Circuit breaker control loop trip warning system, method, device and related products

Abstract

The application relates to the technical field of power systems, and discloses a circuit breaker control loop stolen trip early warning system, method and device and related products; the system comprises: a ground potential signal acquisition module for acquiring the ground potential of a closing loop, an opening loop and a DC bus positive and negative pole; an insulation resistance signal acquisition module for acquiring the ground resistance; a capacitor discharge current signal acquisition module for acquiring the capacitor discharge current; a controller generates a ground fault judgment result according to the ground potential of the closing loop, the opening loop and the DC bus positive and negative pole by using a preset voltage threshold; generates an insulation damage fault judgment result according to the ground resistance; generates a capacitor discharge fault judgment result according to the capacitor discharge current; generates a fault recording trigger signal according to the three judgment results; a fault recording device receives the fault recording trigger signal, starts fault recording, and sends an early warning signal to store the recording result. The application can realize comprehensive, timely and automatic monitoring, early warning and tracing of the circuit breaker stolen trip fault.

Description

Technical Field

[0001] This application relates to the field of power system technology, and more specifically, to a circuit breaker control circuit anti-trigger system, method, device, and related products. Background Technology

[0002] Unplanned tripping, also known as unauthorized circuit breaker tripping, refers to the unplanned tripping of a circuit breaker due to mechanical failure, aging of secondary circuits, or accidental contact during maintenance, without any operational instructions from personnel or triggering of relay protection or automatic safety devices. This abnormal action directly disconnects normal power supply lines, leading to power outages and economic losses. In severe cases, it can also cause grid oscillations, equipment damage, and even personal safety risks. Therefore, effective monitoring and early warning systems for unauthorized tripping in secondary circuits are crucial for ensuring the safe, stable, and continuous operation of the power system, possessing significant technical value and economic benefits.

[0003] Currently, the industry generally uses manual troubleshooting to address secondary circuit tripping issues. When a tripping incident occurs, maintenance personnel must carry tools such as multimeters and insulation testers, relying on experience to systematically investigate the cause on-site. However, this manual approach has several drawbacks: First, it has poor response timeliness: tripping is often a transient phenomenon, and the fault state may have disappeared by the time manual investigation begins, leading to missed or misdiagnosed cases. Second, it has low accuracy: due to the lack of standardized criteria and automated data support, differences in experience among personnel can affect the judgment results, easily leading to misattribution of the fault to mechanical actions, interference, or other factors, making it difficult to accurately locate the true cause, and even resulting in misdiagnosis or missed diagnosis, causing repeated tripping of the same circuit. Finally, it is inefficient and costly: large-scale manual investigation after each tripping incident not only prolongs the power outage time but also increases manpower and maintenance costs, severely hindering the improvement of power supply reliability. Summary of the Invention

[0004] In view of the above situation, this application provides a circuit breaker control circuit tripping early warning system, method, device and related products, which aim to solve the above problems or at least partially solve the above problems.

[0005] In a first aspect, embodiments of this application provide a circuit breaker control circuit tripping early warning system, the system comprising: a ground potential signal acquisition module, an insulation resistance signal acquisition module, a capacitor discharge current signal acquisition module, a controller, and a fault recording device; The ground potential signal acquisition module is used to acquire the ground potential of the closing circuit, the opening circuit, and the DC bus of the target circuit breaker control circuit, and send them to the controller. The insulation resistance signal acquisition module is used to acquire the ground resistance of the target circuit breaker control circuit and send it to the controller; The capacitor discharge current signal acquisition module is used to acquire the capacitor discharge current of the target circuit breaker control circuit and send it to the controller; The controller is configured to generate a ground fault determination result based on the ground potential of the positive and negative terminals of the closing circuit, the positive and negative terminals of the opening circuit, and the DC bus using a preset voltage threshold; generate an insulation failure determination result based on the ground resistance of the target circuit breaker control circuit; generate a capacitor discharge failure determination result based on the capacitor discharge current; and generate a fault recording trigger signal based on the ground fault determination result, the insulation failure determination result, and the capacitor discharge failure determination result, and send it to the fault recording device. The fault recording device is used to receive the fault recording trigger signal, start fault recording and issue an early warning signal, and store the recording results.

[0006] Secondly, embodiments of this application also provide a method for early warning of unauthorized tripping of a circuit breaker control circuit, the method being deployed in the controller of the circuit breaker control circuit unauthorized tripping early warning system as described in the first aspect; the method includes: Obtain the ground potential of the closing circuit, the ground potential of the opening circuit, the ground potential of the DC bus, the ground resistance, and the capacitor discharge current of the target circuit breaker control circuit. Using a preset voltage threshold, a ground fault determination result is generated based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the opening circuit, and the ground potential of the DC bus. Based on the ground resistance of the target circuit breaker control circuit, an insulation failure fault determination result is generated; Based on the capacitor discharge current, a capacitor discharge fault determination result is generated; Based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, a fault recording trigger signal is generated and sent to the fault recording device, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

[0007] Thirdly, embodiments of this application also provide a circuit breaker control circuit tripping early warning device, the device being deployed in the controller of the circuit breaker control circuit tripping early warning system as described in the first aspect; the device includes: The acquisition module is used to acquire the ground potential of the closing circuit, the ground potential of the opening circuit, the ground potential of the DC bus, the ground resistance, and the capacitor discharge current of the control circuit of the target circuit breaker. The first determination module is used to generate a ground fault determination result based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the opening circuit, and the ground potential of the DC bus using a preset voltage threshold. The second determination module is used to generate an insulation failure determination result based on the ground resistance of the control circuit of the target circuit breaker. The third determination module is used to generate a capacitor discharge fault determination result based on the capacitor discharge current. The early warning module is used to generate a fault recording trigger signal and send it to the fault recording device based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

[0008] Fourthly, embodiments of this application also provide an electronic device, including: a processor; and a memory arranged to store computer-executable instructions, which, when executed, cause the processor to perform the steps of the circuit breaker control circuit tripping early warning method described above.

[0009] Fifthly, embodiments of this application also provide a computer-readable storage medium storing one or more programs, which, when executed by an electronic device including multiple applications, cause the electronic device to perform the steps of the circuit breaker control circuit tripping early warning method described above.

[0010] By employing the above technical solutions, the circuit breaker control circuit anti-tripping early warning system, method, device, and related products provided in this application embodiment can simultaneously collect multiple dimensions of electrical parameters such as circuit ground potential, ground resistance, and capacitor discharge current by configuring multiple dedicated acquisition modules. This comprehensively covers various core fault scenarios that cause anti-tripping. The collected data is uniformly summarized to the controller for automated logical judgment of grounding faults, insulation damage faults, and capacitor discharge faults. The controller then sends a trigger signal to activate the fault recording equipment to complete data recording and early warning output. This avoids the shortcomings of traditional manual troubleshooting, such as poor timeliness and low accuracy, as well as the incomplete scenario coverage and weak fault tracing of existing devices. Ultimately, this embodiment can achieve more comprehensive and timely anti-tripping fault monitoring and early warning capabilities and accurate tracing, reduce human judgment errors, shorten the fault troubleshooting cycle, reduce maintenance manpower costs, and effectively improve the operational stability of power secondary circuits and the overall power supply reliability.

[0011] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This paper shows a schematic diagram of the structure of the circuit breaker control circuit tripping early warning system provided in an embodiment of this application; Figure 2 A flowchart illustrating the circuit breaker control circuit tripping early warning method provided in an embodiment of this application is shown. Figure 3 This paper shows a schematic diagram of the structure of the circuit breaker control circuit tripping early warning device provided in an embodiment of this application; Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0015] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the term "comprising" and its variations should be interpreted as open-ended terms meaning "including but not limited to."

[0016] As mentioned earlier, the industry currently relies on manual investigation to address the issue of secondary circuit tripping. When a tripping incident occurs, maintenance personnel must carry tools such as multimeters and insulation testers, relying on experience to systematically investigate the cause of the tripping on-site. However, this manual approach has several drawbacks: First, it has poor response timeliness: tripping is often a transient phenomenon, and the fault state may have disappeared by the time manual investigation begins, leading to missed or misjudged cases. Second, it has low accuracy: due to the lack of standardized criteria and automated data support, differences in experience among personnel can affect the judgment results, easily leading to misattribution of the fault to mechanical actions, interference, or other factors, making it difficult to accurately locate the true cause, and even resulting in misjudgments or missed cases, causing repeated tripping of the same circuit. Finally, it is inefficient and costly: large-scale manual investigation after each tripping incident not only prolongs the power outage time but also increases manpower and maintenance costs, severely restricting the improvement of power supply reliability. Based on this, this invention proposes a circuit breaker control circuit tripping early warning system, method, device, and related products. The following detailed description of specific embodiments further illustrates this application.

[0017] Figure 1 This paper shows a schematic diagram of the structure of the circuit breaker control circuit tripping early warning system provided in an embodiment of this application. Figure 1 As can be seen, the circuit breaker control circuit tripping early warning system 100 provided in this application embodiment includes at least: a ground potential signal acquisition module 101, an insulation resistance signal acquisition module 102, a capacitor discharge current signal acquisition module 103, a controller 104, and a fault recording device 105; The ground potential signal acquisition module 101 is used to acquire the ground potential of the closing circuit, the opening circuit, and the DC bus of the target circuit breaker control circuit, and send them to the controller. The insulation resistance signal acquisition module 102 is used to acquire the ground resistance of the target circuit breaker control circuit and send it to the controller; The capacitor discharge current signal acquisition module 103 is used to acquire the capacitor discharge current of the target circuit breaker control circuit and send it to the controller. The controller 104 is used to generate a ground fault determination result based on the ground potential of the positive and negative terminals of the closing circuit, the positive and negative terminals of the opening circuit, and the DC bus using a preset voltage threshold; generate an insulation failure determination result based on the ground resistance of the target circuit breaker control circuit; generate a capacitor discharge failure determination result based on the capacitor discharge current; and generate a fault recording trigger signal based on the ground fault determination result, the insulation failure determination result, and the capacitor discharge failure determination result, and send it to the fault recording device. The fault recording device 105 is used to receive the fault recording trigger signal, start fault recording and issue an early warning signal, and store the recording results.

[0018] As can be seen, this application proposes a circuit breaker control circuit tripping early warning system based on fault recording function. This system uses multiple dedicated acquisition modules to simultaneously collect multi-dimensional electrical parameters such as circuit ground potential, ground resistance, and capacitor discharge current, comprehensively covering various core fault scenarios that cause tripping. The collected data is uniformly summarized to the controller for automated logical judgment of grounding faults, insulation damage faults, and capacitor discharge faults. The controller then sends a trigger signal to start the fault recording equipment to complete data recording and early warning output. This avoids the shortcomings of traditional manual inspection, such as poor timeliness and low accuracy, as well as the incomplete scenario coverage and weak fault tracing of existing devices. Ultimately, this embodiment can achieve more comprehensive and timely fault tripping monitoring and early warning capabilities and accurate tracing, reduce human judgment errors, shorten the fault investigation cycle, reduce maintenance manpower costs, and effectively improve the operational stability of power secondary circuits and the overall power supply reliability.

[0019] The structure of the circuit breaker control circuit tripping early warning system described above will be explained in detail below.

[0020] In the above system, the ground potential signal acquisition module 101 is used to acquire the ground potential of the closing circuit, the opening circuit, and the DC bus of the target circuit breaker control circuit, and send them to the controller. In practice, for example, a high-precision voltage sensor can be used for the ground potential signal acquisition module. In specific implementations, an operational amplifier can also be used to achieve signal filtering and amplification.

[0021] The insulation resistance signal acquisition module 102 is used to acquire the ground resistance of the control circuit of the target circuit breaker and send it to the controller. In practice, the insulation resistance signal acquisition module uses a high-frequency signal injection method: a high-frequency voltage signal is injected into the circuit while simultaneously detecting the leakage current caused by changes in insulation resistance. By measuring the injected voltage and response current, and combining this with the known line resistance and sensor internal resistance, the current ground insulation resistance value is calculated. This module sends the calculated resistance value to the controller to determine whether the insulation has deteriorated or is damaged.

[0022] The capacitor discharge current signal acquisition module 103 is used to acquire the capacitor discharge current of the target circuit breaker control circuit and send it to the controller. In specific implementations, for example, the capacitor discharge current signal acquisition module uses a current sensor, diode, and resistor to achieve real-time acquisition of the discharge current.

[0023] The controller 104 is used to generate a ground fault determination result based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the opening circuit, and the ground potential of the DC bus, using a preset voltage threshold.

[0024] In some embodiments, the preset voltage threshold includes a positive ground voltage threshold and a negative ground voltage threshold, and the controller is further configured to calculate the positive ground voltage threshold according to the following formula:

[0025] in, The positive grounding voltage threshold is... This indicates the input internal resistance of the voltage sensor. Indicates the critical value of grounding resistance. This indicates the rated DC voltage of the secondary DC system of the target circuit breaker control circuit; The negative grounding voltage threshold is the opposite of the positive grounding voltage threshold.

[0026] In this embodiment, the negative grounding voltage threshold is the opposite of the positive grounding voltage threshold, that is, the negative grounding voltage threshold is calculated according to the following formula:

[0027] in, This is the negative grounding voltage threshold.

[0028] In implementation, for example, the controller can read three fixed parameters from internal memory or a configuration file: the input internal resistance of the voltage sensor, the grounding resistance threshold, and the rated DC voltage of the secondary DC system. The controller then calculates the positive grounding voltage threshold according to the formula for calculating the positive grounding voltage threshold. Next, the controller takes the inverse of the positive grounding voltage threshold to obtain the negative grounding voltage threshold. Finally, the controller stores both thresholds in memory for subsequent grounding fault determination.

[0029] In practice, the controller first acquires the pre-calculated positive and negative grounding voltage thresholds. Then, it receives six point-to-ground potential signals in real time: the positive and negative grounding potentials of the closing circuit, the positive and negative grounding potentials of the opening circuit, the positive and negative grounding potentials of the DC bus, and the DC bus positive and negative grounding potentials. Next, the controller compares each positive grounding potential with the positive grounding voltage threshold: if any positive grounding potential is less than or equal to the threshold, it is determined to be a positive grounding fault. Simultaneously, it compares each negative grounding potential with the negative grounding voltage threshold: if any negative grounding potential is less than or equal to the threshold (i.e., greater than or equal to the absolute value of the threshold), it is determined to be a negative grounding fault. Finally, the controller outputs the grounding fault determination result based on the comparison results.

[0030] This embodiment calculates the positive grounding voltage threshold based on the rated voltage of the secondary DC system, the input internal resistance of the voltage sensor, and the critical value of the grounding resistance through the series voltage divider principle. This avoids the subjectivity of traditional empirical settings and achieves a precise match between the threshold and the actual operating conditions of the system. Subsequently, the negative grounding voltage threshold is set as the opposite of the positive grounding voltage threshold to ensure the symmetry of the positive and negative grounding criteria and eliminate the influence of bias error on the judgment result. Finally, this embodiment can obtain a more accurate and reliable grounding fault judgment result, improving the accuracy and stability of secondary circuit grounding fault identification.

[0031] The controller 104 also generates an insulation failure fault determination result based on the ground resistance of the target circuit breaker control circuit. In specific implementation, for example, firstly, the controller reads the following fixed parameters from its internal storage: the effective value of the output voltage of the high-frequency signal generator, the resistance of the conductor in the signal injection circuit, the internal resistance of the current sensor, and the effective value of the reference current. Then, the controller acquires the effective value of the current in the signal acquisition circuit in real time through the current sensor and reads it in after analog-to-digital conversion. Next, the controller calculates the current ground insulation resistance value of the target circuit breaker control circuit according to the following formula:

[0032] in, This refers to the insulation resistance value to ground of the target circuit breaker control circuit, i.e., the insulation resistance value between the positive busbar and the negative busbar. This is the output voltage of the high-frequency signal generator. The resistance of the wires in the signal injection loop, The internal resistance of the current sensor, The effective value of the current in the signal acquisition circuit. RMS value of reference current.

[0033] The controller then compares the calculated insulation resistance value with a preset insulation resistance threshold: if the real-time resistance value is less than or equal to the threshold, it is determined to be an insulation failure fault; otherwise, the insulation condition is determined to be normal. Finally, the controller outputs the insulation failure fault determination result.

[0034] In some embodiments, the controller 104 is further configured to: Calculate the insulation resistance decay rate based on the ground resistance at the previous and current moments. Based on the insulation resistance decay rate and the preset decay rate threshold, insulation damage early warning data is generated and added to the insulation damage fault determination result.

[0035] In this embodiment, the controller is also used to implement insulation failure early warning.

[0036] In practice, firstly, the controller reads the ground resistance stored in the previous moment and the ground resistance calculated at the current moment from memory, and simultaneously obtains the timestamps t-1 and t corresponding to these two moments, calculating the time difference Δt (usually a fixed sampling interval). Then, the insulation resistance attenuation rate is calculated according to the following formula:

[0037] in, The rate of decay of insulation resistance. This represents the insulation resistance value (resistance to ground) at the current moment. This is the insulation resistance value (resistance to ground) at the previous moment.

[0038] Next, the controller reads the preset decay rate threshold from its internal memory. and the calculated Compare with this threshold: If ≥ If so, insulation failure early warning data is generated (e.g., a Boolean warning flag is set to true, and the current attenuation rate value can be appended); if < If the insulation damage warning data is false, the controller will then add it as an additional field to the existing insulation damage fault determination result. Specifically, this can be achieved by defining a new data structure with two members: a fault determination flag (whether the insulation resistance is below the fault threshold) and a warning flag (whether the attenuation rate exceeds the limit), or by directly updating the determination result to an enumeration type (normal, fault, warning, fault and warning, etc.). Finally, the controller stores the updated insulation damage fault determination result in memory for use by subsequent logic (such as triggering waveform recording and generating alarms).

[0039] This embodiment calculates the insulation resistance decay rate by collecting the ground resistance at the previous and current moments, capturing the dynamic trend of insulation status changes. This avoids the lag of relying solely on a single insulation resistance value for judgment. Combined with a preset decay rate threshold, insulation damage early warning data is generated and added to the fault judgment result, thus identifying the development trend of insulation deterioration in advance and achieving early warning of potential hazards. Ultimately, this embodiment can obtain more accurate and timely insulation damage fault judgment and early warning results, effectively reducing the risk of accidental tripping caused by insulation damage.

[0040] The controller also generates a capacitor discharge fault determination result based on the capacitor discharge current. In some embodiments, when generating the capacitor discharge fault determination result based on the capacitor discharge current, the controller specifically performs the following: Based on the capacitor discharge current and current threshold, a capacitor discharge fault determination result is generated; The current threshold is calculated according to the following formula:

[0041] wherein, represents the current threshold value, represents the relay operating current.

[0042] In this embodiment, during specific implementation, for example, the controller reads the preset relay operating current value from the internal memory, calculates the current threshold according to the above formula, obtains a floating-point result and stores it in the memory. Then, the controller collects the discharge current of the capacitor discharge circuit in real time through a current sensor, and obtains the instantaneous value or peak value of the discharge current after analog-to-digital conversion. Next, the controller compares the collected peak discharge current with the calculated current threshold: if the peak discharge current ≥ the current threshold, it is determined that there is a capacitor discharge fault, and a Boolean fault flag is generated (for example, set to true); if the peak discharge current < the current threshold, it is determined that there is no capacitor discharge fault (the flag is set to false). Finally, the controller outputs the determination result of the capacitor discharge fault for subsequent logic (such as triggering waveform recording and generating an alarm) to use.

[0043] In some embodiments, the resistance value of the current-limiting resistor in the capacitor discharge circuit of the target circuit breaker control loop satisfies the following formula:

[0044] wherein, is the resistance value of the current-limiting resistor, represents the rated DC voltage of the secondary DC system of the target circuit breaker control loop, is the rated current of the MOS transistor.

[0045] This embodiment combines the rated DC voltage of the secondary DC system supporting the target circuit breaker control loop and the rated current of the MOS transistor as basic parameters to define the lower limit of the resistance value of the current-limiting resistor. Relying on the electrical rated parameters for quantitative matching to replace the traditional empirical selection method can make the selected resistor adapt to the electrical working conditions of the capacitor discharge circuit and form overload protection for the power devices at the same time; finally, this embodiment can obtain a more standardized and reasonable resistor selection standard, realize the function of current-limiting and arc suppression, and avoid problems such as overload damage of devices and misoperation or unauthorized tripping of the circuit breaker control loop.

[0046] The controller generates a fault waveform recording trigger signal according to the ground fault determination result, the insulation breakage fault determination result, and the capacitor discharge fault determination result, and sends it to the fault waveform recording device.

[0047] In some embodiments, when the controller generates a fault waveform recording trigger signal according to the ground fault determination result, the insulation breakage fault determination result, and the capacitor discharge fault determination result, it is specifically used for: If the grounding fault determination result is that a grounding fault exists, or the insulation damage fault determination result is that an insulation damage fault exists, or the capacitor discharge fault determination result is that a capacitor discharge fault exists, then a fault recording trigger signal is generated.

[0048] In this embodiment, during implementation, firstly, the three judgment results—grounding fault judgment result, insulation damage fault judgment result, and capacitor discharge fault judgment result—are all Boolean logic values ​​(true indicates a fault has occurred, false indicates no fault). Then, the controller performs a logical OR operation: the three Boolean values ​​are ORed; if any one judgment result is true, the OR operation result is true; only when all three are false is the result false. Next, the controller generates a fault recording trigger signal based on the OR operation result: if the result is true, a high-level active or rising-edge triggered digital trigger signal is generated; if the result is false, a low-level or no trigger signal is generated. Finally, the controller sends this trigger signal to the fault recording device through its digital output interface (such as a general-purpose input / output port, serial communication interface, or dedicated trigger port), and optionally records the trigger time and trigger reason (such as the specific type of fault that triggered the recording) for subsequent fault analysis.

[0049] In other embodiments, if the insulation failure fault determination result includes insulation failure warning data, when the controller performs logical operations to generate a fault recording trigger signal, it not only performs logical OR judgment on the fault status of the grounding fault determination result, the insulation failure fault determination result, and the capacitor discharge fault determination result, but also includes the insulation failure warning data included in the insulation failure fault determination result in the trigger determination scope. When any type of fault determination result determines that a fault has occurred, or the insulation failure warning data indicates that insulation failure is imminent, the trigger condition is determined to be met and a fault recording trigger signal is generated. Only when there are no abnormalities in the three types of faults and the insulation status does not trigger a warning will no trigger signal be generated. At the same time, the trigger reason is marked synchronously when triggering the recording.

[0050] The fault recording device 105 receives the fault recording trigger signal, starts fault recording, and issues an early warning signal. It collects various monitoring signals (ground potential signal, ground resistance, and capacitor discharge current of the target circuit breaker control circuit) in real time, stores the recording results, and ensures the authenticity and integrity of the fault recording data, providing reliable data support for fault tracing. Here, when the controller determines a fault and generates a recording trigger signal to send to the fault recording device, it simultaneously forwards all its cached raw data on ground potential, insulation resistance, and capacitor discharge current to the fault recording device. After receiving the trigger command, the fault recording device directly reads the signal data forwarded by the controller to complete the recording and storage.

[0051] Warning signals may include, for example, the indicator light illuminating on a fault recording device.

[0052] In practical implementation, the formula for calculating the waveform sampling rate is as follows:

[0053] in, For waveform sampling rate, To monitor the highest frequency of the signal.

[0054] In summary, this application provides a secondary circuit anti-tampering protection system for closing and opening circuits that combines fault recording function. It addresses scenarios such as short circuits due to circuit insulation damage or relay operation caused by capacitor discharge triggered by circuit grounding. Simultaneously, it records transient data before and after the fault, achieving precise protection and traceability against tampering faults. Furthermore, it clarifies the practical implementation steps and core parameter calculation formulas for each core module, providing clear guidance for on-site deployment, parameter configuration, and stable operation of the device, ensuring the stable operation of the power system.

[0055] This application also provides a method for early warning of unauthorized tripping of circuit breaker control circuits, wherein the method is deployed in the controller of the circuit breaker control circuit unauthorized tripping early warning system provided in any of the above embodiments. Figure 2 This diagram illustrates a flowchart of a circuit breaker control circuit anti-trigger method according to an embodiment of the present disclosure. Figure 2 As can be seen, this embodiment includes the following steps S201-S205: Step S201: Obtain the ground potential of the closing circuit, the ground potential of the opening circuit, the ground potential of the DC bus, the ground resistance, and the capacitor discharge current of the target circuit breaker control circuit. Step S202: Using a preset voltage threshold, generate a ground fault determination result based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the positive and negative poles of the opening circuit, and the ground potential of the positive and negative poles of the DC bus. Step S203: Generate an insulation failure fault determination result based on the ground resistance of the target circuit breaker control circuit; Step S204: Generate a capacitor discharge fault determination result based on the capacitor discharge current; Step S205: Based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, generate a fault recording trigger signal and send it to the fault recording device, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

[0056] Those skilled in the art will understand that in the above-described method of the specific embodiments, the order in which the steps are written does not imply a strict execution order, but constitutes no limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0057] It should be noted that in practical applications, all the above-described possible implementation methods can be combined in any way to form possible embodiments of this application, and will not be described in detail here. The information (including but not limited to device information, user information, etc.) and data (including but not limited to data used for analysis, storage, and display) involved in this application are all information and data authorized by the user or fully authorized by all parties. The software tools or components appearing in the embodiments of this application are merely illustrative examples and do not represent actual use.

[0058] Based on the same concept, this application also provides a circuit breaker control circuit unauthorized tripping early warning device, which corresponds one-to-one with the circuit breaker control circuit unauthorized tripping early warning method in the above embodiments. The device is deployed in the controller of the circuit breaker control circuit unauthorized tripping early warning system provided in any of the above embodiments. Figure 3 A schematic diagram of the circuit breaker control circuit tripping early warning device provided in this application embodiment is shown. See also: Figure 3 As shown, the circuit breaker control circuit tripping early warning device 300 provided in this application embodiment includes: The acquisition module 301 is used to acquire the ground potential of the closing circuit positive and negative poles, the ground potential of the opening circuit positive and negative poles, the ground potential of the DC bus positive and negative poles, the ground resistance, and the capacitor discharge current of the target circuit breaker control circuit. The first determination module 302 is used to generate a ground fault determination result based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the opening circuit, and the ground potential of the DC bus using a preset voltage threshold. The second determination module 303 is used to generate an insulation failure determination result based on the ground resistance of the control circuit of the target circuit breaker. The third determination module 304 is used to generate a capacitor discharge fault determination result based on the capacitor discharge current. The early warning module 305 is used to generate a fault recording trigger signal and send it to the fault recording device based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

[0059] Specific limitations regarding the circuit breaker control circuit tripping warning device can be found in the above-mentioned limitations on the circuit breaker control circuit tripping warning method, and will not be repeated here. Each module in the aforementioned circuit breaker control circuit tripping warning device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0060] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Figure 4 As shown, at the hardware level, this electronic device includes a processor, and optionally also includes an internal bus, a network interface, and memory. The memory may include main memory, such as high-speed random-access memory (RAM), or it may include non-volatile memory, such as at least one disk drive. Of course, this electronic device may also include other hardware required for other business operations.

[0061] The processor, network interface, and memory can be interconnected via an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0062] Memory is used to store programs. Specifically, programs may include program code, which includes computer operation instructions. Memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0063] The processor reads the corresponding computer program from non-volatile memory into main memory and then runs it, forming a circuit breaker control loop anti-trigger device at the logical level. The processor executes the program stored in memory and specifically performs the aforementioned method.

[0064] The processor may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0065] This electronic device can execute the circuit breaker control circuit tripping early warning method provided in several embodiments of this application, and realize the circuit breaker control circuit tripping early warning device in... Figure 3 The functions of the embodiments shown are not described again in this application.

[0066] This application also proposes a computer-readable storage medium that stores one or more programs, the programs including instructions that, when executed by an electronic device including multiple applications, enable the electronic device to perform the circuit breaker control circuit tripping early warning method provided in several embodiments of this application.

[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can 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.

[0068] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), 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.

[0069] 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.

[0070] 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.

[0071] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0072] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0073] Computer-readable media include both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can 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.

[0076] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A circuit breaker control circuit tripping early warning system, characterized in that, The system includes: a ground potential signal acquisition module, an insulation resistance signal acquisition module, a capacitor discharge current signal acquisition module, a controller, and a fault recording device; The ground potential signal acquisition module is used to acquire the ground potential of the closing circuit, the opening circuit, and the DC bus of the target circuit breaker control circuit, and send them to the controller. The insulation resistance signal acquisition module is used to acquire the ground resistance of the target circuit breaker control circuit and send it to the controller; The capacitor discharge current signal acquisition module is used to acquire the capacitor discharge current of the target circuit breaker control circuit and send it to the controller; The controller is configured to generate a ground fault determination result based on the ground potential of the positive and negative terminals of the closing circuit, the positive and negative terminals of the opening circuit, and the DC bus using a preset voltage threshold; generate an insulation failure determination result based on the ground resistance of the target circuit breaker control circuit; generate a capacitor discharge failure determination result based on the capacitor discharge current; and generate a fault recording trigger signal based on the ground fault determination result, the insulation failure determination result, and the capacitor discharge failure determination result, and send it to the fault recording device. The fault recording device is used to receive the fault recording trigger signal, start fault recording and issue an early warning signal, and store the recording results.

2. The circuit breaker control circuit tripping early warning system according to claim 1, characterized in that, The preset voltage threshold includes a positive ground voltage threshold and a negative ground voltage threshold, and the controller is further configured to calculate the positive ground voltage threshold according to the following formula: in, The positive grounding voltage threshold is... This indicates the input internal resistance of the voltage sensor. Indicates the critical value of grounding resistance. This indicates the rated DC voltage of the secondary DC system of the target circuit breaker control circuit; The negative grounding voltage threshold is the opposite of the positive grounding voltage threshold.

3. The circuit breaker control circuit tripping early warning system according to claim 1, characterized in that, The controller is also used for: Calculate the insulation resistance decay rate based on the ground resistance at the previous and current moments. Based on the insulation resistance decay rate and the preset decay rate threshold, insulation damage early warning data is generated and added to the insulation damage fault determination result.

4. The circuit breaker control circuit tripping early warning system according to claim 1, characterized in that, When the controller generates a capacitor discharge fault determination result based on the capacitor discharge current, it is specifically used for: Based on the capacitor discharge current and current threshold, a capacitor discharge fault determination result is generated; The current threshold is calculated according to the following formula: in, This indicates the current threshold. This indicates the relay operating current.

5. The circuit breaker control circuit tripping early warning system according to claim 1, characterized in that, The resistance value of the current-limiting resistor in the capacitor discharge circuit of the target circuit breaker control circuit satisfies the following formula: in, This is the resistance value of the current-limiting resistor. This indicates the rated DC voltage of the secondary DC system of the target circuit breaker control circuit. This is the rated current of the MOSFET.

6. The circuit breaker control circuit tripping early warning system according to claim 1, characterized in that, When the controller generates a fault recording trigger signal based on the ground fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, it is specifically used for: If the grounding fault determination result is that a grounding fault exists, or the insulation damage fault determination result is that an insulation damage fault exists, or the capacitor discharge fault determination result is that a capacitor discharge fault exists, then a fault recording trigger signal is generated.

7. A method for early warning of unauthorized tripping in a circuit breaker control circuit, characterized in that, The method is deployed in the controller of a circuit breaker control circuit tripping early warning system as described in any of claims 1-6; the method includes: Obtain the ground potential of the closing circuit, the ground potential of the opening circuit, the ground potential of the DC bus, the ground resistance, and the capacitor discharge current of the target circuit breaker control circuit. Using a preset voltage threshold, a ground fault determination result is generated based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the positive and negative poles of the opening circuit, and the ground potential of the positive and negative poles of the DC bus. Based on the ground resistance of the target circuit breaker control circuit, an insulation failure fault determination result is generated; Based on the capacitor discharge current, a capacitor discharge fault determination result is generated; Based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, a fault recording trigger signal is generated and sent to the fault recording device, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

8. A circuit breaker control circuit anti-trigger device, characterized in that, The device is deployed in the controller of the circuit breaker control circuit tripping early warning system as described in any of claims 1-6; the device includes: The acquisition module is used to acquire the ground potential of the closing circuit, the ground potential of the opening circuit, the ground potential of the DC bus, the ground resistance, and the capacitor discharge current of the control circuit of the target circuit breaker. The first determination module is used to generate a ground fault determination result based on the ground potential of the positive and negative poles of the closing circuit, the ground potential of the opening circuit, and the ground potential of the DC bus, using a preset voltage threshold. The second determination module is used to generate an insulation failure determination result based on the ground resistance of the control circuit of the target circuit breaker. The third determination module is used to generate a capacitor discharge fault determination result based on the capacitor discharge current. The early warning module is used to generate a fault recording trigger signal and send it to the fault recording device based on the grounding fault determination result, the insulation damage fault determination result, and the capacitor discharge fault determination result, so that the fault recording device can start fault recording and issue an early warning signal, and store the recording result.

9. An electronic device, comprising: processor; And a memory arranged to store computer-executable instructions, characterized in that, when executed, the executable instructions cause the processor to perform the steps of the circuit breaker control circuit tripping early warning method as described in claim 7.

10. A computer-readable storage medium storing one or more programs, characterized in that, When the one or more programs are executed by an electronic device including multiple applications, the electronic device performs the steps of the circuit breaker control circuit tripping early warning method as described in claim 7.

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