　　处：《电工技术学报》2013年第11期286-292,共7页Transactions of China Electrotechnical Society

基　　金：河北省自然科学基金(E2012208006);河北省教育厅高等学校科学研究计划自然科学优秀青年基金(Y2012018);中央高校基本科研业务费专项(12QX26)资助项目

摘　　要：提出了一种基于时域有限元(TDFEM)的特快速暂态过电压(VFTO)仿真计算方法。针对传输线电报方程,首先对其进行空间上的离散和插值,并采用点匹配有限元法构造有限元方程,然后采用时间步积分法对电报方程进行时间上的积分和离散,最终得到传输母线暂态响应的迭代公式。针对集中参数元件,将其看作一个单位有限元进行处理,根据相应的电压电流约束关系得到了对应的迭代公式。通过与国际上认可的电磁暂态计算软件EMTP的计算结果进行对比,验证了本文方法的正确性。与EMTP的计算方法相比,本文提出方法的优势是可以获得传输线沿线所有点的电压和电流离散值,并可以考虑母线残余电荷电压的分布特性。A time domain finite element method（TDFEM） applied to the VFTO simulation calculation is presented. For the general telegraph equations, the spatial derivatives are discrete and interpolation firstly, and points matching finite element method is used to structure finite element equations, and the time step integration method is adopted to telegraph equation of integral and discrete time, and then the iteration formula of VFTO transient response is obtained. For lumped parameter elements, it is processed as a finite element. According to the corresponding voltage current constraint relation, the iteration formula is obtained. With internationally recognized electromagnetic transient calculation software EMTP calculation results are compared to verify the correctness of the proposed method. Compared with the EMTP, the advantage of the proposed method can calculate the voltage and current discrete values at all points along the transmission line. At the same time, the trapped charge distribution characteristic of the transmission line is taken into consideration.

关 键 词：特快速暂态过电压 时域有限元 仿真计算 电磁暂态程序(EMTP) 

分 类 号：TM501[电气工程—电器]