基于电力线载波低压电缆防盗方案

电力电缆被盗对电力系统造成了严重的安全威胁和财产损失。本文设计了一套基于电力线载波通信的电缆防盗报警方案。载波通信通过扩频调制解调电路来实现。防盗报警系统由报警主站和线路探测终端组成,报警主站根据与各线路探测终端的载波通信成败或者所接收的终端状态信息数据来判断是否发生电力电缆被盗等异常信息,当异常状态出现时,报警主站通过GSM网络拨打电话和短信息发送向远端值班室人员传送警情。同时本文介绍了如何克服电力线上的噪声对载波的干扰,以及如何对断点进行定位的方案。

Method of low power cable guarding based on power line carrier

Theft of power cables have caused a serious security threat and property losses to the power department. This article designs a method of guarding system based on the power carrier. Carrier communication is achieved through spread spectrum modulation and demodulation circuit. The whole system consists of the host station and circuitry probing terminals. While the system is working, the host station can communicate with every circuitry probing terminal and judge if theft of power cables happened or not according to the state of communication or information of terminals. Once abnormal state appears, calls and short message of alarming can be made to the guard person in the long-rang guard station by GSM network. In this article, it＇s also introduced that how to get rid of the interference of carrier caused by noise on power line, and how to locate the breakpoint.