负载对低压电力线载波信道阻抗影响的特性分析

The characterization of impedance effect form loads in low-voltage power line carrier channel

低压电力线载波通信直接面向用户,不可避免地接入了一些用电器负载.多数电力线负载前端设计有电源滤波器,其作用主要是滤除50 Hz以上的噪声信号,保证干净的设备供电环境.但这些滤波器对电力线载波通信提出了极大的挑战,它们对电力线载波通信信号具有很强的吸收作用,在接收灵敏度一定的条件下,降低了通信的传输距离.基于Matlab环境建立低压电力线的通信仿真,探讨用电器负载的电源滤波电容对低压电力线通信时的影响.

Low-voltage power line carrier communication, facing the user directly, access electrical loads inevitably. Power fihers having been designed in almost of the front-end of the power line loads, its main function is to fher the noise signal whose frequency is over 50 Hz to ensure clean equipment supply environment. But these filters challenged greatly to power line carrier communication, they have strong absorption for power line carrier communication signal. Under conditions of certain receive sensitivity, transmission distance of communication reduces. Communication simulation of low-voltage power lines was established with Matlab environment, and it is explored and analyzed communication impacts of power supply filter capacitor of electrical loads in low-voltage power line.