An intelligent circuit breaker

Abstract

The utility model discloses an intelligent circuit breaker, include: circuit breaker body, set up in the lower level machine of circuit breaker body and respectively with non -invasive mechanical characteristic sensor, displacement vibration sensor, travel sensor, double confirmation sensor, temperature sensor, spring hold tightly force sensor and monitoring system of communication connection of lower level machine, the lower level machine is used to receive the sensor information of different position of circuit breaker body that different sensor gathers and is transmitted to monitoring system. The utility model discloses through the introduction of various sensors, lower level machine and monitoring system, realize the dynamic perception and evaluation of circuit breaker state, and relevant operating personnel carry out artificial judgment according to the data of monitoring system, improve the perception self -diagnosis preventive maintenance ability of circuit breaker, reduce the probability of unexpected power failure. While improving the reliability, stability and safety of circuit breaker, optimizing operation and maintenance personnel configuration and operation and inspection plan, thereby significantly improve the economy of transformer substation operation.

Description

Technical Field

[0001] This utility model relates to the field of intelligent systems and circuit breaker technology, specifically to an intelligent circuit breaker. Background Technology

[0002] Circuit breakers are critical protection and control devices in power systems, and their reliability directly affects the safe and stable operation of the power grid. Traditional circuit breakers mainly rely on mechanical structures and electromagnetic operations to achieve their opening and closing functions, lacking the ability to perceive and diagnose their own status in real time. Maintenance typically employs periodic inspections and reactive repairs, which are not only inefficient but also fail to prevent sudden failures, easily leading to unplanned outages and increasing maintenance costs and safety risks.

[0003] With the rapid development of smart grids and digital substations, higher requirements are being placed on the intelligence level of circuit breakers. Currently, some circuit breakers on the market have condition monitoring functions, but their sensing methods are mostly intrusive installations, which are complex and costly to retrofit, and the monitoring parameters are relatively simple, failing to achieve comprehensive collection and fusion analysis of multi-dimensional information. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes the following technical solution:

[0005] This utility model provides an intelligent circuit breaker, including: a circuit breaker body, a lower-level machine disposed within the circuit breaker body, and non-intrusive mechanical characteristic sensors, displacement vibration sensors, stroke sensors, dual-confirmation sensors, temperature sensors, spring clamping force sensors, and a monitoring system respectively communicated and connected to the lower-level machine. The lower-level machine is used to receive sensing information from different positions of the circuit breaker body collected by different sensors and transmit it to the monitoring system.

[0006] In one possible implementation, the circuit breaker body is a trolley-type circuit breaker, including a chassis with integrated electric function. The chassis with integrated electric function is equipped with a circuit breaker mechanism box. The circuit breaker mechanism box is equipped with a solid-sealed pole. An arc-extinguishing chamber is provided inside the solid-sealed pole. A conductive arm is provided at the port of the solid-sealed pole. A groove is provided at the front end of the conductive arm. A perforated contact is engaged in the groove of the conductive arm.

[0007] In one possible implementation, the circuit breaker mechanism housing is equipped with a circuit breaker main shaft, on which a non-invasive mechanical characteristic sensor is embedded. The non-invasive mechanical characteristic sensor is electrically connected to a lower-level electromechanical unit to measure the rotation angle of the main shaft.

[0008] In one possible implementation, the displacement vibration sensor is installed inside the circuit breaker mechanism box or on the chassis vehicle with integrated electric function. The displacement vibration sensor is connected to the lower electromechanical unit and is used to measure the opening distance of the moving and stationary contacts in the arc extinguishing chamber inside the solid-sealed pole, the overtravel during closing and opening, the rebound amplitude, the full stroke of the moving contact during closing and opening, and the point of just opening or just closing.

[0009] In one possible implementation, the travel sensor, which is electrically connected to a lower-level electromechanical unit, is mounted on the frame of the circuit breaker body and is used to measure the displacement travel of the circuit breaker.

[0010] In one possible implementation, the dual-confirmation sensor, which is electrically connected to the lower-level electromechanical unit, is mounted on the frame of the circuit breaker body to determine the working position and test position of the chassis vehicle.

[0011] In one possible implementation, the temperature sensor, which is wirelessly radio frequency connected to the lower-level machine, is embedded in the conductive arm or the pentagonal contact to monitor the temperature rise of the circuit breaker conductive arm or the pentagonal contact.

[0012] In one possible implementation, the spring clamping force sensor, which is wirelessly radio frequency connected to the lower-level machine, is disposed on the plum blossom contact and is used to monitor the finger pressure reflecting the clamping force state of the plum blossom contact spring.

[0013] In one possible implementation, the lower-level machine integrates a Hall sensor for monitoring the current of the opening and closing coils, the current of the energy storage motor, and the current of the chassis motor.

[0014] In one possible implementation, the lower-level machine is equipped with an external communication port, and the monitoring system communicates with the external communication port through a shielded cable or a network cable.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention, based on traditional circuit breakers, introduces various sensors, lower-level computers, and monitoring systems to achieve dynamic perception and evaluation of the circuit breaker's status. Relevant operators then make manual judgments based on the data from the monitoring system, enhancing the circuit breaker's self-diagnostic and pre-maintenance capabilities and reducing the probability of unexpected power outages. While improving the reliability, stability, and safety of the circuit breaker, it also optimizes the allocation of maintenance personnel and operation and maintenance plans, thereby significantly improving the economic efficiency of substation operation. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of an intelligent circuit breaker provided for an embodiment of this utility model;

[0018] Figure 2This diagram illustrates the connection relationship between the lower-level machine and various sensors provided in this embodiment of the utility model.

[0019] Figure 1 In the diagram, the symbols are: 1-Circuit breaker body, 2-Circuit breaker mechanism box, 3-Circuit breaker main shaft, 4-Closing coil, 5-Non-intrusive mechanical characteristic sensor, 6-Opening coil, 7-Chassis with integrated electric function, 8-Displacement vibration sensor, 9-Temperature sensor, 10-Spring clamping force sensor, 11-Solid-sealed pole, 12-Conductive arm, 13-Stroke sensor, 14-Arc extinguishing chamber, 15-Lower unit, 16-Double confirmation sensor, 17-Petal contact. Detailed Implementation

[0020] The present solution will now be described in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 A schematic diagram of the structure of an intelligent circuit breaker provided in an embodiment of this utility model is shown below. Figure 1 The intelligent circuit breaker in this embodiment includes: a circuit breaker body 1, a lower-level machine 15 disposed in the circuit breaker body 1, and non-intrusive mechanical characteristic sensors 5, displacement vibration sensors 8, stroke sensors 13, dual confirmation sensors 16, temperature sensors 9, spring clamping force sensors 10 and a monitoring system respectively communicated and connected to the lower-level machine 15. The lower-level machine 15 is used to receive sensing information from different positions of the circuit breaker body 1 collected by different sensors and transmit it to the monitoring system.

[0022] In this embodiment, the circuit breaker body 1 is a trolley-type circuit breaker, including a chassis 7 with integrated electric function. A circuit breaker mechanism box 2 is mounted on the chassis 7. A solid-sealed pole 11 is mounted on the circuit breaker mechanism box 2, and an arc-extinguishing chamber 14 is installed inside the solid-sealed pole 11. A conductive arm 12 is installed at the port of the solid-sealed pole 11, and a groove is provided at the front end of the conductive arm 12. A perforated contact 17 is engaged in the groove of the conductive arm 12. A circuit breaker main shaft 3 is installed inside the circuit breaker mechanism box 2. A non-invasive mechanical characteristic sensor 5 is embedded in the circuit breaker main shaft 3. The non-invasive mechanical characteristic sensor 5 is electrically connected to the lower-level machine 15 via a shielded wire to measure the rotation angle of the main shaft.

[0023] The displacement vibration sensor 8 is installed inside the circuit breaker mechanism box 2 or on the chassis 7 with integrated electric function. The displacement vibration sensor 8 is electrically connected to the lower computer 15 through a shielded wire. It is used to measure the opening distance of the moving and stationary contacts in the arc-extinguishing chamber 14 inside the solid-sealed pole 11, the overtravel during closing and opening, the rebound amplitude, the full stroke of the moving contact during closing and opening, the point of just opening or just closing, and the vibration signal generated.

[0024] A travel sensor 13 is mounted on the frame of the circuit breaker body 1 and electrically connected to the lower-level computer 15 via a shielded wire. It measures the displacement travel of the circuit breaker. A dual-confirmation sensor 16 is mounted on the frame of the circuit breaker body 1 and electrically connected to the lower-level computer 15 via a shielded wire or hardwired connection. It determines the working and testing positions of the chassis vehicle. A temperature sensor 9, wirelessly connected to the lower-level computer 15, is embedded in the conductive arm 12 or the sprite contact 17. It monitors the temperature rise of the conductive arm 12 or the sprite contact 17 and determines whether there are abnormalities such as poor contact. A spring clamping force sensor 10, wirelessly connected to the lower-level computer 15, is mounted on the sprite contact 17. It monitors the contact finger pressure, which reflects the clamping force state of the sprite contact spring.

[0025] In addition, the lower-level computer 15 integrates Hall sensors to monitor the current of the closing and tripping coils, the current of the energy storage motor, and the current of the chassis motor. This provides support for determining whether there are inter-turn short circuits, overvoltage or undervoltage operations, or core jamming in the closing and tripping coils, or whether there is stalling in the energy storage motor or the electric chassis motor. The Hall sensors can also be installed on the control circuits of the closing coil, tripping coil, energy storage motor, and electric chassis motor inside the circuit breaker mechanism box, or on the complete set of equipment outside the circuit breaker body. The lower-level computer 15 is equipped with an external communication port, and the monitoring system communicates with the external communication port through a shielded cable or a network cable. In this embodiment, the monitoring system includes a monitoring host expert diagnostic system and a local human-machine interface.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] The above description is merely a specific embodiment of this utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An intelligent circuit breaker, characterized in that, include: The circuit breaker body includes a lower-level computer installed within the circuit breaker body, and non-intrusive mechanical characteristic sensors, displacement vibration sensors, stroke sensors, dual-confirmation sensors, temperature sensors, spring clamping force sensors, and a monitoring system that are respectively communicated and connected to the lower-level computer. The lower-level computer is used to receive sensing information from different positions of the circuit breaker body collected by different sensors and transmit it to the monitoring system.

2. The intelligent circuit breaker according to claim 1, characterized in that, The circuit breaker body is a handcart-type circuit breaker, including a chassis with integrated electric function. The chassis with integrated electric function is equipped with a circuit breaker mechanism box. The circuit breaker mechanism box is equipped with a solid-sealed pole. An arc-extinguishing chamber is provided inside the solid-sealed pole. A conductive arm is provided at the port of the solid-sealed pole. A groove is provided at the front end of the conductive arm. A plum blossom contact is locked in the groove of the conductive arm.

3. The intelligent circuit breaker according to claim 2, characterized in that, The circuit breaker mechanism box is equipped with a circuit breaker main shaft, and a non-invasive mechanical characteristic sensor is embedded in the circuit breaker main shaft. The non-invasive mechanical characteristic sensor is connected to the lower electromechanical unit and is used to measure the rotation angle of the main shaft.

4. The intelligent circuit breaker according to claim 2, characterized in that, The displacement vibration sensor is installed inside the circuit breaker mechanism box or on the chassis vehicle with integrated electric function. The displacement vibration sensor is connected to the lower electromechanical unit and is used to measure the opening distance of the moving and stationary contacts in the arc extinguishing chamber inside the solid-sealed pole, the overtravel during closing and opening, the rebound amplitude, the full stroke of the moving contact during closing and opening, and the point of just opening or just closing.

5. The intelligent circuit breaker according to claim 1, characterized in that, The travel sensor, which is electrically connected to the lower-level electromechanical unit, is mounted on the frame of the circuit breaker body and is used to measure the displacement travel of the circuit breaker.

6. The intelligent circuit breaker according to claim 1, characterized in that, The dual-confirmation sensor, which is electrically connected to the lower-level electromechanical unit, is mounted on the frame of the circuit breaker body and is used to determine the working position and test position of the chassis vehicle.

7. The intelligent circuit breaker according to claim 2, characterized in that, The temperature sensor, which is wirelessly radio frequency connected to the lower-level machine, is embedded in the conductive arm or the pentagonal contact and is used to monitor the temperature rise of the circuit breaker conductive arm or the pentagonal contact.

8. The intelligent circuit breaker according to claim 2, characterized in that, The spring clamping force sensor, which is wirelessly radio frequency connected to the lower-level machine, is installed on the plum blossom contact and is used to monitor the finger pressure that reflects the clamping force state of the plum blossom contact spring.

9. The intelligent circuit breaker according to claim 1, characterized in that, The lower-level machine integrates Hall sensors to monitor the current of the opening and closing coils, the current of the energy storage motor, and the current of the chassis motor.

10. The intelligent circuit breaker according to claim 1, characterized in that, The lower-level machine is equipped with an external communication port, and the monitoring system communicates with the external communication port through a shielded cable or a network cable.

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