Intelligent control circuit breaker

Abstract

The utility model relates to an intelligent regulation and control circuit breaker which comprises a frame circuit breaker execution unit and a central control module which are in communication connection, the frame circuit breaker execution unit transmits action information and collected information to the central control module, and the central control module is used for controlling the frame circuit breaker execution unit to act; the traveling wave detection unit is used for detecting traveling wave signals in the power line and transmitting the traveling wave signals to the central control module; the short-circuit line detection unit is used for detecting instantaneous large current of a three-phase line on the outgoing line side of the circuit breaker and transmitting the instantaneous large current to the central control module; and the partial discharge detection unit is used for detecting partial discharge of equipment in the power distribution cabinet and transmitting the partial discharge to the central control module. The circuit breaker can automatically open and close the circuit according to the state of the power distribution network, the circuit is protected, and the intelligent power distribution device can realize self-sensing, self-diagnosis, self-decision and self-recovery on various power grid disturbances under the condition that no or only a small amount of human intervention is needed.

Description

Technical Field

[0001] The present disclosure relates to an intelligent control circuit breaker, belonging to the technical field of circuit breakers. Background Art

[0002] The distribution network is directly connected to users, and its operating status is closely related to the power supply quality of users and the economic benefits of power supply enterprises. In order to reduce the consumption of fossil energy, renewable energy such as wind energy and solar energy is rapidly connected to the distribution network in large quantities in the form of distributed generation. At the same time, with the popularization and connection of new energy vehicles, the power supply end and the load end bring new challenges to the safe and economic operation of the distribution network. Therefore, developing intelligent distribution network self-healing control technology and coordinating and optimizing self-healing control measures are beneficial to solving problems such as low equipment utilization rate, low power supply reliability, and high line loss rate that have long existed in the distribution network.

[0003] As the "last mile" of the power system, the distribution link is the most closely related to users, and the vast majority of power system failures occur in the distribution network, which has the most direct impact on the overall efficiency of the power system and the power supply quality of users.

[0004] Compared with the traditional distribution network, distribution network intelligence, as the development direction of the future distribution network, can friendly accommodate a large number of renewable distributed power sources, microgrids, and energy storage, and can make full use of the output of distributed power sources to improve the power supply reliability of the system, improve the node voltage, reduce the line loss, postpone the grid investment, and reduce the use of fossil fuels.

[0005] As a widely used distribution electrical appliance, the low-voltage circuit breaker is an important electrical component in the low-voltage distribution system and plays an important role in power distribution and protecting circuits. It mainly realizes the functions of controlling normal power supply and cutting off fault current in the power supply and distribution system, so as to protect the safety of the power grid and electrical equipment. The low-voltage circuit breaker has a large short-circuit current breaking capacity and can achieve selective protection. It can not only connect or disconnect the load current under normal working conditions, but also automatically cut off the circuit under fault conditions (such as overcurrent, short circuit, undervoltage, etc.) to protect electrical equipment, cables, wires, etc.; after the fault is eliminated, the power supply can be quickly restored.

[0006] Before the circuit breaker automatically trips, it is necessary to detect the current in the circuit where it is located. In the prior art, the circuit breaker realizes the detection of short - circuit current and overload current respectively by an electromagnetic current transformer and a thermal bimetal sheet, and judges whether to trip according to the setting value. Once the detected current is greater than the setting value, it will automatically trip within the specified time limit. With the increasing requirements for power supply quality, an intelligent low - voltage circuit breaker is needed, which not only has traditional functions but also has a self - healing function, can record relevant fault information and store it in the device, provide a fast and accurate judgment basis for subsequent manual line restoration, and has a line fault early warning function, upload historical information data to the backend platform to realize early prediction of faults. For basic line fault problems, it can automatically switch after power supply is restored, without the need for personnel to go to the site for secondary power restoration. Summary of the Invention

[0007] To overcome the above problems, the present disclosure provides an intelligent control circuit breaker. The mechanical and electrical installation frame has a simple structure, is convenient to disassemble, and its components are replaceable, suitable for the installation of different specifications of mechanical and electrical equipment.

[0008] The technical solution of the present disclosure is as follows:

[0009] An intelligent control circuit breaker includes a frame circuit breaker execution unit and a central control module connected by communication. The frame circuit breaker execution unit transmits action information and collected information to the central control module, and further includes:

[0010] The central control module is used to control the action of the frame circuit breaker execution unit;

[0011] A traveling - wave detection unit, which is used to detect the traveling - wave signal in the power line and transmit it to the central control module;

[0012] A short - circuit line detection unit, which is used to detect the instantaneous large current of the three - phase lines on the outgoing side of the circuit breaker and transmit it to the central control module;

[0013] A partial discharge detection unit, which is used to detect the partial discharge of the equipment in the distribution cabinet and transmit it to the central control module;

[0014] The traveling - wave detection unit includes a first input unit, a first clamping protection unit, a first current - voltage conversion and signal conditioning unit, a first reference voltage generation unit and a first output unit;

[0015] The first input unit includes a first voltage transformer. The high - voltage side of the first voltage transformer is connected to an external power supply, the low - voltage side is connected to the first clamping protection unit, and the first voltage transformer is connected to the live wire of the external power supply through a series - connected first resistor and second resistor;

[0016] The first clamping protection unit includes a first clamping diode and a second clamping diode which are respectively connected in parallel to the output end of the voltage transformer, and the conduction directions of the first clamping diode and the second clamping diode are opposite;

[0017] The first current-voltage conversion and signal conditioning unit includes a first operational amplifier. The inverting input terminal of the first operational amplifier is connected to the live wire of the output end of the first voltage transformer, and the non-inverting input terminal is connected to the neutral wire of the output end of the first voltage transformer and the reference voltage VREF. A third resistor and a first capacitor are connected in series and then connected in parallel between the inverting input terminal and the output terminal of the first operational amplifier. A fourth resistor and a fifth resistor are connected in series and then connected in parallel between the inverting input terminal and the output terminal of the operational amplifier;

[0018] The first reference voltage generating unit includes a second operational amplifier. The non-inverting input terminal of the second operational amplifier is connected to the power supply through a sixth resistor, grounded through a seventh resistor, and grounded through a second capacitor. The inverting input terminal is connected to the output terminal. The negative power supply terminal is grounded, the positive power supply terminal is connected to the power supply VDDA through an eighth resistor and grounded through a third capacitor, and the output terminal is grounded through a fourth capacitor;

[0019] The first output unit includes a ninth resistor and a fifth capacitor. The output terminal of the first operational amplifier is grounded successively through the ninth resistor and the fifth capacitor.

[0020] Further, the short-circuit line detection unit includes a second input unit, a second clamping protection unit, a second current-voltage conversion and signal conditioning unit, and a second output unit;

[0021] The second input unit includes a second voltage transformer, a third voltage transformer, and a fourth voltage transformer. The high-voltage sides of the second voltage transformer, the third voltage transformer, and the fourth voltage transformer are respectively connected to the A phase, B phase, and C phase of the three-phase alternating current. The low-voltage sides are respectively connected in parallel with two clamping diodes with opposite conduction directions, serving as the second clamping protection unit. The neutral wire of the low-voltage side is connected to the reference voltage VREF;

[0022] The second current-voltage conversion and signal conditioning unit includes a third operational amplifier, a fourth operational amplifier, and a fifth operational amplifier. The inverting inputs of the third, fourth, and fifth operational amplifiers are respectively connected to the live wires on the low-voltage sides of the second voltage transformer, the third voltage transformer, and the fourth voltage transformer, and the non-inverting inputs are connected to the reference voltage VREF. A tenth resistor and a sixth capacitor are connected in series and then paralleled between the inverting input and the output of the third operational amplifier, and an eleventh resistor and a twelfth resistor are connected in series and then paralleled between the inverting input and the output of the third operational amplifier. A nineteenth resistor and an eleventh capacitor are connected in series and then paralleled between the inverting input and the output of the fourth operational amplifier, and a twentieth resistor and a twenty-first resistor are connected in series and then paralleled between the inverting input and the output of the fourth operational amplifier. A twenty-second resistor and a twelfth capacitor are connected in series and then paralleled between the inverting input and the output of the fifth operational amplifier, and a twenty-third resistor and a twenty-fourth resistor are connected in series and then paralleled between the inverting input and the output of the fifth operational amplifier.

[0023] The second output unit is specifically that the output of the third operational amplifier is grounded through a thirteenth resistor and a seventh capacitor in sequence, the output of the fourth operational amplifier is grounded through a twenty-fifth resistor and a thirteenth capacitor in sequence, and the output of the fifth operational amplifier is grounded through a twenty-sixth resistor and a fourteenth capacitor in sequence.

[0024] Further, the partial discharge detection unit includes a fifth voltage transformer and a sixth operational amplifier;

[0025] The high-voltage side of the fifth voltage transformer is connected to an external power supply, and a fourteenth resistor, a fifteenth resistor, and an eighth capacitor are provided between the live wire terminal of the high-voltage side of the fifth voltage transformer and the external power supply;

[0026] Two clamping diodes with opposite conduction directions and a sixteenth resistor are paralleled on the low-voltage side of the fifth voltage transformer, and the zero line segment of the low-voltage side of the fifth voltage transformer is grounded.

[0027] The inverting input of the fifth operational amplifier is connected to the reference voltage VREF through a seventeenth resistor, grounded through an eighteenth resistor, and grounded through a ninth capacitor, and the non-inverting input is connected to the live wire terminal of the low-voltage side of the fifth voltage transformer through a tenth capacitor.

[0028] Further, it further includes a battery power supply unit, which includes an external power supply and a backup battery, and the backup battery supplies power to the circuit breaker when the external power supply is cut off.

[0029] Further, it further includes a screen interaction unit, and the screen interaction unit is communicatively connected to the central control module.

[0030] Further, the central control module includes a processor, a memory, and a weak signal operational amplifier circuit.

[0031] The present disclosure has the following beneficial effects:

[0032] The present disclosure can automatically open and close the circuit according to the state of the distribution network. While protecting the circuit, the distribution intelligent device can achieve self - perception, self - diagnosis, self - decision - making, and self - recovery for various power grid disturbances with little or no human intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the modules of an embodiment of the present disclosure.

[0034] Figure 2 It is a circuit diagram of the traveling - wave detection unit of an embodiment of the present disclosure.

[0035] Figure 3 It is a circuit diagram of the short - circuit line detection unit of an embodiment of the present disclosure.

[0036] Figure 4 It is a circuit diagram of the partial discharge detection unit of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the described embodiments of the present disclosure fall within the scope of protection of the present disclosure.

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should have the ordinary meaning understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly. To keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits the detailed descriptions of some known functions and known components.

[0039] The present disclosure will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Referring to Figure 1 , an intelligent control circuit breaker includes a frame circuit breaker execution unit and a central control module connected by communication. The frame circuit breaker execution unit transmits action information and collected information to the central control module, and further includes:

[0041] The central control module is used to control the action of the frame circuit breaker execution unit;

[0042] A traveling wave detection unit, which is used to detect the traveling wave signal in the power line and transmit it to the central control module;

[0043] A short-circuit line detection unit, which is used to detect the instantaneous large current of the three-phase line on the outlet side of the circuit breaker and transmit it to the central control module;

[0044] A partial discharge detection unit, which is used to detect the partial discharge of the equipment in the power distribution cabinet and transmit it to the central control module.

[0045] Referring to Figure 2 , in an embodiment of the present disclosure, the traveling wave detection unit includes a first input unit, a first clamping protection unit, a first current-voltage conversion and signal conditioning unit, a first reference voltage generation unit, and a first output unit;

[0046] The first input unit includes a first voltage transformer (such as Figure 2 T1 in Figure 2 ). The high-voltage side of the first voltage transformer is connected to an external power supply, the low-voltage side is connected to the first clamping protection unit, and the first voltage transformer is connected to the live wire of the external power supply through a series-connected first resistor and second resistor (such as

[0047] R1 and R2 in Figure 2 );

[0048] The first clamping protection unit includes a first clamping diode and a second clamping diode (such as Figure 2 D1 and D2 in Figure 2 ) respectively connected in parallel at the output end of the voltage transformer. The conduction directions of the first clamping diode and the second clamping diode are opposite; Figure 2C2) are connected in series and then connected in parallel between the inverting input terminal and the output terminal of the first operational amplifier. The fourth resistor and the fifth resistor (such as Figure 2 R5 and R8 in

[0049] The first reference voltage generating unit includes a second operational amplifier (such as Figure 2 IC1D in Figure 2 The non-inverting input terminal of the second operational amplifier is connected to the power supply through the sixth resistor (such as Figure 2 R3 in Figure 2 is grounded through the seventh resistor (such as Figure 2 R4 in Figure 2 is grounded through the second capacitor (such as Figure 2 C1 in

[0050] The first output unit includes a ninth resistor (such as Figure 2 R9 in Figure 2 and a fifth capacitor (such as

[0051] The traveling wave detection technology is based on the traveling wave propagation characteristics generated when a fault occurs in a transmission line. When a fault occurs in the power system, such as a short circuit or a grounding fault, a traveling wave will be generated that propagates along the transmission line. These traveling waves carry information about the fault location, and the fault distance can be calculated by measuring the time difference of the traveling wave propagating from the fault point to the monitoring point.

[0052] In the circuit design, the first voltage transformer, the clamping diode, the first operational amplifier, and the second operational amplifier work together to ensure the effective acquisition and processing of the traveling wave signal. This enables the single-chip microcomputer to perform accurate traveling wave fault location based on the collected data, thereby quickly responding to and repairing problems in the power system.

[0053] Figure 2 Ain_A in

[0054] Reference Figure 3 , in an embodiment of the present disclosure, the short-circuit line detection unit includes a second input unit, a second clamping protection unit, a second current-voltage conversion and signal conditioning unit, and a second output unit;

[0055] The second input unit includes a second voltage transformer, a third voltage transformer, and a fourth voltage transformer (such asFigure 3 Among T2, T3, and T4), the high-voltage sides of the second voltage transformer, the third voltage transformer, and the fourth voltage transformer are respectively connected to the A phase, B phase, and C phase of the three-phase alternating current, and two clamping diodes with opposite conduction directions are respectively connected in parallel on the low-voltage sides (such as Figure 3 D3~D8 in), serving as the second clamping protection unit, and the neutral line on the low-voltage side is connected to the reference voltage VREF;

[0056] The second current-voltage conversion and signal conditioning unit includes a third operational amplifier, a fourth operational amplifier, and a fifth operational amplifier (such as Figure 3 IC1A, IC1B, IC1C in), the inverting inputs of the third operational amplifier, the fourth operational amplifier, and the fifth operational amplifier are respectively connected to the live wires on the low-voltage sides of the second voltage transformer, the third voltage transformer, and the fourth voltage transformer, and the non-inverting inputs are connected to the reference voltage VREF; The tenth resistor (such as Figure 3 R12 in) and the sixth capacitor (such as Figure 3 C11 in) are connected in series and then connected in parallel between the inverting input and the output of the third operational amplifier. The eleventh resistor (such as Figure 3 R11 in) and the twelfth resistor (such as Figure 3 R17 in) are connected in series and then connected in parallel between the inverting input and the output of the third operational amplifier; The nineteenth resistor (such as Figure 3 R14 in) and the eleventh capacitor (such as Figure 3 C10 in) are connected in series and then connected in parallel between the inverting input and the output of the fourth operational amplifier. The twentieth resistor (such as Figure 3 R13 in) and the twenty-first resistor (such as Figure 3 R18 in) are connected in series and then connected in parallel between the inverting input and the output of the fourth operational amplifier; The twenty-second resistor (such as Figure 3 R16 in) and the twelfth capacitor (such as Figure 3 C9 in) are connected in series and then connected in parallel between the inverting input and the output of the fifth operational amplifier. The twenty-third resistor (such as Figure 3 R15 in) and the twenty-fourth resistor (such as Figure 3 R19 in) are connected in series and then connected in parallel between the inverting input and the output of the fifth operational amplifier;

[0057] The second output unit specifically is that the output of the third operational amplifier is grounded through the thirteenth resistor (such as Figure 3 R10 in) and the seventh capacitor (such as Figure 3 C8 in) in sequence. The output of the fourth operational amplifier is grounded through the twenty-fifth resistor (such as Figure 3 R20 in) and the thirteenth capacitor (such as Figure 3The C7) in it is grounded at the back, and the output terminal of the fifth operational amplifier is successively grounded after passing through the twenty-sixth resistor (such as Figure 3 the R21 in it) and the fourteenth capacitor (such as Figure 3 the C6 in it).

[0058] The second voltage transformer, the third voltage transformer and the fourth voltage transformer are used to detect three-phase alternating current (phase A, phase B, phase C). Their function is to convert the large current on the high-voltage side into a small current on the low-voltage side, so as to facilitate measurement and processing by subsequent circuits. At the same time, the transformer also provides electrical isolation to ensure the safety of measurement.

[0059] The second clamping protection unit is used to prevent high voltage from damaging the components in the subsequent circuit. There is a pair of clamping diodes at the positive and negative output terminals of each phase, ensuring that the voltage will not exceed the safe range under any circumstances. This design is very important for protecting the circuit from abnormally high voltage.

[0060] Figure 3 The la+, lb+ and lc+ in it represent the live wire ports of the three-phase AC input, and la-, lb- and lc- represent the neutral wire ports of the three-phase AC input. lA_P, lB_P and lC_P are the live wires on the low-voltage side of the second voltage transformer, the third voltage transformer and the fourth voltage transformer respectively, and lA_N, lB_N and lC_N are the neutral wires on the low-voltage side of the second voltage transformer, the third voltage transformer and the fourth voltage transformer respectively. Ain_lA, Ain_lB and Ain_lC are all the output terminals of the short-circuit line detection unit.

[0061] When a short-circuit fault occurs in the power system, the current in the line will increase sharply, far exceeding the normal working current. By detecting this instantaneous large current, the short-circuit fault can be discovered and located in time, so as to take corresponding protection measures to avoid the expansion of the accident.

[0062] Instantaneous large current detection: This circuit monitors the current changes of the three-phase lines in real time through the second voltage transformer, the third voltage transformer and the fourth voltage transformer. Once the detected current exceeds the preset threshold, it indicates that a short-circuit fault may have occurred.

[0063] When in use, the detected current signal is converted and conditioned by I / V, and then sampled and quantized by the ADC of the single-chip microcomputer. The single-chip microcomputer calculates the effective value and peak value of each-phase current according to the collected data, and compares them with the set threshold. If it is found that the current of a certain phase exceeds the threshold, the single-chip microcomputer will immediately send an alarm signal to the central control module to notify it to take corresponding protection actions, such as cutting off the faulty line, etc.

[0064] In an embodiment of the present disclosure, the partial discharge detection unit includes a fifth voltage transformer (such as Figure 4The fifth operational amplifier (such as T5) and the sixth operational amplifier (such as IC2A in Figure 4 IC2A);

[0065] The high - voltage side of the fifth voltage transformer is connected to an external power supply, and a fourteenth resistor, a fifteenth resistor and an eighth capacitor (such as R23, R24, C13 in Figure 4 are provided between the high - voltage side live wire terminal of the fifth voltage transformer and the external power supply);

[0066] Two clamping diodes with opposite conduction directions (such as D9, D10 in Figure 4 ) and a sixteenth resistor (such as R25 in Figure 4 ) are connected in parallel on the low - voltage side of the fifth voltage transformer, and the zero - line segment of the low - voltage side of the fifth voltage transformer is grounded.

[0067] The inverting input terminal of the fifth operational amplifier is connected to the reference voltage VREF through a seventeenth resistor (such as R22 in Figure 4 ), grounded through an eighteenth resistor (such as R26 in Figure 4 ), grounded through a ninth capacitor (such as C12 in Figure 4 ), and the non - inverting input terminal is connected to the live - wire terminal of the low - voltage side of the fifth voltage transformer through a tenth capacitor (such as C14 in Figure 4 ).

[0068] Figure 4 L1 and L2 in

[0069] are the live wire and the zero line of the detection position respectively.

[0070] In an embodiment of the present disclosure, a battery - powered unit is further included. The battery - powered unit includes an external power supply and a backup battery, and the backup battery supplies power to the circuit breaker when the external power supply is cut off.

[0071] In an embodiment of the present disclosure, a screen interaction unit is further included, and the screen interaction unit is communicatively connected to the central control module.

[0072] In an embodiment of the present disclosure, the central control module includes a processor, a memory and a weak - signal operational amplifier circuit.

[0073] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in an order different from that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0074] The units described in the embodiments of the present disclosure can be implemented in software or in hardware. In this case, the name of the unit does not constitute a limitation on the unit itself.

[0075] The functions described above can be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that can be used include: Field Programmable Gate Arrays (FPGA), Application Specific Integrated Circuits (ASIC), Application Specific Standard Products (ASSP), System on Chip (SOC), Complex Programmable Logic Devices (CPLD), and so on.

[0076] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosure concept. For example, technical solutions formed by mutually replacing the above features with (but not limited to) technical features having similar functions disclosed in the present disclosure.

[0077] In addition, although the operations are depicted in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or in a sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the present disclosure. Certain features described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments.

[0078] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

[0079] For the present disclosure, the following points also need to be noted:

[0080] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures may refer to the general design.

[0081] (2) Without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments.

[0082] The above are only the embodiments of the present disclosure, and do not limit the patent scope of the present disclosure accordingly. Any equivalent structures made by using the specification and drawings of the present disclosure, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present disclosure.

Claims

1. An intelligent control circuit breaker, comprising a frame circuit breaker execution unit and a central control module connected by communication. The frame circuit breaker execution unit transmits action information and acquired information to the central control module, characterized in that, It further includes: The central control module is used to control the action of the frame circuit breaker execution unit; A traveling wave detection unit, which is used to detect the traveling wave signal in the power line and transmit it to the central control module; A short-circuit line detection unit, which is used to detect the instantaneous large current of the three-phase line on the outgoing side of the circuit breaker and transmit it to the central control module; A partial discharge detection unit, which is used to detect the partial discharge of the equipment in the power distribution cabinet and transmit it to the central control module; The traveling wave detection unit includes a first input unit, a first clamping protection unit, a first current-voltage conversion and signal conditioning unit, a first reference voltage generation unit and a first output unit; The first input unit includes a first voltage transformer. The high-voltage side of the first voltage transformer is connected to an external power supply, and the low-voltage side is connected to the first clamping protection unit. And the first voltage transformer is connected to the live wire of the external power supply through a series-connected first resistor and second resistor; The first clamping protection unit includes a first clamping diode and a second clamping diode respectively connected in parallel at the output end of the voltage transformer. The conduction directions of the first clamping diode and the second clamping diode are opposite; The first current-voltage conversion and signal conditioning unit includes a first operational amplifier. The inverting input terminal of the first operational amplifier is connected to the live wire of the output end of the first voltage transformer, and the non-inverting input terminal is connected to the neutral wire of the output end of the first voltage transformer and the reference voltage VREF. A third resistor and a first capacitor are connected in series and then connected in parallel between the inverting input terminal and the output terminal of the first operational amplifier. A fourth resistor and a fifth resistor are connected in series and then connected in parallel between the inverting input terminal and the output terminal of the operational amplifier; The first reference voltage generation unit includes a second operational amplifier. The non-inverting input terminal of the second operational amplifier is connected to the power supply through a sixth resistor, grounded through a seventh resistor, grounded through a second capacitor. The inverting input terminal is connected to the output terminal, the negative power supply terminal is grounded, the positive power supply terminal is connected to the power supply VDDA through an eighth resistor, grounded through a third capacitor, and the output terminal is grounded through a fourth capacitor; The first output unit includes a ninth resistor and a fifth capacitor. The output terminal of the first operational amplifier is grounded in sequence through the ninth resistor and the fifth capacitor.

2. The intelligent control circuit breaker according to claim 1, characterized in that, The short-circuit line detection unit includes a second input unit, a second clamping protection unit, a second current-voltage conversion and signal conditioning unit and a second output unit; The second input unit includes a second voltage transformer, a third voltage transformer and a fourth voltage transformer. The high-voltage sides of the second voltage transformer, the third voltage transformer and the fourth voltage transformer are respectively connected to the A phase, B phase and C phase of the three-phase alternating current. The low-voltage sides are respectively connected in parallel with two clamping diodes with opposite conduction directions as the second clamping protection unit. The neutral wire of the low-voltage side is connected to the reference voltage VREF; The second current-voltage conversion and signal conditioning unit includes a third operational amplifier, a fourth operational amplifier, and a fifth operational amplifier. The inverting inputs of the third operational amplifier, the fourth operational amplifier, and the fifth operational amplifier are respectively connected to the live wires on the low-voltage sides of the second voltage transformer, the third voltage transformer, and the fourth voltage transformer, and the non-inverting inputs are connected to the reference voltage VREF; a tenth resistor and a sixth capacitor are connected in series and then paralleled between the inverting input and the output of the third operational amplifier, and an eleventh resistor and a twelfth resistor are connected in series and then paralleled between the inverting input and the output of the third operational amplifier; a nineteenth resistor and an eleventh capacitor are connected in series and then paralleled between the inverting input and the output of the fourth operational amplifier, and a twentieth resistor and a twenty-first resistor are connected in series and then paralleled between the inverting input and the output of the fourth operational amplifier; a twenty-second resistor and a twelfth capacitor are connected in series and then paralleled between the inverting input and the output of the fifth operational amplifier, and a twenty-third resistor and a twenty-fourth resistor are connected in series and then paralleled between the inverting input and the output of the fifth operational amplifier; The second output unit is specifically that the output terminal of the third operational amplifier is grounded through a thirteenth resistor and a seventh capacitor in sequence, the output terminal of the fourth operational amplifier is grounded through a twenty-fifth resistor and a thirteenth capacitor in sequence, and the output terminal of the fifth operational amplifier is grounded through a twenty-sixth resistor and a fourteenth capacitor in sequence.

3. The intelligent control circuit breaker according to claim 2, wherein The partial discharge detection unit includes a fifth voltage transformer and a sixth operational amplifier; The high-voltage side of the fifth voltage transformer is connected to an external power supply, and a fourteenth resistor, a fifteenth resistor, and an eighth capacitor are provided between the live wire terminal of the high-voltage side of the fifth voltage transformer and the external power supply; Two clamping diodes with opposite conduction directions and a sixteenth resistor are connected in parallel on the low-voltage side of the fifth voltage transformer, and the neutral line segment of the low-voltage side of the fifth voltage transformer is grounded; The inverting input of the fifth operational amplifier is connected to the reference voltage VREF through a seventeenth resistor, grounded through an eighteenth resistor, grounded through a ninth capacitor, and the non-inverting input is connected to the live wire terminal of the low-voltage side of the fifth voltage transformer through a tenth capacitor.

4. The intelligent control circuit breaker according to claim 1, wherein It further includes a battery power supply unit, and the battery power supply unit includes an external power supply and a backup battery, and the backup battery supplies power to the circuit breaker when the external power supply is cut off.

5. The intelligent control circuit breaker according to claim 1, wherein It further includes a screen interaction unit, and the screen interaction unit is communicatively connected to the central control module.

6. The intelligent control circuit breaker according to claim 1, wherein The central control module includes a processor, a memory, and a weak signal operational amplifier circuit.

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