The adoption of intellectual distribution system enables the substation to realize the functions of "three remotes (remote measuring, remote communication and remote control), and nobody is required to be on duty at the substation.

This article introduces the patulous alarm of dottodot communication equipment A9800,and discusses a method to receive the remote signal of power supply system by rebuilding structure of this system and using remaining meet of alarm relay.

The reasons of transmitting false remote signals in substation integrated automation system were analyzed,and the improvement measures were put forward.

Development of monitor system for remotely measuring remote signal for water supply of the water supply plant of Maanshan Iron & Steel Co.

Analysis and countermeasure to mis-operation of remote signaling in Zhangjiajie electric power corporation;

The object-oriented programming idea is adopted, by using microsoft communication and DBcom control to design this system according to communication protocol and implement the functions of remote metering, remote signaling, remote control, and remote regulating.

During the course of RTU gathering remote information , including remote signals and special reports from microcomputer-based protection, it often occurs that remote signals are mal_transmitted or lost and protection reports are missed or abnormal.

It not only organize and send telesignal data, telemetering data, pulse counter data and frequency data etc to the main station but also receive the command.

The method for solving the problems in the practical use of the ministry new issue CDT telecontrol communication protocol(DL451-91),such as searching the synchronous word,representing the range of remote measurement quantity and the insufficient points number of telesignalisation energy pulse number,was put forward.