| Power system remote is a key means of system stability circulate. The dependability of remote signal delivery is very important, so two channels—a master channel and a slave channel are needed for each remote equipment to guarantee the dependable delivery of remote signal. Both the work conditions of the remote equipments and signal channels in electric power system affect the reliability of all systems directly. Therefore, the monitor technique is of great importance. These data including the work condition of far terminal's equipments and the transmission of signal channels inspected real time should be transferred to control center. If there is any problem, the system is needed to switch the channel. But there are lots of problems in practically application, for example: the system can not switch automatically when there is something wrong, needing men to accomplish, which brings about the delay of signal and the waste of human resource. Once something unusual happens, the control equipment cannot distinguish remote terminal unit (RTU) problems from channel problems.The electric power remote technique is the foundation of the electric power dispatch automation. The condition of electric power remote signal channels is the key part that decides whether the power dispatch automation can work normally or not. So the remote surveillance equipment is supposed to inspect the signal channels real time, but in case of troubles the far terminal and the near terminal could switch synchronously and transfer the condition to the background for repairing the signal channel and remote terminal unit. The condition of monitor system capability has much to do with whether it can check the reason of failure exactly and timely. Consequently, a good monitor system emphasizes on how to shorten the time of overcome troubles and save loss.The system this paper introduced can watch the whole remote channel and remote terminal unit at real time. The more, if there is any problem it...
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