自动观测设备工频信号干扰正弦稳态分析

Analysis on the sinusoidal steady-state of automatic observation system under power frequency interference

为分析自动观测设备线缆对工频干扰信号的响应,文章利用传输线基本方程,求解分布参数电路的正弦稳态解。通过边界条件的确定,得到了电缆沿线分布的电压和电流。结果表明,若外加干扰信号频率过高或幅度过大,将会使真实数据信号产生相位畸变甚至失真,导致数据错误。

In order to analyze the terminal cable response of automatic observation system with power frequency interference signals, basic transmission line equation method is used to calculate distributed parameter circuit,and the sinusoidal steady-state solution is obtained. With a certain kind of boundary condition,the distributed voltage and current responses along the cable are achieved. The results illustrate that if the external interference signal has a high amplitude or high frequency, the real data signal will be affected,generating a phase distortion and erroneous data.