On-site intelligent load adjustment terminal and three-phase circuit imbalance adjustment method

Abstract

The application provides a local intelligent load adjustment terminal and a three-phase circuit imbalance adjustment method, and belongs to the technical field of power distribution. The terminal comprises a main body, a first controller, a second controller and a power supply arranged in the main body, and the second controller is electrically connected with the first controller. An information acquisition structure for acquiring current and voltage information of a three-phase circuit system end and a load end is further arranged on the main body. An action mechanism and a protection circuit unit are arranged in the main body, the action mechanism is electrically connected with the second controller, and the action mechanism is used for adjusting the phase sequence of the three-phase circuit system end and the load end. The protection circuit unit can prevent the load end from short circuiting during the adjustment of the phase sequence. The processing terminal integrates three-phase circuit system information acquisition and phase conversion processing, has a small structure, and can work without networking. Moreover, the terminal is provided with a protection circuit, so that the operation safety of the terminal and the reliability of power supply of the three-phase circuit load end can be ensured.

Description

Technical Field

[0001] This invention relates to the field of power distribution technology, and in particular to a localized intelligent load regulating terminal and a three-phase circuit imbalance regulation method. Background Technology

[0002] The large number of low-voltage distribution substations and the widespread, irregular consumption of single-phase loads lead to a common problem of three-phase load imbalance in low-voltage distribution networks. This imbalance results in significant power losses, substandard power quality, and can even cause power outages and create safety hazards. Energy conservation and loss reduction have become the focus of distribution network construction and renovation, and the three-phase imbalance problem has become one of the most pressing challenges in low-voltage distribution networks.

[0003] Existing discrete three-phase imbalance control systems consist of a main controller and commutators. The main controller, containing the commutation algorithm and strategy, is installed on the outgoing line side of the low-voltage distribution transformer to monitor the three-phase imbalance and issue commutation control commands. The commutators, the commutation mechanisms, are distributed and installed at the incoming line front end of single-phase power users to execute commutation commands. This type of device is relatively large, heavily reliant on communication signals, and unsuitable for rural power grids and densely built-up areas. However, rural power grids and densely built-up residential areas are crucial for ensuring people's livelihoods. Failure to effectively address three-phase imbalance in these areas will not only result in significant electricity waste but could also lead to serious safety accidents. Summary of the Invention

[0004] To overcome the problems existing in related technologies, one of the objectives of this invention is to provide a localized intelligent load regulation terminal. This processing terminal integrates three-phase circuit system information acquisition and commutation processing, has a compact structure, and can work without network connection. Moreover, the terminal is equipped with a protection circuit to ensure the safe operation of the terminal and the reliability of power supply to the load end of the three-phase circuit.

[0005] A localized intelligent load regulation terminal, comprising:

[0006] The main body includes a first controller, a second controller, and a power supply. The second controller is electrically connected to the first controller, and the power supply provides power to both the first and second controllers. The main body is equipped with an information acquisition structure for acquiring current and voltage information at the three-phase circuit system terminals and the load terminals. The information acquisition structure is electrically connected to the first controller.

[0007] The main body is equipped with an actuating mechanism and a protection circuit unit. The actuating mechanism is electrically connected to the second controller. The actuating mechanism is used to adjust the phase sequence between the three-phase circuit system terminal and the load terminal. The protection circuit unit can prevent short circuit at the load terminal during the phase sequence adjustment process.

[0008] In a preferred embodiment of the present invention, the second controller is provided with a signal driving circuit unit, and the actuating mechanism is electrically connected to the first controller through the signal driving circuit unit; the first controller sends a phase sequence adjustment signal to the signal driving circuit unit, and the signal driving circuit unit sends the phase sequence adjustment signal to the actuating mechanism, so that the actuating mechanism performs a phase sequence adjustment action.

[0009] In a preferred embodiment of the present invention, the protection circuit unit includes a logic gate circuit unit for judging the drive signal, a power management circuit unit for managing the circuit of the action mechanism, and a monitoring circuit unit for monitoring the load voltage and load current.

[0010] The actuation mechanism includes four sets of actuation circuits, each set of actuation circuits includes three magnetic latching relays, the three magnetic latching relays are electrically connected to phase A, phase B and phase C of the three-phase circuit respectively, and the logic gate circuit unit is used to determine the uniqueness of the signal driving the magnetic latching relays;

[0011] The power management circuit unit is disposed between the signal drive circuit unit and the first controller, and the power management circuit unit is electrically connected to the actuating mechanism; after the signal drive circuit unit sends an actuating signal, the power management circuit unit connects the power supply circuit of the actuating mechanism, so that the actuating mechanism starts to work.

[0012] The monitoring circuit unit is installed at the load end of the three-phase circuit to monitor the operating status of the voltage and current at the load end. When the voltage or current at the load end is abnormal, the monitoring circuit unit is disconnected.

[0013] In a preferred embodiment of the present invention, the first controller is provided with an MCU module, the MCU module is electrically connected to the information acquisition structure, and the MCU module performs unbalance analysis on the three-phase circuit based on the information fed back by the information acquisition structure.

[0014] In a preferred embodiment of the present invention, the main body is further provided with an intelligent auxiliary control unit, which is electrically connected to the first controller and the second controller, and is connected between the C phase and the output terminal of the three-phase circuit system.

[0015] In a preferred embodiment of the present invention, the power supply includes a storage battery, and the storage battery is electrically connected to the first controller and the second controller;

[0016] The battery is equipped with a humidity sensor, which is used to monitor the air humidity of the environment in which the battery is located. The humidity sensor is electrically connected to the first controller.

[0017] In a preferred embodiment of the present invention, the information acquisition structure includes a current acquisition device and a voltage acquisition device. The current acquisition device is used to acquire current information at the three-phase circuit system terminals and the load terminals; the voltage acquisition device is used to acquire current information at the three-phase circuit system terminals and the load terminals.

[0018] In a preferred embodiment of the present invention, the current collector is a switchable current collector, and the voltage collector is a switchable voltage collector.

[0019] The switchable current collector includes a collection body, which is provided with a flame-retardant layer.

[0020] In a preferred embodiment of the present invention, a network communication device is provided on the main body, and the network communication device is electrically connected to the first controller. The network communication device includes a Bluetooth communication module and an HPLC communication module.

[0021] The second objective of this invention is to provide a method for adjusting the imbalance of a three-phase circuit. This method employs a localized intelligent load regulating terminal as described above, and includes the following steps:

[0022] The system collects current and voltage information from the system end and load end of the three-phase power system and feeds the collected current and voltage information back to the first controller.

[0023] The first controller determines whether phase sequence adjustment is needed based on the current information; if so, phase sequence adjustment is performed.

[0024] After the phase sequence is adjusted, the first controller determines whether the phase sequence adjustment is correct based on the collected voltage information. If it is, the adjustment is complete; otherwise, the phase sequence adjustment continues until it is complete.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention provides a localized intelligent load regulating terminal and a three-phase circuit imbalance regulation method. The terminal includes a main body, within which are a first controller, a second controller, and a power supply. The second controller is electrically connected to the first controller, and the power supply powers both the first and second controllers. The main body is equipped with an information acquisition structure and an actuating mechanism for collecting current and voltage information from the three-phase circuit system and the load. This terminal can utilize both the three-phase circuit for its own power supply and the power supply for its operation, ensuring long-term stable operation and facilitating stable phase sequence regulation of the three-phase circuit. Furthermore, this terminal integrates three-phase circuit system information acquisition and commutation processing in a compact structure, operating without network connectivity. This avoids interference from the external environment, preventing instability and phase sequence regulation failure. Additionally, the terminal includes a protection circuit unit to ensure operational safety and the stability and reliability of the power supply to the load side of the three-phase circuit. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the localized intelligent load regulation terminal provided by the present invention;

[0028] Figure 2 This is a schematic diagram of the connection between the first controller and the second controller provided by the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the protection circuit unit provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the acquisition body provided by the present invention;

[0031] Figure 5 This is a schematic diagram of the logic gate circuit unit provided by the present invention;

[0032] Figure 6 This is a schematic diagram of the power management circuit unit provided by the present invention;

[0033] Figure 7 This is a schematic diagram of the monitoring circuit unit provided by the present invention;

[0034] Figure 8 This is a flowchart of the three-phase circuit imbalance adjustment method provided by the present invention.

[0035] Figure label:

[0036] 100. Main body; 200. Power supply; 210. Battery; 300. Information acquisition structure; 310. Current acquisition device; 320. Voltage acquisition device; 2101. Humidity sensor; 3101. Acquisition body; 3102. Flame retardant layer; 400. First controller; 410. MCU module; 420. Network communication device; 4201. Bluetooth communication module; 4202. HPLC communication module; 500. Second controller; 510. Signal drive circuit unit; 520. Protection circuit unit; 5201. Logic gate circuit unit; 5202. Power management circuit unit; 5203. Monitoring circuit unit; 530. Action mechanism; 600. Intelligent auxiliary control unit. Detailed Implementation

[0037] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0038] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” as used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0039] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] like Figures 1-7As shown, a localized intelligent load regulation terminal includes a main body 100. The main body 100 houses a first controller 400, a second controller 500, and a power supply 200. The second controller 500 is electrically connected to the first controller 400, and the power supply 200 supplies power to both the first controller 400 and the second controller 500. The main body 100 is equipped with an information acquisition structure 300, which is used to acquire current and voltage information from the three-phase circuit system terminals and the load terminals. The information acquisition structure 300 is electrically connected to the first controller 400.

[0041] The main body 100 is provided with an actuating mechanism 530 and a protection circuit unit 520. The actuating mechanism 530 is electrically connected to the second controller 500. The actuating mechanism 530 is used to adjust the phase sequence of the three-phase circuit system terminal and the load terminal. The protection circuit unit 520 can prevent short circuit at the load terminal during the phase sequence adjustment process.

[0042] Specifically, during operation, the intelligent load processing terminal can connect to a three-phase circuit via a power cord to power itself. Alternatively, it can be powered by a power supply 200 to supply power to the first controller 400 and the second controller 500, ensuring normal operation and stable phase sequence regulation even in the event of a three-phase power supply failure. The terminal operates by acquiring AC current and voltage information from the system and load sides of the three-phase circuit via the information acquisition structure 300, and feeding this information back to the first controller 400. The first controller 400 is equipped with an MCU module 410, which is electrically connected to the information acquisition structure 300. The MCU module 410 performs an imbalance analysis of the three-phase circuit based on the feedback from the information acquisition structure 300. The first controller 400 outputs a commutation command based on the analysis results, and the action mechanism 530 executes the commutation operation, ensuring that the voltages of each line on the system side and the load side of the three-phase power supply correspond to each other, thus overcoming the load imbalance problem.

[0043] The aforementioned localized intelligent load regulating terminal and three-phase circuit imbalance regulation method include a main body 100, within which are housed a first controller 400, a second controller 500, and a power supply 200. The second controller 500 is electrically connected to the first controller 400, and the power supply 200 supplies power to both the first controller 400 and the second controller 500. The main body 100 is equipped with an information acquisition structure 300 and an actuation mechanism 530 for collecting current and voltage information from the three-phase circuit system and the load. This terminal can utilize both the three-phase circuit for its own power supply and the power supply 200 for its operational power supply, ensuring long-term stable operation and facilitating stable three-phase circuit phase sequence regulation. Furthermore, this terminal integrates three-phase circuit system information acquisition and commutation processing in a compact structure, operating without network connectivity. This avoids external environmental interference, preventing instability and phase sequence regulation failure. In addition, the terminal is equipped with a protection circuit unit 520, which can ensure the safe operation of the terminal and the stability and reliability of the power supply to the load side of the three-phase circuit.

[0044] Furthermore, the second controller 500 is equipped with a signal driving circuit unit 510, and the actuation mechanism 530 is electrically connected to the first controller 400 through the signal driving circuit unit 510. The first controller 400 sends a phase sequence adjustment signal to the signal driving circuit unit 510, and the signal driving circuit unit 510 sends the phase sequence adjustment signal to the actuation mechanism 530, causing the actuation mechanism 530 to perform a phase sequence adjustment action. More specifically, the signal driving circuit unit 510 includes a differential amplifier, which amplifies the action signal sent by the first controller 400 and transmits it to the actuation mechanism 530, enabling the actuation mechanism 530 to clearly perceive the commutation action. The signal driving circuit unit 510 uses I / O signals.

[0045] In one specific embodiment, the protection circuit unit 520 includes a logic gate circuit unit 5201 for judging the drive signal, a power management circuit unit 5202 for managing the circuit of the action mechanism 530, and a monitoring circuit unit 5203 for monitoring the load voltage and load current.

[0046] The actuation mechanism 530 includes 4 sets of actuation circuits, each set of actuation circuits includes 3 magnetic latching relays, the 3 magnetic latching relays are electrically connected to phase A, phase B and phase C of the three-phase circuit respectively, and the logic gate circuit unit 5201 is used to determine the uniqueness of the signal driving the magnetic latching relays.

[0047] The three-phase circuit must not have short circuits between the three phases. Three magnetic latching relays are electrically connected to phases A, B, and C of the three-phase circuit, respectively. Each relay receives two drive command signals, resulting in six drive command signals during the commutation process. Only one of these six drive command signals is active at any given time. This application uses the logic gate circuit unit 5201 to ensure the uniqueness of these six signals at any given time. The power supply for the logic gate circuit can be a microcontroller.

[0048] The power management circuit unit 5202 is disposed between the signal drive circuit unit 510 and the first controller 400, and the power management circuit unit 5202 is electrically connected to the actuation mechanism 530; after the signal drive circuit unit 510 sends an actuation signal, the power management circuit unit 5202 connects the power supply circuit of the actuation mechanism 530, so that the actuation mechanism 530 starts to work.

[0049] In practical applications, the power supply circuit of the actuating mechanism 530 can be connected to a three-phase circuit or to the power supply 200. The first controller 400 controls the power management circuit to control its on / off state. After the signal drive circuit unit 510 issues an actuation command, the controller controls the power management circuit to connect the power supply circuit of the actuating mechanism 530. This ensures that the actuating mechanism 530 can perform phase sequence adjustment only when both the power supply and drive command are satisfied.

[0050] The monitoring circuit unit 5203 is installed at the load end of the three-phase circuit to monitor the operating status of the voltage and current at the load end. When the voltage or current at the load end is abnormal, the monitoring circuit unit 5203 is disconnected.

[0051] When adjusting the phase sequence, the system first keeps the magnetic latching relay of the current power supply phase open, and then closes the magnetic latching relay of the target power supply phase. During the opening, the voltage or current signal characteristics at the load end of the three-phase circuit will change abruptly. By monitoring the characteristics of the load end voltage or current, it is possible to effectively determine whether the opening is effective. Phase sequence adjustment is only performed after ensuring that the current power supply phase is definitely open and the magnetic latching relay of the target power supply phase is closed. This avoids three-phase short circuits caused by insufficient opening of the magnetic latching relay of the current power supply phase and the closed magnetic latching relay of the target power supply phase.

[0052] The protection circuit unit 520 of this application consists of three units, forming a triple circuit protection method during the phase sequence adjustment process of the terminal, which can ensure the safe and stable operation of the terminal.

[0053] In a preferred embodiment, the main body 100 further includes an intelligent auxiliary control unit 600, which is electrically connected to the first controller 400 and the second controller 500. The intelligent auxiliary control unit 600 is connected between the C-phase and the output terminal of the three-phase circuit system. More specifically, the intelligent auxiliary control unit 600 is a high-power magnetic latching relay connected between the C-phase and the output terminal of the three-phase circuit system. When the terminal is operating normally, the magnetic latching relay is in the open state. When the second controller 500 malfunctions, the terminal operates powered by the power supply 200, while the intelligent auxiliary control unit 600 closes the circuit, connecting the C-phase of the three-phase circuit system to the load terminal, effectively supplying power to the load using the C-phase. This prevents power outages from affecting the work and lives of electricity users and ensures the reliability of the three-phase circuit system's power supply.

[0054] Furthermore, the power supply 200 includes a storage battery 210, which is electrically connected to the first controller and the second controller;

[0055] The storage battery 210 is equipped with a humidity sensor 2101, which is used to monitor the air humidity of the environment in which the storage battery 210 is located. The humidity sensor 2101 is electrically connected to the first controller 400.

[0056] The humidity sensor 2101 is an infrared humidity sensor used to detect the water vapor environment around the battery 210. When the humidity around the battery 210 is too high, the first controller 400 will sound an alarm to remind the staff to take action and prevent the battery 210 from being in a high humidity environment for a long time and failing to work properly.

[0057] Furthermore, the information acquisition structure 300 includes a current acquisition unit 310 and a voltage acquisition unit 320. The current acquisition unit 310 is used to acquire current information at the three-phase circuit system terminals and the load terminals; the voltage acquisition unit 320 is used to acquire current information at the three-phase circuit system terminals and the load terminals. More specifically, the current acquisition unit 310 is a switchable current acquisition unit 310, and the voltage acquisition unit 320 is a switchable voltage acquisition unit 320. The switchable current acquisition unit 310 includes an acquisition body 3101, and a flame-retardant layer 3102 is provided on the acquisition body 3101.

[0058] The main structures of the current collector 310 and the voltage collector 320 can be the same, the difference being that the current collector 310 has a current transformer chip on its main body 100, and the voltage collector 320 has a voltage transformer chip on its main body 100. The openable design of the current collector 310 and voltage collector 320 facilitates installation. The flame-retardant layer is made of fire-resistant and flame-retardant rubber to improve the fire resistance of the collector body 3101.

[0059] In a preferred embodiment of the present invention, a network communication device 420 is provided on the main body 100. The network communication device 420 is electrically connected to the first controller. The network communication device 420 includes a Bluetooth communication module 4201 and an HPLC communication module 4202. The Bluetooth communication module 4201 is used for the installation, debugging, and parameter setting of the terminal, and the HPLC communication module 4202 is used for the terminal to interact with a remote data backend.

[0060] like Figure 8 As shown, the present invention also provides a method for adjusting the imbalance of a three-phase circuit, wherein the method is implemented using the localized intelligent load adjustment terminal described above, and the method includes the following steps:

[0061] S100: Collect current and voltage information from the system end and load end of the three-phase power system; and feed back the collected current and voltage information to the first controller 400.

[0062] S200 and the first controller 400 determine whether phase sequence adjustment is needed based on the current information. If so, phase sequence adjustment is performed.

[0063] S300. After phase sequence adjustment, the first controller 400 determines whether the phase sequence adjustment is correct based on the collected voltage information. If yes, the adjustment is complete; otherwise, the phase sequence adjustment continues until it is complete.

[0064] This method adjusts the phase sequence based on the current and voltage information at the system and load ends of the three-phase circuit system. After adjustment, it also judges whether the adjustment result is accurate, which can ensure the accuracy of phase sequence adjustment and ensure the stable operation of the three-phase circuit system.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0066] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0067] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A localized intelligent load regulation terminal, characterized in that, include: The main body (100) includes a first controller (400), a second controller (500), and a power supply (200). The second controller (500) is electrically connected to the first controller (400), and the power supply (200) supplies power to both the first controller (400) and the second controller (500). The main body (100) also includes an information acquisition structure (300) for acquiring current and voltage information from the three-phase circuit system terminals and the load terminals. The information acquisition structure (300) is electrically connected to the first controller (400). The main body (100) is provided with an actuating mechanism (530) and a protection circuit unit (520). The actuating mechanism (530) is electrically connected to the second controller (500). The actuating mechanism (530) is used to adjust the phase sequence of the three-phase circuit system terminal and the load terminal. The protection circuit unit (520) can prevent short circuit at the load terminal during the phase sequence adjustment process. The second controller (500) is provided with a signal driving circuit unit (510), and the actuation mechanism (530) is electrically connected to the first controller (400) through the signal driving circuit unit (510); the first controller (400) sends a phase sequence adjustment signal to the signal driving circuit unit (510), and the signal driving circuit unit (510) sends the phase sequence adjustment signal to the actuation mechanism (530), so that the actuation mechanism (530) performs the phase sequence adjustment action; The protection circuit unit (520) includes a logic gate circuit unit (5201) for judging the drive signal, a power management circuit unit (5202) for managing the circuit of the action mechanism (530), and a monitoring circuit unit (5203) for monitoring the load voltage and load current. The actuation mechanism (530) includes 4 sets of actuation circuits, each set of actuation circuits includes 3 magnetic latching relays, the 3 magnetic latching relays are electrically connected to phase A, phase B and phase C of the three-phase circuit respectively, and the logic gate circuit unit (5201) is used to determine the uniqueness of the signal driving the magnetic latching relays; The power management circuit unit (5202) is disposed between the signal drive circuit unit (510) and the first controller (400), and the power management circuit unit (5202) is electrically connected to the actuation mechanism (530); after the signal drive circuit unit (510) sends an actuation signal, the power management circuit unit (5202) connects the power supply circuit of the actuation mechanism (530), so that the actuation mechanism (530) starts to work; The monitoring circuit unit (5203) is installed at the load end of the three-phase circuit to monitor the operating status of the voltage and current at the load end. When the voltage or current at the load end is abnormal, the monitoring circuit unit (5203) is disconnected.

2. The localized intelligent load regulation terminal according to claim 1, characterized in that: The first controller (400) is equipped with an MCU module (410), which is electrically connected to the information acquisition structure (300). The MCU module (410) performs unbalance analysis on the three-phase circuit based on the information fed back by the information acquisition structure (300).

3. The localized intelligent load regulation terminal according to claim 1, characterized in that: The main body (100) is also provided with an intelligent auxiliary control unit (600), which is electrically connected to the first controller (400) and the second controller (500). The intelligent auxiliary control unit (600) is connected between the C phase and the output terminal of the three-phase circuit system.

4. The localized intelligent load regulation terminal according to any one of claims 1-3, characterized in that: The power supply (200) includes a storage battery (210), which is electrically connected to the first controller (400) and the second controller (500); The battery (210) is equipped with a humidity sensor (2101), which is used to monitor the air humidity of the environment in which the battery (210) is located. The humidity sensor (2101) is electrically connected to the first controller (400).

5. The localized intelligent load regulation terminal according to any one of claims 1-3, characterized in that: The information acquisition structure (300) includes a current acquisition unit (310) and a voltage acquisition unit (320). The current acquisition unit (310) is used to acquire current information at the three-phase circuit system end and the load end; the voltage acquisition unit (320) is used to acquire current information at the three-phase circuit system end and the load end.

6. The localized intelligent load regulation terminal according to claim 5, characterized in that: The current collector (310) is a switchable current collector (310), and the voltage collector (320) is a switchable voltage collector (320); The switchable current collector (310) includes a collection body (3101), and the collection body (3101) is provided with a flame-retardant layer (3102).

7. The localized intelligent load regulation terminal according to any one of claims 1-3, characterized in that: The main body (100) is provided with a network communication device (420), which is electrically connected to the first controller. The network communication device (420) includes a Bluetooth communication module (4201) and an HPLC communication module (4202).

8. A method for adjusting imbalance in a three-phase circuit, characterized in that: The method is implemented using the local intelligent load regulation terminal as described in any one of claims 1-7, and the method includes the following steps: Collect current and voltage information at the system end and load end of the three-phase power system; and feed back the collected current and voltage information to the first controller (400); The first controller (400) determines whether phase sequence adjustment is needed based on the current information. If so, phase sequence adjustment is performed. After the phase sequence is adjusted, the first controller (400) determines whether the phase sequence adjustment is correct based on the collected voltage information. If it is correct, the adjustment is completed; otherwise, the phase sequence adjustment continues until the phase sequence adjustment is completed.

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