CN219611424U - Control loop of high-voltage circuit breaker - Google Patents

Abstract

The utility model relates to the field of circuit breaker control, in particular to a control loop of a high-voltage circuit breaker, which comprises a control power supply, a closing holding loop, a tripping holding loop, a control switch, an anti-tripping loop and a high-voltage circuit breaker, wherein the high-voltage circuit breaker is provided with a closing coil HQ and a tripping coil TQ, the closing holding loop and the high-voltage circuit breaker HQ are connected in series at two ends of the control power supply, the tripping holding loop and the high-voltage circuit breaker TQ are connected in series at two ends of the control power supply, the control switch and the anti-tripping loop are connected in series at two ends of the control power supply, the control switch is further connected with the tripping loop, and the control loop is also provided with an emergency remote control loop which is connected with field remote control equipment in a communication way. The utility model has the effects of realizing the emergency control of the circuit breaker and reducing accidents and losses.

Description

Control loop of high-voltage circuit breaker

Technical Field

The utility model relates to the field of circuit breaker control, in particular to a control loop of a high-voltage circuit breaker.

Background

In an electric power system, a high-voltage circuit breaker is used as an important device for connecting and disconnecting loads in a transformer substation, and the operation state of the high-voltage circuit breaker plays a critical role in the operation of the transformer substation. The circuit breaker changes the operation mode, and opens and closes the load current, the empty long line or capacitor group and other capacitive load current, and opens and closes the empty transformer or high voltage motor and other inductive small load current equipment. And when the power grid fails, the relay protection device can rapidly cut off the fault from the power grid so as to reduce the damage of the power equipment and improve the stability of the power grid. And the automatic reclosing device is matched with an automatic reclosing device, so that the faults can be timely removed and the power supply can be recovered when the power grid has transient faults, and the reliability of the power supply of the power grid can be improved.

This places higher demands on the operational flexibility of the circuit breaker in different situations. However, in the case of remote operation of the circuit breaker, there is a risk of failure in remote control in an emergency by controlling transmission devices such as a master station front database, an optical cable channel, a longitudinal encryption device, a router, a data exchange, a remote control terminal (RTU), etc.; in addition, when the protection starts the circuit breaker, abnormal conditions such as chain breakage, wire breakage and the like of a front-stage control loop can also cause the risk of failure of the circuit breaker due to protection refusal action because of incorrect setting and CPU halt; when the circuit breaker is operated manually, because primary equipment has risks, in emergency situations, on-site manual operation is generally not performed, and the circuit breaker cannot be operated due to broken wires or broken optical cable chains at the front section of the control loop. To avoid accident and loss enlargement, emergency measures should be taken to shut down the equipment.

Disclosure of Invention

In order to realize emergency control of the circuit breaker and reduce accidents and losses, the utility model provides a control loop of a high-voltage circuit breaker.

The utility model provides a control loop of a high-voltage circuit breaker, which adopts the following technical scheme:

the utility model provides a high-voltage circuit breaker control circuit, includes control power supply, combined floodgate hold loop, tripping hold loop, control switch, anti-tripping circuit and high-voltage circuit breaker, high-voltage circuit breaker has combined floodgate coil HQ and tripping coil TQ, the combined floodgate hold loop is in with high-voltage circuit breaker's HQ series connection is in control power supply's both ends, tripping hold loop is in with high-voltage circuit breaker's TQ series connection is in control power supply's both ends, control switch is in with anti-tripping circuit series connection is in control power supply's both ends, control switch still with tripping hold the loop and link to each other, still include urgent remote control loop, urgent remote control loop is connected with on-the-spot remote control equipment communication.

By adopting the technical scheme, the emergency control loop is arranged in the high-voltage control loop, the communication device which possibly fails to operate can cross the front end, communication is established based on the close end communication and the remote controller switching-on and remote controller switching-off, the switching-on and switching-off of the signal receiving relay is realized, further the remote control of the high-voltage circuit breaker is realized, the emergency control of the circuit breaker is further realized, and accidents and losses are reduced.

Optionally, a remote controller switch-on and a remote controller switch-off are arranged in the emergency remote control loop, the remote controller switch-on is electrically connected with the switch-on coil HQ, and the remote controller switch-off is electrically connected with the switch-off coil TQ.

Through adopting above-mentioned technical scheme, connect the remote controller on the switch-on coil HQ of high voltage circuit breaker and close a floodgate, connect the remote controller brake-separating on the brake-separating coil TQ, and then realize direct remote control remote controller switch-on and remote controller brake-separating, make remote controller switch-on and remote controller brake-separating can control the break-make of high voltage circuit breaker respectively.

Optionally, the remote controller switch-on and remote controller switch-off are both signal receiving relays.

Through adopting above-mentioned technical scheme, based on the signal receiving relay can be used to switch on and break off the circuit, be used for issuing control command and reflect the characteristic that equipment state in order to constitute automatic control and remote control circuit, can send the information command to signal receiving relay remote control, signal receiving relay receives the information command after to high-voltage circuit breaker's closing coil and separating brake coil issue command, and then realize high-voltage circuit breaker's opening and closing.

Optionally, a closing holding relay HBJ and an anti-tripping relay TBJV are arranged in the closing holding loop, and the closing holding relay HBJ and the anti-tripping relay TBJV are sequentially connected in series.

By adopting the technical scheme, when the control switch protection device acts, current flows in the tripping hold loop, a TBJ normally open contact in the anti-tripping loop is closed, if the condition that the closing contact is adhered occurs at this moment, a closing command is always sent out, then the loop of closing contact- & gtTBJV- & gt TBJ is conducted, the anti-tripping voltage relay TBJV can keep voltage self-holding, the self-holding TBJV contact is closed, a TBJV normally closed contact beside the HBJ is opened, the closing hold loop is cut off, and the high-voltage breaker is prevented from jumping. If no opening command exists during the tripping period, after the breaker completes opening, the tripping holding loop is disconnected, the TBJ current coil is deenergized, and at the moment, the TBJV voltage self-holding cannot be formed due to the fact that the closing contact is always disconnected, and the TBJV voltage self-holding is not restored. The TBJV is closed again, and the closing circuit is kept intact, so that the next tripping and closing is not influenced.

Optionally, the control switch comprises manual control, remote control and automatic control of the protection device.

By adopting the technical scheme, the breaker opening and closing operation has three modes of on-site manual operation, remote control and automatic control of the protection device, one mode can be selected to achieve the same purpose, and other functions are not limited due to the fault of the control switch.

Optionally, a post-closing position relay HHJ is also provided in the control loop.

By adopting the technical scheme, the HHJ is used for judging whether normal opening and closing operation or opening and closing operation of the protection device during faults. During normal opening and closing operation, HHJ is strained, and during tripping and closing of the protection action, HHJ is not shifted. The normally open contact of HHJ provides a "total accident" signal for reclosing device use.

Optionally, the protection device automatic control includes protection closing node and protection separating brake node, protection closing node and protection separating brake node all with closing position relay electricity and be connected.

By adopting the technical scheme, the control loop has the functions of distinguishing the action of the protection device and manually operating the circuit breaker, so that a relay after closing is added; when manual (remote control) switching on, the HHJ relay acts, sets '1', and always keeps until switching off; when the hand/tele-break contacts are closed, the HHJ relay returns, sets to "0", and remains unchanged until closing.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. through setting up emergency control circuit in high voltage control circuit, can stride over the communication device of the possible operation failure of front end, establish the communication with remote controller combined floodgate and remote controller separating brake directly based on near-end communication, realize the switching of signal receiving relay, and then realize high voltage circuit breaker remote control, further realize the emergency control of circuit breaker, reduce accident and loss.

2. The remote controller is connected to the switching-on coil HQ of the high-voltage circuit breaker to switch on, and the switching-off coil TQ is connected to the remote controller to switch off, so that the direct remote controller switching-on and the remote controller switching-off are realized, and the switching-on and the switching-off of the high-voltage circuit breaker can be controlled respectively.

3. By arranging the closing holding relay HBJ and the anti-tripping relay TBJV in the closing holding loop, the high-voltage circuit breaker is prevented from 'jumping'.

Drawings

Fig. 1 is a schematic diagram of a control loop of a high voltage circuit breaker.

Fig. 2 is a schematic diagram of a control loop of the high voltage circuit breaker.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-2.

The embodiment of the utility model discloses a control loop of a high-voltage circuit breaker. Referring to fig. 1, a control loop of a high-voltage circuit breaker comprises a control power supply, a closing holding loop, a tripping holding loop, a control switch, an anti-tripping loop and the high-voltage circuit breaker, wherein the high-voltage circuit breaker is provided with a closing coil HQ and a tripping coil TQ of a closing coil, the closing holding loop and the tripping coil HQ of the high-voltage circuit breaker are connected in series at two ends of the control power supply, the tripping holding loop and the high-voltage circuit breaker TQ are connected in series at two ends of the control power supply, the control switch and the anti-tripping loop are connected in series at two ends of the control power supply, the control switch is further connected with the tripping holding loop, and the control loop further comprises an emergency remote control loop which is connected with field remote control equipment in a communication manner.

Referring to fig. 1 and 2, the emergency remote control loop is provided with a remote controller switch-on and a remote controller switch-off, the remote controller switch-on is electrically connected with a switch-on coil HQ, and the remote controller switch-off is electrically connected with a switch-off coil TQ. The remote controller switch-on and remote controller switch-off are both signal receiving relays.

And a closing holding relay HBJ and an anti-tripping relay TBJV are arranged in the closing holding loop and are sequentially connected in series.

The control switch comprises manual control, remote control and automatic control of the protection device. The manual control is provided with a manual joint and a manual joint; the remote control has a remote joint node and a remote sub node.

And a position relay after closing is also arranged in the control loop. The protection device automatic control includes protection switch-on node YHJ and protection separating brake node YTJ, protection switch-on node YHJ and protection separating brake node YTJ all with close back position relay electricity and be connected.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (7)

1. The utility model provides a high-voltage circuit breaker control circuit, includes control power supply, combined floodgate hold loop, tripping hold loop, control switch, anti-tripping circuit and high-voltage circuit breaker, high-voltage circuit breaker has combined floodgate coil HQ and tripping coil TQ, the combined floodgate hold loop is in with high-voltage circuit breaker's HQ series connection is in control power supply's both ends, tripping hold loop is in with high-voltage circuit breaker's TQ series connection is in control power supply's both ends, control switch is in with anti-tripping circuit series connection is in control power supply's both ends, control switch still with tripping hold the loop and link to each other, its characterized in that: the system also comprises an emergency remote control loop which is in communication connection with the field remote control equipment.

2. A high voltage circuit breaker control circuit according to claim 1, wherein: the emergency remote control loop is internally provided with a remote controller switch-on and a remote controller switch-off, the remote controller switch-on is electrically connected with a switch-on coil HQ, and the remote controller switch-off is electrically connected with a switch-off coil TQ.

3. A high voltage circuit breaker control circuit according to claim 2, characterized in that: the remote controller switch-on and remote controller switch-off are both signal receiving relays.

4. A high voltage circuit breaker control circuit according to claim 1, wherein: and a closing holding relay HBJ and an anti-tripping relay TBJV are arranged in the closing holding loop and are sequentially connected in series.

5. A high voltage circuit breaker control circuit according to claim 1, wherein: the control switch comprises manual control, remote control and automatic control of the protection device.

6. A high voltage circuit breaker control circuit according to claim 1, wherein: a post-closing position relay HHHJ is also arranged in the control loop.

7. The high voltage circuit breaker control circuit of claim 5 wherein: the protection device automatic control includes protection switching-on node and protection separating brake node, protection switching-on node and protection separating brake node all with closing position relay electricity and be connected.