Remote withdrawing and reclosing device

Abstract

The invention discloses a remote withdrawing and reclosing device. The remote withdrawing and reclosing device comprises a lock-up relay and a power module, wherein the power module is used for supplying power, the lock-up relay comprises a normally-closed contact and a normally-open contact which are in linkage, a reclosing and withdrawing hard press plate and the normally-closed contact are connected to a reclosing physical loop led out of a switch protection device in a substation, a withdrawing telecommunication loop led out of a measurement control device of the substation is connected tothe normally-open contact, the normally-open contact is used as a reclosing state feedback end, and a remote control input loop and a remote control exit loop which are led out of the measurement control device of the substation are used as contact conduction state switching loops of the lock-up relay. By remote control, the reclosing physical loop is closed or cut off, meanwhile, a loop state controlled by the device is fed back to a control end in real time, on one hand, reliable change of the reclosing state is achieved, and the working safety is ensured; and on the other hand, remote control is achieved, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a device capable of remotely controlling the reclosing state of a switch in a substation. Background technique [0002] The switch recloser in the substation mainly cooperates with the switch protection action, and it is often necessary to change the input and exit status of the recloser with the arrangement of power work. [0003] At present, the input and exit status of the recloser can be changed mainly through the following two methods. [0004] One is the hard pressing plate method, in which the operator changes the state of the hard pressing plate of the reclosing switch cabinet in the substation to cut off the reclosing control circuit. Since the control circuit is cut off at the physical level, the switch-on and switch-off method of the reclosing switch is more reliable. This method is generally used in actual work, but the disadvantage is that the operation must be carried out on site and cannot be operated remotely. ...

AI Technical Summary

Problems solved by technology

This method can be operated on-site or remotely modified, but because it is aimed at the change of the control word, the physical circuit of the recloser is still closed, so the exit of the recloser is unreliable, and it is difficult to monitor the status of the recloser in real time, causing potential safety hazards. This method is generally not used in actual work

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