A simulated circuit breaker and power system

Abstract

The present application discloses a simulated circuit breaker and a power system, which relate to the technical field of circuit breakers and include a plurality of signal interfaces, each of which corresponds to a different protocol. Different interfaces are connected to devices with different protocols. A control module can obtain an interface identifier of the signal interface to which the signal line is connected, and determine a protocol matching the interface identifier based on the interface identifier. According to the protocol matching the interface identifier, the control module identifies a data signal transmitted by the signal line and sends a control instruction to a switch module. The switch module performs opening and closing actions based on the control instruction. Even if the protocols of the new device and the old device are inconsistent, compatibility between the new and old devices can be achieved. The detection module can detect its own faults and prompt the detection results. In this way, it can be known in advance whether the simulated circuit breaker itself has a fault, thereby avoiding maintenance and repair work when there is a fault in itself, reducing misjudgment of related faults, and improving maintenance and repair efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a simulated circuit breaker and a power system. Background Art

[0002] A simulated circuit breaker, also known as a simulated switch, is a device used in power systems to simulate the operation of a real circuit breaker. Its primary function is to replace the actual circuit breaker or switch during transmission, protection, or switching tests, thereby avoiding the negative effects of real circuit breaker or switch operation. For example, in power and electrical maintenance and overhaul scenarios, repeated tripping and closing of circuit breakers is required, which can cause wear and tear on real circuit breakers, shortening their lifespan.

[0003] Currently, the power grid is home to both new and legacy equipment, each with different protocols. Consequently, maintenance personnel are required to carry multiple types of simulated circuit breakers for each device, increasing their workload. Furthermore, if the simulated circuit breakers themselves have problems, subsequent maintenance and inspection work can be negatively impacted, leading to misdiagnosis of related faults and reduced maintenance efficiency. Summary of the Invention

[0004] The present application provides a simulated circuit breaker and power system that can be applied to new and old equipment with different protocols, and can realize fault self-diagnosis, thereby improving the accuracy of fault location and further improving the efficiency of maintenance and repair.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a simulated circuit breaker, comprising:

[0007] A plurality of signal interfaces, for connecting at least one signal line; wherein each of the plurality of signal interfaces corresponds to a different protocol;

[0008] a control module, configured to obtain an interface identifier of a signal interface to which the signal line is connected, determine a protocol matching the interface identifier based on the interface identifier, identify a data signal transmitted by the signal line based on the protocol matching the interface identifier, and send a control instruction to a switch module;

[0009] A switch module, configured to receive the control instruction and perform an opening action or a closing action according to the control instruction;

[0010] The detection module is used to detect its own faults and prompt the detection results.

[0011] Optionally, the detection module is specifically configured to:

[0012] Acquire transient current signals and transient voltage signals of the simulated circuit breaker during the opening and closing process, acquire vibration acceleration signals of the action mechanism of the simulated circuit breaker, acquire contact resistance and contact area temperature field distribution of the simulated circuit breaker, and acquire ultrasonic signals generated by arc discharge of the simulated circuit breaker;

[0013] The self-fault is detected according to the transient current signal, the transient voltage signal, the vibration acceleration signal, the contact resistance, the temperature field distribution in the contact area and the ultrasonic signal.

[0014] Optionally, the detection module is specifically configured to:

[0015] Generate a first impact factor based on the transient current signal and the transient voltage signal; generate a second impact factor based on the contact resistance and the temperature field distribution of the contact area; generate a third impact factor based on the vibration acceleration signal and the ultrasonic signal;

[0016] generating a risk index according to the first influencing factor, the second influencing factor, and the third influencing factor;

[0017] If the risk index is greater than or equal to the risk threshold, it is determined that the simulated circuit breaker is faulty.

[0018] Optionally, the detection module is specifically configured to generate the first impact factor in the following manner:

[0019]

[0020]

[0021] in, represents the first impact factor, represents the arc energy, Indicates the first critical value of arc energy, Indicates the second critical value of arc energy, represents the first coefficient, Represents the transient voltage signal, Represents the transient current signal, Indicates the starting moment of transient voltage signal or transient current signal, Indicates the termination moment of transient voltage signal or transient current signal;

[0022] The second impact factor is generated by:

[0023]

[0024] in, The second impact factor is Indicates the change in contact resistance per unit time. Indicates the temperature change of the contact area per unit time, Determined by the temperature field distribution in the contact area, Indicates the contact resistance of the contact, Indicates the threshold value of contact resistance, is the second coefficient, is the threshold value of the rate of change of resistance with temperature;

[0025] The third impact factor is generated by:

[0026]

[0027]

[0028]

[0029] in, represents the third impact factor, Represents the weighted score of vibration acceleration signal and ultrasonic signal, represents the minimum threshold of the weighted score, represents the maximum value threshold of the weighted score, represents the first weight, represents the second weight, represents the demodulated amplitude of the vibration signal in the i-th direction at the t-th time, represents the basic amplitude of the demodulated vibration signal in the i-th direction, Indicates ultrasonic signal, Indicates the standard arc signal, express and Dynamic Time Warping values ​​between .

[0030] Optionally, the detection module is specifically configured to generate a risk index using the following formula:

[0031]

[0032] in, represents the risk index, represents the third weight, represents the first impact factor, represents the fourth weight, represents the second impact factor, represents the fifth weight, Indicates the third impact factor.

[0033] Optionally, the risk threshold is updated using the following formula:

[0034]

[0035] in, represents the risk threshold of the jth round, represents the risk threshold of the j-1th round, is the aging coefficient, represents the interference coefficient, Represents the health index of the h-th sensor.

[0036] Optionally, the detection module is further configured to determine that there is no fault in the simulated circuit breaker if the risk index is less than a risk threshold.

[0037] Optionally, the switch types of the simulated circuit breaker include spring switches and permanent magnet switches.

[0038] Optionally, the housing of the simulated circuit breaker is a stainless steel spray-coated or plastic shell.

[0039] In a second aspect, the present application provides a power system, comprising a feeder terminal and a simulated circuit breaker as described in any one of the first aspects;

[0040] The feeder terminal is used to send a data signal to the simulated circuit breaker;

[0041] The simulated circuit breaker is used to receive the data signal.

[0042] It can be seen from the above technical solution that this application has at least the following beneficial effects:

[0043] The simulated circuit breaker provided in the present application includes multiple signal interfaces, and the protocols corresponding to each of the multiple signal interfaces are different. Different interfaces are connected to devices with different protocols. The control module can obtain the interface identifier of the signal interface to which the signal line is connected, and determine the protocol matching the interface identifier based on the interface identifier. According to the protocol matching the interface identifier, the data signal transmitted by the signal line is identified, and a control instruction is sent to the switch module. The switch module performs an opening action or a closing action based on the control instruction, so that even if the protocols of the new device and the old device are inconsistent, compatibility between the new and old devices can be achieved; the simulated circuit breaker should include a detection module, which can detect its own faults and prompt the detection results. In this way, it can be known in advance whether the simulated circuit breaker itself has a fault, thereby avoiding maintenance and repair work when there is a fault in itself, reducing misjudgment of related faults, and improving maintenance and repair efficiency.

[0044] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A physical schematic diagram of a simulated circuit breaker provided in an embodiment of the present application;

[0046] Figure 2 A schematic structural diagram of a simulated circuit breaker provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of protocol identification provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of another protocol identification provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of a spring switch provided in an embodiment of the present application;

[0050] Figure 6 A schematic diagram of a permanent magnet switch provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The terms "first", "second" and "third" in this application specification and the accompanying drawings are used to distinguish different objects rather than to limit a specific order.

[0052] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0053] To make the description of the following embodiments clear and concise, a brief introduction to the related technologies is first given:

[0054] Currently, feeder terminal units (FTUs), which serve as the control terminals for pole-mounted switches, are unable to directly remotely open and close pole-mounted circuit breakers on normally operating 10kV distribution lines during telemetry, telesignaling, and remote testing, particularly remote testing. Newly commissioned or field-replaced terminal equipment cannot be centrally commissioned and built concurrently with primary equipment without power outages. During normal operation, FTUs, whether newly commissioned or removed from a field fault, cannot directly remotely close or open circuit breakers during commissioning. Existing conditions preclude pre-installation commissioning of FTUs without power outages. A device is needed to enable pre-installation commissioning of FTUs and simulate remote control of circuit breakers. Furthermore, if the simulated circuit breaker itself exhibits a fault, subsequent maintenance and repair work will be negatively impacted. For example, if the distribution network is faulty but the simulated circuit breaker itself exhibits a fault, the test results will be inaccurate.

[0055] In view of this, an embodiment of the present application provides a simulated circuit breaker, which includes multiple signal interfaces, and the protocols corresponding to each of the multiple signal interfaces are different. For devices with different protocols, different interfaces are connected. The control module can obtain the interface identifier of the signal interface to which the signal line is connected, and determine the protocol matching the interface identifier according to the interface identifier. According to the protocol matching the interface identifier, the data signal transmitted by the signal line is identified, and a control instruction is sent to the switch module. The switch module performs an opening action or a closing action based on the control instruction, so that even if the protocols of the new device and the old device are inconsistent, compatibility between the new and old devices can be achieved; the simulated circuit breaker should include a detection module, which can detect its own faults and prompt the detection results. In this way, it can be known in advance whether the simulated circuit breaker itself has a fault, thereby avoiding maintenance and repair work when there is a fault in itself, reducing misjudgment of related faults, and improving maintenance and repair efficiency.

[0056] like Figure 1 As shown in the figure, this figure is a physical schematic diagram of a simulated circuit breaker provided in an embodiment of the present application. It can be seen from the figure that the multiple signal interfaces of the simulated circuit breaker include three signal interfaces, so that the simulated circuit breaker can adapt to at least three devices with different protocols.

[0057] like Figure 2 As shown in FIG, this figure is a structural diagram of a simulated circuit breaker provided in an embodiment of the present application. The simulated circuit breaker includes a control module 202 , a switch module 203 , a detection module 204 and multiple signal interfaces 201 .

[0058] Among them, multiple signal interfaces 201 are used to connect at least one signal line; wherein, the protocol corresponding to each of the multiple signal interfaces is different; the control module 202 is used to obtain the interface identifier of the signal interface to which the signal line is connected, and determine the protocol matching the interface identifier according to the interface identifier, and identify the data signal transmitted by the signal line according to the protocol matching the interface identifier, and send a control instruction to the switch module; the switch module 203 is used to receive the control instruction and perform an opening action or a closing action according to the control instruction; the detection module 204 is used to detect its own fault and prompt the detection result.

[0059] In some examples, the multiple signal interfaces 201 may include a first signal interface 201a, a second signal interface 201b, and a third signal interface 201c, wherein the first signal interface 201a corresponds to the first protocol, the second signal interface 201b corresponds to the second protocol, and the third signal interface 201c corresponds to the third protocol. For example, when a connection is required with a device using the first protocol, the connection is made through the first signal interface 201a; when a connection is required with a device using the second protocol, the connection is made through the second signal interface 201b; and when a connection is required with a device using the third protocol, the connection is made through the third signal interface 201c. In this way, the simulated circuit breaker provided in the embodiments of the present application is compatible with both new and old devices.

[0060] The control module 202 is used to obtain the interface identifier of the signal interface to which the signal connector is connected, and determine the protocol that matches the interface identifier based on the interface identifier. For example, after the signal connector is connected to the signal interface, an interface signal will be triggered. The control module 202 can obtain the interface signal and then, based on the interface identifier carried in the interface signal and the mapping relationship between the pre-calibrated reference interface identifier and the reference protocol, determine the protocol corresponding to the interface identifier. Different protocols have different corresponding identification methods. The control module 202 may not identify the data signal transmitted by the signal line based on the protocol that matches the interface identifier and send a control instruction to the switch module.

[0061] like Figure 3 As shown in FIG, this figure is a schematic diagram of a protocol identification provided by an embodiment of the present application. Figure 4 As shown in FIG, this figure is a schematic diagram of another protocol identification provided by an embodiment of the present application. Figure 3 and Figure 4 It can be seen that the protocols between different signal interfaces are different.

[0062] The switch module 203 is used to receive control instructions and then perform opening or closing actions based on the control instructions. The control instructions can be instructions for opening or closing the circuit breaker. By conducting tests on simulated circuit breakers, the number of tripping and closing times of a real circuit breaker can be reduced, extending its service life.

[0063] The detection module 204 is used to detect its own faults and prompt the detection results.

[0064] In some embodiments, the detection module 204 can obtain transient current signals and transient voltage signals of the simulated circuit breaker during the opening and closing process, obtain the vibration acceleration signal of the action mechanism of the simulated circuit breaker, obtain the contact resistance and the contact area temperature field distribution of the simulated circuit breaker, and obtain the ultrasonic signal generated by the arc discharge of the simulated circuit breaker; and detect its own faults based on the transient current signal, the transient voltage signal, the vibration acceleration signal, the contact resistance, the contact area temperature field distribution and the ultrasonic signal.

[0065] A Rogowski coil and a high-frequency voltage transformer (100kHz-1MHz bandwidth) can be used to synchronously collect transient current signals (I(t)) and transient voltage signals (U(t)) during the simulated circuit breaker opening and closing process. A triaxial accelerometer (500Hz-10kHz bandwidth) can be installed on the simulated circuit breaker operating mechanism to obtain vibration acceleration signals. A low-frequency signal (100Hz) is injected through a constant current source to measure the voltage drop ΔU across the contacts and calculate the contact resistance R. An uncooled infrared camera (8-14µm band) is used to synchronously collect the temperature field distribution T(x,y,t) in the contact area. An ultrasonic sensor (50kHz-200kHz bandwidth) is installed on the surface of the arc extinguishing chamber to capture the ultrasonic signal S(t) generated by the arc discharge.

[0066] In this embodiment, by simultaneously acquiring electrical signals (transient current / voltage, contact resistance), mechanical signals (vibration acceleration, ultrasonic waves), and thermal signals (temperature field distribution), a comprehensive assessment of the circuit breaker's mechanical performance, contact status, and arc characteristics is achieved, avoiding the one-sided nature of single-parameter analysis. Increased contact resistance can predict contact wear or oxidation, abnormal vibration acceleration indicates mechanical jamming or spring fatigue, sudden changes in arc ultrasonic signals can warn of insulation breakdown risks, and abnormal temperature field distribution indicates poor contact or heat dissipation failures. Real-time monitoring of these parameters can proactively identify potential hazards and prevent unexpected accidents. Transient current waveform distortion locates arc reignition locations, vibration signal spectrum analysis identifies specific mechanical component faults, and temperature field gradient changes pinpoint localized contact overheating areas. Multi-signal fusion can correlate fault types (such as contact erosion, spring failure, and insulation aging) with specific components. By building a multi-dimensional "electrical-mechanical-thermal-acoustic" sensing system, this solution provides a comprehensive picture of the simulated circuit breaker's health, significantly improving equipment lifecycle management while ensuring safe power system operation.

[0067] The detection module 204 may generate a first impact factor based on the transient current signal and the transient voltage signal. Specifically, the detection module 204 may calculate the first impact factor based on the following formula:

[0068]

[0069]

[0070] in, represents the first impact factor, represents the arc energy, Indicates the first critical value of arc energy, Indicates the second critical value of arc energy, represents the first coefficient, Represents the transient voltage signal, Represents the transient current signal, Indicates the starting moment of transient voltage signal or transient current signal, Indicates the termination moment of transient voltage signal or transient current signal.

[0071] The detection module 204 may generate a second impact factor based on the contact resistance and the contact area temperature field distribution. Specifically, the detection module 204 may calculate the second impact factor based on the following formula:

[0072]

[0073] in, The second impact factor is Indicates the change in contact resistance per unit time. Indicates the temperature change of the contact area per unit time, Determined by the temperature field distribution in the contact area, Indicates the contact resistance of the contact, Indicates the threshold value of contact resistance, is the second coefficient, is the threshold value of the rate of change of resistance with temperature.

[0074] The detection module 204 may generate a third impact factor based on the vibration acceleration signal and the ultrasonic signal. Specifically, the detection module 204 may calculate the third impact factor based on the following formula:

[0075]

[0076]

[0077]

[0078] in, represents the third impact factor, Represents the weighted score of vibration acceleration signal and ultrasonic signal, represents the minimum threshold of the weighted score, Indicates the maximum value threshold of the weighted score, represents the first weight, represents the second weight, represents the demodulated amplitude of the vibration signal in the i-th direction at the t-th time, Indicates the basic amplitude of the demodulated vibration signal in the i-th direction. The three directions can be x, y and z directions. Indicates ultrasonic signal, Indicates the standard arc signal, express and Dynamic Time Warping values ​​between .

[0079] Then, the inspection module 204 generates a risk index based on the first influencing factor, the second influencing factor, and the third influencing factor. Specifically, the inspection module 204 can calculate the risk index based on the following formula:

[0080]

[0081] in, represents the risk index, represents the third weight, represents the first impact factor, represents the fourth weight, represents the second impact factor, represents the fifth weight, Indicates the third impact factor. .

[0082] After obtaining the risk index, the detection module 204 can determine whether the simulated circuit breaker itself has a fault based on the risk index. If the risk index is greater than or equal to the risk threshold, it is determined that the simulated circuit breaker has a fault. If the risk index is less than the risk threshold, it is determined that the simulated circuit breaker does not have a fault.

[0083] In this embodiment, comprehensive monitoring of the circuit breaker's status is achieved by combining the characteristics of three physical domains: electrical (transient current / voltage), thermal (contact resistance / temperature field), and mechanical (vibration / ultrasound). This covers key fault-causing factors, including contact performance, thermal stability, and mechanical structural integrity. Transient signal analysis can capture transient anomalies such as contact bounce and arc reignition; temperature field and contact resistance monitoring can proactively detect localized temperature rises caused by contact oxidation and loosening; and vibration and ultrasonic signals can identify hidden dangers such as mechanical wear, looseness, or internal discharge, providing early warning of faults. Multi-source data fusion (such as weighted synthesis, fuzzy logic, or machine learning algorithms) generates a risk index, reducing the risk of misjudgment based on a single parameter and significantly improving the accuracy and robustness of fault diagnosis.

[0084] In some embodiments, the risk threshold may be updated periodically. Specifically, the risk threshold is updated using the following formula:

[0085]

[0086] in, represents the risk threshold of the jth round, represents the risk threshold of the j-1th round, is the aging coefficient, represents the interference coefficient, Represents the health index of the h-th sensor.

[0087] In the embodiments of the present application, the risk threshold is regularly updated to adapt to the aging characteristics of the equipment. Degradation processes such as circuit breaker contact wear and insulation material aging have nonlinear characteristics. Dynamic thresholds automatically adjust based on historical health index trends, more closely matching the actual aging rate of the equipment than fixed thresholds, thus avoiding misjudgments of early-stage faults. This also improves early warning sensitivity. Time series analysis of the health index (e.g., exponentially weighted moving average) can capture subtle changes in equipment status, enabling trigger conditions to be lowered in advance during threshold updates, thus achieving ultra-early warnings of fault latency. It also reduces misjudgments due to environmental interference. Real-time sensor data can compensate for the effects of factors such as ambient temperature and humidity on the threshold (e.g., a correction model for the temperature effect of contact resistance), avoiding false alarms caused by fixed thresholds under extreme operating conditions. Threshold updates and health index calculations form a feedback loop, in which historical failure cases are used to reversely correct the threshold adjustment strategy, forming a continuously evolving "monitor-assess-correct" mechanism to enhance the long-term reliability of the system.

[0088] The switch types of the simulated circuit breaker provided in the embodiment of the present application include spring switches and permanent magnet switches, such as Figure 5 As shown in FIG. 1 , this figure is a schematic diagram of a spring switch provided in an embodiment of the present application, as shown in FIG. Figure 6 As shown in the figure, this figure is a schematic diagram of a permanent magnet switch provided in an embodiment of the present application.

[0089] The housing of the simulated circuit breaker provided in the embodiments of this application is either a stainless steel spray-coated or plastic housing. This housing offers excellent insulation, heat resistance, high mechanical strength, and excellent workability. The following table illustrates the respective characteristics of the stainless steel spray-coated and plastic housings.

[0090] Table 1:

[0091] Shell type parameters Stainless steel spray plastic shell Material and durability Strong corrosion resistance, high load-bearing capacity and good fire resistance Low cost, recyclable, high insulation Security High temperature resistance, insulation insulation Look and style The surface of the stainless steel spray cabinet presents the unique cold and hard texture of metal. After spraying, the appearance is more delicate. The surface texture of the plastic cabinet is relatively light Cost-effectiveness High safety and durability Low cost and strong plasticity

[0092] An embodiment of the present application also provides an electric power system, which includes a feeder terminal and any one of the simulated circuit breakers introduced in the aforementioned embodiments, wherein the feeder terminal is used to send a data signal to the simulated circuit breaker; and the simulated circuit breaker is used to receive the data signal.

[0093] The descriptions of the processes or structures corresponding to the above figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0094] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A simulated circuit breaker, characterized in that: include: A plurality of signal interfaces, for connecting at least one signal line; wherein each of the plurality of signal interfaces corresponds to a different protocol; a control module, configured to obtain an interface identifier of a signal interface to which the signal line is connected, determine a protocol matching the interface identifier based on the interface identifier, identify a data signal transmitted by the signal line based on the protocol matching the interface identifier, and send a control instruction to a switch module; A switch module, configured to receive the control instruction and perform an opening action or a closing action according to the control instruction; Detection module, used to detect its own faults and prompt the detection results; The detection module is specifically used to: Acquire transient current signals and transient voltage signals of the simulated circuit breaker during the opening and closing process, acquire vibration acceleration signals of the action mechanism of the simulated circuit breaker, acquire contact resistance and contact area temperature field distribution of the simulated circuit breaker, and acquire ultrasonic signals generated by arc discharge of the simulated circuit breaker; Detecting self-faults based on the transient current signal, the transient voltage signal, the vibration acceleration signal, the contact resistance, the temperature field distribution in the contact area, and the ultrasonic signal; The detection module is specifically used to: Generate a first impact factor based on the transient current signal and the transient voltage signal; generate a second impact factor based on the contact resistance and the temperature field distribution of the contact area; generate a third impact factor based on the vibration acceleration signal and the ultrasonic signal; generating a risk index according to the first influencing factor, the second influencing factor, and the third influencing factor; If the risk index is greater than or equal to the risk threshold, it is determined that the simulated circuit breaker is faulty.

2. The simulated circuit breaker according to claim 1, characterized in that The detection module is specifically configured to generate the first impact factor in the following manner: in, represents the first impact factor, represents the arc energy, Indicates the first critical value of arc energy, Indicates the second critical value of arc energy, represents the first coefficient, Represents the transient voltage signal, Represents the transient current signal, Indicates the starting moment of transient voltage signal or transient current signal, Indicates the termination moment of transient voltage signal or transient current signal; The second impact factor is generated by: in, The second impact factor is Indicates the change in contact resistance per unit time. Indicates the temperature change of the contact area per unit time, Determined by the temperature field distribution in the contact area, Indicates the contact resistance of the contact, Indicates the threshold value of contact resistance, is the second coefficient, is the threshold value of the rate of change of resistance with temperature; The third impact factor is generated by: in, represents the third impact factor, Represents the weighted score of vibration acceleration signal and ultrasonic signal, represents the minimum threshold of the weighted score, represents the maximum value threshold of the weighted score, represents the first weight, represents the second weight, represents the demodulated amplitude of the vibration signal in the i-th direction at the t-th time, represents the basic amplitude of the demodulated vibration signal in the i-th direction, Indicates ultrasonic signal, Indicates the standard arc signal, express and Dynamic Time Warping values ​​between .

3. The simulated circuit breaker according to claim 1, characterized in that The detection module is specifically used to generate a risk index using the following formula: in, represents the risk index, represents the third weight, represents the first impact factor, represents the fourth weight, represents the second impact factor, represents the fifth weight, Indicates the third impact factor.

4. The simulated circuit breaker according to claim 1, characterized in that The risk threshold is updated by the following formula: in, represents the risk threshold of the jth round, represents the risk threshold of the j-1th round, is the aging coefficient, represents the interference coefficient, Represents the health index of the h-th sensor.

5. The simulated circuit breaker according to claim 1, characterized in that The detection module is further configured to determine that no fault exists in the simulated circuit breaker if the risk index is less than a risk threshold.

6. The simulated circuit breaker according to claim 1, characterized in that The switch types of the simulated circuit breaker include spring switches and permanent magnet switches.

7. The simulated circuit breaker according to any one of claims 1 to 6, characterized in that: The shell of the simulated circuit breaker is a stainless steel spray-coated or plastic shell.

8. A power system, characterized in that: comprising a feeder terminal and a simulated circuit breaker according to any one of claims 1 to 7; The feeder terminal is used to send a data signal to the simulated circuit breaker; The simulated circuit breaker is used to receive the data signal.

Images