摘要
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 application of Internet technology and the rapid development of the market, the various ways of broadband access emerge in succession. The new and developing technologies, such as the high-speed data transmission by using the power lines, have achieved significant progress. In recent years, the PLC （Power Line Communications, PLC） technology develops quickly, has now entered the initial application stage, and the broadband power line equipments of higher rates, such as 45 Mbit / s, 85 Mbit / s, 200 Mbit / s, have come out one after another, the use of line broadband power line for Internet access has become a unique way. PLC systems, taking full advantage of the wide-spread line resources of the power system and through OFDM （Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing） technology can implement data transmission over the channel of same power line but with different bandwidth. However, the fact that the power grid is for heavy current transmission, and the grid is much worse in stability than traditional telecommunication network, has made the electromagnetic environment of power line communication system extremely complicated. This has posed a higher electromagnetic compatibility requirement to the power line communication system, and the electromagnetic compatibility has thus become the key technology for realizing power line communication.
出处
《通信技术》
2008年第12期34-36,共3页
Communications Technology
关键词
电力线
EMC
电磁干扰
PLC
Power Line
EMC
Electromagnetic interference
PLC
