A switching device remote monitoring terminal shared by remote control and remote signaling loops

Abstract

The invention provides a switching device remote monitoring terminal shared by a remote control loop and a remote communication loop. The terminal comprises a remote control unit and a remote communication unit, wherein the remote control unit and the remote communication unit are connected with an operating mechanism of a switching device through the same circuit, when the remote communication unit is in the working state and the remote control unit is not in the working state, a remote communication signal is collected through the circuit, and the state of the switching device is judged according to the remote communication signal; when the remote control unit is in the working state and the remote communication unit is not in the working state, a control signal is transmitted to the operating mechanism through the same circuit, and the switching device is controlled to be switched off or on.

Description

technical field [0001] The invention relates to the technical field of automation control, in particular to a remote monitoring terminal for a switching device shared by remote control and remote signaling circuits. Background technique [0002] At present, the remote monitoring terminal (RTU) has been widely used in the remote monitoring system of switchgear, which basically realizes the automation of control operation and data acquisition. The RTU is connected with the operating mechanism of the switch device, and the remote control switch can be controlled by outputting the remote control signal, and the status information of the switch can be collected in real time, so as to realize the monitoring of the remote switch device. [0003] like figure 1 Shown is a schematic diagram of the wiring between the traditional remote monitoring terminal and the operating mechanism of the switchgear. The traditional RTU remote control and remote signaling loops use separate wiring t...

AI Technical Summary

Problems solved by technology

[0004] 1) The amount of cable laying is large, especially for long-distance switching sites, the cost of materials and the amount of construction work are obviously high;

[0005] 2) The wiring is complicated, and it is difficult for the operation and maintenance personnel to check the wiring and overhaul;

[0006] 3) The remote control and remote signaling flow through a completely isolated circuit. When one of the cables is falsely connected or disconnected, it is easy to cause false alarms in the remote signaling, resulting in a discrepancy between the actual position of the switch device and the position information collected by the RTU;

[0007] 4) The number of cables is too large and the failure rate is high

[0009] 1) The remote control signal needs to be converted in the middle of the relay circuit, and the reliability of signal transmission is greatly reduced;

[0010] 2) The circuit is complicated, and it is difficult to troubleshoot and overhaul;

[0011] 3) There are many components, high failure rate, and high operation and maintenance costs

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