A circuit and method for constant output power regulation in distribution networks based on solid-state switches

Abstract

This application relates to the technical field of circuit devices for AC power distribution networks, and discloses a constant output power adjustment circuit and method for power distribution networks based on solid-state switches. The circuit includes a current parameter acquisition module for acquiring current metering data and voltage parameter data in the output power distribution line; a load identification module for identifying the load type of the output circuit; an interaction module for displaying electrical parameter information; a main control module for outputting power adjustment control signals based on the current metering data, voltage parameter data, and load type of the power distribution line; a drive module for receiving and responding to the power adjustment control signals and outputting drive control signals to control the switching module's on / off state; and a switch module for receiving and responding to the drive control signals to control the load's energization state. The switch module includes at least one set of solid-state switches composed of two MOSFETs connected in reverse series. This solution can maintain a constant power output in the power distribution network according to the load type, avoiding energy loss caused by switching the line on and off.

Description

Technical Field

[0001] This application relates to the field of circuit devices for AC power distribution networks, and in particular to a constant output power adjustment circuit and method for power distribution networks based on solid-state switches. Background Technology

[0002] In power distribution networks, maintaining constant output power is a key requirement for ensuring power system stability and improving energy efficiency. With the rapid development of industrial automation, smart grids, and new energy grid integration technologies, problems such as frequent load fluctuations, increased nonlinear loads, and fires caused by overheating of wires and internal short circuits in electrical appliances due to severe loads are becoming increasingly prominent. Traditional power regulation technologies are no longer sufficient to meet the requirements of high precision, high response speed, and low harmonic interference. Summary of the Invention

[0003] To address the problems existing in power regulation technology in practical applications, the first objective of this application is to provide a constant output power regulation circuit for power distribution networks based on solid-state switches. This circuit can maintain a constant power output in the power distribution network according to the load type, avoiding energy loss during line opening and closing. Furthermore, by utilizing solid-state switches mainly composed of MOSFETs for control, it enables microsecond-level response protection for the load and lines. Based on the above power regulation circuit, the second objective of this application is to propose a constant output power regulation method for power distribution networks based on solid-state switches, the specific scheme of which is as follows:

[0004] A constant output power regulation circuit for a power distribution network based on solid-state switches, comprising:

[0005] The current parameter acquisition module is coupled to the power distribution line and is used to acquire and output current metering data and voltage parameter data in the power distribution line.

[0006] The load identification module is electrically connected to the current parameter acquisition module. Based on the current measurement data and voltage parameter data, combined with a specific algorithm model, it identifies and outputs the circuit load type.

[0007] The interaction module is electrically connected to the main control module and external interaction components. It is used to receive and display electrical parameter information, as well as to receive external mode selection commands and input them to the main control module.

[0008] The main control module is electrically connected to the current parameter acquisition module, the load identification module and the interaction module. It is used to acquire and automatically or based on the mode selection command, output power adjustment control signals to control the on / off state of the switch module according to the current metering data, voltage parameter data and load type of the power distribution line.

[0009] The drive module is electrically connected to the main control module and the switch module, and receives and responds to the power adjustment control signal to output a drive control signal to control the on / off state of the switch module;

[0010] A switch module is installed between the power distribution line and the load and is controlled and connected to the drive module. It receives and responds to the drive control signal to control the power-on state of the load.

[0011] The power control signal includes a voltage regulation power control signal, a fixed-period power control signal, or a single-cycle power control signal.

[0012] The switching module includes at least one set of solid-state switches configured on the power distribution line and consisting of two MOSFETs connected in reverse series. The gates of the two MOSFETs are respectively coupled to the drive control signal output by the drive module.

[0013] The above technical solution enables the power distribution network to maintain a constant power output after the load is connected to the circuit, avoiding energy loss caused by the opening and closing of the line. Furthermore, by using solid-state switches mainly composed of MOSFETs for on / off control, the load and line can be protected with microsecond-level response. At the same time, different power adjustment modes can be conveniently realized by outputting power adjustment control signals through the controller, which can flexibly adapt to different types of loads.

[0014] Furthermore, the current parameter acquisition module includes:

[0015] A current transformer is installed on the live wire of a power distribution line to collect and output the current signal of the power distribution line.

[0016] A metering module, electrically connected to the current transformer, is used to receive and generate the current metering data based on the current signal;

[0017] The zero-crossing detection module is electrically connected to the current transformer and is used to detect the voltage parameter data generated by the output terminal of the current transformer through the load resistor.

[0018] The output terminals of both the metering module and the zero-crossing detection module are connected to the signal input terminal of the main control module.

[0019] The above technical solution can collect current and voltage parameter data on the live wires of power distribution lines in real time, which helps to improve the control accuracy of the main control module and ensure the constant output power of the power distribution network.

[0020] Furthermore, the solid-state switch includes multiple sets of NMOS transistors connected in reverse series;

[0021] The gates of the two NMOS transistors in each group are respectively coupled to the Gate1 and Gate2 signals output by the driving module, the sources of the two NMOS transistors are both coupled to the Source signal output by the driving module, and the drains of the two NMOS transistors are connected in parallel with the load.

[0022] Through the above technical solutions, the solid-state switch can meet the high-power switching control requirements of power distribution lines, and can quickly respond to the drive control signal to adjust the switching state of the solid-state switch. It can also effectively block the discharge effect of the body diode in the MOSFET, achieving a precise and stable switching effect.

[0023] Furthermore, the main control module includes:

[0024] The data receiving submodule is configured to receive the current metering data, voltage parameter data, and load type, as well as the mode selection command input from the external input via the self-interaction module.

[0025] The mode selection submodule has a built-in mode selection algorithm, which is used to select different power adjustment modes and output corresponding power adjustment control signals based on the mode selection command input by the external input, or based on the current metering data, voltage parameter data and load type.

[0026] The display data output submodule is connected to the interaction module and is used to convert output electrical parameter information and power adjustment mode information.

[0027] The control command output submodule is data-connected to the drive module and is used to output the power adjustment control signal to the drive module;

[0028] The data storage submodule is configured in the main control module or configured as an external storage unit connected to the mode selection submodule for storing the current metering data, voltage parameter data, load type, and power adjustment control program modules corresponding to different power adjustment modes.

[0029] The power adjustment control program includes a voltage adjustment power adjustment program module, a fixed-cycle power adjustment submodule, and a single-cycle power adjustment submodule.

[0030] Through the above technical solution, the main control module can autonomously select an appropriate power adjustment mode to adjust the power based on the current parameter signal in the power distribution line, thereby maintaining stable output power. It can also select the corresponding power adjustment mode based on the mode selection command input by the user, so as to meet the constant power output requirements of different application scenarios.

[0031] Furthermore, the main control module is also configured with or connected to:

[0032] The historical data storage submodule is connected to the data receiving submodule and is used to store historical current parameters;

[0033] The load type prediction submodule has a built-in type prediction algorithm and is connected to the historical data storage module. It estimates and outputs the load type within a set time period based on the historical current parameters.

[0034] The adaptation relationship storage submodule is configured to store the power adjustment modes adapted during the switching of different types of loads on the power distribution line.

[0035] The transition mode output submodule is configured to connect with the load type prediction submodule and the adaptation relationship storage submodule. It searches for the corresponding power adjustment mode based on the current load type and the load type, and outputs the power adjustment control signal.

[0036] Through the above technical solution, in the scenario of multiple loads connected to the power distribution line, the change pattern of load type on the power distribution line can be predicted by using historical current parameter data, and the load type in the future set period can be predicted. Then, the power adjustment mode can be changed in advance according to the power adjustment mode adapted to the conversion process of different types of loads. In this way, when the load type changes, the power output can be adjusted in a timely and stable manner to maintain a constant power output.

[0037] Furthermore, the main control module is also configured with:

[0038] The alarm module is configured to be data connected to the load identification module, the drive module and the display data output submodule. It receives the load type output by the load identification module. If the load is detected and identified as a malicious load, it outputs a cut-off signal to the drive module to control the switch module to disconnect, and at the same time outputs an alarm message to the display data output submodule.

[0039] The above technical solution can quickly cut off the circuit when a malicious load is detected, thus providing protection.

[0040] Furthermore, the main control module is configured as a microcontroller, and the historical data storage submodule is configured as an external storage chip that is connected to the main control module.

[0041] A method for constant output power regulation in a distribution network based on solid-state switches, comprising:

[0042] Associate storage for various load types and their corresponding power adjustment modes;

[0043] Detect and acquire current parameters of power distribution lines, and analyze and generate load types;

[0044] Get the current power adjustment mode:

[0045] If the current power adjustment mode is compatible with the current load type, then the current power adjustment mode will be maintained.

[0046] If the current power adjustment mode is not compatible with the current load type, then:

[0047] The system detects and obtains the power control mode of the current power distribution line. If it is an automatic control mode, it searches for and confirms the corresponding power adjustment mode based on the current load type and outputs a power adjustment control signal.

[0048] If it is in manual control mode, the external command input status is detected:

[0049] If an external command is detected within a set time, the corresponding power adjustment mode will be confirmed in response to the input external mode selection command signal, and a power adjustment control signal will be output.

[0050] If no external command is detected within the set time, the system will switch to automatic control mode.

[0051] The power adjustment modes include: voltage adjustment, fixed-cycle adjustment, or single-cycle adjustment.

[0052] The above technical solution allows for timely adjustment of the power control mode based on changes in the load type in the power distribution line, thereby maintaining a constant power output in the power distribution network.

[0053] Furthermore, the method also includes:

[0054] Acquire and store historical current parameter data, and analyze and generate a predictive model to characterize the changing patterns of load types;

[0055] Obtain the power adjustment mode adapted to the switching process of different types of loads on the power distribution line and store it as an adaptation relationship library;

[0056] Based on the current current parameters of the power distribution line, the load type in the future set time period is estimated based on the prediction model, and the corresponding power adjustment mode in the future set time period is generated.

[0057] Obtain the current power adjustment mode and the power adjustment mode within a future set time period, and use the adaptation relationship database to find and confirm the power adjustment mode adapted during the switching process.

[0058] With the above technical solution, when the load in the power distribution current limiting is switched, the power regulation mode can be changed in advance to make the power output more stable.

[0059] Furthermore, the adaptation relationship library includes:

[0060] When it is detected that the load type is about to switch from inductive or capacitive load to resistive load, the current power regulation mode is maintained and the power regulation mode is switched to voltage regulation mode after a set period of time in the future.

[0061] When it is detected that the load type is about to switch from resistive load to capacitive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to voltage regulation power regulation or fixed-cycle power regulation mode; otherwise, the current power regulation mode will be maintained and switched to voltage regulation power regulation mode after a set period of time in the future.

[0062] When it is detected that the load type is about to switch from resistive load to inductive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to fixed-cycle power regulation or voltage regulation power regulation mode; otherwise, the current power regulation mode will be maintained and switched to fixed-cycle power regulation mode after a set period of time in the future.

[0063] With the above technical solution, when the type of load connected to the power distribution line changes, the power adjustment mode can be optimized in advance, making the power output of the circuit more stable.

[0064] In summary, this application includes at least one of the following beneficial technical effects:

[0065] (1) By using a solid-state switching circuit composed of MOSFETs, the circuit can be quickly disconnected at a speed of microseconds when a fault occurs, thus avoiding electrical fire accidents.

[0066] (2) By automatically identifying and determining the load type, the solution of this application can be applied to a variety of different scenarios, especially in densely populated places such as commercial buildings, industrial parks, and school dormitories, where there are a variety of electrical appliances. Attached Figure Description

[0067] Figure 1 This is a functional module diagram of the power distribution network constant output power adjustment circuit of this application;

[0068] Figure 2 This is a schematic diagram of the circuit principle of the switching module;

[0069] Figure 3 This is a schematic diagram of the functional modules of the main control module of this application;

[0070] Figure 4 This is the circuit schematic of the driver module;

[0071] Figure 5 This is a schematic diagram of a constant output power adjustment method for power distribution networks based on solid-state switches;

[0072] Figure 6 This is a schematic diagram illustrating the optimization of the constant output power adjustment method for power distribution networks.

[0073] Reference numerals: 100, Current parameter acquisition module; 101, Current transformer; 102, Metering module; 103, Zero-crossing detection module; 200, Load identification module; 300, Interaction module; 301, Display; 302, Buttons; 303, Communication module; 400, Main control module; 401, Data receiving submodule; 402, Mode selection submodule; 403, Display data output submodule; 404, Control command output submodule; 405, Data storage submodule; 406, Historical data storage submodule; 407, Load type prediction submodule; 408, Adaptation relationship storage submodule; 409, Transition mode output submodule; 410, Alarm module; 500, Drive module; 600, Switch module. Detailed Implementation

[0074] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0075] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] This application discloses a constant output power adjustment circuit for a power distribution network based on a solid-state switch, such as... Figure 1 As shown, it mainly includes: a current parameter acquisition module 100, a load identification module 200, an interaction module 300, a main control module 400, a drive module 500, and a switch module 600.

[0077] The current parameter acquisition module 100 is coupled to the power distribution line and is used to acquire and output current metering data and voltage parameter data in the power distribution line. Specifically, the current parameter acquisition module 100 includes a current transformer 101, a metering module 102, and a zero-crossing detection module 103. The current transformer 101 is installed on the live wire of the power distribution line and is used to collect and output the current signal of the power distribution line. The metering module 102 is electrically connected to the current transformer 101 and is used to receive and generate the current metering data based on the current signal and input it to the main control module 400. The zero-crossing detection module 103 is electrically connected to the current transformer 101 and is used to detect the voltage parameter data generated by the output of the current transformer 101 through the load resistor, and then input it to the main control module 400. It is mainly used to detect the zero-crossing point of the AC sine wave, facilitating subsequent precise control of the load power.

[0078] The load identification module 200 is electrically connected to the current transformer 101 in the current parameter acquisition module 100. Based on current measurement data and voltage parameter data, such as voltage data, current data, and power data, and combined with a specific algorithm model, it identifies and outputs the circuit load type, which is then input to the main control module 400. In a specific implementation, the load identification module 200 determines the load type by analyzing the phase relationship between current and voltage. For example, if the current and voltage are in phase, it is a resistive load; if the current lags behind the voltage, it is an inductive load; if the current leads the voltage, it is determined to be a capacitive load.

[0079] The interaction module 300 is electrically connected to the main control module 400 and external interaction components. It is used to receive and display electrical parameter information output by the main control module 400, and to receive external mode selection commands and input them to the main control module 400. Specifically, the interaction module 300 includes a display 301 and buttons 302. Data interaction and transmission are realized through a communication module 303, such as a Bluetooth or RS485 communication module. In practice, the buttons 302 and the display 301 can be integrated into a touch screen.

[0080] The main control module 400 is electrically connected to the current parameter acquisition module 100, the load identification module 200, and the interaction module 300. It acquires and, based on the current metering data, voltage parameter data, and load type of the power distribution line, automatically or based on the mode selection command input by the interaction module 300, outputs a PWM power regulation control signal to control the on / off state of the switch module 600. The aforementioned power regulation control signal includes a voltage regulation power regulation signal, a fixed-cycle power regulation signal, or a single-cycle power regulation signal.

[0081] The drive module 500 is electrically connected to the main control module 400 and the switch module 600. It receives and responds to the power adjustment control signal output by the main control module 400, and outputs drive control signal to control the on / off state of the switch module 600.

[0082] The switch module 600 is disposed between the power distribution line and the load and is controlled and connected to the drive module 500. It receives and responds to the drive control signal to control the energization state of the load. In this embodiment, the switch module 600 is configured as a solid-state switch and disposed on the live wire of the power distribution line. It includes at least one set of two MOSFETs connected in reverse series on the power distribution line, with the gates of the two MOSFETs respectively coupled to the drive control signal output by the drive module 500.

[0083] like Figure 2 As shown in the embodiment of this application, the solid-state switch includes four groups of NMOS transistors connected in reverse series. The gates of the two NMOS transistors in each group are respectively coupled to the Gate1 and Gate2 signals output by the driver module 500, the sources of both NMOS transistors are coupled to the Source signal output by the driver module 500, and the drains of both NMOS transistors are connected in parallel with the load. This scheme enables the entire solid-state switch to meet the high-power switching requirements of the power distribution line, and can quickly respond to the drive control signal to adjust the on / off state of the solid-state switch. It also effectively blocks the discharge effect of the body diode in the MOS transistor, achieving a precise, fast, and stable switching effect.

[0084] Combination Figure 3 As shown in the embodiment of this application, the main control module 400 includes: a data receiving submodule 401, a mode selection submodule 402, a display data output submodule 403, a control command output submodule 404, and a data storage submodule 405.

[0085] The data receiving submodule 401 is configured to receive current metering data, voltage parameter data, and load type, as well as mode selection commands input from external sources via the self-interaction module 300. In practical applications, the data receiving submodule 401 includes multiple different data input interfaces.

[0086] The mode selection submodule 402 has a built-in mode selection algorithm, used to select different power regulation modes and output corresponding power regulation control signals based on externally input mode selection commands, or based on the current metering data, voltage parameter data, and load type. Correspondingly, the power regulation control program includes a voltage regulation power regulation program module, a fixed-cycle power regulation submodule, and a single-cycle power regulation submodule. The display data output submodule 403 is data-connected to the interaction module 300, used to convert and output electrical parameter information and power regulation mode information, facilitating users to view the power supply parameters of the current power distribution line. The control command output submodule 404 is data-connected to the drive module 500, used to output the power regulation control signals to the drive module 500, such as... Figure 4 The circuit schematic of the driver module 500 is shown.

[0087] The data storage submodule 405 is configured within the main control module 400, or configured as an external storage unit, such as an external storage chip, connected to the mode selection submodule 402, for storing current metering data, voltage parameter data, load type, and power adjustment control program modules corresponding to different power adjustment modes. Preferably, in this embodiment, the power adjustment control program modules corresponding to each of the above power adjustment modes are all configured in the main control chip. In this embodiment, the main control chip is preferably a microcontroller.

[0088] In practical applications, different types of loads can correspond to multiple power regulation modes. For example, when a resistive load, such as an electric heater or incandescent lamp, is connected to the line, all three power regulation modes are applicable, depending on the response speed, harmonic tolerance, and system inertia. If the current power regulation mode for the resistive load is voltage regulation, and the load type is likely to switch to capacitive load within a set period in the future, the current power regulation mode can be changed to periodic regulation. This will not affect the power control of the current resistive load and will also be suitable for the possible capacitive load.

[0089] To achieve the above effects, preferably, combined with Figure 3 As shown in the embodiments of this application, the main control module 400 is also configured with or connected to a historical data storage submodule 406, a load type prediction submodule 407, an adaptation relationship storage submodule 408, and a transition mode output submodule 409.

[0090] The historical data storage submodule 406 is data-connected to the data receiving submodule 401 and is used to store historical current parameters. Due to the large amount of data, the historical data storage submodule 406 is preferably implemented using an external storage chip. The load type prediction submodule 407 has a built-in type prediction algorithm and is data-connected to the historical data storage module. It estimates and outputs the load type within a set time period based on the historical current parameters. In practical applications, the load type prediction submodule 407 is configured as a program module loaded into the main control chip. It analyzes the changing trends of historical current parameters to obtain the time patterns of various loads accessing the power distribution line. For example, the square turns on the lighting at a set time, and the air conditioning auxiliary heating device starts working during a set time period. The access of the above different types of loads will affect the overall parameters of the power distribution line current.

[0091] The adaptation relationship storage submodule 408 is configured to store the power adjustment modes adapted during the switching of different types of loads on the power distribution line. The transition mode output submodule 409 is configured to be data-connected to the load type prediction submodule 407 and the adaptation relationship storage submodule 408, and to find the corresponding power adjustment mode according to the current load type and output the power adjustment control signal.

[0092] In scenarios where multiple loads are connected to the distribution line, the above scheme can predict the changing patterns of load types on the distribution line and anticipate the load types within a set time period by using historical current parameter data. Then, the power adjustment mode can be changed in advance according to the power adjustment mode adapted to the conversion process of different types of loads. In this way, the power output can be adjusted in a timely and stable manner when the load type changes, and the constant power output can be maintained.

[0093] Furthermore, the main control module 400 is also equipped with an alarm module 410, which is configured to be data connected to the load identification module 200, the drive module 500, and the display data output submodule 403. It receives the load type output by the load identification module 200. If the load is detected and identified as a malicious load, such as a purely resistive direct-heating appliance, it outputs a cut-off signal to the drive module 500 to control the switch module 600 to disconnect, and at the same time outputs an alarm message to the display data output submodule 403. The above technical solution can protect the circuit itself.

[0094] Based on the aforementioned power adjustment circuit, this application also discloses a method for adjusting the constant output power of a power distribution network based on a solid-state switch, such as... Figure 5 As shown, the main steps include:

[0095] S100, associated with various load types of storage and their corresponding power adjustment modes;

[0096] S200 detects and acquires the current parameters of the power distribution line, and analyzes and generates the load type;

[0097] S300, retrieve the current power adjustment mode:

[0098] S310, If the current power adjustment mode is compatible with the current load type, then maintain the current power adjustment mode;

[0099] S320: If the current power control mode is not compatible with the current load type, then detect and obtain the power control mode of the current power distribution line.

[0100] S321, if it is in automatic control mode, then find and confirm the corresponding power adjustment mode based on the current load type, and output the power adjustment control signal;

[0101] S322, if in manual control mode, detects the external command input status:

[0102] S3221: If an external command is detected within a set time, the corresponding power adjustment mode is confirmed in response to the input external mode selection command signal, and a power adjustment control signal is output.

[0103] S3222: If no external command is detected within the set time, it will switch to automatic control mode.

[0104] The power adjustment modes in the above steps include: voltage regulation, constant-cycle regulation, or single-cycle regulation. When the line is connected to a resistive load, such as an electric heater or incandescent lamp, all three power adjustment modes are applicable, depending on the response speed, harmonic tolerance, and system inertia. When the line is connected to a capacitive load, such as a capacitor or capacitive filter circuit, voltage regulation and constant-cycle regulation are applicable, but single-cycle regulation is not. When the line is connected to an inductive load, such as a motor or transformer, constant-cycle regulation and voltage regulation are applicable, but single-cycle regulation is not.

[0105] Based on the above technical solution, the power control mode can be adjusted in a timely manner according to the changes in the load type in the power distribution line, thereby enabling the power distribution network to maintain a constant power output.

[0106] When the load type in the power distribution line changes, such as Figure 6 As shown, the method further includes:

[0107] A100 acquires and stores historical current parameter data, analyzes and generates a predictive model to characterize the changing patterns of load types. In practice, these changing patterns are manifested as the changing patterns of current and voltage phases over time.

[0108] A200 retrieves the power adjustment modes adapted to the switching process of different types of loads on the power distribution line and stores them as an adaptation relationship library. This adaptation relationship library is used to pre-set the power adjustment mode at a predetermined time when a load type is expected to switch, thus achieving a stable transition.

[0109] A300 acquires and, based on the current current parameters of the power distribution line, predicts the load type within a future set time period using a prediction model, and generates the corresponding power adjustment mode for that future set time period.

[0110] A400: Obtain the current power adjustment mode and the power adjustment mode within a future set time period, and use the adaptation relationship database to find and confirm the power adjustment mode adapted during the switching process.

[0111] In detail, the adaptation relationship library includes:

[0112] When it is detected that the load type is about to switch from inductive or capacitive load to resistive load, the current power regulation mode is maintained and the power regulation mode is switched to voltage regulation mode after a set period of time in the future.

[0113] When it is detected that the load type is about to switch from resistive load to capacitive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to voltage regulation power regulation or fixed-cycle power regulation mode; otherwise, the current power regulation mode will be maintained and switched to voltage regulation power regulation mode after a set period of time in the future.

[0114] When it is detected that the load type is about to switch from resistive load to inductive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to fixed-cycle power regulation or voltage regulation power regulation mode; otherwise, the current power regulation mode will be maintained and switched to fixed-cycle power regulation mode after a set period of time in the future.

[0115] In conventional practice, the operation process of the constant output power adjustment method for power distribution networks based on solid-state switches described in this application can be summarized as follows:

[0116] First, the output power is set using button 302 on the interactive module 300. After the load is connected to the line, the current transformer 101 first collects the current. At this time, the metering module 102, the zero-crossing detection module 103, and the load identification module 200 receive the current data and then output it to the main control module 400. At this time, manual mode or automatic mode can be selected to ensure constant power output. If manual mode is selected, one of three methods—voltage regulation power regulation, fixed-cycle power regulation, and single-cycle power regulation—can be set manually using button 302. If automatic mode is selected, the main control module 400 will automatically set the three power regulation modes according to the load type identified by the load identification module 200.

[0117] If the type of load connected to the power distribution line changes over time, for example, an air conditioner typically only has its motor driving the fan or compressor, which can be considered an inductive load. However, when the air conditioner is in electric heating auxiliary mode and only the heating element is used for preheating, it becomes a resistive load. In this case, the power adjustment mode can be switched in advance to a voltage and power adjustment mode that is suitable for both inductive and resistive loads.

[0118] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A constant output power regulation circuit for a power distribution network based on a solid-state switch, characterized in that, include: The current parameter acquisition module (100) is coupled to the power distribution line and is used to acquire and output the current metering data and voltage parameter data in the power distribution line. The load identification module (200) is electrically connected to the current parameter acquisition module (100). Based on the current measurement data and voltage parameter data, and combined with a specific algorithm model, it identifies and outputs the circuit load type. The interaction module (300) is electrically connected to the main control module (400) and external interaction components, and is used to receive and display electrical parameter information, and to receive external mode selection instructions and input them to the main control module (400); The main control module (400) is electrically connected to the current parameter acquisition module (100), the load identification module (200) and the interaction module (300), and is used to acquire and automatically or based on the mode selection instruction of the current metering data, voltage parameter data and load type of the power distribution line, and output the power adjustment control signal to control the on / off state of the switch module (600). The drive module (500) is electrically connected to the main control module (400) and the switch module (600), and receives and responds to the power adjustment control signal to output a drive control signal to control the on / off state of the switch module (600); A switch module (600) is disposed between the power distribution line and the load and is controlled and connected to the drive module (500), and receives and responds to the drive control signal to control the power-on state of the load; The power control signal includes a voltage regulation power control signal, a fixed-period power control signal, or a single-cycle power control signal. The switching module (600) includes at least one set of solid-state switches configured on the power distribution line and composed of two MOS transistors connected in reverse series. The gates of the two MOS transistors are respectively coupled to the drive control signal output by the drive module (500). The main control module (400) is configured to implement the following methods: Acquire and store historical current parameter data, and analyze and generate a predictive model to characterize the changing patterns of load types; Obtain the power adjustment mode adapted to the switching process of different types of loads on the power distribution line and store it as an adaptation relationship library; Based on the current current parameters of the power distribution line, the load type in the future set time period is estimated based on the prediction model, and the corresponding power adjustment mode in the future set time period is generated. Obtain the current power adjustment mode and the power adjustment mode within a future set time period, and combine the adaptation relationship database to find and confirm the power adjustment mode adapted during the switching process. The adaptation relationship library includes: When it is detected that the load type is about to switch from inductive or capacitive load to resistive load, the current power regulation mode is maintained and the power regulation mode is switched to voltage regulation mode after a set period of time in the future; When it is detected that the load type is about to switch from resistive load to capacitive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to voltage regulation power regulation or fixed-cycle power regulation mode; otherwise, the current power regulation mode will be maintained and switched to voltage regulation power regulation mode after a set period of time in the future. When it is detected that the load type is about to switch from resistive load to inductive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode will be switched to fixed-cycle power regulation or voltage regulation power regulation mode; otherwise, the current power regulation mode will be maintained and switched to fixed-cycle power regulation mode after a set period of time in the future.

2. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 1, characterized in that, The current parameter acquisition module (100) includes: A current transformer (101) is installed on the live wire of the power distribution line to collect and output the current signal of the power distribution line. The metering module (102) is electrically connected to the current transformer (101) and is used to receive and generate the current metering data based on the current signal; The zero-crossing detection module (103) is electrically connected to the current transformer (101) and is used to detect the voltage parameter data generated by the output terminal of the current transformer (101) through the load resistor. The output terminals of the metering module (102) and the zero-crossing detection module (103) are both connected to the signal input terminal of the main control module (400).

3. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 1, characterized in that, The solid-state switch includes multiple sets of NMOS transistors connected in reverse series; The gates of the two NMOS transistors in each group are respectively coupled to the Gate1 signal and the Gate2 signal output by the driving module (500), the sources of the two NMOS transistors are both coupled to the Source signal output by the driving module (500), and the drains of the two NMOS transistors are connected in parallel with the load.

4. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 2, characterized in that, The main control module (400) includes: The data receiving submodule (401) is configured to receive the current metering data, voltage parameter data and load type, and the self-interaction module (300) receives the mode selection command input from the outside. The mode selection submodule (402) has a built-in mode selection algorithm, which is used to select different power adjustment modes and output corresponding power adjustment control signals based on the mode selection command input by the external input, or based on the current metering data, voltage parameter data and load type. The display data output submodule (403) is connected to the interaction module (300) for converting output electrical parameter information and power adjustment mode information; The control command output submodule (404) is data connected to the drive module (500) and is used to output the power adjustment control signal to the drive module (500); The data storage submodule (405) is configured in the main control module (400) or configured as an external storage unit connected to the mode selection submodule (402) for storing the current metering data, voltage parameter data, load type and power adjustment control program module corresponding to different power adjustment modes. The power adjustment control program includes a voltage adjustment power adjustment program module, a fixed-cycle power adjustment submodule, and a single-cycle power adjustment submodule.

5. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 4, characterized in that, The main control module (400) is also configured with or connected to: The historical data storage submodule (406) is connected to the data receiving submodule (401) and is used to store historical current parameters; The load type prediction submodule (407) has a built-in type prediction algorithm, is connected to the historical data storage module, and predicts and outputs the load type within a set period based on the historical current parameters. The adaptation relationship storage submodule (408) is configured to store the power adjustment mode adapted during the switching process of different types of loads on the power distribution line; The transition mode output submodule (409) is configured to be data connected to the load type prediction submodule (407) and the adaptation relationship storage submodule (408), and to find the corresponding power adjustment mode according to the current load type and the load type, and output the power adjustment control signal.

6. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 4, characterized in that, The main control module (400) is also configured with: The alarm module (410) is configured to be connected to the load identification module (200), the drive module (500) and the display data output submodule (403) for data connection. It receives the load type output by the load identification module (200). If the load is detected and identified as a malicious load, it outputs a cut-off signal to the drive module (500) to control the switch module (600) to disconnect, and at the same time outputs alarm information to the display data output submodule (403).

7. The constant output power adjustment circuit for power distribution networks based on solid-state switches according to claim 5, characterized in that, The main control module (400) is configured as a microcontroller, and the historical data storage submodule (406) is configured as an external storage chip that is connected to the main control module (400) for data transmission.

8. A method for adjusting the constant output power of a power distribution network based on solid-state switches, characterized in that, The power distribution network constant output power regulation circuit based on solid-state switches as described in any one of claims 1-7 includes: Associate storage for various load types and their corresponding power adjustment modes; Detect and acquire current parameters of power distribution lines, and analyze and generate load types; Get the current power adjustment mode: If the current power adjustment mode is compatible with the current load type, then the current power adjustment mode will be maintained. If the current power adjustment mode is not compatible with the current load type, then: The system detects and obtains the power control mode of the current power distribution line. If it is an automatic control mode, it searches for and confirms the corresponding power adjustment mode based on the current load type and outputs a power adjustment control signal. If it is in manual control mode, the external command input status is detected: If an external command is detected within a set time, the corresponding power adjustment mode will be confirmed in response to the input external mode selection command signal, and a power adjustment control signal will be output. If no external command is detected within the set time, the system will switch to automatic control mode. The power adjustment modes include: voltage adjustment, fixed-cycle adjustment, or single-cycle adjustment.

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