基于散射参数测量的单口无源设备宽频建模

Passive Single-port Device Wide-band Modeling Based on Scattering Parameter Measurements

单口无源类设备如电抗器、电容器等在电力系统中有着广泛的应用,发展单口设备的宽频等效电路建模方法,是研究电力系统电磁兼容以及过电压分析等问题的基础。采用一种快速等效电路建模方法,基于设备端口散射参数的测量,从设备的宽频阻抗特性出发得到设备的宽频等效电路模型,并引入数学优化算法进一步对模型参数加以优化。最后,在100 Hz^30 MHz的频率范围内建立实际电抗器宽频电路模型,并比较模型与实际设备在频域以及时域的相应特性,验证了该方法的可行性。

Passive single-port equipment such as reactor and capacitor has a wide application in the power system, so development of single-port equipment wide-band equivalent circuit modeling method provides foundation for re- searching the power system electromagnetic compatibility and the problem of over voltage analysis. In this paper, a fast equivalent circuit modeling method was used and wide-band equivalent circuit was established basing on the scattering parameter measurement. In addition parameters was optimized through mathematical optimization algo- rithm. Finally, circuit model of a reactor was established in the frequency range of 100 Hz -30 MHz, comparing the model with the actual equipment in the frequency domain and the time domain. Therefore, the result may verify the efficiency of the method.