Abnormity processing method, device and system for circuit breaker control loop

Abstract

The invention discloses an exception handling method, device and system for a circuit breaker control loop. The method comprises the following steps: respectively obtaining a power supply voltage value and a loop voltage value; determining a power supply voltage change degree value based on the power supply voltage value, and determining a loop voltage change degree value based on the loop voltage value and the power supply voltage value; and when it is determined that the circuit breaker control loop is abnormal according to the power supply voltage change degree value and the comparison result of the power supply voltage value and a preset power supply threshold value, or when it is determined that the circuit breaker control loop is abnormal according to the comparison result of the loop voltage change degree value and a preset loop threshold value, alarm processing is triggered. According to the method, the threshold range of abnormity monitoring can be widened by setting the parameter threshold, so that the accuracy and sensitivity of triggering abnormity are improved, monitoring is carried out in combination with the circuit parameter threshold in the normal state, the actual condition of the circuit can be fit, the monitoring accuracy is further improved, and an alarm prompt is sent to a technician in time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit control, and in particular to an abnormality processing method, device and system of a circuit breaker control loop. BACKGROUND

[0002] The circuit breaker control loop is the most important secondary loop for controlling the reliable opening and closing of the circuit breaker mechanism, and the integrity of the control loop is related to the reliability of the circuit breaker action. Therefore, real-time monitoring of the control loop state is extremely important for the power network.

[0003] In order to timely inform the technical personnel to process the circuit when the circuit breaker control loop is abnormal, one of the commonly used methods is to use a voltage type relay to monitor part of the key secondary loop. One is to configure a power supply monitoring relay ZJ to monitor the control power supply loop, and the other is to configure a trip and close loop monitoring relay HWJ / TWJ to monitor the integrity of the trip and close loop. Once a serious fault occurs, such as a significant decrease or loss of voltage of the DC system, tripping of the control power supply air switch, disconnection or loose connection of the control power supply loop or the trip and close loop, or inoperable contacts, the control power supply loss alarm and the control loop disconnection alarm can be timely issued to inform the maintenance personnel to process as soon as possible.

[0004] However, the above method has the following technical problems: the operating voltage and the return voltage of the voltage type relay are generally in the range of 30%-70% of the DC rated voltage, that is, the power supply monitoring relay ZJ is triggered only when the control power supply voltage is reduced to 70% of the DC rated voltage or below, thus there is a large monitoring blind area. Moreover, the internal resistance of the trip and close loop monitoring relay HWJ / TWJ is much larger than the resistance of the trip and close coil TQ / HQ. When the trip and close loop is intact, the control power supply voltage is basically dropped on the monitoring relay. Only when the trip and close loop has a disconnection or loose connection, or inoperable contacts, and other serious faults cause the resistance of the trip and close loop to increase significantly, the voltage drop on the monitoring relay can be significantly reduced and the operation is triggered. Therefore, there is also a large monitoring blind area, and the monitoring accuracy and sensitivity are low. SUMMARY

[0005] The present application provides a circuit breaker control loop abnormality processing method, device, system, equipment and medium, which can solve the technical problem of the prior art that the monitoring has a large blind area and the monitoring accuracy and sensitivity are low.

[0006] A first aspect of the embodiment of the present application provides a circuit breaker control loop abnormality processing method, which comprises: respectively acquiring a power supply voltage value and a loop voltage value, wherein the power supply voltage value is a real-time voltage value of the control power supply, and the loop voltage value is a real-time voltage value between the trip loop and the positive terminal of the control power supply; determine a power supply voltage variation degree value based on the power supply voltage value, and determine a loop voltage variation degree value based on the loop voltage value and the power supply voltage value; determine that the circuit breaker control loop is abnormal according to a comparison result of the power supply voltage variation degree value and the power supply voltage value with a preset power supply threshold value, or according to a comparison result of the loop voltage variation degree value with a preset loop threshold value, and trigger an alarm processing; The preset power supply threshold value and the preset loop threshold value are threshold values set according to circuit parameters collected in a normal state of the circuit breaker control loop.

[0007] The application can determine a power supply voltage variation degree value and a loop voltage variation degree value according to a power supply voltage value and a loop voltage value respectively, compare the power supply voltage variation degree value and the loop voltage variation degree value with threshold values of circuit parameters collected in a normal state of the circuit breaker control loop to determine whether the circuit is abnormal, and trigger an alarm immediately in the case of abnormality. The threshold value range of abnormality monitoring can be widened by setting the parameter threshold values, so as to improve the accuracy and sensitivity of triggering abnormality. Moreover, the actual situation of the circuit can be fitted by monitoring in combination with the threshold values of the circuit parameters in the normal state, so as to further improve the accuracy of monitoring and send an alarm prompt to the technical personnel in time.

[0008] A second aspect of the embodiment of the application provides an abnormality processing device of a circuit breaker control loop, and the device comprises: An acquisition module is configured to acquire a power supply voltage value and a loop voltage value respectively, wherein the power supply voltage value is a real-time voltage value of a control power supply, and the loop voltage value is a real-time voltage value between a trip loop and a positive power supply terminal of the control power supply; A determination module is configured to determine a power supply voltage variation degree value based on the power supply voltage value, and determine a loop voltage variation degree value based on the loop voltage value and the power supply voltage value; A processing module is configured to determine that the circuit breaker control loop is abnormal according to a comparison result of the power supply voltage variation degree value and the power supply voltage value with a preset power supply threshold value, or according to a comparison result of the loop voltage variation degree value with a preset loop threshold value, and trigger an alarm processing. The preset power supply threshold value and the preset loop threshold value are threshold values set according to circuit parameters collected in a normal state of the circuit breaker control loop.

[0009] A third aspect of the embodiment of the application provides an abnormality processing system of a circuit breaker control loop, and the system comprises: The circuit breaker operating box, the circuit breaker mechanism box and the circuit breaker control loop state monitoring device are connected respectively, and the circuit breaker control loop state monitoring device is suitable for the abnormality processing method of the circuit breaker control loop.

[0010] Compared with the prior art, the embodiment of the application provides an abnormality processing method, device, system, equipment and medium for a circuit breaker control loop, which has the beneficial effects that: the power supply voltage value and the loop voltage value can be acquired respectively; the power supply voltage change degree value is determined based on the power supply voltage value, and the loop voltage change degree value is determined based on the loop voltage value and the power supply voltage value; when it is determined that the circuit breaker control loop is abnormal according to the comparison result of the power supply voltage change degree value and the power supply voltage value with the preset power supply threshold value, or when it is determined that the circuit breaker control loop is abnormal according to the comparison result of the loop voltage change degree value and the preset loop threshold value, the alarm processing is triggered; wherein the preset power supply threshold value and the preset loop threshold value are threshold values set according to the circuit parameters collected in the normal state of the circuit breaker control loop. The power supply voltage change degree value and the loop voltage change degree value can be determined according to the power supply voltage value and the loop voltage value respectively, the circuit is determined to be abnormal or not by comparing the power supply voltage change degree value and the loop voltage change degree value with the threshold value of the circuit parameters collected in the normal state of the circuit breaker control loop, and the alarm is triggered immediately in the abnormality. By setting the parameter threshold value, the threshold value range of abnormality monitoring can be widened, so as to improve the accuracy and sensitivity of triggering the abnormality, and the combination of the circuit parameter threshold value in the normal state for monitoring can be in line with the actual situation of the circuit, further improving the accuracy of monitoring, and sending the alarm prompt to the technician in time. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a flowchart of an abnormality processing method for a circuit breaker control loop provided by an embodiment of the application; Figure 2 is a circuit principle diagram of abnormality processing of a three-phase circuit breaker control loop provided by an embodiment of the application; Figure 3 is a circuit principle diagram of abnormality processing of a split-phase circuit breaker control loop provided by an embodiment of the application; Figure 4 is a structure diagram of an abnormality processing device for a circuit breaker control loop provided by an embodiment of the application; Figure 5 is a structure diagram of an abnormality processing system for a circuit breaker control loop provided by an embodiment of the application; Figure 6 is a structure diagram of a circuit breaker control loop state monitoring device provided by an embodiment of the application. DETAILED DESCRIPTION

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] The circuit breaker control circuit is the most important secondary circuit for reliably opening and closing the circuit breaker mechanism. The integrity of the control circuit is crucial to the reliability of the circuit breaker's operation. Therefore, real-time monitoring of the control circuit status is extremely important for the power network.

[0014] To promptly notify technicians of any abnormalities in the circuit breaker control circuit, a common method is to use voltage-type relays to monitor critical secondary circuits. This involves configuring two relays: a power supply monitoring relay (ZJ) to monitor the control power supply circuit, and trip / close circuit monitoring relays (HWJ / TWJ) to monitor the integrity of the trip / close circuit. In the event of serious faults such as a significant drop or loss of DC system voltage, tripping of the control power supply circuit breaker, open circuit or loose wiring in the control power supply or trip / close circuit, or broken contacts, timely alarms for control power failure and control circuit disconnection can be issued to notify maintenance personnel for prompt handling.

[0015] However, the above method has the following technical problems: The operating voltage and return voltage of voltage-type relays are generally within the range of 30%-70% of the rated DC voltage. That is, the power supply monitoring relay ZJ is only triggered when the control power supply voltage drops to 70% of the rated DC voltage or below, thus creating a large monitoring blind zone. Moreover, the internal resistance of the trip-closing circuit monitoring relays HWJ / TWJ is much greater than the resistance of the trip-closing coils TQ / HQ. When the trip-closing circuit is intact, the control power supply voltage basically drops across the monitoring relay. Only when a serious fault such as a broken wire, loose wiring, or disconnected contacts occurs in the trip-closing circuit, causing a significant increase in the resistance of the trip-closing circuit, can the voltage drop across the monitoring relay be significantly reduced and the operation triggered. Therefore, there is also a large monitoring blind zone, and the monitoring accuracy and sensitivity are low.

[0016] To address the aforementioned issues, the following detailed description and explanation will be provided through specific embodiments of an anomaly handling method, apparatus, device, and medium for a circuit breaker control circuit provided in this application.

[0017] To address the technical problem of large blind spots in existing monitoring technologies, resulting in low monitoring accuracy and sensitivity, this paper refers to... Figure 1 The diagram shows a flowchart of an abnormal handling method for a circuit breaker control circuit according to an embodiment of the present invention.

[0018] As an example, the abnormal handling method of the circuit breaker control circuit may include: S11. Obtain the power supply voltage value and the loop voltage value respectively, wherein the power supply voltage value is the real-time voltage value of the control power supply, and the loop voltage value is the real-time voltage value between the trip circuit and the positive terminal of the control power supply.

[0019] In one embodiment, the circuit breaker control circuit can be status monitored to determine if there are any abnormalities in the circuit breaker control circuit. To accurately monitor whether there are abnormalities in the circuit breaker control circuit, the power supply voltage value and the circuit voltage value can be obtained.

[0020] Wherein, the power supply voltage value is the real-time voltage value of the control power supply, and the circuit voltage value is the real-time voltage value between the trip circuit and the positive terminal of the control power supply.

[0021] In one embodiment, the circuit breaker control circuit can be a three-phase circuit breaker control circuit or a single-phase circuit breaker control circuit.

[0022] Reference Figures 2-3 The diagrams show the circuit diagrams for abnormal handling of a three-phase circuit breaker control circuit according to an embodiment of the present invention and the circuit diagrams for abnormal handling of a single-phase circuit breaker control circuit according to an embodiment of the present invention.

[0023] Reference Figure 2 If the circuit breaker control circuit is a three-phase circuit breaker control circuit, it can be controlled through... Figure 2 voltmeter V 12 Obtain power supply voltage value . Reference Figure 3 If the circuit breaker control circuit is a phase-separated circuit breaker control circuit, it can also be controlled through... Figure 3 voltmeter V 12 Obtain power supply voltage value Voltmeter V 12 Collect the voltage value between control power nodes 1 and 2 to obtain the power supply voltage value. .

[0024] Reference Figure 2 If the circuit breaker control circuit is a three-phase circuit breaker control circuit, it can be checked by measuring the voltmeter V. 13 By collecting the voltage values ​​between nodes 1-3 of the trip circuit, the loop voltage value between the trip circuit and the positive terminal of the control power supply is obtained. . Reference Figure 3 If the circuit breaker control circuit is a phase-separated circuit breaker control circuit, the voltmeter V... 1A Collect the voltage values ​​between nodes 1 and A of the A-phase trip circuit to obtain the loop voltage value between the A-phase trip circuit and the positive terminal of the control power supply. Similarly, this can be verified using a voltmeter V. 1B Collect the voltage values ​​between nodes 1 and B of the B-phase trip circuit to obtain the loop voltage value between the B-phase trip circuit and the positive terminal of the control power supply. ; via voltmeter V 1C Collect the voltage values ​​between nodes 1 and C of the C-phase trip circuit to obtain the loop voltage value between the C-phase trip circuit and the positive terminal of the control power supply. .

[0025] It should be noted that, Figure 2 In the diagram, ZJ is the control power monitoring relay, HWJ is the trip circuit monitoring relay, and TQ is the trip coil.

[0026] Figure 3 In the diagram, ZJ is the control power monitoring relay, HWJA is the A-phase trip circuit monitoring relay, TQA is the A-phase trip coil, HWJB is the B-phase trip circuit monitoring relay, TQB is the B-phase trip coil, HWJC is the C-phase trip circuit monitoring relay, and TQC is the C-phase trip coil.

[0027] S12. Determine the degree of change of the power supply voltage based on the power supply voltage value, and determine the degree of change of the circuit voltage based on the circuit voltage value and the power supply voltage value.

[0028] The degree of power supply voltage variation can be calculated using the power supply voltage value, which represents the extent of power supply voltage change. Next, the degree of circuit voltage variation can be calculated using the circuit voltage value and the power supply voltage value, which represents the degree of change in the trip circuit voltage.

[0029] In an optional embodiment, determining the degree of power supply voltage variation based on the power supply voltage value may include the following sub-steps: S21. Determine the power supply voltage value and the rated voltage value of the DC system.

[0030] S22. Calculate the degree of power supply voltage variation using the power supply difference and the rated voltage of the DC system.

[0031] Specifically, the calculation of the degree of change in power supply voltage can be shown by the following formula: ; In the above formula, This represents the degree of change in power supply voltage. The rated voltage of the DC system. This is the power supply voltage value.

[0032] In an optional embodiment, the circuit breaker control circuit can be a three-phase circuit breaker control circuit. As an example, determining the degree of circuit voltage variation based on the circuit voltage value and the power supply voltage value may include the following sub-steps: S31. If the circuit breaker control circuit is a three-phase circuit breaker control circuit, calculate the difference between the circuit voltage value and the power supply voltage value to obtain the three-phase circuit difference.

[0033] S32. Calculate the degree of change in circuit voltage using the three-phase circuit difference and the power supply voltage value.

[0034] In one embodiment, the degree of change in the loop voltage can be calculated as follows: ; In the above formula, This represents the degree of change in the loop voltage. This is the power supply voltage value. It is the circuit voltage value.

[0035] In one embodiment, the circuit breaker control circuit may be a phase-separated circuit breaker control circuit. Determining the degree of circuit voltage variation based on the circuit voltage value and the power supply voltage value may include the following sub-steps: S41. If the circuit breaker control circuit is a phase-separated circuit breaker control circuit, calculate the difference between the circuit voltage value and the power supply voltage value for each phase to obtain the phase-separated circuit difference.

[0036] S42. Calculate the circuit voltage change value of each phase by using the power supply voltage value and the phase difference of each phase circuit.

[0037] Specifically, the calculation of the voltage variation values ​​of phases A, B, and C can be shown by the following formula: ; In the above formula, These are the values ​​of the circuit voltage change for phase A, phase B, and phase C, respectively. This is the loop voltage value of phase A; This is the circuit voltage value for phase B; This is the circuit voltage value for phase C; This is the power supply voltage value.

[0038] S13. When it is determined that there is an abnormality in the circuit breaker control circuit based on the power supply voltage change value and the comparison result between the power supply voltage value and the preset power supply threshold, or when it is determined that there is an abnormality in the circuit breaker control circuit based on the comparison result between the circuit voltage change value and the preset circuit threshold, an alarm process is triggered.

[0039] The preset power supply threshold and the preset circuit threshold are thresholds set based on circuit parameters collected by the circuit breaker control circuit under normal conditions.

[0040] In practice, the presence of an anomaly in the circuit breaker control circuit can be determined by comparing the power supply voltage variation value with a preset power supply threshold value, or by comparing the circuit voltage variation value with a preset circuit threshold value. If an anomaly is found, an alarm is immediately triggered, allowing maintenance personnel to be notified immediately for repair.

[0041] The preset power supply threshold and the preset circuit threshold are thresholds set based on circuit parameters collected by the circuit breaker control circuit under normal conditions.

[0042] In practical applications, the threshold values ​​set based on the circuit parameters collected by the circuit breaker control circuit under normal conditions are compared with the changes in power supply voltage and circuit voltage values. The threshold values ​​can be adjusted according to actual needs, which can not only widen the threshold edge of triggering abnormalities, thereby reducing the blind zone of monitoring and improving the accuracy and sensitivity of monitoring, but also quickly trigger alarms through threshold comparison, improving the efficiency of abnormal alarms and enabling technicians to quickly carry out maintenance.

[0043] In one embodiment, the step of triggering an alarm process when an anomaly is determined in the circuit breaker control circuit based on the power supply voltage change value and the comparison result between the power supply voltage value and a preset power supply threshold may include the following sub-steps: S51. If the power supply voltage change value is greater than or equal to a preset power supply threshold and the power supply voltage value is less than or equal to the rated voltage of the DC system, then it is determined that there is an abnormality in the circuit breaker control circuit. The preset power supply threshold is a threshold determined based on the rated voltage of the DC system and a preset power supply ratio value.

[0044] S52, Output alarm signals to technicians.

[0045] In one operating mode, if the power supply voltage changes by a certain degree... satisfy If this is detected, it indicates an abnormality in the circuit breaker control circuit, which can trigger a control power supply abnormality alarm and output an alarm signal to technicians.

[0046] Reference Figure 2 Alternatively, an alarm indicator light can be set in the circuit. When an alarm is triggered, the alarm indicator light will be turned on to provide an alarm notification, thereby outputting an alarm signal to the technicians.

[0047] Regarding the control power supply voltage, relevant regulations require that the voltage drop from the control bus to the trip / close coil of the DC system should not exceed [a certain value]. Meanwhile, the DC system control bus voltage changes in Therefore, the control power supply voltage change exceeds An alarm should be triggered when the alarm threshold is set to 10%.

[0048] In one embodiment, an anomaly may occur in the circuit. For example, when an anomaly is determined in the circuit breaker control circuit based on a comparison of the circuit voltage change value with a preset circuit threshold, triggering the alarm process may include the following sub-steps: S61. If the voltage change value of the circuit is greater than or equal to the preset circuit threshold, it is determined that there is an abnormality in the circuit breaker control circuit.

[0049] S62, Output alarm signals to technicians.

[0050] Specifically, for a three-phase circuit breaker control circuit, if the degree of change in circuit voltage is... satisfy If an abnormality is detected in the circuit breaker control circuit, an alarm signal can be sent to the technicians, and a tripping process can be triggered.

[0051] in, It is a preset loop threshold; For reliability coefficient ( ( ), preferably, it can be 1.5. The alarm threshold value for changes in trip circuit voltage should be lower than the percentage of trip circuit voltage when the trip circuit is in normal condition.

[0052] Specifically, an alarm indicator light can be set in the circuit breaker circuit. When an alarm is triggered, the alarm indicator light is turned on to provide an alarm notification, thereby outputting an alarm signal to the technicians.

[0053] In one embodiment, the step of triggering an alarm when an anomaly is determined in the circuit breaker control circuit based on a comparison between the circuit voltage change value and a preset circuit threshold may include the following sub-steps: S71. If the voltage change value of any phase of the circuit is greater than or equal to the preset circuit threshold, it is determined that there is an abnormality in the circuit breaker control circuit.

[0054] S72, Output alarm signals to technicians.

[0055] In practical operation, for the control circuit of a phase-by-phase circuit breaker, if the voltage variation value of any phase of the circuit is... Each satisfies This will trigger an abnormal alarm in the corresponding phase trip circuit.

[0056] in, It is a preset loop threshold.

[0057] In one embodiment, determining the preset loop threshold may include the following sub-steps: S81. Collect a first voltage value and a second voltage value, and use the first voltage value and the second voltage value to calculate a preset circuit threshold, wherein the first voltage value is the voltage value of the power supply in the trip circuit under normal conditions, and the second voltage value is the voltage value of the circuit in the trip circuit under normal conditions.

[0058] S82. Collect the first resistance value and the second resistance value, and calculate the preset circuit threshold using the first resistance value and the second resistance value, wherein the first resistance value is the internal resistance value of the trip circuit monitoring relay, and the second resistance value is the resistance value of the entire trip circuit under normal conditions.

[0059] In one embodiment, the proportion of the trip circuit voltage under normal conditions can be calculated using a first voltage value and a second voltage value. Then, based on the trip circuit voltage ratio and reliability factor Determine the preset loop threshold .

[0060] Specifically, the proportion of trip circuit voltage The calculation can be shown in the following formula: ; In the above formula, This is the first voltage value, specifically the power supply voltage value when the trip circuit is in normal condition; This is the second voltage value, specifically the trip circuit voltage value when the trip circuit is in normal condition.

[0061] Similarly, the voltage ratio of the trip circuit under normal conditions can be calculated by collecting the first resistance value and the second resistance value. Then, based on the trip circuit voltage ratio and reliability factor Determine the preset loop threshold .

[0062] Specifically, the proportion of trip circuit voltage The calculation can be shown in the following formula: ; In the above formula, This is the first resistance value, specifically the internal resistance value of the trip circuit monitoring relay HWJ. This is the second resistance value, specifically the total circuit resistance value of the trip circuit when it is in normal operating condition.

[0063] The degree of change in the circuit voltage of the tripping circuit or It can indirectly reflect the real-time degradation level of the tripping circuit, and the degradation level of the tripping circuit is mainly reflected in the increase of the total circuit resistance of the tripping circuit. Specifically, it can be shown in the following formula. in, The internal resistance value of the monitoring relay HWJ for the trip circuit is determined. This represents the total circuit resistance of the trip circuit under normal operating conditions, including the trip coil resistance (TQ), contact resistance, cable resistance, etc. This is the additional resistance generated by the trip circuit when the trip circuit is in an abnormal state.

[0064] It can be seen that the real-time change of the total circuit resistance of the trip circuit is... The magnitude and the degree of change in the circuit voltage of the tripping circuit. or Closely related, showing a direct proportional relationship; when When it grows bigger Decrease, then Increase.

[0065] Therefore, by calculating the trip circuit in real time This can reflect circuit abnormalities with weaker characteristics, such as poor wiring contact or contact oxidation leading to a slow and continuous increase in contact resistance, in the tripping circuit. It can reflect the early development process of the circuit fault, but at this time, due to... The resulting voltage drop is small, and the trip circuit monitoring relay HWJ cannot return; it only returns when a more serious fault occurs in the trip circuit, such as a broken wire, loose wiring, or severe oxidation of contacts causing a break in the contacts. Significantly increased, The resulting voltage drop also increases significantly, which is necessary for the trip circuit monitoring relay HWJ to return, and only then can a control circuit disconnection alarm signal be issued.

[0066] Furthermore, it should be noted that by setting reasonable thresholds, this invention can broaden the monitoring range, thereby quickly determining whether an anomaly has occurred and improving monitoring sensitivity. Moreover, this method can promptly issue an alarm when an anomaly occurs in the trip circuit (such as a circuit break), allowing for timely notification to professionals for handling and preventing the TQ from failing to energize when it trips.

[0067] In this embodiment, the present invention provides an abnormality handling method for a circuit breaker control circuit. Its advantages are as follows: the present invention can acquire the power supply voltage value and the circuit voltage value separately; determine the degree of power supply voltage change based on the power supply voltage value, and determine the degree of circuit voltage change based on the circuit voltage value and the power supply voltage value; when an abnormality is determined in the circuit breaker control circuit based on the degree of power supply voltage change value and the comparison result between the power supply voltage value and a preset power supply threshold, or when an abnormality is determined in the circuit breaker control circuit based on the comparison result between the degree of circuit voltage change value and a preset circuit threshold, an alarm is triggered; wherein, the preset power supply threshold and the preset circuit threshold are thresholds set based on the circuit parameters collected by the circuit breaker control circuit under normal conditions. The present invention can determine the degree of power supply voltage change value and the degree of circuit voltage change value based on the power supply voltage value and the circuit voltage value respectively, compare the degree of power supply voltage change value and the degree of circuit voltage change value with the circuit parameter thresholds collected by the circuit breaker control circuit under normal conditions to determine whether the circuit is abnormal, and immediately trigger an alarm if an abnormality occurs. By setting parameter thresholds, the threshold range for anomaly monitoring can be broadened, thereby improving the accuracy and sensitivity of triggering anomalies. Furthermore, by combining monitoring with circuit parameter thresholds under normal conditions, the actual condition of the circuit can be closely matched, further improving the accuracy of monitoring and sending timely alarm prompts to technicians.

[0068] This invention also provides an anomaly handling device for a circuit breaker control circuit, see [link to relevant documentation]. Figure 4 The diagram shows a structural schematic of an abnormality handling device for a circuit breaker control circuit provided in an embodiment of the present invention.

[0069] As an example, the fault handling device for the circuit breaker control circuit may include: The acquisition module 201 is used to acquire the power supply voltage value and the loop voltage value respectively, wherein the power supply voltage value is the real-time voltage value of the control power supply, and the loop voltage value is the real-time voltage value between the trip circuit and the positive terminal of the control power supply. The determining module 202 is used to determine the degree of change of the power supply voltage based on the power supply voltage value, and to determine the degree of change of the loop voltage based on the loop voltage value and the power supply voltage value; The processing module 203 is used to trigger an alarm process when it is determined that there is an abnormality in the circuit breaker control circuit based on the power supply voltage change value and the comparison result between the power supply voltage value and the preset power supply threshold, or when it is determined that there is an abnormality in the circuit breaker control circuit based on the comparison result between the circuit voltage change value and the preset circuit threshold. The preset power supply threshold and the preset circuit threshold are thresholds set based on circuit parameters collected by the circuit breaker control circuit under normal conditions.

[0070] Optionally, determining the degree of power supply voltage change based on the power supply voltage value includes: Determine the power supply voltage value and the power supply difference between the power supply voltage value and the rated voltage value of the DC system; The degree of power supply voltage variation is calculated using the power supply difference and the rated voltage of the DC system.

[0071] Optionally, when an abnormality is determined in the circuit breaker control circuit based on the power supply voltage change value and the comparison result between the power supply voltage value and a preset power supply threshold, the alarm processing is triggered, including: If the power supply voltage change value is greater than or equal to a preset power supply threshold and the power supply voltage value is less than or equal to the rated voltage of the DC system, then it is determined that there is an abnormality in the circuit breaker control circuit. The preset power supply threshold is a threshold determined based on the rated voltage of the DC system and a preset power supply ratio value. Send alarm signals to technical personnel.

[0072] Optionally, determining the degree of loop voltage change based on the loop voltage value and the power supply voltage value includes: If the circuit breaker control circuit is a three-phase circuit breaker control circuit, then calculate the difference between the circuit voltage value and the power supply voltage value to obtain the three-phase circuit difference. The degree of change in circuit voltage is calculated using the three-phase circuit difference and the power supply voltage value.

[0073] Optionally, when an alarm is triggered based on a comparison between the circuit voltage change value and a preset circuit threshold, the alarm process includes: If the voltage change value of the circuit is greater than or equal to the preset circuit threshold, it is determined that there is an abnormality in the circuit breaker control circuit; Send alarm signals to technical personnel.

[0074] Optionally, determining the degree of loop voltage change based on the loop voltage value and the power supply voltage value includes: If the circuit breaker control circuit is a phase-separated circuit breaker control circuit, calculate the difference between the circuit voltage value and the power supply voltage value for each phase to obtain the phase-separated circuit difference. The degree of change in the circuit voltage of each phase is calculated by comparing the power supply voltage value with the phase difference of each phase's circuit.

[0075] Optionally, when an alarm is triggered based on a comparison between the circuit voltage change value and a preset circuit threshold, the alarm process includes: If the voltage change value of any phase of the circuit is greater than or equal to the preset circuit threshold, it is determined that there is an abnormality in the circuit breaker control circuit. Send alarm signals to technical personnel.

[0076] Optionally, the operation of determining the preset loop threshold includes: Collect a first voltage value and a second voltage value, and use the first voltage value and the second voltage value to calculate a preset circuit threshold, wherein the first voltage value is the voltage value of the power supply in the trip circuit under normal conditions, and the second voltage value is the voltage value of the circuit in the trip circuit under normal conditions; or; Collect the first resistance value and the second resistance value, and use the first resistance value and the second resistance value to calculate the preset circuit threshold. The first resistance value is the internal resistance value of the trip circuit monitoring relay, and the second resistance value is the resistance value of the entire trip circuit under normal conditions.

[0077] This invention also provides an anomaly handling system for a circuit breaker control circuit, see [link to documentation]. Figure 5 The diagram shows a structural schematic of an abnormal handling system for a circuit breaker control circuit according to an embodiment of the present invention.

[0078] As an example, the fault handling system of the circuit breaker control circuit may include: The circuit breaker operating box, the circuit breaker mechanism box, and the circuit breaker control circuit status monitoring device are provided. The circuit breaker operating box is connected to the circuit breaker mechanism box and the circuit breaker control circuit status monitoring device, respectively. The circuit breaker control circuit status monitoring device is applicable to the abnormal handling method of the circuit breaker control circuit described in the above embodiments.

[0079] Reference Figure 6 The diagram shows a schematic of the circuit breaker control circuit status monitoring device provided in an embodiment of the present invention.

[0080] The circuit breaker control circuit status monitoring device may include the following modules: The real-time voltage acquisition module acquires the real-time voltage values ​​of the control power supply and the trip circuit.

[0081] The voltage display and alarm module displays the real-time voltage of the control power supply and the real-time voltage of the trip circuit; it sets alarm lights for abnormal control power supply voltage, abnormal A-phase trip circuit or abnormal trip circuit, abnormal B-phase trip circuit, and abnormal C-phase trip circuit. When an alarm is triggered, the alarm lights are lit to provide an alarm notification.

[0082] The real-time calculation and judgment module calculates the degree of change in control power supply voltage and trip circuit voltage in real time, and compares them with their respective alarm threshold values ​​to determine whether to light up the alarm light and output an alarm signal.

[0083] The alarm signal output module can output alarm signals for abnormal control power supply voltage, abnormal A-phase trip circuit or abnormal trip circuit, abnormal B-phase trip circuit, and abnormal C-phase trip circuit. These alarm signals can be connected to the substation monitoring system to achieve remote monitoring.

[0084] Those skilled in the art will understand that, for ease of description and brevity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0085] Furthermore, this application also provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the abnormal handling method for the circuit breaker control circuit as described in the above embodiments.

[0086] Furthermore, embodiments of this application also provide a computer-readable storage medium storing a computer-executable program for causing a computer to execute the abnormal handling method for the circuit breaker control circuit as described in the above embodiments.

[0087] In the description of the embodiments of the present invention, it should be noted that the terms "above," "below," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. When an element such as a layer, region, or substrate is referred to as being "above" or "on top of" another element, it may be directly on the other element, or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" or "above" another element, there is no intermediate element. It should also be understood that when an element is referred to as being "below" or "under" another element, it may be directly below or under the other element, or there may be an intermediate element. Conversely, when an element is referred to as being "directly below" or "under" another element, there is no intermediate element. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] Those skilled in the art will understand that embodiments of this application may also include computer program products. Therefore, this application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0089] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), devices, and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0090] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0091] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0092] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of handling an abnormality in a control circuit of a circuit breaker, characterized by, The method comprises: respectively acquiring a power supply voltage value and a loop voltage value, wherein the power supply voltage value is a real-time voltage value of a control power supply, and the loop voltage value is a real-time voltage value between a trip loop and a positive electrical terminal of the control power supply; determining a power supply voltage variation degree value based on the power supply voltage value, and determining a loop voltage variation degree value based on the loop voltage value and the power supply voltage value; when it is determined that the circuit breaker control loop is abnormal according to a comparison result of the power supply voltage variation degree value and the power supply voltage value with a preset power supply threshold value, or when it is determined that the circuit breaker control loop is abnormal according to a comparison result of the loop voltage variation degree value with a preset loop threshold value, triggering an alarm processing; wherein the preset power supply threshold value and the preset loop threshold value are threshold values set according to circuit parameters collected when the circuit breaker control loop is in a normal state.

2. The abnormality processing method of a circuit breaker control circuit according to claim 1, characterized by, The method comprises: determining a power supply difference value of the power supply voltage value and a DC system rated voltage value; calculating the power supply voltage variation degree value by using the power supply difference value and the DC system rated voltage value.

3. The abnormality processing method of a circuit breaker control circuit according to claim 2, characterized by, The method comprises: if the power supply voltage variation degree value is greater than or equal to the preset power supply threshold value and the power supply voltage value is less than or equal to the DC system rated voltage, it is determined that the circuit breaker control loop is abnormal, wherein the preset power supply threshold value is a threshold value determined according to the DC system rated voltage and a preset power supply proportion value; outputting an alarm signal to a technician.

4. The abnormality processing method of a circuit breaker control circuit according to claim 1, characterized by, The method comprises: if the circuit breaker control loop is a three-phase circuit breaker control loop, calculating a difference value of the loop voltage value and the power supply voltage value to obtain a three-phase loop difference value; calculating the loop voltage variation degree value by using the three-phase loop difference value and the power supply voltage value.

5. The abnormality processing method of a circuit breaker control circuit according to claim 4, characterized by, The method comprises: if the loop voltage variation degree value is greater than or equal to the preset loop threshold value, it is determined that the circuit breaker control loop is abnormal; outputting an alarm signal to a technician.

6. The abnormality processing method of a circuit breaker control circuit according to claim 1, characterized by, The method comprises: if the circuit breaker control loop is a split-phase circuit breaker control loop, calculating a difference value of the loop voltage value and the power supply voltage value of each phase to obtain a split-phase loop difference value; calculating a loop voltage variation degree value of each phase by using the power supply voltage value and the split-phase loop difference value of each phase.

7. The abnormality processing method of a circuit breaker control circuit according to claim 6, characterized by, The method comprises: if the loop voltage variation degree value of any phase is greater than or equal to the preset loop threshold value, it is determined that the circuit breaker control loop is abnormal; outputting an alarm signal to a technician.

8. The abnormality processing method of a circuit breaker control circuit according to any one of claims 5 or 7, characterized by, The operation of determining the preset circuit threshold comprises: collecting a first voltage value and a second voltage value, and calculating a preset circuit threshold by using the first voltage value and the second voltage value, wherein the first voltage value is a voltage value of a power supply in a normal state of a tripping circuit, and the second voltage value is a voltage value of a circuit in the normal state of the tripping circuit; or; collecting a first resistance value and a second resistance value, and calculating a preset circuit threshold by using the first resistance value and the second resistance value, wherein the first resistance value is an internal resistance value of a monitoring relay of the tripping circuit, and the second resistance value is a resistance value of a full circuit of the tripping circuit in the normal state of the tripping circuit.

9. An abnormality processing device of a circuit breaker control circuit, characterized by comprising: The device comprises: an acquisition module, configured to acquire a power supply voltage value and a circuit voltage value respectively, wherein the power supply voltage value is a real-time voltage value of a control power supply, and the circuit voltage value is a real-time voltage value between a tripping circuit and a positive power supply terminal of the control power supply; a determination module, configured to determine a power supply voltage variation degree value based on the power supply voltage value, and determine a circuit voltage variation degree value based on the circuit voltage value and the power supply voltage value; a processing module, configured to trigger an alarm process when a circuit breaker control circuit is abnormal according to a comparison result of the power supply voltage variation degree value and a preset power supply threshold, or according to a comparison result of the circuit voltage variation degree value and a preset circuit threshold. The preset power supply threshold and the preset circuit threshold are threshold values set according to circuit parameters of the circuit breaker control circuit in a normal state.

10. An abnormality processing system of a circuit breaker control circuit, characterized by comprising: The system comprises a circuit breaker operating box, a circuit breaker mechanism box and a circuit breaker control circuit state monitoring device, the circuit breaker operating box is connected with the circuit breaker mechanism box and the circuit breaker control circuit state monitoring device respectively, and the circuit breaker control circuit state monitoring device is applicable to the abnormal processing method of the circuit breaker control circuit according to any one of claims 1-8.

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