【摘要】 空气开关是低压配电网中重要的电器设备。然而由于其内部的特殊结构,导致对电力线通信信号某些频段产生深度衰减。为了深入研究空气开关对通信信号的衰减规律,准确建立空气开关的高频电路模型是非常必要的。文章基于二端口网络散射参数与阻抗、传输参数间的转换关系以及串并联谐振电路特性建立了空气开关的高频电路模型,通过MATLAB仿真与实际测量结果的对比分析,验证了空气开关高频等效电路模型的可行性。该空气开关的高频电路模型能够较为准确地表达空气开关的阻抗及传输特性,建模方法简单适用,为低压电器建模提供了参考。更多还原

【Abstract】 The air switch is one of important electrical equipment in the low voltage distribution network. However,due to its internal special structure,it will produce deep attenuation of the power line communication signal in some frequency bands. In order to study the attenuation law of the air switch on the communication signal,it is necessary to accurately establish the high frequency circuit model of the air switch. The air switch high-frequency circuit model is established based on the conversion relationship between scattering parameters,the impedance and the transmission parameters of the two-port network and the characteristics of the series-parallel resonant circuit. The feasibility of the high frequency equivalent circuit model of air switch is verified by the comparison between MATLAB simulation and actual measurement results. The high-frequency circuit model of the air switch can accurately indicate the impedance and transmission characteristics of the air switch. At the same time,the modeling method is simple and applicable,which provides a reference for low voltage electrical modeling.更多还原