Circuit breaker switching-out control method and device based on electric meter inching signal

Abstract

The invention relates to a circuit breaker switching-out control method and device based on an electric meter inching signal. The method comprises the steps that an electric meter control chip detects a switching-out condition, and when the electric meter control chip detects the switching-out condition, the electric meter control chip generates an N-second high-level signal; the electric meter inching signal forming module receives the N-second high-level signal generated by the electric meter control chip, forms an inching signal based on the N-second high-level signal, and transmits the inching signal to the circuit breaker; when the circuit breaker detects an inching signal, the circuit breaker executes a switch-out operation; and after the circuit breaker executes the switch-out operation, the electric meter control chip detects whether the line current is cut off, and when it is detected that the line current is not cut off, the electric meter control chip regenerates an N-second high-level signal. According to the method and the device, once the switching-out condition is detected, the switching-out operation can be immediately carried out on the circuit breaker, and the timeliness is good; and whether the switch-out operation is successful or not can be automatically detected after the switch-out operation is completed, so that the safety is high.

Description

Technical Field

[0001] This disclosure relates to the field of circuit breaker tripping control technology, and more specifically, to a circuit breaker tripping control method and apparatus based on meter jogging signals. Background Technology

[0002] The power distribution network is connected to electricity meters via wires, and the electricity meters are connected to circuit breakers via wires. The circuit breakers are then connected to individual households / companies and other electricity users via wires. When the circuit breaker is closed, the circuit is open, and power is supplied normally; when the circuit breaker is tripped, the circuit is closed, and power supply stops. Under normal circumstances, the circuit breaker is in the closed state; when an overcurrent or overload occurs, or when a remote tripping command is received (possibly due to unpaid electricity bills), the circuit breaker needs to be tripped.

[0003] In existing technology, when an overcurrent or overload occurs, the heating element inside the circuit breaker heats up due to the increased current. When the temperature reaches a certain level, the bimetallic strip bends, triggering the circuit breaker to automatically trip. When the meter receives a remote tripping command, it communicates with the circuit breaker to enable automatic tripping. However, the circuit breaker tripping method in existing technology may experience delays in tripping (when the heating element does not heat up quickly due to malfunctions, or when the communication module malfunctions, delays may also occur) or failure to trip, posing safety hazards. Summary of the Invention

[0004] In a first aspect of the embodiments of this disclosure, a circuit breaker tripping control method based on meter jogging signals is provided, comprising: The meter control chip detects the tripping condition. When the meter control chip detects the tripping condition, it generates a high-level signal for N seconds. The meter jog signal generation module receives an N-second high-level signal generated by the meter control chip, generates a jog signal based on the N-second high-level signal, and transmits the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation; After the circuit breaker completes the tripping operation, the meter control chip detects whether the line current has been cut off. If the line current is not cut off, the meter control chip generates a high-level signal for N seconds.

[0005] Preferably, the meter jog signal generation module includes: The first resistor has its first connection terminal connected to the meter control chip; The base of the transistor is connected to the second terminal of the first resistor, and the emitter of the transistor is grounded. The second resistor has its first connection terminal connected to the second connection terminal of the first resistor, and the second connection terminal of the second resistor is connected to the emitter of the transistor. A diode has its anode connected to the collector of a transistor, and the anode of the diode is connected to the power supply. The auxiliary relay coil has its first connection terminal connected to the positive terminal of the diode, and its second connection terminal connected to the negative terminal of the diode. The auxiliary relay contacts have an internal switch that operates synchronously with the auxiliary relay coil. The terminal is connected to the switch inside the auxiliary relay contact, and the terminal is also connected to the circuit breaker.

[0006] As a preferred embodiment, the method of generating a jog signal based on an N-second high-level signal specifically includes: When a high-level signal of N seconds is input to the first connection terminal of the first resistor, the transistor is synchronously turned on; when the transistor is turned on, the diode is synchronously turned on; when the diode is turned on, the auxiliary relay coil is synchronously turned on; when the auxiliary relay coil is turned on, the switch inside the auxiliary relay contacts is synchronously closed; when the switch inside the auxiliary relay contacts is closed, the terminal outputs a jog signal.

[0007] Preferably, the conditions for power outage include overcurrent, overload, receiving a remote power outage command, or electricity theft.

[0008] Preferably, the steps for determining electricity theft include: The meter control chip obtains information about the meter cover being opened. When the duration of the meter cover being open exceeds a threshold, it is determined that electricity theft has occurred.

[0009] Preferably, the steps for determining electricity theft include: The meter control chip acquires voltage value data and determines whether the voltage waveform is abnormal based on the voltage value data. When the voltage waveform is abnormal, it is determined that electricity theft has occurred.

[0010] As a preferred method, determining whether a voltage waveform is abnormal based on voltage value data specifically includes: The system acquires voltage data for the current detection cycle, determines the peak and effective voltage values ​​for the current detection cycle based on the voltage data, and calculates the peak factor for the current detection cycle based on the peak and effective voltage values. It then determines whether the absolute value of the difference between the peak factor and the baseline peak factor is greater than the peak factor threshold. If the absolute value of the difference between the peak factor and the baseline peak factor is greater than the peak factor threshold, it determines that waveform distortion has occurred in the current detection cycle. If waveform distortion occurs in the current detection cycle, it determines that the voltage waveform is abnormal. When the absolute value of the difference between the peak factor and the basic peak factor is less than or equal to the peak factor threshold, it is determined whether the peak voltage is greater than the voltage threshold. When the peak voltage is greater than the voltage threshold, it is determined that high voltage clipping has occurred in the current detection cycle. If high voltage clipping occurs in the current detection cycle, it is determined that the voltage waveform is abnormal.

[0011] In a second aspect of the embodiments of this disclosure, a circuit breaker tripping control device based on a meter jogging signal is provided, comprising: The tripping condition detection module is configured to detect tripping conditions by the meter control chip. When the meter control chip detects the tripping condition, it generates a high-level signal for N seconds. The meter jog signal generation module is configured to receive an N-second high-level signal generated by the meter control chip, generate a jog signal based on the N-second high-level signal, and transmit the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation; The circuit breaker reset module is configured so that after the circuit breaker performs a circuit breaker operation, the meter control chip detects the line current. When it detects that the line current has not been cut off, the meter control chip generates a high-level signal for N seconds again.

[0012] In a third aspect of the embodiments of this disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the method provided according to the first aspect.

[0013] In a fourth aspect of the embodiments of this disclosure, an electronic device is provided, including one or more processors and a memory associated with the one or more processors, the memory being used to store program instructions that, when read and executed by the one or more processors, perform the method provided according to the first aspect.

[0014] It should be understood that the description in the Summary of the Invention section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description.

[0015] Beneficial effects 1. The circuit breaker tripping control method and device of this embodiment can immediately trip the circuit breaker once the tripping conditions are detected, which has good timeliness; and can automatically detect whether the tripping operation is successful after the tripping operation is completed. If the tripping is unsuccessful, the tripping operation can continue to be executed until the tripping operation is successful, which has high safety.

[0016] 2. The circuit breaker tripping control method and device of this embodiment includes tripping conditions not only including the occurrence of overcurrent, overload and receiving remote tripping command, but also the occurrence of electricity theft. When electricity theft occurs, the circuit breaker can automatically trip, thereby preventing electricity theft.

[0017] 3. The circuit breaker tripping control method and device of this embodiment can not only determine whether electricity theft has occurred by the duration of the meter cover opening, but also determine whether electricity theft has occurred by the voltage waveform through voltage value data, thus making the anti-theft effect better. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A flowchart of a circuit breaker tripping control method based on meter jogging signals according to an embodiment of this disclosure is shown; Figure 2 A block diagram of a circuit breaker tripping control device based on a meter jog signal according to an embodiment of the present disclosure is shown; Figure 3 A block diagram of an electronic device according to an embodiment of the present disclosure is shown; Figure 4 A schematic diagram of the circuit structure of the meter jog signal generation module according to an embodiment of the present disclosure is shown. Detailed Implementation

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0021] Figure 1 A flowchart of a circuit breaker tripping control method 100 based on a meter jogging signal according to an embodiment of the present disclosure is shown. The method 100 includes: Step 102. The meter control chip detects the tripping condition. When the meter control chip detects the tripping condition, it generates a high-level signal for N seconds.

[0022] The meter control chip is located inside the meter. The tripping condition can be due to overcurrent, overload, or receiving a remote tripping command. Existing technology can be directly used to detect "overcurrent" and "overload". The key point of this step is that when the meter control chip detects the tripping condition, it generates a high-level signal for N seconds. In this embodiment, it can be a 3-second high-level signal, meaning the high-level signal lasts for 3 seconds.

[0023] Combination Figure 4 The N-second high-level signal is used to input the base of transistor Q. In this embodiment, transistor Q is an NPN transistor. When a high-level signal relative to the emitter is input to the base of transistor Q, if the voltage of this high-level signal is higher than the threshold voltage of the base-emitter junction (usually about 0.7V), transistor Q will start to conduct.

[0024] Step 104. The meter jog signal generation module receives the N-second high-level signal generated by the meter control chip, generates a jog signal based on the N-second high-level signal, and transmits the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation.

[0025] Combination Figure 4 The meter jog signal generation module in this step includes: a first resistor R1, a transistor Q, a second resistor R2, a diode D, an auxiliary relay coil KT-1, an auxiliary relay contact KT-2, and a terminal F.

[0026] The first terminal of the first resistor R1 is connected to the meter control chip. The base of transistor Q is connected to the second terminal of the first resistor R1, and the emitter of transistor Q is grounded. The first terminal of the second resistor R2 is connected to the second terminal of the first resistor R1, and the second terminal of the second resistor R2 is connected to the emitter of transistor Q. The anode of diode D is connected to the collector of transistor Q, and the anode of diode D is connected to the power supply. The first terminal of auxiliary relay coil KT-1 is connected to the anode of diode D, and the second terminal of auxiliary relay coil KT-1 is connected to the cathode of diode D. An internal switch in auxiliary relay contact KT-2 operates synchronously with auxiliary relay coil KT-1. Terminal F is connected to the internal switch of auxiliary relay contact KT-2, and terminal F is also connected to the circuit breaker. The power supply in this step is a 12V DC power supply.

[0027] Specifically, the generation of a jog signal based on an N-second high-level signal includes: When a high-level signal of N seconds is input to the first connection terminal of the first resistor R1, transistor Q is synchronously turned on; when transistor Q is turned on, diode D is synchronously turned on; when diode D is turned on, auxiliary relay coil KT-1 is synchronously turned on; when auxiliary relay coil KT-1 is turned on, the switch inside auxiliary relay contact KT-2 is synchronously closed; when the switch inside auxiliary relay contact KT-2 is closed, terminal F outputs a jog signal.

[0028] In this step, the N-second high-level signal enables transistor Q to conduct for N seconds, which in turn enables diode D to conduct synchronously for N seconds, thereby enabling auxiliary relay coil KT-1 to conduct synchronously for N seconds, and ultimately enabling the internal switch of auxiliary relay contact KT-2 to close synchronously for N seconds. When the internal switch of auxiliary relay contact KT-2 is closed, terminal F outputs a jogging signal; when the internal switch of auxiliary relay contact KT-2 is open, terminal F stops outputting the jogging signal. The jogging signal in this embodiment can be understood as a pulse signal. When the high-level signal is 3 seconds, the pulse width of the jogging signal is 3 seconds.

[0029] In addition, since terminal F is directly connected to the circuit breaker, terminal F can directly transmit the jog signal to the circuit breaker, and the meter and the circuit breaker do not need to communicate as in the existing technology (no communication module is required).

[0030] In summary, the purpose of this step is to generate a jog signal based on an N-second high-level signal and transmit the jog signal directly to the circuit breaker. When the circuit breaker detects the jog signal, it can immediately perform a tripping operation.

[0031] Step 106. After the circuit breaker completes the tripping operation, the meter control chip detects whether the line current has been cut off. When it detects that the line current has not been cut off, the meter control chip generates a high-level signal for N seconds again.

[0032] Assuming the meter control chip generates a 3-second high-level signal, this step can start timing from the moment the high-level signal is generated. Let's say the timing reaches 5 seconds, indicating the circuit breaker has completed its tripping operation. At this point, the meter control chip checks if the line current has been interrupted. If the line current is detected as interrupted, the circuit breaker tripped successfully; if the line current is not detected as interrupted, the circuit breaker tripped unsuccessfully.

[0033] If the circuit breaker tripping fails, the meter control chip generates a high-level signal for N seconds and returns to step 104. This allows steps 104 and 106 to be executed again, essentially performing the circuit breaker tripping operation once more. If the line current is detected to have been interrupted during the second execution of step 106, the circuit breaker tripping was successful, and the operation ends. If the line current is still not interrupted, steps 104 and 106 are executed again until the tripping is successful.

[0034] The circuit breaker tripping control method 100 of this embodiment firstly, once "overcurrent or overload" is detected or "remote tripping command" is received, it can immediately perform a tripping operation on the circuit breaker (instead of waiting for the heating element inside the circuit breaker to heat up to a certain level before tripping, or allowing the meter to successfully communicate with the circuit breaker before tripping, as in the prior art), which has good timeliness; secondly, it can automatically detect whether the tripping operation is successful after the tripping operation is completed. If the tripping operation is unsuccessful, it can continue to execute the tripping operation until the tripping operation is successful, which has high safety.

[0035] Furthermore, in addition to automatically tripping the circuit breaker when an overcurrent or overload occurs or a remote tripping command is received, the circuit breaker tripping control method 100 of this embodiment can also automatically trip the circuit breaker when "electricity theft occurs". That is, the tripping conditions include not only the occurrence of overcurrent or overload or the receipt of a remote tripping command, but also the occurrence of electricity theft.

[0036] Specifically, the steps for determining if electricity theft has occurred may include: The meter control chip obtains information about the meter cover being opened. When the duration of the meter cover being open exceeds a threshold, it is determined that electricity theft has occurred.

[0037] The electricity meter has a cover switch inside. When the cover is opened, the cover switch is triggered, allowing the meter control chip to obtain information about the open cover. Under normal circumstances, the cover is not open for a long time. Only during electricity theft will the cover be left open for an extended period. Therefore, this embodiment can determine whether electricity theft has occurred by measuring the duration the cover is open (i.e., whether the open cover duration exceeds a threshold).

[0038] In addition to stealing electricity by opening the meter cover, other methods include using an external transformer to reduce the input voltage and make the meter reading falsely low, using a thyristor to cut off the top of the voltage waveform to cause the effective value to be distorted, or periodically injecting high-voltage pulses to interfere with the working timing of the metering chip.

[0039] During electricity use, the meter's control chip can collect voltage values ​​in real time. Under normal circumstances, since the power grid is 220V AC, these voltage values ​​are sinusoidal. However, the applicant discovered that adding an external transformer, using a thyristor, or injecting a high-voltage pulse can cause abnormal voltage waveforms. Therefore, this implementation can also determine whether electricity theft has occurred by acquiring voltage data through the meter's control chip and judging whether the voltage waveform is abnormal based on the voltage data. When an abnormal voltage waveform is detected, electricity theft is determined to have occurred.

[0040] Specifically, determining whether a voltage waveform is abnormal based on voltage value data includes: Step 402. Obtain the voltage value data of the current detection cycle, determine the peak voltage and effective voltage of the current detection cycle based on the voltage value data, and calculate the peak factor of the current detection cycle based on the peak voltage and effective voltage; determine whether the absolute value of the difference between the peak factor and the basic peak factor is greater than the peak factor threshold. When the absolute value of the difference between the peak factor and the basic peak factor is greater than the peak factor threshold, it is determined that waveform distortion occurs in the current detection cycle.

[0041] In this embodiment, the detection cycle can be 10 seconds. Since the power grid is alternating current (1 alternating current cycle is 0.02 seconds), 1 detection cycle includes voltage value data for 500 alternating current cycles, and 1 alternating current cycle includes S instantaneous voltage values.

[0042] For voltage data of one AC cycle, one sub-peak voltage and one sub-RMS voltage can be obtained based on S instantaneous voltage values. The sub-peak voltage is the maximum value among the S instantaneous voltage values. The calculation process for the sub-RMS voltage is as follows: first, square the S instantaneous voltage values ​​to obtain S squared values; then, sum the S squared values; divide the sum by S to obtain the average value; finally, take the square root of the average value to obtain the sub-RMS voltage of the AC cycle.

[0043] Since the current detection cycle consists of 500 AC cycles, it yields 500 sub-peak voltages and 500 sub-RMS voltages. The peak voltage of the current detection cycle is the average of these 500 sub-peak voltages, and the RMS voltage is the average of these 500 sub-RMS voltages. Dividing the peak voltage of the current detection cycle by the RMS voltage yields the crest factor of the current detection cycle.

[0044] A normal AC power grid has a peak voltage of 311V and an effective voltage of 220V, so its crest factor is 1.414. Since the crest factor of a normal AC power grid is 1.414, this embodiment sets the basic crest factor to 1.414.

[0045] After calculating the peak factor for the current detection period, it is only necessary to first obtain the absolute value of the difference between the peak factor and the baseline peak factor. Assuming the peak factor is 1.785, the absolute value of the difference between the peak factor and the baseline peak factor is 0.371. Then, it is determined whether the absolute value of the difference is greater than the peak factor threshold. In this embodiment, the peak factor threshold is 0.2. The peak factor threshold was obtained by the applicant through extensive experimentation. When the peak factor threshold is 0.2, the accuracy in determining whether waveform distortion occurs in the current detection period is highest. If the absolute value of the difference is greater than the peak factor threshold, it is determined that waveform distortion occurs in the current detection period; otherwise, it is determined that no waveform distortion occurs in the current detection period. In this embodiment, when the absolute value of the difference is 0.371 and the peak factor threshold is 0.2, the absolute value of the difference is greater than the peak factor threshold, and at this time, it is determined that waveform distortion occurs in the current detection period. If waveform distortion occurs in the current detection period, it is determined that the voltage waveform is abnormal.

[0046] Step 404. When the absolute value of the difference between the peak factor and the basic peak factor is less than or equal to the peak factor threshold, determine whether the peak voltage is greater than the voltage threshold. When the peak voltage is greater than the voltage threshold, determine that high voltage clipping has occurred in the current detection cycle.

[0047] The voltage threshold in this embodiment is determined by the following formula: Where S is the voltage threshold, Y is the effective voltage, and a is an empirical value, with a value of 10.

[0048] The effective voltage Y here is the effective voltage calculated in step 402. The empirical value 'a' was obtained by the applicant through numerous experiments. When the empirical value 'a' is 10, the accuracy in determining whether high-voltage clipping occurs in the current detection cycle is highest. Assuming the effective voltage Y is 120V, then the voltage threshold S is equal to 186; assuming the effective voltage Y is 220V, then the voltage threshold S is equal to 342. If the waveform is normal, then the effective voltage Y is 220V, the peak voltage is 311V, and the voltage threshold S is 342. Since the peak voltage is less than the voltage threshold, it is determined that no high-voltage clipping occurs in the current detection cycle. If the effective voltage Y is 120V and the crest factor is 1.6, then the peak voltage is 196V, and the voltage threshold S is 186. Since the peak voltage is greater than the voltage threshold, it is determined that high-voltage clipping occurs in the current detection cycle. If high-voltage clipping occurs in the current detection cycle, then the voltage waveform is determined to be abnormal.

[0049] Figure 2 A block diagram of a circuit breaker tripping control device 200 based on a meter jogging signal according to an embodiment of the present disclosure is shown. The device 200 includes: The tripping condition detection module is configured to detect tripping conditions by the meter control chip. When the meter control chip detects the tripping condition, it generates a high-level signal for N seconds. The meter jog signal generation module is configured to receive an N-second high-level signal generated by the meter control chip, generate a jog signal based on the N-second high-level signal, and transmit the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation; The circuit breaker reset module is configured so that after the circuit breaker performs a circuit breaker operation, the meter control chip detects the line current. When it detects that the line current has not been cut off, the meter control chip generates a high-level signal for N seconds again.

[0050] The meter jog signal generation module includes: The first resistor R1 has its first connection terminal connected to the meter control chip; The base of transistor Q is connected to the second terminal of the first resistor R1, and the emitter of transistor Q is grounded. The first connection terminal of the second resistor R2 is connected to the second connection terminal of the first resistor R1, and the second connection terminal of the second resistor R2 is connected to the emitter of the transistor Q. Diode D has its anode connected to the collector of transistor Q, and the anode of diode D is connected to the power supply. The auxiliary relay coil KT-1 has its first connection terminal connected to the positive terminal of diode D, and its second connection terminal connected to the negative terminal of diode D. The auxiliary relay contact KT-2 has an internal switch that operates synchronously with the auxiliary relay coil KT-1; Terminal F is connected to the switch inside the auxiliary relay contact KT-2, and terminal F is also connected to the circuit breaker.

[0051] Furthermore, the power outage condition detection module includes: The first electricity theft detection unit is configured to obtain meter cover opening information from the meter control chip, and determine that electricity theft has occurred when the meter cover opening time exceeds the opening time threshold.

[0052] The second electricity theft detection unit is configured to acquire voltage value data from the electricity meter control chip and determine whether the voltage waveform is abnormal based on the voltage value data. When the voltage waveform is abnormal, it is determined that electricity theft has occurred.

[0053] Furthermore, the second electricity theft detection unit includes: The first voltage waveform anomaly determination subunit is configured to acquire voltage value data for the current detection cycle, determine the peak voltage and effective voltage for the current detection cycle based on the voltage value data, and calculate the peak factor for the current detection cycle based on the peak voltage and effective voltage. It then determines whether the absolute value of the difference between the peak factor and the basic peak factor is greater than the peak factor threshold. If the absolute value of the difference between the peak factor and the basic peak factor is greater than the peak factor threshold, it determines that waveform distortion has occurred in the current detection cycle. If waveform distortion has occurred in the current detection cycle, it determines that the voltage waveform is abnormal. The second voltage waveform anomaly determination subunit is configured to determine whether the peak voltage is greater than the voltage threshold when the absolute value of the difference between the peak factor and the basic peak factor is less than or equal to the peak factor threshold. If the peak voltage is greater than the voltage threshold, it is determined that high voltage clipping has occurred in the current detection cycle. If high voltage clipping has occurred in the current detection cycle, it is determined that the voltage waveform is abnormal.

[0054] Figure 3 A block diagram of an electronic device 300 according to an embodiment of the present disclosure is shown. The device 300 includes a processor 301, which can perform various appropriate actions and processes according to computer program instructions loaded into random access memory (RAM) 303 based on computer program instructions stored in read-only memory (ROM) 302. Various programs and data required for the operation of the device 300 may also be stored in RAM 303. The processor 301, ROM 302, and RAM 303 are interconnected via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0055] The various processes and procedures described above, such as method 100, can be executed by processor 301. For example, in some embodiments, method 100 may be implemented as a software program tangibly contained in a machine-readable medium. In some embodiments, part or all of the software program may be loaded and / or installed on device 300 via ROM 302. When the software program is loaded into RAM 303 and executed by processor 301, one or more actions of method 100 described above may be performed.

[0056] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload programmable logic devices (CPLDs), and so on.

[0057] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0058] This disclosure can be a method, apparatus, system, and / or program product. The program product may include a machine-readable storage medium on which machine-readable program instructions for performing various aspects of this disclosure are loaded. The machine-readable program instructions described herein can be downloaded from the machine-readable storage medium to various computing / processing devices, or downloaded via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the machine-readable program instructions from the network and forwards them to the machine-readable storage medium in the respective computing / processing device.

[0059] Machine program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. Machine-readable program instructions may be executed entirely on a user's computer, partially on a user's computer, as a standalone software package, partially on a user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the machine-readable program instructions. This electronic circuitry can execute the machine-readable program instructions to implement various aspects of this disclosure.

[0060] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing. Furthermore, although operations are depicted in a specific order, this should be understood as requiring that such operations be performed in the specific order shown or in sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0061] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A circuit breaker tripping control method based on meter jogging signals, characterized in that, include: The meter control chip detects the tripping condition. When the meter control chip detects the tripping condition, it generates a high-level signal for N seconds. The meter jog signal generation module receives an N-second high-level signal generated by the meter control chip, generates a jog signal based on the N-second high-level signal, and transmits the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation; After the circuit breaker completes the tripping operation, the meter control chip detects whether the line current has been cut off. If the line current is not cut off, the meter control chip generates a high-level signal for N seconds.

2. The method according to claim 1, characterized in that, The meter jog signal generation module includes: The first resistor (R1) has its first connection terminal connected to the meter control chip; The base of the transistor (Q) is connected to the second terminal of the first resistor (R1), and the emitter of the transistor (Q) is grounded. The first connection terminal of the second resistor (R2) is connected to the second connection terminal of the first resistor (R1), and the second connection terminal of the second resistor (R2) is connected to the emitter of the transistor (Q). A diode (D) has its anode connected to the collector of the transistor (Q), and the anode of the diode (D) is connected to a power supply. The auxiliary relay coil (KT-1) has its first connection terminal connected to the positive terminal of the diode (D), and its second connection terminal connected to the negative terminal of the diode (D). The auxiliary relay contact (KT-2) has a switch inside that operates synchronously with the auxiliary relay coil (KT-1); Terminal (F) is connected to the switch inside the auxiliary relay contact (KT-2), and terminal (F) is connected to the circuit breaker.

3. The method according to claim 2, characterized in that, The specific steps for generating a jog signal based on the N-second high-level signal are as follows: When a high-level signal of N seconds is input to the first connection terminal of the first resistor (R1), the transistor (Q) is synchronously turned on; when the transistor (Q) is turned on, the diode (D) is synchronously turned on; when the diode (D) is turned on, the auxiliary relay coil (KT-1) is synchronously turned on; when the auxiliary relay coil (KT-1) is turned on, the switch inside the auxiliary relay contact (KT-2) is synchronously closed; when the switch inside the auxiliary relay contact (KT-2) is closed, the terminal (F) outputs a jog signal.

4. The method according to claim 1, characterized in that, The conditions for power outage include overcurrent, overload, receiving a remote power outage command, or electricity theft.

5. The method according to claim 4, characterized in that, The steps for determining if electricity theft has occurred include: The meter control chip obtains information about the meter cover being opened. When the duration of the meter cover being open exceeds a threshold, it is determined that electricity theft has occurred.

6. The method according to claim 4, characterized in that, The steps for determining if electricity theft has occurred include: The meter control chip acquires voltage value data and determines whether the voltage waveform is abnormal based on the voltage value data. When the voltage waveform is abnormal, it is determined that electricity theft has occurred.

7. The method according to claim 6, characterized in that, Determining whether a voltage waveform is abnormal based on voltage value data specifically includes: The system acquires voltage data for the current detection cycle, determines the peak voltage and effective voltage for the current detection cycle based on the voltage data, and calculates the peak factor for the current detection cycle based on the peak voltage and effective voltage. It then determines whether the absolute value of the difference between the peak factor and the baseline peak factor is greater than a peak factor threshold. If the absolute value of the difference between the peak factor and the baseline peak factor is greater than the peak factor threshold, it determines that waveform distortion has occurred in the current detection cycle. If waveform distortion occurs in the current detection cycle, it determines that the voltage waveform is abnormal. When the absolute value of the difference between the peak factor and the basic peak factor is less than or equal to the peak factor threshold, it is determined whether the peak voltage is greater than the voltage threshold. When the peak voltage is greater than the voltage threshold, it is determined that high voltage clipping has occurred in the current detection cycle. If high voltage clipping occurs in the current detection cycle, it is determined that the voltage waveform is abnormal.

8. A circuit breaker tripping control device based on meter jogging signals, characterized in that, include: The circuit breaker condition detection module is configured to detect circuit breaker conditions by the meter control chip. When the meter control chip detects the circuit breaker condition, the meter control chip generates a high-level signal for N seconds. The meter jog signal generation module is configured to receive an N-second high-level signal generated by the meter control chip, generate a jog signal based on the N-second high-level signal, and transmit the jog signal to the circuit breaker; when the circuit breaker detects the jog signal, the circuit breaker performs a tripping operation; The circuit breaker reset module is configured so that after the circuit breaker performs a circuit breaker operation, the meter control chip detects the line current. When it detects that the line current has not been cut off, the meter control chip generates a high-level signal for N seconds again.

9. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1-7.

10. An electronic device, characterized in that, include: One or more processors, and A memory associated with the one or more processors, the memory being used to store program instructions that, when read and executed by the one or more processors, perform the steps of the method according to any one of claims 1-7.

Images