Three-phase low-voltage intelligent circuit breaker with load identification function

Abstract

The utility model discloses a three-phase low-voltage intelligent circuit breaker with a load identification function, which comprises a circuit breaker body, a power supply module and a control module respectively connected with the circuit breaker body and the power supply module. A, B and C three-phase current transformers and a zero sequence transformer are arranged on a three-phase loop of the circuit breaker body to collect A, B and C three-phase electric parameter data, and the control module processes the A, B and C three-phase electric parameter data and then uploads the data to a cloud end for storage. According to the utility model, the A, B and C three-phase current transformers and the zero sequence transformer are arranged on the three-phase loop of the circuit breaker, the load information of electric equipment is acquired, the electric equipment and a distribution line are monitored in real time through artificial intelligence and big data technologies, the electricity consumption behavior and the electricity consumption data of a user can be statistically analyzed and stored, and the electricity consumption data of the user can be stored in real time. And timely reporting and positioning of fault hidden dangers are realized, and management, operation and maintenance difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a three-phase low-voltage intelligent circuit breaker with load identification function. Background Technology

[0002] At present, the power grid supply is relatively complex, with a large number of electrical devices, some users have large power loads, and various types of mechanical equipment and high-power electrical appliances. The power distribution lines are in the stage of low power metering and metering, lacking line power safety monitoring and electrical safety cycle management, and cannot realize line monitoring and fault information reporting, resulting in great difficulty in management and operation and maintenance. Utility Model Content

[0003] The purpose of this utility model is to provide a three-phase low-voltage intelligent circuit breaker with load identification function that can monitor three-phase circuits in real time, and realize timely reporting and location of fault hazards.

[0004] The purpose of this utility model is achieved through the following technical measures: a three-phase low-voltage intelligent circuit breaker with load identification function, comprising a circuit breaker body, a power supply module and a control module, wherein the control module is connected to the circuit breaker body and the power supply module respectively, characterized in that three-phase current transformers and zero-sequence transformers of A, B and C are set on the three-phase circuit of the circuit breaker body to collect three-phase electrical parameter data of A, B and C, and the control module processes the three-phase electrical parameter data of A, B and C and uploads it to the cloud and saves it.

[0005] This utility model sets up A, B, and C three-phase current transformers and zero-sequence transformers on the three-phase circuit of the circuit breaker to collect load information of electrical equipment. Through artificial intelligence and big data technology, it can monitor electrical equipment and power distribution lines in real time, statistically analyze and store user electricity consumption behavior and electricity data, realize timely reporting and location of fault hazards, and reduce management and maintenance difficulties.

[0006] The power module of this utility model includes an input terminal, an AC-DC circuit, a DC step-down circuit, a DC-DC power chip, a filter circuit, and a DC output terminal. The input terminal is connected to one end of the AC-DC circuit, and the other end of the AC-DC circuit is connected to one end of the DC step-down circuit and one end of the DC-DC power chip, respectively. The other ends of the DC step-down circuit and the DC-DC power chip are connected to the filter circuit and the DC output terminal in sequence.

[0007] The control module of this utility model includes a power supply unit, a core processor unit, a data sampling and metering unit, a storage unit, a motor drive unit, a communication unit, and a tripping unit. The core processor unit is connected to the power supply unit, the data sampling and metering unit, the storage unit, the motor drive unit, the communication unit, and the tripping unit. The power supply unit is connected to the power module. The data sampling and metering unit receives A, B, and C three-phase electrical parameter data, converts them, and transmits them to the core processor unit. After processing by the core processor unit, the data is uploaded and stored through the communication unit.

[0008] The power module of this invention is equipped with a supercapacitor at its output end. Under normal operating conditions, the supercapacitor is fully charged and remains stable. When the current end loses power, the supercapacitor outputs power to ensure that the power failure data is stored, recorded, and uploaded, thus realizing the uploading of circuit breaker records, which is safe and reliable.

[0009] The circuit breaker body of this utility model has four poles: A, B, C, and N. Each pole consists of a moving and stationary contact unit, an arc-extinguishing chamber, a handle, a hot bimetallic strip, and an electromagnetic coil. Short-circuit protection and overload protection are provided on the three-phase four-wire main circuit.

[0010] The three-phase low-voltage intelligent circuit breaker of this utility model includes a communication module, which is connected to the power supply module. The communication module communicates with the communication unit of the control module via WiFi, and then converts the communication to 4G / 5G to upload data, so as to adapt to more applicable scenarios.

[0011] The data sampling and metering unit of this utility model adopts the HT7132 multi-functional high-precision three-phase power metering chip.

[0012] The core processor unit of this invention uses a high-precision STM32H750 chip.

[0013] The storage unit described in this utility model uses W9825G6KH and MT29F4G08ABAEAWP:E storage chips.

[0014] The motor drive unit described in this utility model uses the BL5612 chip.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] (1) This utility model sets up A, B, and C three-phase current transformers and zero-sequence transformers on the three-phase circuit of the circuit breaker to collect load information of electrical equipment. Through artificial intelligence and big data technology, it can monitor electrical equipment and power distribution lines in real time, and can statistically analyze and store user electricity consumption behavior and electricity data, realize timely reporting and location of fault hazards, and reduce management and maintenance difficulty.

[0017] (2) This utility model has a high-precision data acquisition function, which can effectively cut off dangerous events and dangerous loads, and identify common load types and report them to the cloud. It is stable in operation and has high safety and reliability. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a flowchart of the circuit process of the circuit breaker body of this utility model;

[0021] Figure 3 This is a structural block diagram of the power module of this utility model;

[0022] Figure 4 This is a block diagram of the composition of the control module of this utility model.

[0023] In the diagram: 1-Circuit breaker body, 2-Power supply module, 3-Control module. Detailed Implementation

[0024] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the protection scope of the present invention.

[0025] like Figures 1-4 As shown, this utility model discloses a three-phase low-voltage intelligent circuit breaker with load identification function, comprising a circuit breaker body 1, a power supply module 2, and a control module 3. The control module 3 is connected to both the circuit breaker body 1 and the power supply module 2. The circuit breaker body 1 and the control module 3 are connected together via a trip rod and a handle linkage, enabling simultaneous opening and closing operations. A three-phase current transformer (A, B, C) and a zero-sequence current transformer are installed on the three-phase circuit of the circuit breaker body 1 to collect three-phase electrical parameter data. The control module 3 processes the three-phase electrical parameter data and uploads it to the cloud for storage.

[0026] like Figure 4As shown, control module 3 includes a power supply unit, a core processor unit, a data sampling and metering unit, a storage unit, a motor drive unit, a tripping unit, and a communication unit. The core processor unit is connected to the power supply unit, the data sampling and metering unit, the storage unit, the motor drive unit, the tripping unit, and the communication unit. The power supply unit is connected to the power supply module. The data sampling and metering unit receives the three-phase electrical parameter data of A, B, and C, converts it, and then transmits it to the core processor unit. After processing by the core processor unit, the data is uploaded and stored through the communication unit.

[0027] Power module 2 supplies power to control module 3. Circuit breaker body 1 executes commands issued by control module 3 and provides data acquisition signals. The power supply unit of control module 3 is powered by DC 12V input from the power module, which powers the motor drive unit and, through a power conversion chip, converts it to 3.3V to power the core processor unit, data sampling and metering unit, storage unit, tripping unit, and wireless communication unit. The motor drive unit issues commands through the processor to electrically perform the opening and closing operations of the device. The data sampling and metering unit integrates multiple high-precision ADC data sampling, and sends the characteristic parameter data to the core processor unit through parsing. The storage unit stores these characteristic parameter data. The communication unit establishes network connections between devices and then connects to a cloud server to upload and save the device data to the cloud.

[0028] The data sampling and metering unit, through a three-phase voltage conditioning circuit and the circuit breaker's built-in A, B, and C phase current transformers and zero-sequence transformer, achieves individual sampling of the A, B, and C phase electrical parameters in the line. After conversion by the metering chip, the data is transmitted to the core processor unit for storage, uploading to the cloud server, and execution of judgment instructions. The data sampling and metering unit uses the HT7132 multi-functional high-precision three-phase energy metering chip, which integrates multiple second-order sigma-delta ADCs, a reference voltage circuit, and digital measurements of all power, energy, RMS, power factor, and frequency. The circuitry includes signal processing circuits, with active power measurement accuracy meeting 0.2S and 0.5S, satisfying the IEC's new 0.1S specification. It can also measure parameters such as phase current, effective voltage value, power factor, phase angle, and frequency, providing high-precision three-channel voltage and current measurement, achieving high data accuracy and reliability. The voltage input uses a voltage conditioning circuit to acquire the three-phase voltages of A, B, and C. The current input uses a high-precision current transformer to measure voltage, current, leakage current, power, quantity, frequency, fundamental wave, full wave, and harmonics. Internally, it interacts with the microcontroller via an SPI interface.

[0029] The wireless driver unit uses the ESP32 chip, which integrates Bluetooth 4.2 and WiFi HT40 technologies. It has a high-performance dual-core processor, supports ultra-low power standby, and is configured and controlled by receiving AT command sets from the serial port or SPI, enabling efficient communication between the module and the server.

[0030] The storage unit mainly stores sampled data, fault records, device models, and algorithm instructions; the storage unit uses W9825G6KH and MT29F4G08ABAEAWP:E storage chips, providing more space for data storage and code operation, integrating algorithm models inside, and storing and identifying power equipment parameter data.

[0031] The motor drive unit is equipped with a motor gear assembly, which is linked with the circuit breaker handle to achieve the electric closing of the circuit breaker; the motor drive unit uses a BL5612 chip, with low RDS(ON) to achieve efficient H-bridge output, supports PWM control, and has over-temperature and over-current protection, effectively protecting the normal operation of the motor and ensuring reliability.

[0032] The tripping unit is equipped with a tripper in the control module, and the core processor unit drives the tripper to act by issuing daily tripping instructions or fault instructions.

[0033] The wireless communication unit uploads the data processed by the core processor unit and the data in the storage unit to the cloud server, and based on load identification technology, corresponding loads or events are identified on the cloud server. The communication method of the circuit breaker body is defaulted to WiFi communication.

[0034] The core processor unit is connected to each unit, analyzes the load characteristic parameters through high-precision electrical quantity acquisition, combines algorithms, artificial intelligence, and big data technologies to analyze and manage the operating status, operating equipment, health status, and behavior habits of the equipment; the core processor unit uses a high-precision STM32H750 chip, adopts a six-stage pipeline, has built-in instruction and data Cache, integrates a JPEG codec, a double-precision hardware floating-point calculation unit, and DSP instructions, and the chip main frequency is up to 480Mhz. It can achieve fast data upload and efficient control, enhancing reliability and security.

[0035] Each pole of the circuit breaker body consists of a moving and static contact unit, an arc extinguishing chamber, a handle, a thermal bimetal, and an electromagnetic coil (the connection relationship of each component is the prior art), and there are four poles of A, B, C, and N in total; it conducts short-circuit protection and overload protection on the main circuit three-phase four-wire circuit. The circuit breaker body and the control module are spliced into the circuit breaker main body by rivets. The tripping rod of the control module is connected to the moving contact window on the left side of the circuit breaker body for linkage tripping; the closing is connected to the handle of the circuit breaker body through a triangular iron, and the gear group controls the motor closing. See Figure 2 The circuit breaker body supplies power to the main circuit, conducts short-circuit short-delay protection and overload long-delay protection on the power supply circuit; the power module supplies power to the intelligent circuit breaker body and the communication module in the form of bottom connectors.

[0036] This utility model relates to a three-phase low-voltage intelligent circuit breaker, which includes a communication module connected to the power supply module. The communication module communicates with the control module via WiFi through its communication unit, and then converts the communication to 4G / 5G for data transmission. The circuit breaker itself has a built-in Wi-Fi communication unit. The communication module is an external module added when Wi-Fi communication is not supported in the field. The data from the communication unit is transmitted to the communication module via the circuit breaker's Wi-Fi communication.

[0037] like Figure 3 As shown, power module 2 includes an input terminal, an AC-DC circuit, a DC step-down circuit, a DC-DC power chip, a filter circuit, and a DC output terminal. The input terminal is connected to one end of the AC-DC circuit, and the other end of the AC-DC circuit is connected to one end of the DC step-down circuit and one end of the DC-DC power chip. The other ends of the DC step-down circuit and the DC-DC power chip are connected to the filter circuit and the DC output terminal in sequence. The input terminal of power module 2 is connected to an external AC mains input interface, and the output terminal outputs +12V power to power the control module. The AC mains power is rectified and filtered at the input terminal to become DC voltage, which is then regulated by the DK124 power chip and a high-frequency transformer. The power chip receives output feedback to ensure that the high-frequency transformer maintains a stable DC 12V output voltage. The output voltage is filtered by the filter circuit and then output to power the control module and the communication module. The power module output terminal is equipped with a supercapacitor. Under normal operating conditions, the capacitor is fully charged and remains stable. When the current terminal loses power, the supercapacitor operates and outputs power to ensure that the data of power failure is stored, recorded, and uploaded, realizing the uploading of circuit failure records, which is safe and reliable.

[0038] This utility model has the function of high-precision acquisition of electrical quantities, and also has a wireless communication module. It can effectively identify specific loads such as electric vehicle batteries, electric heating rods, electric blankets, and kettles. It can alarm or cut off the power supply to designated loads, and communicate reliably with the server. It has remote upgrade and real-time software update functions, and meets the algorithm requirements for load identification in terms of computing power, communication and control.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A three-phase low-voltage intelligent circuit breaker with load identification function, comprising a circuit breaker body, a power supply module, and a control module, wherein the control module is connected to the circuit breaker body and the power supply module respectively, characterized in that: A three-phase current transformer and a zero-sequence transformer are installed on the three-phase circuit of the circuit breaker body to collect the three-phase electrical parameter data of A, B, and C. The control module processes the three-phase electrical parameter data of A, B, and C, uploads it to the cloud, and saves it.

2. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 1, characterized in that: The power module includes an input terminal, an AC-DC circuit, a DC step-down circuit, a DC-DC power chip, a filter circuit, and a DC output terminal. The input terminal is connected to one end of the AC-DC circuit, and the other end of the AC-DC circuit is connected to one end of the DC step-down circuit and one end of the DC-DC power chip, respectively. The other ends of the DC step-down circuit and the DC-DC power chip are connected to the filter circuit and the DC output terminal in sequence.

3. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 2, characterized in that: The control module includes a power supply unit, a core processor unit, a data sampling and metering unit, a storage unit, a motor drive unit, a communication unit, and a tripping unit. The core processor unit is connected to the power supply unit, the data sampling and metering unit, the storage unit, the motor drive unit, the communication unit, and the tripping unit. The power supply unit is connected to the power module. The data sampling and metering unit receives A, B, and C three-phase electrical parameter data, converts them, and transmits them to the core processor unit. The core processor unit processes the data and then uploads and stores it through the communication unit.

4. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 3, characterized in that: The circuit breaker body has four poles: A, B, C, and N. Each pole consists of a moving and stationary contact unit, an arc-extinguishing chamber, a handle, a hot bimetallic strip, and an electromagnetic coil. Short-circuit protection and overload protection are provided on the three-phase four-wire main circuit.

5. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 4, characterized in that: The power module has a supercapacitor at its output terminal.

6. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 5, characterized in that: The three-phase low-voltage intelligent circuit breaker includes a communication module, which is connected to the power supply module. The communication module communicates with the communication unit of the control module via WiFi, and then converts the communication to 4G / 5G for uploading.

7. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 6, characterized in that: The data sampling and metering unit uses the HT7132 multi-functional high-precision three-phase power metering chip.

8. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 7, characterized in that: The core processor unit uses a high-precision STM32H750 chip.

9. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 8, characterized in that: The storage unit uses W9825G6KH and MT29F4G08ABAEAWP:E storage chips.

10. The three-phase low-voltage intelligent circuit breaker with load identification function according to claim 9, characterized in that: The motor drive unit uses the BL5612 chip.

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