1面临的问题目前多数县级无人值守变电站是在原有设备的基础上改造而成的。在改造工作中，需要增加一定的遥信和遥测量，以满足无人值守的要求。但原有RTU容量大多数为64路遥信，32或64路遥测，对于庞大的无人值守站采集量可能显得力不从心。另外，为了使监测信号与遥控信号不 1 Problems At present, most of the county-level unattended substations are based on the original equipment transformed from. In the reconstruction work, we need to increase the number of remote communications and telemetry to meet the unattended requirements. However, most of the original RTU capacity is 64 telemetry, 32 telemetry or 64 telemetry, which may seem powerless for the large collection of unmanned stations. In addition, in order to make the monitoring signal and the remote control signal not