提出一种采用PM Ⅱ (电源监视器 )、PLC(可编程控制器 )及上位机构成电力监测系统 .该系统由 2个主站和若干个子站构成 .主站与子站之间以同轴以太网互联 ,通过网络数据交换实现数据共享 .该系统的突出特点是 :现场数据采集和设备控制由PM Ⅱ与可编程控制器实现 ,操作系统选Windows95 ,系统软件具有友好的图形用户界面 .实现数据动态显示、事故自动报警、定时报表打印、在线信息查询、安全权限检查等多项功能 . A power monitoring system using PM Ⅱ (power monitor), PLC (programmable logic controller) and host computer is proposed.The system consists of two main stations and several substations.The main station and substations are coaxial Ethernet interconnection, data sharing through the network to achieve data sharing.The salient features of the system are: field data acquisition and device control by the PM Ⅱ and programmable controllers, the operating system selected Windows95, the system software has a friendly graphical user interface. Data dynamic display, automatic alarm, regular report printing, online information inquiry, security authority checking and many other functions.