Circuit breaker opening and closing monitoring system and monitoring method

Abstract

The invention discloses a circuit breaker opening and closing monitoring system and monitoring method, and relates to the technical field of power system relay protection, and the system comprises a closing unit, an opening unit and a monitoring unit. The closing unit comprises a re-closing monitoring loop which is used for monitoring the conduction state of the circuit when the circuit breaker is closed next time in the closing state. The opening unit comprises a re-opening monitoring loop which is used for monitoring the conduction state of the circuit when the circuit breaker is opened next time in the opening state. The monitoring unit comprises a re-closing signal loop and a re-opening signal loop which respectively take the normally closed contacts of the corresponding relays as cores and convert the abnormal states of the loops into alarm signals sent to the background. The monitoring system realizes real-time and comprehensive monitoring of the integrity of the circuit breaker loop, and improves the absolute reliability of the action of the circuit breaker.

Description

Technical Field

[0001] This invention generally relates to the field of power system relay protection technology, and specifically to a circuit breaker opening and closing monitoring system and monitoring method. Background Technology

[0002] Circuit breakers are critical devices in power systems used to connect and disconnect circuits and protect electrical equipment. The reliability of their control circuits directly determines whether the circuit breaker can correctly perform opening or closing operations, thus affecting the safe and stable operation of the entire power system. Currently, the integrity of the circuit breaker's opening and closing circuits is generally monitored by using a trip monitoring circuit connected in series in the closing circuit to monitor the integrity of the closing circuit when the circuit breaker is in the open state; and by using a closing monitoring circuit connected in series in the opening circuit to monitor the integrity of the opening circuit when the circuit breaker is in the closed state.

[0003] However, this traditional monitoring method has inherent blind spots. It can only guarantee the circuit breaker's ability to perform one closing or opening operation under its current state. If there is a latent defect in the closing circuit, the automatic reclosing will fail due to the abnormal closing circuit after a momentary fault protection trip, leading to a power outage. Similarly, if there is a latent defect in the opening circuit, the protection device will be unable to trip when the circuit breaker closes to the faulty line due to the abnormal opening circuit, potentially causing the fault to escalate and triggering a cascading trip accident. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a circuit breaker opening and closing monitoring system and monitoring method.

[0005] In a first aspect, the present invention provides a circuit breaker opening and closing monitoring system, comprising: The closing unit includes: a common closing circuit and a reclosing monitoring circuit connected in series therewith; The reclosing monitoring circuit includes: a first switch and a reclosing relay connected together, wherein the first switch is configured to close when the circuit breaker is in the closed state; the reclosing relay is energized when the common closing circuit is open, and its normally closed contact is open; the reclosing monitoring circuit is used to monitor the continuity of the circuit when the circuit breaker is closed and the circuit is closed again. The tripping unit includes: a common tripping circuit and a re-tripping monitoring circuit connected in series therewith; The re-opening monitoring circuit includes: a second switch and a re-opening relay connected together, the second switch being configured to close when the circuit breaker is in the open state; the re-opening relay being energized when the common circuit of the open state is complete, and its normally closed contact being open; the re-opening monitoring circuit is used to monitor the conduction status of the circuit when the circuit breaker in the open state is opened again. The monitoring unit includes a re-closing signal circuit and a re-disconnecting signal circuit. The common signal terminal of the re-closing signal circuit is connected to the monitoring system backend via at least the normally closed contact of the re-closing relay and the normally closed contact of the first auxiliary switch. The common signal terminal of the re-disconnecting signal circuit is connected to the monitoring system backend via at least the normally closed contact of the re-disconnecting relay and the normally closed contact of the second auxiliary switch.

[0006] According to the technical solution provided by the present invention, the closing common circuit includes: a closing coil connected to the negative power supply terminal, an energy storage switch, a normally closed contact of a first low-pressure blocking relay, and a normally closed contact of an anti-pumping relay; wherein, one end of the normally closed contact of the anti-pumping relay is connected to the normally closed contact of the first low-pressure blocking relay, and the other end is connected to the first switch.

[0007] According to the technical solution provided by the present invention, the tripping common circuit includes: a tripping coil connected to the negative power supply terminal and a normally closed contact of a second low-pressure blocking relay; wherein, the other end of the normally closed contact of the second low-pressure blocking relay is connected to the second switch.

[0008] According to the technical solution provided by the present invention, the reconnection monitoring circuit further includes: a first matching resistor connected to the reconnection relay, the other end of the first matching resistor being connected to the positive power supply terminal; The re-division monitoring circuit further includes a second matching resistor connected to the re-division relay, the other end of which is connected to the positive power supply terminal.

[0009] According to the technical solution provided by the present invention, the closing unit further includes: a false alarm prevention circuit; The false alarm prevention circuit is connected in parallel with the closing common circuit and the reclosing monitoring circuit. The false alarm prevention circuit includes: a third switch and a time relay connected between the positive power supply terminal and the negative power supply terminal; when the time relay is energized, its own delayed normally open contact is opened. The common terminal of the reclosing signal circuit is connected to the monitoring system backend via the normally closed contact of the reclosing relay, the normally closed contact of the first auxiliary switch, and the delayed normally open contact of the time relay. The operating duration of the time relay is greater than the switching time of the energy storage switch.

[0010] According to the technical solution provided by the present invention, the closing unit further includes: a trip monitoring circuit, which is connected in parallel with the reclosing monitoring circuit and connected in series with the closing common circuit; the trip monitoring circuit includes: a fourth switch and a trip relay connected together, and the trip monitoring circuit is used to monitor the conduction state of the circuit when the circuit breaker is closed again in the open state; The tripping unit further includes: a closing position monitoring circuit; the closing position monitoring circuit is connected in parallel with the re-tripping monitoring circuit and connected in series with the tripping common circuit; the closing position monitoring circuit includes: a connected fifth switch and a closing position relay, and the closing position monitoring circuit is used to monitor the conduction status of the circuit when the circuit breaker trips again in the closed state. The monitoring unit further includes a control disconnection monitoring circuit, wherein the common signal terminal of the control disconnection monitoring circuit is connected to the monitoring system backend via the normally closed contact of the trip relay and the normally closed contact of the close relay.

[0011] Secondly, the present invention provides a circuit breaker opening and closing monitoring method, applied to the aforementioned circuit breaker opening and closing monitoring system, the circuit breaker opening and closing monitoring system comprising: a closing unit and an opening unit; wherein, the closing unit comprises: a closing common circuit and a reclosing monitoring circuit and a tripping monitoring circuit connected in series therewith; the opening unit comprises: an opening common circuit and a re-opening monitoring circuit and a closing position monitoring circuit connected in series therewith; the method comprises: Responding to the circuit breaker closing command; The first switch in the reclosing monitoring circuit is closed, the fifth switch in the closing position monitoring circuit is closed, and the energy storage switch in the closing common circuit is closed simultaneously. If the reclosing monitoring circuit is connected, the reclosing relay is energized, and the reclosing signal circuit is not connected, so as not to trigger the reclosing alarm signal in the background of the monitoring system, in order to confirm that the circuit breaker is normal for the next closing. If the closing position monitoring circuit is connected, the closing position relay is energized. If the closing position monitoring circuit is not connected, the control circuit disconnection signal in the monitoring system background is not triggered to confirm that the circuit breaker will open normally the next time.

[0012] According to the technical solution provided by the present invention, the method further includes: In response to the circuit breaker tripping command; Control the closing of the second switch in the re-division monitoring circuit, and control the closing of the fourth switch in the trip monitoring circuit; If the re-disconnection monitoring circuit is connected, the re-disconnection relay is energized, and the re-disconnection signal circuit is not connected, so as not to trigger the re-disconnection alarm signal in the monitoring system background, in order to confirm that the circuit breaker will disconnect normally the next time. If the trip monitoring circuit is connected, the trip relay is energized; if the trip monitoring circuit is not connected, the control circuit disconnection signal in the monitoring system background is not triggered to confirm that the circuit breaker will close normally the next time.

[0013] In summary, this technical solution specifically discloses a circuit breaker closing and opening monitoring system and method. The monitoring system includes a closing unit, an opening unit, and a monitoring unit. The closing unit includes a common closing circuit and a reclosing monitoring circuit connected in series with it. The reclosing monitoring circuit includes a first switch and a reclosing relay connected in series, wherein the first switch is configured to close when the circuit breaker is in the closed state; the reclosing relay is energized when the common closing circuit is conducting, and its normally closed contact opens; the reclosing monitoring circuit is used to monitor the circuit continuity of the circuit breaker in the closed state during the next closing. The opening unit includes a common opening circuit and a reclosing monitoring circuit connected in series with it; the reclosing monitoring circuit includes a second switch and a reclosing relay connected in series, wherein the second switch is configured to... The circuit breaker closes when it is in the open state; the re-opening relay is energized when the common circuit of the opening is complete, and its normally closed contact opens; the re-opening monitoring circuit is used to monitor the conduction status of the circuit when the circuit breaker in the open state opens again; the monitoring unit includes a reclosing signal circuit and a re-opening signal circuit. The common signal terminal of the reclosing signal circuit is connected to the monitoring system backend at least through the normally closed contact of the reclosing relay and the normally closed contact of the first auxiliary switch; the common signal terminal of the re-opening signal circuit is connected to the monitoring system backend at least through the normally closed contact of the re-opening relay and the normally closed contact of the second auxiliary switch.

[0014] Beneficial effects: This invention achieves comprehensive monitoring of the integrity of the circuit breaker's opening and closing circuits, ensuring the absolute reliability of a complete operation sequence. Simultaneously, by monitoring the closing circuit in real time during the closing state, it can provide early warnings and prevent reclosing failures, as well as effectively prevent cascading trips caused by failure to operate during faults. Furthermore, the system circuit design of this invention can seamlessly integrate with existing circuit breaker control circuits, achieving functional upgrades without altering the original protection logic and circuit breaker body. This results in low modification costs and suitability for widespread substation upgrades and applications. Attached Figure Description

[0015] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the closing unit and the opening unit in a circuit breaker closing and opening monitoring system.

[0016] Figure 2 This is a schematic diagram of the structure of a monitoring unit in a circuit breaker opening and closing monitoring system.

[0017] Figure 3 This is a schematic diagram of the closing unit.

[0018] Figure 4 This is a schematic diagram of the trip unit.

[0019] Figure 5This is a flowchart illustrating the closed state in a circuit breaker opening and closing detection method.

[0020] Figure 6 This is a flowchart illustrating the open state in a circuit breaker opening and closing detection method.

[0021] The diagram is labeled as follows: 1. Closing unit; 2. First switch; 3. Reclosing relay; 4. Opening unit; 5. Second switch; 6. Reopening relay; 7. Reclosing signal circuit; 8. Reopening signal circuit; 9. First auxiliary switch; 10. Second auxiliary switch; 11. Closing common circuit; 12. Reclosing monitoring circuit; 13. Closing coil; 14. Energy storage switch; 15. Normally closed contact of the first low-pressure interlocking relay; 16. Normally closed contact of the anti-pumping relay; 17. Trip coil; 18. Normally closed contact of the second low-pressure interlocking relay; 19. First matching resistor; 20. Second matching resistor; 21. False alarm prevention circuit; 22. Time relay; 23. Third switch; 24. Trip position monitoring circuit; 25. Fourth switch; 26. Trip position relay; 27. Closing position monitoring circuit; 28. Fifth switch; 29. ​​Closing position relay; 30. Control line disconnection monitoring circuit; 41. Opening common circuit; 42. Reopening monitoring circuit. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example 1 To make the technical solutions of the embodiments of the present invention clearer and easier to understand, the application background of the embodiments of the present invention will be introduced below.

[0025] The circuit breaker's opening and closing circuit is the core component controlling its operation, and its working status directly affects the circuit breaker's operational reliability. Real-time monitoring of the circuit breaker's opening and closing circuit integrity allows for accurate monitoring of the circuit breaker's status and timely early warning in abnormal situations, preventing the escalation of accidents. Currently, existing methods for monitoring the integrity of the circuit breaker's opening and closing circuit primarily employ a series connection of the normally closed contacts of a trip position monitoring relay and a close position monitoring relay. When the circuit breaker is in the closed position, if the trip circuit is intact, the close position monitoring relay connected in series in the trip circuit is energized, opening its normally closed contact and preventing the issuance of a control circuit disconnection signal. Conversely, when the circuit breaker is in the open position, if the closing circuit is intact, the trip position monitoring relay connected in series in the closing circuit is energized, opening its normally closed contact and preventing the issuance of a control circuit disconnection signal.

[0026] Under existing monitoring methods, when the circuit breaker is in the closed position, a transient ground fault in the line may cause the protection system to trip the circuit breaker. However, since the integrity of the closing circuit was not confirmed before the trip, there is a risk of reclosing failure. When the circuit breaker is in the open position, maintenance personnel may close the circuit breaker during a switching operation. If a ground fault exists in the line at this time, the integrity of the opening circuit was not confirmed before the trip, leading to a risk of tripping failure and cascading tripping. Therefore, existing monitoring methods can only monitor the integrity of the opening circuit in the closed state and the closing circuit in the open state, thus ensuring the opening operation in the closed state and the closing operation in the open state. However, they cannot guarantee the next closing operation in the closed state or the next opening operation in the open state.

[0027] In view of this, the present invention proposes a circuit breaker opening and closing monitoring system, comprising: a closing unit 1, a opening unit 4, and a monitoring unit; the closing unit 1 includes: a closing common circuit 11 and a reclosing monitoring circuit 12 connected in series therewith; the reclosing monitoring circuit 12 includes: a first switch 2 and a reclosing relay 3 connected in series, wherein the first switch 2 is configured to close when the circuit breaker is in the closed state; the reclosing relay 3 is energized when the closing common circuit 11 is conducting, and its normally closed contact is open; the reclosing monitoring circuit 12 is used to monitor the conduction state of the circuit when the circuit breaker in the closed state is closed for the next closing; the opening unit 4 includes: a opening common circuit 41 and a reclosing monitoring circuit 42 connected in series therewith; the reclosing monitoring circuit 42 returns to the circuit breaker in the closed state. The circuit includes: a connected second switch 5 and a re-opening relay 6. The second switch 5 is configured to close when the circuit breaker is in the open state. The re-opening relay 6 is energized when the common circuit 41 of the open circuit is complete, and its normally closed contact is open. The re-opening monitoring circuit 42 is used to monitor the conduction status of the circuit when the circuit breaker in the open state is opened again. The monitoring unit includes a reclosing signal circuit 7 and a re-opening signal circuit 8. The common signal terminal of the reclosing signal circuit 7 is connected to the monitoring system backend through at least the normally closed contact of the reclosing relay 3 and the normally closed contact of the first auxiliary switch 9. The common signal terminal of the re-opening signal circuit 8 is connected to the monitoring system backend through at least the normally closed contact of the re-opening relay 6 and the normally closed contact of the second auxiliary switch 10.

[0028] As can be seen, this invention, based on traditional monitoring methods, adds monitoring functionality under the same state circuit, specifically monitoring the conduction state of the circuit when the circuit breaker in the open state is about to open again, and vice versa. This achieves comprehensive monitoring of the integrity of the circuit breaker's opening and closing circuits, ensuring the absolute reliability of a complete operation sequence. Simultaneously, by monitoring the closing circuit in the closing state in real time, it can provide early warnings and prevent reclosing failures, as well as effectively prevent cascading trips caused by failure to operate during faults. Furthermore, the circuit design of this invention does not involve large-scale modifications to traditional monitoring circuits and can seamlessly integrate with existing circuit breaker control circuits. Without changing the original protection logic and the circuit breaker itself, functional upgrades can be achieved simply by adding conventional electrical components, resulting in low modification costs and applicability to widespread substation upgrades and applications.

[0029] For details, please refer to Figures 1-4 As shown, this embodiment of the invention provides a circuit breaker opening and closing monitoring system, which includes: Closing unit 1 includes: a common closing circuit 11 and a reclosing monitoring circuit 12 connected in series therewith; The reclosing monitoring circuit 12 includes: a first switch 2 and a reclosing relay 3 connected together, wherein the first switch 2 is configured to close when the circuit breaker is in the closed state; the reclosing relay 3 is energized when the closing common circuit 11 is open, and its normally closed contact is open; the reclosing monitoring circuit 12 is used to monitor the circuit continuity status of the circuit breaker in the closed state when it is closed again. The tripping unit 4 includes: a tripping common circuit 41 and a re-tripping monitoring circuit 42 connected in series therewith; The re-opening monitoring circuit 42 includes: a connected second switch 5 and a re-opening relay 6. The second switch 5 is configured to close when the circuit breaker is in the open state; the re-opening relay 6 is energized when the common circuit 41 of the circuit breaker is complete, and its normally closed contact is open; the re-opening monitoring circuit 42 is used to monitor the conduction status of the circuit when the circuit breaker in the open state is opened again. The monitoring unit includes a re-closing signal circuit 7 and a re-disconnecting signal circuit 8. The common signal terminal of the re-closing signal circuit 7 is connected to the monitoring system backend via at least the normally closed contact a of the re-closing relay 3 and the normally closed contact of the first auxiliary switch 9. The common signal terminal of the re-disconnecting signal circuit 8 is connected to the monitoring system backend via at least the normally closed contact b of the re-disconnecting relay 6 and the normally closed contact of the second auxiliary switch 10.

[0030] In this embodiment of the invention, the core architecture of the circuit breaker opening and closing monitoring system is mainly described above. This architecture is creatively divided into three functional units: a reclosing monitoring circuit 12, a re-opening monitoring circuit 42, a reclosing signal circuit 7, and a re-opening signal circuit 8, all working in concert. Unlike traditional cross-state monitoring (opening after closing, or closing after opening) methods, this invention proposes a same-state, same-direction monitoring structure: the reclosing monitoring circuit 12 monitors the conduction state of the circuit when the circuit breaker in the closed state is closed, and the re-opening monitoring circuit 42 monitors the conduction state of the circuit when the circuit breaker in the open state is opened, thus achieving comprehensive monitoring of the integrity of the circuit breaker opening and closing circuits and ensuring the absolute reliability of a complete operation sequence.

[0031] The closing unit 1 connects the reclosing monitoring circuit 12 with the closing common circuit 11. The reclosing monitoring circuit 12 includes a first switch 2 and a reclosing relay 3. The logic of the reclosing monitoring circuit 12 is set as follows: when the circuit breaker is in the closed state, the first switch 2 is closed. Since the closing common circuit 11 and the reclosing monitoring circuit 12 are connected in series between the positive power supply terminal and the negative power supply terminal, if the closing common circuit 11 is turned on, the reclosing relay 3 is energized. At the same time, the direct action of the reclosing relay 3 being energized is that its normally closed contact opens.

[0032] The core of the tripping unit 4 is to associate the re-tripping monitoring circuit 42 with the tripping common circuit 41. The re-tripping monitoring circuit 42 includes the second switch 5 and the re-tripping relay 6. In the re-tripping monitoring circuit 42, the logic is set as follows: when the circuit breaker is in the tripped state, the second switch 5 is closed. Since the tripping monitoring circuit 42 and the tripping common circuit 41 are connected in series between the positive power supply terminal and the negative power supply terminal, if the tripping common circuit 41 is turned on, the re-tripping relay 6 is energized. At the same time, the direct action of the re-closing relay 3 being energized is that its normally closed contact opens.

[0033] Based on the above-mentioned setting logic of closing unit 1 and opening unit 4, the monitoring unit includes a reclosing signal circuit 7 associated with reclosing monitoring circuit 12 and a re-opening signal circuit 8 associated with re-opening monitoring circuit 42. At the same time, reclosing signal circuit 7 and re-opening signal circuit 8 are also the output channels of the monitoring results of these two circuits, which need to be connected to the monitoring system backend. Reclosing signal circuit 7 and the first auxiliary switch 9 and the second auxiliary switch 10 in re-opening monitoring circuit 42 will enter the closed state when the corresponding circuit is monitored. The normally closed contact of reclosing relay 3 and the normally closed contact of re-opening relay 6 are the dominant factors for the conduction state of reclosing signal circuit 7 and re-opening signal circuit 8.

[0034] Specifically, the common terminal of the reclosing signal circuit 7 passes through at least the normally closed contact of the reclosing relay 3 and the normally closed contact of the first auxiliary switch 9. If the monitored reclosing monitoring circuit 12 and the closing common circuit 11 are intact, the reclosing relay 3 is energized, its normally closed contact opens, and the reclosing signal circuit 7 is disconnected. The reclosing signal circuit 7 will not issue an alarm signal; otherwise, it will issue an alarm signal. Similarly, the common terminal of the re-opening signal circuit 8 passes through at least the normally closed contact of the re-opening relay 6 and the normally closed contact of the second auxiliary switch 10. If the monitored re-opening monitoring circuit 42 and the opening common circuit 41 are intact, the re-opening relay 6 is energized, its normally closed contact opens, and the re-opening signal circuit 8 is disconnected. The re-opening signal circuit 8 will not issue an alarm signal; otherwise, it will issue an alarm signal.

[0035] In a preferred embodiment, see Figure 1 and Figure 3 The closing common circuit 11 includes: a closing coil 13 connected to the negative power supply terminal, an energy storage switch 14, a normally closed contact 15 of the first low-pressure lockout relay, and a normally closed contact 16 of the anti-pump relay; wherein, one end of the normally closed contact 16 of the anti-pump relay is connected to the normally closed contact 15 of the first low-pressure lockout relay, and the other end is connected to the first switch 2.

[0036] Specifically, in this embodiment of the invention, the specific components of the closing common circuit 11 and their series sequence are as follows: normally closed contact 16 of the anti-pumping relay, normally closed contact 15 of the first low-pressure lockout relay, energy storage switch 14, and closing coil 13, and then the closing coil 13 is connected to the negative power supply terminal -110V; this path is the main current path that must be conducted to perform a successful closing operation. Before connecting the first switch 2 to the normally closed contact 16 of the anti-pumping relay, the reclosing monitoring circuit 12 can directly monitor this critical path by bypassing the first switch 2.

[0037] Meanwhile, if there is a break in the closing common circuit 11, such as damage to the normally closed contact 16 of the anti-pumping relay, damage to the normally closed contact 15 of the first low gas pressure lockout relay, failure of the energy storage switch 14 to store energy, or burnout of the closing coil 13, the reclosing monitoring circuit 12 will not be connected when the circuit breaker is in the closed state, and the reclosing relay 3 will not be energized, thus forming a homomorphic monitoring of the circuit conduction status of the closing unit 1 when the circuit breaker is closed in the next closing state.

[0038] In a preferred embodiment, see Figure 1 and Figure 4 The tripping common circuit 41 includes: a tripping coil 17 connected in sequence to the negative power supply terminal and a normally closed contact 18 of the second low-pressure lockout relay; wherein, the other end of the normally closed contact 18 of the second low-pressure lockout relay is connected to the second switch 5.

[0039] Specifically, in this embodiment of the invention, the specific components of the tripping common circuit 41 and their series sequence are as follows: the normally closed contact 18 of the second low-pressure interlocking relay, the trip coil 17, the normally closed contact 18 of the second low-pressure interlocking relay is connected to the re-tripping monitoring circuit 42, and the trip coil 17 is connected to the negative power supply terminal -110V; this is the core path for performing the tripping operation. Similarly, through the design of the connection method, the re-tripping monitoring circuit 42 can effectively monitor this path. If there is a break in the tripping common circuit 41, the normally closed contact 18 of the second low-pressure interlocking relay is damaged, and the trip coil 17 is burned out. At this time, the re-tripping monitoring circuit 42 will not be connected when the circuit breaker is in the tripping state, and the re-tripping relay 6 will not be energized, thus forming a homomorphic monitoring of the circuit conduction state of the tripping unit 4 when it trips again in the tripping state of the circuit breaker.

[0040] It should be noted that the normally closed contact 16 of the anti-pump relay is used to prevent the circuit breaker from experiencing a "close-open-close" jumping phenomenon during a fault, thus protecting the equipment; the normally closed contact 15 of the first low-pressure interlocking relay and the normally closed contact 18 of the second low-pressure interlocking relay are both used to disconnect when the pressure of the operating mechanism is too low, thereby interlocking the operation and preventing damage to the equipment under adverse conditions; the energy storage switch 14 is a mechanical interlock, which only closes after the operating mechanism has completed energy storage, ensuring that there is enough energy to complete the closing; the closing coil 13 is the electromagnetic element that ultimately executes the closing command, and the trip coil 17 is the electromagnetic element that ultimately executes the opening command.

[0041] In a preferred embodiment, Figure 3 and Figure 4 The reconnection monitoring circuit 12 also includes: a first matching resistor 19 connected to the reconnection relay 3, the other end of which is connected to the positive power supply terminal; The re-distribution monitoring circuit 42 also includes a second matching resistor 20 connected to the re-distribution relay 6, with the other end of the second matching resistor 20 connected to the positive power supply terminal.

[0042] Specifically, the function of the first matching resistor 19 and the second matching resistor 20 is to eliminate the possibility of the circuit breaker being erroneously opened or closed due to the monitoring behavior itself; their values ​​must meet the following conditions, and the first matching resistor 19 must meet the following formula (1): Formula (1); in, This refers to the total current flowing through the monitoring circuit 12 when the circuit breaker is in the closed state and the reclosing monitoring circuit 12 is turned on. The resistor is the first matching resistor 19; The resistor for reclosing relay 3; The resistance of the closing coil 13; The rated current is set for the first matching resistor 19; U This is the voltage value, which can be 220.

[0043] As can be seen, due to the presence of the first matching resistor 19, the current of the reclosing monitoring circuit 12 is much smaller than the minimum operating current of the closing coil 13 (less than 30% of the rated current), ensuring that the closing coil 13 will not malfunction.

[0044] Furthermore, the second matching resistor 20 must satisfy the following formula (2): Formula (2); in, This refers to the total current flowing through the monitoring circuit 42 when the circuit breaker is in the open state and the monitoring circuit 42 is turned on. The resistor is the second matching resistor 20; The resistor for the re-distribution relay 6; The resistance of trip coil 17; The rated current is set for the second matching resistor 20; U This is the voltage value, which can be 220.

[0045] As can be seen, due to the presence of the matching resistor RZTJ, the circuit current is much smaller than the minimum operating current of the trip coil 17 (less than 30% of the rated current), ensuring that the trip coil 17 will not malfunction.

[0046] Thus, according to the connection sequence from the positive power supply terminal to the negative power supply terminal, the closing common circuit 11 and the reclosing monitoring circuit 12 connected in series with it are as follows: positive power supply terminal +110V, first matching resistor 19, reclosing relay 3, first switch 2, anti-pumping relay normally closed contact 16, first low gas pressure lockout relay normally closed contact 15, energy storage switch 14, closing coil 13 and negative power supply terminal -110V.

[0047] Meanwhile, the connection sequence of the tripping common circuit 41 and the re-tripping monitoring circuit 42 connected in series with it, from the positive power supply terminal to the negative power supply terminal, is as follows: positive power supply terminal +110V, second matching resistor 20, normally closed contact 18 of the second low gas pressure blocking relay, tripping coil 17, and negative power supply terminal -110V.

[0048] In a preferred embodiment, see Figure 3 The closing unit 1 also includes: a false alarm prevention circuit 21; The false alarm prevention circuit 21 is set in parallel with the closing common circuit 11 and the reclosing monitoring circuit 12. The false alarm prevention circuit 21 includes: a third switch 23 and a time relay 22 connected between the positive power supply terminal and the negative power supply terminal; when the time relay 22 is energized, its own delayed normally open contact is opened. The common terminal of the reclosing signal circuit 7 is connected to the monitoring system backend via the normally closed contact a of the reclosing relay 3, the normally closed contact of the first auxiliary switch 9, and the delayed normally open contact e of the time relay 22. The operating duration of the time relay 22 is longer than the switching duration of the energy storage switch 14.

[0049] Considering that the energy storage mechanism needs time to recharge after the circuit breaker is closed, the energy storage switch 14 is disconnected, the reclosing monitoring circuit 12 is not conductive, and the reclosing relay 3 is de-energized. If this is determined immediately, a false alarm of a closing circuit fault will occur. Therefore, the closing unit 1 also includes a false alarm prevention circuit 21. The false alarm prevention circuit 21 is set by a time relay 22. The existence of the delayed normally closed contact of the time relay 22 can effectively avoid false alarms due to the circuit breaker mechanism not charging in time during the initial closing phase.

[0050] Specifically, the anti-mis-alarm circuit 21 is arranged in parallel with the closing common circuit 11 and the reclosing monitoring circuit 12, that is, both ends of the anti-mis-alarm circuit 21 are directly connected between the negative power supply terminal -110V and the positive power supply terminal +110V; the anti-mis-alarm circuit 21 includes: a third switch 23 and a time relay 22; its setting logic is: at the initial stage when the circuit breaker is in the closing state (when switching from off to on), the third switch 23 is closed, the time relay 22 is powered on, and after a certain delay T1 (the action duration of the time relay 22), its delayed closing contact is closed; assuming that the closing spring energy is released and the circuit breaker starts energy storage, after a certain time T2 (since the energy storage switch 14 will only switch its state after the energy storage mechanism completes energy storage in a certain time, so T2 here can be either the switching duration of the energy storage switch 14 or understood as the energy storage duration of the energy storage mechanism), the energy storage is completed and the energy storage switch 14 is closed. At this time, the closing common circuit 11 is turned on, the reclosing relay 3 is powered on, and the normally closed contact of the reclosing relay 3 is disconnected. Since in the present invention, T1>T2 is set, before the energy storage of the energy storage switch 14 is completed, the normally closed contact of the reclosing relay 3 is closed, while the delayed closing contact of the time relay 22 is open, so that the reclosing signal circuit 7 is also not turned on, and the monitoring system background cannot send out a warning signal for reclosing again. If T1<T2 or the time relay is not provided, before the energy storage of the energy storage switch 14 is completed, the monitoring system background will send out a warning signal for reclosing again, and the signal disappears after a certain time T2, which belongs to mis-alarm. Therefore, the existence of the delayed closing contact of the time relay 22 can effectively avoid the situation of mis-alarm caused by the circuit breaker mechanism not storing energy in time at the initial stage of closing.

[0051] It can be seen that the setting of the anti-mis-alarm circuit 21 effectively avoids the vast majority of invalid alarms caused by the normal operation sequence, making the warning signals received by the monitoring system background highly credible, greatly reducing the ineffective troubleshooting work of the operation and maintenance personnel, and improving the practical value of the system.

[0052] In a preferred embodiment, referring to Figures 1-4 , the closing unit 1 further includes: a trip position monitoring circuit 24, the trip position monitoring circuit 24 is arranged in parallel with the reclosing monitoring circuit 12 and is arranged in series with the closing common circuit 11; the trip position monitoring circuit 24 includes: a fourth switch 25 and a trip position relay 26 connected in series, and the trip position monitoring circuit 24 is used to monitor the conduction state of the circuit when the circuit breaker is in the trip state and makes the next closing. The tripping unit 4 further includes: a closing position monitoring circuit 27; the closing position monitoring circuit 27 is arranged in parallel with the re-tripping monitoring circuit 42 and is arranged in series with the tripping common circuit 41; the closing position monitoring circuit 27 includes: a fifth switch 28 and a closing position relay 29 connected in series, and the closing position monitoring circuit 27 is used to monitor the conduction state of the circuit when the circuit breaker is in the closing state and makes the next tripping. The monitoring unit also includes a control circuit 30 for disconnection monitoring. The common signal terminal of the control circuit 30 is connected to the monitoring system backend via the normally closed contact c of the jump relay 26 and the normally closed contact d of the close relay 29.

[0053] Specifically, the opening and closing monitoring system of the present invention also integrates traditional functions: the closing common circuit 11 is a part that is connected to the reclosing monitoring circuit 12 and the trip monitoring circuit 24. Therefore, the trip monitoring circuit 24 is connected in parallel with the reclosing monitoring circuit 12, and the trip monitoring circuit 24 is used to realize the traditional function of monitoring the closing circuit in the opening state.

[0054] The setting logic of the trip monitoring circuit 24 is as follows: When the circuit breaker is in the open state, the fourth switch 25 is closed, and at the same time, the normally open contact of the energy storage switch 14 is closed after energy storage, so that the trip relay 26 is energized. The normally closed contact of the trip relay 26 in the control disconnection monitoring circuit 30 is opened. At this time, the control disconnection monitoring circuit 30 will not issue a control circuit disconnection signal. Conversely, it will issue a control circuit disconnection signal, thereby realizing the monitoring of the integrity of the closing circuit in the open state.

[0055] Similarly, the setting logic of the closing position monitoring circuit 27 is as follows: when the circuit breaker is in the closed state, the fifth switch 28 is closed, which energizes the closing position relay 29. This opens the normally closed contact of the closing position relay 29 in the control disconnection monitoring circuit 30, preventing the control disconnection monitoring circuit 30 from issuing a control circuit disconnection signal. Conversely, it issues a control circuit disconnection signal, thereby realizing the monitoring of the integrity of the closing circuit in the open state.

[0056] It should be noted that, since the signal common terminal of the control disconnection monitoring circuit 30 passes through the normally closed contact of the trip relay 26 and the normally closed contact of the closing relay 29, when monitoring the integrity of the closing circuit in the open state, the normally closed contact of the closing relay 29, which is not involved, is in the conducting state; at the same time, when monitoring the integrity of the closing circuit in the open state, the normally closed contact of the trip relay 26, which is not involved, is in the conducting state when it is open.

[0057] In addition, both the jump position monitoring circuit 24 and the close position monitoring circuit 27 are equipped with corresponding matching resistors (such as...). Figure 1 For the connection locations of RTWJ and RHWJ marked in the image, please refer to [link / reference]. Figure 1 Furthermore, the trip monitoring circuit 24 has an anti-pumping relay normally closed contact FTJ between the fourth switch 25 and the trip relay 26, which will not be described in detail here. Without a matching resistor, when the corresponding circuit is turned on, a current on the order of magnitude of the operation time will flow through the closing or opening coil, posing a serious risk of accidentally triggering the circuit breaker when it should not operate (such as during normal monitoring). After adding the matching resistor, the monitoring current is limited to below the safety threshold, achieving the purpose of monitoring only and not triggering.

[0058] Therefore, the internal circuits of the circuit breaker opening and closing monitoring system proposed in this invention form a complete and comprehensive circuit breaker monitoring system. Based on the addition of a reclosing monitoring circuit 12 and a re-opening monitoring circuit 42, the overall closing unit 1 and opening unit 4 are structurally improved, enabling the closing unit 1 to handle both reclosing and tripping monitoring, and enabling the opening unit 4 to handle both re-opening and closing monitoring, together forming a comprehensive monitoring network. Simultaneously, the monitoring units have also been specifically improved, allowing the reclosing signal circuit 7 and the re-opening signal circuit 8 to accurately output the reclosing and re-opening monitoring results to the monitoring system. It is evident that this invention does not aim to completely replace the original system, but rather to seamlessly integrate it as an enhancement module. This allows for a significant improvement in monitoring capabilities at the lowest possible cost when retrofitting existing substations, while retaining the original effective functions.

[0059] Example 2 Combination Figures 1-6 Based on the circuit breaker opening and closing monitoring system of Embodiment 1, a circuit breaker opening and closing monitoring method is proposed here. The execution subject of this method can be the circuit breaker monitoring system. The opening and closing monitoring system includes: a closing unit 1 and a opening unit 4; wherein the closing unit 1 includes: a closing common circuit 11 and a re-closing monitoring circuit 12 connected in series therewith, and a tripping monitoring circuit 24; the opening unit 4 includes: an opening common circuit 41 and a re-opening monitoring circuit 42 connected in series therewith, and a closing monitoring circuit 27. Specifically, the method includes the following steps: S201, The monitoring system responds to the circuit breaker closing command; S202, the monitoring system controls the first switch 2 in the reclosing monitoring circuit 12 to close, controls the fifth switch 28 in the closing position monitoring circuit 27 to close, and simultaneously closes the energy storage switch 14 in the closing common circuit 11. If the current reclosing monitoring circuit 12 is conducting, the reclosing relay 3 is energized, the reclosing signal circuit 7 is not conducting, and the reclosing alarm signal in the monitoring system background is not triggered to confirm that the circuit breaker will close normally the next time. If the current closing position monitoring circuit 27 is conducting, the closing position relay 29 is energized. If the closing position monitoring circuit 27 is not conducting, the control circuit disconnection signal in the monitoring system background will not be triggered to confirm that the circuit breaker will open normally the next time.

[0060] Based on the aforementioned principles, when the monitoring system receives the circuit breaker closing command, the circuit breaker is in the closed state. At this time, it is necessary to perform reclosing monitoring and closing position monitoring. On the one hand, it is to obtain whether the circuit breaker's opening function is normal, and on the other hand, it is to obtain whether the circuit breaker's closing function is normal.

[0061] Specifically, the monitoring process for a circuit breaker in the closed state is as follows: (1) Circuit breaker reclosing monitoring, that is, monitoring the conduction status of the circuit when the circuit breaker is closed again: After the circuit breaker receives the closing command, the first switch 2 closes, and the energy storage switch 14 in the closing common circuit 11 closes after energy storage. If the reclosing monitoring circuit 12 is normally connected, the reclosing relay 3 is energized, and the normally closed contact of the reclosing relay 3 will open. At this time, the reclosing signal circuit 7 is not connected, indicating that the closing common circuit 11 and the reclosing monitoring circuit 12 connected in series with it are functioning normally and will not trigger the reclosing alarm signal in the monitoring system background.

[0062] Conversely, if the first switch 2 is closed at this time, and the energy storage switch 14 in the closing common circuit 11 has not completed energy storage and closure, or if other electrical components in the closing common circuit 11 malfunction, then the reclosing monitoring circuit 12 will be in a non-conducting state, de-energizing the reclosing relay 3. The normally closed contact of the reclosing relay 3 will then conduct. Since the time relay 22 in the reclosing signal circuit 7 has been energized after time T1, the delayed normally closed contact will conduct, and the normally closed contact of the first auxiliary switch 9 will also close after the circuit breaker receives the closing command. Therefore, the reclosing signal circuit 7 will conduct at this time. The monitoring system background receives the conduction signal of the reclosing signal circuit 7 and triggers the reclosing alarm signal, determining that the circuit breaker reclosing is abnormal and requires timely repair.

[0063] (2) Circuit breaker closing position monitoring: After the circuit breaker receives the closing command, the fifth switch 28 closes. If the tripping common circuit 41 is normal at this time, the closing position monitoring circuit 27 will be turned on, the closing position relay 29 will be energized, the normally closed contact of the closing position relay 29 in the control disconnection monitoring circuit 30 will be opened, the control disconnection monitoring circuit 30 will not be turned on, and the control circuit disconnection signal in the background of the monitoring system will not be triggered.

[0064] Conversely, after the circuit breaker receives the closing command, the fifth switch 28 closes. If the tripping common circuit 41 fails to conduct at this time, the closing position monitoring circuit 27 will not conduct, the closing position relay 29 will not be energized, and the normally closed contact of the closing position relay 29 in the control disconnection monitoring circuit 30 will conduct. Since the normally closed contact of the tripping relay 26 in the control disconnection monitoring circuit 30 is in the conducting state at this time (the tripping relay 26 is not energized at this time), the control disconnection monitoring circuit 30 is activated, triggering the control circuit disconnection signal in the monitoring system's background to prompt technicians to perform timely maintenance.

[0065] Furthermore, in addition to monitoring under closing commands, the method also includes monitoring under opening commands. Specifically, the method further includes: S301, The monitoring system responds to the circuit breaker tripping command; S302, The monitoring system controls the second switch 5 in the re-distribution monitoring circuit 42 to close, and controls the fourth switch 25 in the trip monitoring circuit 24 to close. If the current re-opening monitoring circuit 42 is open, the re-opening relay 6 is energized, and the re-opening signal circuit 8 is not open, so the re-opening alarm signal in the monitoring system background is not triggered to confirm that the circuit breaker will open normally the next time. If the current trip monitoring circuit 24 is conducting, the trip relay 26 is energized. If the trip monitoring circuit 24 is not conducting, the control circuit disconnection signal in the monitoring system background will not be triggered to confirm that the circuit breaker will close normally the next time.

[0066] Based on the aforementioned principles, when the monitoring system receives the circuit breaker tripping command, the circuit breaker is in the tripping state. At this time, it is necessary to perform re-tripping monitoring and tripping monitoring. On the one hand, it is to obtain whether the circuit breaker closing function is normal in the next step, and on the other hand, it is to obtain whether the circuit breaker tripping function is normal in the next step.

[0067] Specifically, the monitoring process for a circuit breaker in the closed state is as follows: (1) Circuit breaker re-opening monitoring, that is, monitoring the conduction status of the circuit when the circuit breaker is opened again: After the circuit breaker receives the tripping command, the second switch 5 closes, and the tripping common circuit 41 is normally connected. Then the re-tripping relay 6 will be energized, and the normally closed contact of the re-tripping relay 6 will be opened. At this time, the re-tripping signal circuit 8 will not be connected, indicating that the tripping common circuit 41 and the re-tripping monitoring circuit 42 connected in series with it are functioning normally and will not trigger the re-tripping alarm signal in the monitoring system background.

[0068] Conversely, if the second switch 5 is closed at this time, and the electrical components of the tripping common circuit 41 malfunction and fail to conduct, then the re-tripping monitoring circuit 42 will be in a non-conducting state, de-energizing the re-tripping relay 6. The normally closed contact of the re-tripping relay 6 will then conduct. Since the normally closed contact of the second auxiliary switch 10 in the re-tripping signal circuit 8 will also close after the circuit breaker receives the tripping command, the re-tripping signal circuit 8 will conduct at this time. The monitoring system background receives the conduction signal of the re-tripping signal circuit 8 and triggers the re-tripping alarm signal, determining that the circuit breaker's re-tripping is abnormal and requires timely repair.

[0069] (2) Circuit breaker tripping monitoring: After the circuit breaker receives the trip command, the fourth switch 25 closes. If the closing common circuit 11 is normal at this time, the trip monitoring circuit 24 will be turned on, the trip relay 26 will be energized, the normally closed contact of the trip relay 26 in the control disconnection monitoring circuit 30 will be opened, the control disconnection monitoring circuit 30 will not be turned on, and the control circuit disconnection signal in the background of the monitoring system will not be triggered.

[0070] Conversely, after the circuit breaker receives the trip command, the fourth switch 25 closes. If the closing common circuit 11 fails to conduct at this time, the trip monitoring circuit 24 will not conduct, the trip relay 26 will not be energized, and the normally closed contact of the trip relay 26 in the control disconnection monitoring circuit 30 will conduct. Since the normally closed contact of the closing relay 29 in the control disconnection monitoring circuit 30 is in the conducting state at this time (the closing relay 29 is not energized at this time), the control disconnection monitoring circuit 30 is activated, triggering the control circuit disconnection signal in the monitoring system's background to prompt technicians to perform timely maintenance.

[0071] Based on the above description, this invention proposes a circuit breaker opening and closing monitoring method. When the circuit breaker receives an opening or closing command (or is in the corresponding state), the system simultaneously activates two detection mechanisms: same-state monitoring and cross-state monitoring. By determining whether the reclosing monitoring circuit and the reopening monitoring circuit are conductive, the system directly confirms whether the circuit for the next same-state operation (closing again after closing, or opening again after opening) is normal, thus achieving proactive verification of the operation link. This method fundamentally solves the blind spot problem of traditional monitoring and brings two core benefits: First, it realizes the transformation from passive protection to proactive prevention. By pre-verifying the integrity of the next same-state circuit before the current operation, it can proactively warn of two major risks: reclosing failure and cascading tripping. Second, it constructs a comprehensive monitoring logic, combining same-state monitoring and cross-state monitoring to simultaneously complete the diagnosis of the circuit breaker's full state and full circuit health within a single process, improving the system's reliability and security.

[0072] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A circuit breaker opening and closing monitoring system, characterized in that, include: The closing unit (1) includes: a closing common circuit (11) and a reclosing monitoring circuit (12) connected in series with it. The reclosing monitoring circuit (12) includes: a first switch (2) and a reclosing relay (3) connected together, wherein the first switch (2) is configured to close when the circuit breaker is in the closed state; the reclosing relay (3) is energized when the closing common circuit (11) is open, and its normally closed contact is open; the reclosing monitoring circuit (12) is used to monitor the circuit continuity of the circuit breaker in the closed state when it is closed again. The tripping unit (4) includes: a tripping common circuit (41) and a re-tripping monitoring circuit (42) connected in series with it. The re-opening monitoring circuit (42) includes: a second switch (5) and a re-opening relay (6) connected together, the second switch (5) being configured to close when the circuit breaker is in the open state; the re-opening relay (6) being energized when the common circuit (41) of the opening is complete, and its normally closed contact being open; the re-opening monitoring circuit (42) is used to monitor the conduction status of the circuit when the circuit breaker in the open state is opened again; The monitoring unit includes a re-closing signal circuit (7) and a re-disconnecting signal circuit (8). The common signal terminal of the re-closing signal circuit (7) is connected to the monitoring system backend via at least the normally closed contact of the re-closing relay (3) and the normally closed contact of the first auxiliary switch (9). The common signal terminal of the re-disconnecting signal circuit (8) is connected to the monitoring system backend via at least the normally closed contact of the re-disconnecting relay (6) and the normally closed contact of the second auxiliary switch (10).

2. The circuit breaker opening and closing monitoring system according to claim 1, characterized in that, The closing common circuit (11) includes: a closing coil (13) connected to the negative power supply terminal, an energy storage switch (14), a normally closed contact (15) of the first low-pressure lockout relay, and a normally closed contact (16) of the anti-pump relay; wherein, one end of the normally closed contact (16) of the anti-pump relay is connected to the normally closed contact (15) of the first low-pressure lockout relay, and the other end is connected to the first switch (2).

3. The circuit breaker opening and closing monitoring system according to claim 1, characterized in that, The tripping common circuit (41) includes: a tripping coil (17) connected to the negative power supply terminal and a normally closed contact (18) of the second low-pressure lockout relay; wherein, the other end of the normally closed contact (18) of the second low-pressure lockout relay is connected to the second switch (5).

4. The circuit breaker opening and closing monitoring system according to claim 1, characterized in that, The reconnection monitoring circuit (12) further includes: a first matching resistor (19) connected to the reconnection relay (3), the other end of which is connected to the positive power supply terminal; The resizing monitoring circuit (42) further includes a second matching resistor (20) connected to the resizing relay (6), the other end of which is connected to the positive power supply terminal.

5. The circuit breaker opening and closing monitoring system according to claim 2, characterized in that, The closing unit (1) also includes: a false alarm prevention circuit (21); The false alarm prevention circuit (21) is connected in parallel with the closing common circuit (11) and the reclosing monitoring circuit (12). The false alarm prevention circuit (21) includes a third switch (23) and a time relay (22) connected between the positive power supply terminal and the negative power supply terminal. When the time relay (22) is energized, its own delayed dynamic contact is disconnected. The common terminal of the reconnection signal circuit (7) is connected to the monitoring system backend via the normally closed contact of the reconnection relay (3), the normally closed contact of the first auxiliary switch (9), and the delayed normally open contact of the time relay (22); The operating duration of the time relay (22) is greater than the switching duration of the energy storage switch (14).

6. The circuit breaker opening and closing monitoring system according to claim 1, characterized in that, The closing unit (1) further includes: a trip monitoring circuit (24), which is connected in parallel with the reclosing monitoring circuit (12) and connected in series with the closing common circuit (11); the trip monitoring circuit (24) includes: a fourth switch (25) and a trip relay (26) connected together, which is used to monitor the conduction status of the circuit when the circuit breaker is closed again in the open state; The tripping unit (4) further includes: a closing position monitoring circuit (27); the closing position monitoring circuit (27) is connected in parallel with the re-tripping monitoring circuit (42) and connected in series with the tripping common circuit (41); the closing position monitoring circuit (27) includes: a connected fifth switch (28) and a closing position relay (29), and the closing position monitoring circuit (27) is used to monitor the conduction status of the circuit when the circuit breaker trips again in the closed state; The monitoring unit further includes a control disconnection monitoring circuit (30), the signal common terminal of the control disconnection monitoring circuit (30) is connected to the monitoring system backend via the normally closed contact of the jump relay (26) and the normally closed contact of the close relay (29).

7. A method for monitoring the opening and closing of a circuit breaker, characterized in that, The circuit breaker opening and closing monitoring system according to any one of claims 1-6 includes: a closing unit (1) and an opening unit (4); wherein the closing unit (1) includes: a closing common circuit (11) and a reclosing monitoring circuit (12) connected in series therewith, and a tripping monitoring circuit (24); the opening unit (4) includes: an opening common circuit (41) and a re-opening monitoring circuit (42) connected in series therewith, and a closing monitoring circuit (27); the method includes: Responding to the circuit breaker closing command; Control the first switch (2) in the reclosing monitoring circuit (12) to close, control the fifth switch (28) in the closing position monitoring circuit (27) to close, and simultaneously close the energy storage switch (14) in the closing common circuit (11). If the current reclosing monitoring circuit (12) is on, the reclosing relay (3) is energized, the reclosing signal circuit (7) is not on, and the reclosing alarm signal of the monitoring system background is not triggered to confirm that the circuit breaker will close normally the next time. If the current closing monitoring circuit (27) is on, the closing relay (29) is energized. If the closing monitoring circuit (27) is not on, the control circuit disconnection signal of the monitoring system background will not be triggered to confirm that the circuit breaker will open normally next time.

8. The circuit breaker opening and closing monitoring method according to claim 7, characterized in that, The method also includes: In response to the circuit breaker tripping command; Control the second switch (5) in the re-division monitoring circuit (42) to close, and control the fourth switch (25) in the jump position monitoring circuit (24) to close; If the current re-splitting monitoring circuit (42) is on, the re-splitting relay (6) is energized, the re-splitting signal circuit (8) is not on, and the re-splitting alarm signal of the monitoring system background is not triggered to confirm that the circuit breaker will be on normal for the next trip. If the trip monitoring circuit (24) is currently on, the trip relay (26) is energized. If the trip monitoring circuit (24) is not on, the control circuit disconnection signal of the monitoring system background is not triggered to confirm that the circuit breaker will close normally the next time.

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