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随着Internet技术和市场应用的快速发展,各种宽带接入方式相继出现,利用电力线进行高速数据传输的新兴技术也取得了重大进展。近年来,电力线通信(Power Line Communications,PLC)技术发展非常迅速,现在已经进入初步应用阶段,更高速率的宽带电力线设备,例如45Mbit/s、85Mbit/s、200Mbit/s等速率的产品相继问世,利用宽带电力线上网已经成为独特的接入方式;PLC系统充分利用电力系统的广泛线路资源,通过OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)等技术可以在同一电力线不同带宽的信道上传输数据。但是由于电网中传输的是强电,而且电网的稳定性比传统的通信网差得多,使得电力线通信线路的电磁环境极为复杂。这就给电力线通信系统提出了更高的电磁兼容要求,电磁兼容技术也成了实现电力线通信所需的关键技术之一。
With the rapid development of Internet technologies and market applications, various broadband access modes have emerged one after another, and significant progress has also been made in emerging technologies that utilize power lines for high-speed data transmission. In recent years, the technology of Power Line Communications (PLC) has developed rapidly. Now it is in the initial stage of application. Higher-speed broadband power line devices such as 45 Mbit / s, 85 Mbit / s, and 200 Mbit / , The use of broadband power line access has become a unique access method; PLC system to make full use of the power system of a wide range of line resources, through OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) and other technologies can be the same power line with different bandwidth channels transfer data. However, since the transmission in the power grid is strong, and the stability of the power grid is much worse than the traditional communication network, the electromagnetic environment of the power line communication line is extremely complicated. This puts forward higher electromagnetic compatibility requirements for the power line communication system. Electromagnetic compatibility technology has also become one of the key technologies required for power line communication.