认知电力线载波通信技术在配电网的应用

Application of Cognitive Power Line Carrier Communication Technology in Distribution Network

电力线信道环境复杂多变,为了提供可靠、稳定的通信支撑,文章提出了一种认知电力线载波通信技术。该技术通过信道特性认知而自适应地选择最佳工作频段,同时利用数字前端技术、次优对数概率比技术及快速频率认知的点对点MAC协议等关键技术,可极大减小系统的丢包率。认知电力线载波通信系统在国网绍兴供电局多个配电网场景进行了测试和验证,结果表明,通过信道认知技术,在不同测试线路均能找到一个最佳通信频段,确保系统的可靠通信。

In order to provide reliable and stable communication service in harsh power line channel, this paper proposes a cognitive power line carrier communication technology. It is able to select the best working band in a certain frequency range by channel cognition. Besides, it takes advantage of digital front end, sub-optimal probability ratio and point-to-point quickly frequency cognition MAC layer protocol technologies, to reduce packet error ratio significantly. Cognitive power line carrier communication system is tested and verified in several distribution network scenarios in Shaoxing. The results show an optimal communication frequency band can be found to ensure reliable communication using channel cognition technology in each scenario.