基于散射参数测量的单口无源设备宽频建模

摘要

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 .