均匀传输线电路模型参数的测试

A Genetic Based Fault Location Algorithm for Transmission Lines

提出均匀传输线原始参数的求解方法.在均匀传输线终端开路的状态下,测量终端、始端以及其他各个测试点的电压,根据均匀传输线的正弦稳态解,利用matlab求解非线性方程组,计算出不同频率下的衰减常数β和相移常数α,进一步求解含原始参数的非线性方程组,得到均匀传输线的4个原始参数.均匀传输线电路模型原始参数的确定为传输线的理论研究提供了计算的依据.用实验的方法获取均匀传输线的原始参数,比利用软件仿真获取的结果更具真实,更符合实际情况,经过实验验证,提出的均匀传输线电路模型参数的测试方法是正确有效的.

The method used to measure parameters of uniform transmission lines is introduced according to the circuit model and the sine steady-state voltage equation of tdegraph equation of uniform transmission line. When the terminal is open, the voltage of beginning,terminal and other measurement points are acquired, then the attenuation constant β and phase constant α of different frequency are acquired by solving the non-linear sine steady-state equation with the voltage, in this process, matlab is used. After acquire different β and α, the function equation describing the relationship of β, a and the primitive parameters of uniform transmission lines and frequency of signal resource is used to acquire the four primitive parameters. The determination of circuit model primitive parameters of uniform transmission lines provide calculation reliance of theory research of transmission lines. Primitive parameters acquisition by experiment is more actual and more accordantto practical situation than the parameters acquired of software simulation. The method has been proved to be accurateand effective through experiments.