Detection and control method of reclosing circuit breaker based on current detection

Abstract

The present application discloses a power management system based on current detection and control of reclosing, including a miniature circuit breaker connected in series in a load circuit, wherein the miniature circuit breaker realizes closing and / or tripping through an electric operating device in an execution unit, wherein the execution unit is electrically connected to a processing unit, wherein the processing unit is electrically connected to a power module, a detection module, and a communication module respectively; wherein the communication module has a transceiver unit for wireless communication with a cloud server; and wherein the processing unit is electrically connected to the detection module through a detection signal processing unit. It is used to realize circuit fault detection, and for circuits that are tripped due to instantaneous overload or temporary protection, it is possible to realize automatic closing or remote closing without the need for manual closing, thereby saving time and effort, greatly shortening the duration of power outages, and minimizing the losses caused by power outages.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers and circuit breaker management, and in particular to the field of circuit breakers with automatic reclosing and systems for managing automatic reclosing circuit breakers to achieve remote control, and specifically to a power management system and a detection control method for controlling reclosing based on current detection. Background Art

[0002] Circuit breakers are devices installed on the power supply trunk of almost all load circuits, and their purpose is to achieve safe operation of the load circuit. When a short circuit, circuit break or overload occurs in the circuit, the circuit breaker will automatically disconnect based on the protection function, so that the load circuit is de-energized, thereby achieving the protection function. However, in real life, most circuit breakers automatically trip because of instantaneous overload or protection power failure. After the circuit breaker automatically trips, if the load circuit wants to be re-energized, it is necessary to manually go to the location of the circuit breaker for processing, or install an intelligent automatic reclosing circuit breaker. There are many types of automatic circuit breakers, some of which are based on a single circuit breaker for self-test and then automatically close, and some require a background server for detection, and then remotely close after the fault is eliminated. Since there are countless circuit breakers in a huge power grid, if all circuit breakers need to be handled manually, then in the case of tripping caused by instantaneous overload or leakage, the cost of manually closing the circuit to restore power is huge. In view of this, a scientific management system and a reliable automatic merging circuit breaker are needed to solve the existing technical problems. Summary of the invention

[0003] In order to solve the problems of the existing technology described in the background technology, such as the use of manual closing, which results in the investment of manpower and material resources, low closing efficiency, and long power recovery time, the present application provides a power management system based on current detection and control of reclosing. It is used to realize circuit fault detection, and for circuits tripped due to instantaneous overload or temporary protective tripping, it can realize automatic closing or remote closing without manual closing, thus saving time and effort, greatly shortening the power outage time, and minimizing the losses caused by power outage.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is:

[0005] The power management system based on current detection and reclosing control comprises a miniature circuit breaker connected in series in a load circuit, wherein the miniature circuit breaker realizes closing and / or tripping through an electric operating device in an execution unit, wherein the execution unit is electrically connected to a processing unit, wherein the processing unit is electrically connected to a power module, a detection module and a communication module respectively; wherein the communication module comprises a transmitting unit for wireless communication with a cloud server; wherein the processing unit is electrically connected to the detection module through a detection signal processing unit, wherein the detection module comprises a strong current load detection unit and a weak current load detection unit; wherein a current limiting unit for stabilizing the balanced current is further arranged between the processing unit and the power module; wherein the processing unit controls the on and off of the miniature circuit breaker by using a single chip microcomputer of model STC15W415AS-TSSOP28 to exchange information between the signal from the detection signal processing unit and the cloud server through the transmitting unit and then sends an action command signal to the execution unit; wherein the processing unit is further connected to a display unit for displaying the fault state detected by the detection module.

[0006] Preferably, the power module, detection module, communication module and execution unit are integrated into a shell structure and are connected to the miniature circuit breaker by a snap-on connection; the shell structure is provided with a power interface of the power module, a communication interface for RS plug-in communication, an antenna interface, a first detection interface, a second detection interface and a signal conversion interface, as well as a card slot required for the transmitting unit; the shell structure is also provided with a digital tube and an indicator diode for displaying the detection status in the display unit.

[0007] Preferably, the electric operating device is arranged inside the housing structure and is installed in a manner fitting the miniature circuit breaker, and the L-shaped swing arm in the electric operating device toggles the gate switch through a lever to achieve closing and / or tripping.

[0008] Preferably, the electric operating device includes a motor, a worm, a first reduction gear, a second reduction gear, a third reduction gear, a fourth reduction gear and an opening and closing mechanism for controlling the on and off of the miniature circuit breaker, which are sequentially driven and connected.

[0009] Preferably, the opening and closing mechanism includes a crescent ring meshing and rotating with the third reduction gear, and the crescent ring is nested and clamped with a clutch for combining or separating the rotational torque from the crescent ring, and the clutch is coaxially mounted and clamped by an L-shaped swing arm to move the miniature circuit breaker to achieve tripping / closing.

[0010] Preferably, at least one baffle is provided on the end face of the crescent ring, an arc groove for accommodating the baffle is provided on the end face of the clutch, and a through hole for nesting the axial end of the L-shaped swing arm is provided at the axial center of the clutch.

[0011] Preferably, the gate switch on the miniature circuit breaker is toggled by a lever fixedly connected to the end of the L-shaped swing arm; the lever rotates coaxially with the clutch member, the motor performs forward and reverse rotation through the forward and reverse electrical signals given by the processing unit, and the miniature circuit breaker is turned on and off by driving the lever to swing with the L-shaped swing arm as the radius.

[0012] Preferably, the electric operating device also includes a closing mode adjustment mechanism, specifically including an adjusting slide cover slidably arranged on the housing structure of the electric operating device, one end of the lower surface of the adjusting slide cover vertically extending downward to form a paddle, the paddle is installed between the clutch and the L-shaped swing arm, and the paddle realizes the combination or separation of the clutch and the L-shaped swing arm by sliding the adjusting slide cover left and right; at least one pair of buckles are arranged on the housing structure, and a buckle groove matching the buckle is arranged on the miniature circuit breaker.

[0013] The present invention also provides a current detection control method for the above power management system. The above power management system is implemented, the cloud server also includes a transceiver module for receiving the information of the transmitting unit, and a storage module, a cleaning module, an analysis module and a comparison module which are sequentially connected to the transceiver module, and the comparison module communicates with the transceiver module in a one-way manner; the control method includes the following steps:

[0014] Step S100, the collected current signal data Qn in the load circuit is transmitted to the transceiver module in the cloud server through the transmitting unit, and the transceiver module sends the received current signal data Qn to the storage module for temporary storage;

[0015] Step S200, the cleaning module calls the current signal data Qn from the storage module, identifies the labels Bn preset by the system for different emission units in the current signal data Qn, and lists all the current signal data Qn corresponding to the labels Bn in sequence to form a current signal data stream QN under the labels Bn;

[0016] Step S300, the analysis module removes the distorted negative and zero data of the current signal data stream QN in step S200 to obtain positive valid data QN+;

[0017] Step S400, the comparison module compares the read positive valid data QN+ with the normal set data value range Nor (a, b) corresponding to the label Bn preset by the system as follows:

[0018] If QN+-Nor / a is a negative value, the comparison module outputs a 'true' value and sends a tripping signal to the transceiver module; if QN+-Nor / a is a positive value, the comparison module outputs a 'false' value and continues to compare the next one until the comparison module outputs a 'true' value;

[0019] If QN+-Nor / b is a negative value, the comparison module outputs 'false' and sends a trip or close execution signal to the transceiver module; if QN+-Nor / b is a positive value, the comparison module outputs 'true' and continues to compare the next one until the comparison module outputs 'false';

[0020] Step S500: After the transceiver module sends the execution electrical signal to the transmitting unit, the tripping or closing action is executed in sequence through the processing unit and the execution unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 It is a system structure block diagram of the present invention;

[0023] Figure 2 It is an oblique bottom-up axonometric view of the structure of the present invention;

[0024] Figure 3 It is an oblique top view axonometric diagram of the structure of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram without a miniature circuit breaker;

[0026] Figure 5 It is the internal structure diagram of the electric operation device;

[0027] Figure 6 It is an exploded view of the opening and closing mechanism;

[0028] Figure 7 yes Figure 6 Reverse perspective exploded diagram;

[0029] Figure 8 is the circuit diagram of the power module in Example 1;

[0030] Fig. 9 is the circuit diagram of the current limiting unit in Example 1;

[0031] Fig.10 is a circuit diagram of a processing unit in Embodiment 1;

[0032] Fig.11 is a circuit diagram of a display unit in Embodiment 1;

[0033] Fig.12 This is a circuit diagram of the weak current load detection part of the detection unit in Example 1;

[0034] Fig.13 is the circuit diagram of the communication module in Example 1;

[0035] Fig.14 is the circuit diagram of the transmitting unit in Embodiment 1;

[0036] Fig.15 This is a circuit diagram of a strong electric load detection part of the detection unit in Example 1;

[0037] Fig.16 is a circuit diagram of a detection signal processing unit in Embodiment 1;

[0038] Fig.17 This is a schematic diagram of Example 3.

[0039] In the figure: 1-power module; 2-current limiting unit; 3-processing unit; 4-communication unit; 5-transmitting unit; 6-cloud server; 7-detection signal processing unit; 8-detection module; 9-weak current load detection unit; 10-strong current load detection unit; 11-display unit; 12-execution unit; 13-electric operation device; 14-miniature circuit breaker;

[0040] 15-digital tube; 16-indicator diode; 17-first detection interface; 18-second detection interface; 19-power interface; 20-communication interface; 21-antenna interface; 22-card slot;

[0041] 23-motor; 24-worm; 25-first reduction gear; 26-second reduction gear; 27-third reduction gear; 28-fourth reduction gear; 29-crescent ring; 30-clutch; 31-adjusting slide; 32-paddle; 33-gate switch; 34-arc groove; 35-L-shaped swing arm; 36-paddle; 37-blocking piece; 38-clip; 39-clip groove; 40-signal conversion interface. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] Embodiment 1:

[0049] This embodiment is a preferred embodiment of the system. Figure 1 , Figure 8-16The power management system based on current detection and control of reclosing shown in the figure includes a miniature circuit breaker 14 connected in series in the load circuit, and the miniature circuit breaker 14 realizes closing and / or tripping through the electric operation device 13 in the execution unit 12, and the execution unit 12 is electrically connected to the processing unit 3, and the processing unit 3 is electrically connected to the power module 1, the detection module 8 and the communication module 4 respectively; the communication module 4 has a transmitting unit 5 for wireless communication with the cloud server 6; the processing unit 3 is electrically connected to the detection module 8 through the detection signal processing unit 7, and the detection module 8 is composed of a strong current load The micro-circuit breaker 14 is composed of a detection unit 10 and a weak current load detection unit 9; a current limiting unit 2 for stabilizing the balanced current is also arranged between the processing unit 3 and the power module 1; the processing unit 3 uses a single-chip microcomputer with model number STC15W415AS-TSSOP28 to exchange information between the signal from the detection signal processing unit 7 and the cloud server 6 through the transmitting unit 5 and then sends an action command signal to the execution unit 12 to control the on and off of the micro-circuit breaker 14; the processing unit 3 is also connected to a display unit 11 for displaying the fault state detected by the detection module 8. The power module 1, the detection module 8, the communication module 4 and the execution unit 12 are an integrated shell structure and are connected to the miniature circuit breaker 14 by a snap-on connection; the shell structure is provided with a power interface 19 of the power module 1, a communication interface 20 for plug-in communication in RS485 mode, an antenna interface 21, a first detection interface 17, a second detection interface 18 and a signal conversion interface 40, as well as a card insertion slot 22 required by the transmitting unit 5; the shell structure is also provided with a digital tube 15 and an indicator diode 16 for displaying the detection status in the display unit 11.

[0050] The power module 1 is used to supply power to the entire system. In this embodiment, the method adopted is to take power from the load AC power L and N, and provide the current and voltage required by the system to each module and unit through the rectifier circuit, filter circuit, and voltage stabilization circuit to ensure the stable supply of power to the system. For details, see the attached manual. Figure 8 After the detection module 8 detects the load circuit, it is processed by the processing unit 3. Finally, the driving force when the miniature circuit breaker 14 needs to act comes from the execution unit 12. The execution unit 12 obtains the electrical signal when executing the action, and supplies the driving current. This embodiment is realized by combining the TPS2552 and L9110S processors. The connection method and processing logic are detailed in the attached manual. Fig. 9 As shown. By driving the execution unit 12, the miniature circuit breaker 14 is turned on and off, thereby achieving the purpose of automatically controlling the load circuit. As the core processing unit 3 of this system, the STC15W415AS-TSSOP28 single-chip microcomputer is used to realize the coordination and indication of various functional units of this system. Its connection method and pin function are shown as follows Fig.10 The content shown is shown. In this embodiment, the display unit 11 uses both a digital tube 15 and an indicator diode 16 for status display. The digital tube 15 is mainly implemented through the fault code set in the system. For example, 01-99 is any two-digit fault code. The specific meaning can be preset by the system. This is a common basic method for those skilled in the art and will not be described here. The indicator diode 16 mainly distinguishes the normal or faulty state of the system through green and red colors. The output method is shown in the attached Fig.11 The weak current load detection unit 9 in the detection module 8 is processed by a single chip microcomputer of type STM32F051C8T. The circuit output logic is as follows: Fig.12 As shown in the figure, the high-voltage load detection unit 10 needs to be reduced in voltage before detection due to its high voltage. The actual objective load circuit situation can be inferred through the detected value and the logic parameter of the voltage reduction. This indirect detection method is used to achieve this. Fig.15 As shown, for the three-phase power, the following Fig.15 The series step-down circuit L1, L2, and L3 shown in the figure divide the voltage, measure the voltage after the voltage division, and then analyze and output the measured data. Specifically, a processor of model CD4051BCM is used for processing. The processing method is as follows Fig.15 The communication module 4 in this embodiment uses a single chip microcomputer of model ME3616 for processing, and the processing method is as follows Fig.13 Then, through Fig.14 The content shown processes and transmits the signal, and exchanges wireless data with the cloud server 6 to achieve the purpose of remote control. In order to enable the weak current load detection unit 9 and the strong current load detection unit 10 to directly input the detection information into the single chip microcomputer model STC15W415AS-TSSOP28 for processing, the information data needs to be converted and processed, and different modules communicate through the interface set on the shell structure using RS485 to form a closed-loop feedback digital processing system.

[0051] Embodiment 2:

[0052] This embodiment is to explain and illustrate the structure and working principle of the electric operation device 13 in the system. Figure 2-7As shown, the electric operation device 13 is arranged in the housing structure and is installed in a manner that fits the miniature circuit breaker 14. The L-shaped swing arm 35 in the electric operation device 13 toggles the gate switch 33 through the toggle lever 36 to achieve closing and / or tripping. The electric operation device 13 includes a motor 23, a worm 24, a first reduction gear 25, a second reduction gear 26, a third reduction gear 27, a fourth reduction gear 28, and an opening and closing mechanism for controlling the on and off of the miniature circuit breaker 14. The opening and closing mechanism includes a crescent ring 29 that meshes and rotates with the third reduction gear 27. The crescent ring 29 is embedded with a clutch 30 for combining or separating the rotational torque from the crescent ring 29. The clutch 30 toggles the miniature circuit breaker 14 through the L-shaped swing arm 35 that is coaxially mounted and clamped to achieve tripping / closing. At least one baffle 37 is provided on the end surface of the crescent ring 29, an arc groove 34 for accommodating the baffle 37 is provided on the end surface of the clutch 30, and a through hole for nesting the axial end of the L-shaped swing arm 35 is provided at the axial center of the clutch 30. The gate switch 33 on the miniature circuit breaker 2 is toggled by a lever 36 fixedly connected to the end of the L-shaped swing arm 35; the lever 36 rotates coaxially with the clutch 30, the motor 5 performs forward and reverse rotation through the forward and reverse electrical signals given by the processing unit 3, and drives the lever 36 to swing with the L-shaped swing arm 35 as the radius to realize the on and off of the miniature circuit breaker 14.

[0053] The electric operating device 13 also includes a closing mode adjustment mechanism, which specifically includes an adjustment slide cover 31 slidably arranged on the shell structure of the electric operating device 13, and one end of the lower surface of the adjustment slide cover 31 extends vertically downward to form a paddle 32, and the paddle 32 is installed between the clutch 30 and the L-shaped swing arm 35. The paddle 32 realizes the combination or separation of the clutch 30 and the L-shaped swing arm 35 by sliding the adjustment slide cover 31 left and right; at least one pair of buckles 38 are arranged on the shell structure, and a buckle groove 39 cooperating with the buckle 38 is arranged on the miniature circuit breaker 14.

[0054] The processing unit 3 sends a driving signal to the motor 23. After the motor 23 receives the electrical signal, it starts to rotate, and transmits the rotation torque of the motor 23 through the worm 24 coaxially connected to the motor 23 through the reduction gear wheel group composed of the first reduction gear 25, the second reduction gear 26, the third reduction gear 27 and the fourth reduction gear 28. During the transmission process, the rotation speed is greatly reduced, but the torque is multiplied. Finally, the opening and closing of the miniature circuit breaker 14 is acted on to realize the automatic disconnection function, thereby replacing the manual manual switch action, without the need for manual personal visit, saving time and effort. When closing the switch, the principle is the same as opening the switch, but the NB-IOT communication module will send an opposite electrical signal to the motor 23, that is, the positive and negative electrode potentials are opposite, and the direction of the motor 23 is also opposite at this time, so that the final action is also opposite, so as to achieve the purpose of closing the switch and powering on. The motor 23 in this embodiment adopts a small DC motor with a large reduction ratio reduction gear wheel group to achieve the purpose of reducing speed and increasing torque. The advantage of this is that the requirements for the driving DC signal are very low, and the small DC motor 23 can be integrated into the electric operating device 13 and directly installed at the position of the miniature circuit breaker 14, so the installation is more standardized and the use is safer. Since the DC motor 23 is driven by the worm 24, when the DC motor 23 is not in motion, the reduction gear wheel set will not rotate at all under the obstruction of the helical teeth of the worm 24, thereby ensuring the stability of opening and closing the switch.

[0055] When performing a tripping / closing action, first, the torque from the motor 23 and the reduction gear wheel set is transmitted to the coaxially mounted clutch 30 through the crescent ring 29; secondly, the torque is transmitted from the clutch 30 to the L-shaped swing arm 35, and the miniature circuit breaker 14 is tripped or closed by the swing of the L-shaped swing arm 35. The L-shaped swing arm 35 is an execution unit and an adaptive matching mechanism. Since the external dimensions of the existing miniature circuit breakers 14 are basically uniform, the length of the L-shaped swing arm 35 generally only needs to be set to one specification; of course, if matching control is required for non-standard miniature circuit breakers 14, the length of the L-shaped swing arm 35 can be adaptively increased or decreased to meet the requirements. If the length of the L-shaped swing arm 35 is too large, it may result in insufficient output of the closing torque, so the reduction ratio of the reduction gear wheel set can be increased. As long as it is within the scope of the inventive concept of the present application, that is, the opening and closing of the gate is achieved through the cooperation of the reduction gear wheel set and the opening and closing mechanism, it should be understood to be within the protection scope of the present application, regardless of the setting of the reduction ratio range and the setting of the length range of the L-shaped swing arm 35.

[0056] In this embodiment, in order to realize the opening and closing of the clutch 30 and the crescent ring 29, a pair of baffles 37 are symmetrically arranged on the end surface of the crescent ring 29, and a pair of arc-shaped grooves 34 are arranged opposite to each other on the end surface of the clutch 30 for accommodating the baffles 37. A through hole for nesting the axial end of the L-shaped swing arm 35 is arranged at the axial center of the clutch 30. The electric operation device 13 also includes a closing mode adjustment mechanism, which specifically includes an adjustment slide cover 31 slidably arranged on the outer shell of the electric operation device 13, and one end of the lower surface of the adjustment slide cover 31 extends vertically downward to form a paddle 32, which is installed between the clutch 30 and the crescent ring 29, and the paddle 32 realizes the combination or separation of the clutch 30 and the crescent ring 29 by sliding the adjustment slide cover 31 left and right. When the paddle 32 separates the clutch 30 from the crescent ring 29 under the drive of the adjusting slide 31, the clutch 30 and the crescent ring 29 rotate independently of each other. At this time, the crescent ring 29 and the clutch 30 no longer have a driving relationship. In this state, the miniature circuit breaker 14 is not controlled by the electric operating device 13, and the corresponding mode is the manual mode. This mode is generally used when a short circuit occurs in the circuit or other faults that require maintenance before power can be restored. Therefore, the present invention quickly realizes the switching between the automatic mode and the manual mode by adjusting the slide 31, and can flexibly handle different fault conditions, which is extremely practical.

[0057] Embodiment 3:

[0058] In conjunction with the instruction manual Figure 1 , 3 and Fig.17 The current detection control method of a power management system shown in the embodiment includes the power management system described in Example 2. Further, the cloud server 6 also includes a transceiver module for receiving information from the transmitting unit 5, and a storage module, a cleaning module, an analysis module and a comparison module that are sequentially connected to the transceiver module, and the comparison module communicates with the transceiver module in a one-way manner; the control method includes the following steps:

[0059] Step S100, the current signal data Qn collected in the load circuit is transmitted to the transceiver module in the cloud server 6 through the transmitting unit 5, and the transceiver module sends the received current signal data Qn to the storage module for temporary storage;

[0060] Step S200, the cleaning module calls the current signal data Qn from the storage module, identifies the labels Bn preset by the system for different emission units 5 in the current signal data Qn, and lists all the current signal data Qn corresponding to the labels Bn in sequence to form a current signal data stream QN under the labels Bn;

[0061] Step S300, the analysis module removes the distorted negative and zero data of the current signal data stream QN in step S200 to obtain positive valid data QN+;

[0062] Step S400, the comparison module compares the read positive valid data QN+ with the normal set data value range Nor (a, b) corresponding to the label Bn preset by the system as follows:

[0063] If QN+-Nor / a is a negative value, the comparison module outputs a 'true' value and sends a tripping signal to the transceiver module; if QN+-Nor / a is a positive value, the comparison module outputs a 'false' value and continues to compare the next one until the comparison module outputs a 'true' value;

[0064] If QN+-Nor / b is a negative value, the comparison module outputs 'false' and sends a trip or close execution signal to the transceiver module; if QN+-Nor / b is a positive value, the comparison module outputs 'true' and continues to compare the next one until the comparison module outputs 'false';

[0065] Step S500: After the transceiver module sends the execution electrical signal to the transmitting unit 5, the processing unit 3 and the execution unit 12 execute the tripping or closing action in sequence.

[0066] It is worth noting that: the system preset values ​​of the normal setting data value range Nor (a, b) are different in different states. The system automatically establishes two sets of modes for the label Bn preset by any transmitting unit 5. One set is the different data value ranges Nor (a, b) corresponding to the normal operation of the load circuit, that is, the miniature circuit breaker 14 is in the closed state and in the tripped state. The specific value is determined by the maximum allowable current and the minimum working current of the load circuit for normal operation. The single setting principle and calculation method are the same. The method steps of this embodiment can be adopted. The difference in preset parameters does not affect the detection and control method.

[0067] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A current detection control method for a power management system, which is implemented by using a power management system, wherein the power management system comprises a miniature circuit breaker (14) connected in series in a load circuit, wherein the miniature circuit breaker (14) is closed and / or tripped by an electric operating device (13) in an execution unit (12), wherein the execution unit (12) is electrically connected to a processing unit (3), wherein the processing unit (3) is electrically connected to a power module (1), a detection module (8) and a communication module (4), respectively; wherein the communication module (4) has a transmitting unit (5) for wireless communication with a cloud server (6); wherein the processing unit (7) is electrically connected to the detection module (8) via a detection signal processing unit (7), wherein the detection signal processing unit (8) is electrically connected to the detection module (8) and the communication module (4 ... The module (8) is composed of a strong current load detection unit (10) and a weak current load detection unit (9); a current limiting unit (2) for stabilizing the balanced current is also provided between the processing unit (3) and the power module (1); the processing unit (3) uses a single chip microcomputer of model STC15W415AS-TSSOP28 to exchange information with a cloud server (6) via a transmitting unit (5) for a signal from a detection signal processing unit (7), and then sends an action command signal to an execution unit (12), thereby controlling the on and off of the miniature circuit breaker (14); the processing unit (3) is also connected to a display unit (11) for displaying the fault state detected by the detection module (8); Features: The cloud server (6) further comprises a transceiver module for receiving information from the transmitting unit (5), and a storage module, a cleaning module, an analysis module and a comparison module which are sequentially connected to the transceiver module for communication, and the comparison module performs one-way information communication with the transceiver module; the control method comprises the following steps: Step S100, the collected current signal data Qn in the load circuit is transmitted to the transceiver module in the cloud server (6) through the transmitting unit (5), and the transceiver module sends the received current signal data Qn to the storage module for temporary storage; Step S200, the cleaning module calls the current signal data Qn from the storage module, identifies the labels Bn preset by the system for different emission units (5) in the current signal data Qn, and lists all the current signal data Qn corresponding to the labels Bn in sequence to form a current signal data stream QN under the labels Bn; Step S300, the analysis module removes the distorted negative and zero data of the current signal data stream QN in step S200 to obtain positive valid data QN+; Step S400, the comparison module compares the read positive valid data QN+ with the normal set data value range Nor (a, b) corresponding to the label Bn preset by the system as follows: If QN+-Nor / a is a negative value, the comparison module outputs a 'true' value and sends a tripping signal to the transceiver module; if QN+-Nor / a is a positive value, the comparison module outputs a 'false' value and continues to compare the next one until the comparison module outputs a 'true' value; If QN+-Nor / b is a negative value, the comparison module outputs 'false' and sends a trip or close execution signal to the transceiver module; if QN+-Nor / b is a positive value, the comparison module outputs 'true' and continues to compare the next one until the comparison module outputs 'false'; Step S500: After the transceiver module sends the execution electrical signal to the transmitting unit (5), the tripping or closing action is executed in sequence through the processing unit (3) and the execution unit (12).

2. The current detection control method of the power management system according to claim 1, characterized in that: The power module (1), the detection module (8), the communication module (4) and the execution unit (12) are an integrated housing structure and are connected to the miniature circuit breaker (14) by means of a snap-fit; the housing structure is provided with a power interface (19) of the power module (1), a communication interface (20) for implementing plug-in communication in RS485 mode, an antenna interface (21), a first detection interface (17), a second detection interface (18) and a signal conversion interface (40), as well as a card insertion slot (22) required by the transmitting unit (5); the housing structure is also provided with a digital tube (15) and an indicator diode (16) in the display unit (11) for displaying the detection status.

3. The current detection control method of the power management system according to claim 2, characterized in that: The electric operating device (13) is arranged inside the housing structure and is installed in a manner that fits closely with the miniature circuit breaker (14). The L-shaped swing arm (35) in the electric operating device (13) toggles the gate switch (33) through a lever (36) to achieve closing and / or tripping.

4. The current detection control method of the power management system according to claim 3, characterized in that: The electric operating device (13) comprises a motor (23), a worm (24), a first reduction gear (25), a second reduction gear (26), a third reduction gear (27), a fourth reduction gear (28) and an opening and closing mechanism for controlling the on and off of the miniature circuit breaker (14) which are sequentially driven and connected.

5. The current detection control method of the power management system according to claim 4, characterized in that: The opening and closing mechanism comprises a crescent ring (29) meshed and rotated with the third reduction gear (27); the crescent ring (29) is nested and clamped with a clutch (30) for combining or separating the rotational torque from the crescent ring (29); the clutch (30) moves the miniature circuit breaker (14) to achieve tripping / closing through an L-shaped swing arm (35) coaxially mounted and clamped.

6. The current detection control method of the power management system according to claim 5, characterized in that: At least one baffle (37) is arranged on the end surface of the crescent ring (29), an arc-shaped groove (34) for accommodating the baffle (37) is arranged on the end surface of the clutch (30), and a through hole for nesting the axial end of the L-shaped swing arm (35) is arranged at the axial center of the clutch (30).

7. The current detection control method of the power management system according to claim 6, characterized in that: The gate switch (33) on the miniature circuit breaker (14) is toggled by a lever (36) fixedly connected to the end of the L-shaped swing arm (35); the lever (36) rotates coaxially with the clutch member (30); the motor (23) performs forward and reverse rotations through forward and reverse electrical signals given by the processing unit (3), and the miniature circuit breaker (14) is switched on and off by driving the lever (36) to swing with the L-shaped swing arm (35) as a radius.

8. The current detection control method of the power management system according to claim 7, characterized in that: The electric operating device (13) further comprises a closing mode adjustment mechanism, specifically comprising an adjustment slide cover (31) slidably arranged on the housing structure of the electric operating device (13), one end of the lower surface of the adjustment slide cover (31) vertically extending downward to form a paddle (32), the paddle (32) being installed between the clutch (30) and the L-shaped swing arm (35), the paddle (32) realizing the combination or separation of the clutch (30) and the L-shaped swing arm (35) by sliding the adjustment slide cover (31) left and right; at least one pair of buckles (38) is arranged on the housing structure, and a buckle groove (39) cooperating with the buckle (38) is arranged on the miniature circuit breaker (14).

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