配电网电力线远程集中抄表系统

远程集中抄表技术(RemoteConcentratedMeterReadingSystem,RCMRS)分为专线通信技术和电力线载波通信技术。专线通信技术特点是通信稳定性好,但需铺设专用通信线路,存在施工量大、综合成本高、维护费用高、旧城区施工难度大等问题。电力线载波通信技术采用配电网络本身固有的电力线作为通信介质,具有充分利用现有资源、易施工、综合成本低、不受环境条件限制等优点。本文分析了低压电力线网络的特性和电力线载波通信。在分析扩频通信的基本原理的基础上,较详细地介绍了电力载波远程抄表系统的硬件模块具体实现方案。

Remote Concentrated Meter Reading System on Power Line

Two schemes are applied in RCMRS. The conventional scheme is based on the special transmission line. In this scheme, special transmission lines are laid to transmit the signals, which greatly enhance the stability of communication. However, the exorbi- tant cost of laying special lines and maintenance, great workload and difficulty in construction prevent it from popularization. The oth- er scheme is based on the electrical power line, which makes use of the power line as transmission media. On the contrary to the former scheme, the overall cost of this scheme is fairly low, whereas, the stability of communication is unwarranted. This article ana- lyzed the power line carrier communication and the characteristic of low voltage power network. And after introducing the principle of SSC, the design of hardware of the system were been discussed, base on spread spectrum technique.