Circuit and method for adjusting constant output power of power distribution network based on solid-state switch

Abstract

The invention relates to the technical field of circuit devices of alternating-current power distribution networks, and discloses a power distribution network constant output power adjusting circuit and method based on a solid-state switch, and the circuit comprises a current parameter obtaining module which is used for obtaining current metering data and voltage parameter data in an output power distribution line; the load identification module is used for identifying the load type of the output circuit; the interaction module is used for displaying the electrical parameter information; the main control module is used for outputting a power regulation control signal according to the current metering data, the voltage parameter data and the load type of the distribution line; the driving module receives and responds to the power regulation control signal to output a driving control signal to control the on-off of the switch module; the switch module receives and responds to the driving control signal to control the power-on state of the load; wherein the switch module comprises at least one group of solid-state switches formed by reversely connecting two MOS (Metal Oxide Semiconductor) tubes in series. According to the scheme, the power distribution network can keep constant power output according to the load type, and energy loss caused when a line is turned on or off is avoided.

Description

Technical Field

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

[0002] In a distribution network, maintaining a constant output power is a key requirement for ensuring the stability of the power system and improving energy utilization efficiency. With the rapid development of industrial automation, smart grids, and new energy grid-connected technologies, problems such as frequent load fluctuations, an increase in non-linear loads, and overheating of wires and internal short circuits in electrical appliances caused by malicious loads, leading to fires, have become increasingly prominent. Traditional power adjustment technologies have difficulty meeting the requirements of high precision, high response speed, and low harmonic interference. Summary of the Invention

[0003] Aiming at the problems existing in power adjustment technologies in practical applications, the first objective of this application is to provide a constant output power adjustment circuit for a distribution network based on solid-state switches, which can keep the distribution network outputting a constant power according to the load type, avoid energy losses caused by line opening and closing, and use solid-state switches mainly composed of MOS transistors for control, enabling microsecond-level response protection for loads and lines. Based on the above power adjustment circuit, the second objective of this application is to propose a constant output power adjustment method for a distribution network based on solid-state switches. The specific scheme is as follows:

[0004] A constant output power adjustment circuit for a distribution network based on solid-state switches includes:

[0005] A current parameter acquisition module, coupled to the distribution line, for acquiring and outputting current measurement data and voltage parameter data in the distribution line;

[0006] A load identification module, electrically connected to the current parameter acquisition module, based on the current measurement data and voltage parameter data, combined with a specific algorithm model, to identify and output the circuit load type;

[0007] An interaction module, electrically connected to the main control module and external interaction components, for receiving and displaying electrical parameter information, and receiving an external mode selection instruction and inputting it to the main control module;

[0008] A main control module, electrically connected to the current parameter acquisition module, the load identification module, and the interaction module, for acquiring and based on the current measurement data, voltage parameter data, and load type of the distribution line, automatically or based on the mode selection instruction, outputting a power adjustment control signal to control the on-off state of the switch module;

[0009] A driving module, electrically connected to the main control module and the switching module, receives and responds to the power regulation control signal to output a driving control signal to control the on / off state of the switching module;

[0010] A switching module, arranged between the power distribution line and the load and controlledly connected to the driving module, receives and responds to the driving control signal to control the power-on state of the load;

[0011] Wherein, the power regulation control signal includes a voltage regulation and power regulation signal, a fixed-period power regulation signal or a single-cycle power regulation signal;

[0012] The switching module includes at least one group of solid-state switches configured on the power distribution line and composed of two MOS transistors connected in reverse series, and the gates of the two MOS transistors are respectively coupled to the driving control signal output by the driving module.

[0013] Through the above technical solution, it is possible to keep the power output of the power distribution network constant after the load is connected to the circuit, avoid energy losses caused by line opening and closing, and use solid-state switches mainly composed of MOS transistors for on / off control, which can provide microsecond-level response protection for the load and the line. At the same time, different power regulation modes can be conveniently realized by the controller outputting the power regulation control signal, and it can be flexibly adapted to different types of loads.

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

[0015] A current transformer, arranged on the live wire of the power distribution line, for collecting and outputting the current signal of the power distribution line;

[0016] A metering module, electrically connected to the current transformer, for receiving and generating the current metering data based on the current signal;

[0017] A zero-crossing detection module, electrically connected to the current transformer, for detecting the voltage parameter data generated by converting the output of the current transformer through a load resistor;

[0018] Wherein, the output ends of the metering module and the zero-crossing detection module are both signal-connected to the signal input end of the main control module.

[0019] Through the above technical solution, the current and voltage parameter data on the live wire of the power distribution line can be collected in real time, which helps to improve the control accuracy of the main control module and ensure the constancy of the power output of the power distribution network.

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

[0021] The gates of the two NMOS transistors included in each group are respectively coupled to the Gate1 signal and the Gate2 signal 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 arranged in parallel with the load.

[0022] Through the above technical solution, the entire solid-state switch can meet the on-off control requirements of high-power distribution lines, can quickly respond to the drive control signal to adjust the on-off state of the solid-state switch, and can effectively block the discharge effect of the body diode in the MOS transistor, achieving an accurate and stable switching effect.

[0023] Further, the main control module includes:

[0024] A data receiving sub-module, configured to receive the current measurement data, voltage parameter data, and load type, and receive the mode selection instruction input externally from the interaction module;

[0025] A mode selection sub-module, with a built-in mode selection algorithm, used to select different power adjustment modes according to the externally input mode selection instruction, or according to the current measurement data, voltage parameter data, and load type, and output the corresponding power adjustment control signal based on the mode selection algorithm;

[0026] A display data output sub-module, data-connected to the interaction module, used to convert and output the electrical parameter information and power adjustment mode information;

[0027] A control instruction output sub-module, data-connected to the driving module, used to output the power adjustment control signal to the driving module;

[0028] A data storage sub-module, configured in the main control module or as an external storage unit data-connected to the mode selection sub-module, used to store the current measurement data, voltage parameter data, load type, and the power adjustment control program modules corresponding to different power adjustment modes;

[0029] Among them, the power adjustment control program includes a voltage regulation and power adjustment program module, a fixed-period power adjustment sub-module, and a single-cycle power adjustment sub-module.

[0030] Through the above technical solution, the main control module can autonomously select an appropriate power adjustment mode according to the current parameter signal in the distribution line to adjust the power and maintain the stability of the output power, or can also select the corresponding power adjustment mode according to the mode selection instruction input by the user to meet the constant power output requirements of different application scenarios.

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

[0032] Historical data storage sub-module, which is data-connected to the data receiving sub-module and is used to store historical current parameters;

[0033] Load type prediction sub-module, which has a built-in type prediction algorithm, is data-connected to the historical data storage module, estimates the load type within a set period based on the historical current parameters and outputs it;

[0034] Adaptation relationship storage sub-module, which is configured to store the power regulation modes adapted during the switching process of different types of loads on the distribution line;

[0035] Transition mode output sub-module, which is configured to be data-connected to the load type prediction sub-module and the adaptation relationship storage sub-module, searches for the corresponding power regulation mode according to the current load type and the load type, and outputs a power regulation control signal.

[0036] Through the above technical solutions, in the scenario where multiple loads are connected to the distribution line, the change law of the load type on the distribution line can be estimated through the historical current parameter data, and the load type within a future set period can be predicted at the same time. Then, according to the power regulation mode adapted during the conversion process of different types of loads, the power regulation mode is changed in advance, so that when the load type changes, the power output can be adjusted timely and smoothly, and the constant output of power can be maintained.

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

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

[0039] Through the above technical solutions, when a malicious load is identified, the circuit can be quickly cut off, playing a protective role.

[0040] Furthermore, the main control module is configured as a single-chip microcomputer, and the historical data storage sub-module is configured as an external storage chip data-connected to the main control module.

[0041] A method for adjusting the constant output power of a distribution network based on a solid-state switch, including:

[0042] Associatively store each load type and its adapted power regulation mode;

[0043] Detect and obtain the current parameters of the distribution line, and analyze and generate the load type;

[0044] Obtain the current power regulation mode:

[0045] If the current power regulation mode is adapted to the current load type, then maintain the current power regulation mode;

[0046] If the current power regulation mode does not match the current load type, then:

[0047] Detect and obtain the power control mode of the current power distribution line. If it is the automatic control mode, then find and confirm the corresponding power regulation mode based on the current load type, and output a power regulation control signal;

[0048] If it is the manual control mode, then detect the external instruction input status:

[0049] If an external instruction is detected within the set time, then in response to the input external mode selection instruction signal, confirm the corresponding power regulation mode, and output a power regulation control signal;

[0050] If no external instruction is detected within the set time, then switch to the automatic control mode;

[0051] Among them, the power regulation mode includes: voltage regulation and power regulation, fixed-period power regulation or single-cycle power regulation.

[0052] Through the above technical solution, the power control mode can be adjusted in time according to the change of the load type in the power distribution line, thereby keeping the power output of the power distribution network constant.

[0053] Further, the method further includes:

[0054] Obtain and store historical current parameter data, and analyze and generate a prediction model for characterizing the change law of the load type;

[0055] Obtain the power regulation 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] Obtain and according to the current current parameters of the power distribution line, estimate the load type within the future set time period based on the prediction model, and correspondingly generate the power regulation mode within the future set time period;

[0057] Obtain the current power regulation mode and the power regulation mode within the future set time period, and combine the adaptation relationship library to find and confirm the power regulation mode adapted to the switching process.

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

[0059] Further, the adaptation relationship library includes:

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

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

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

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

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

[0065] (1) By using a solid-state switch circuit composed of MOS transistors, it is possible to quickly cut off the line at the microsecond level when a line fault occurs, avoiding the occurrence of electrical fire accidents;

[0066] (2) By automatically identifying and determining the load type, the solution of the present application can be applied to a variety of different scenarios, especially in places with dense population and complex types of electrical appliances, such as commercial buildings, industrial parks, and school dormitories. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is a schematic diagram of the functional modules of the constant output power adjustment circuit of the distribution network of the present application;

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

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

[0070] Figure 4 is the circuit schematic diagram of the drive module;

[0071] Figure 5 is a schematic diagram of the method for adjusting the constant output power of the distribution network based on a solid-state switch;

[0072] Figure 6 is a schematic diagram of the optimization of the method for adjusting the constant output power of the distribution network.

[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, button; 303, communication module; 400, main control module; 401, data receiving sub-module; 402, mode selection sub-module; 403, display data output sub-module; 404, control instruction output sub-module; 405, data storage sub-module; 406, historical data storage sub-module; 407, load type prediction sub-module; 408, adaptation relationship storage sub-module; 409, transition mode output sub-module; 410, alarm module; 500, drive module; 600, switch module. Detailed implementation manners

[0074] The following details the implementation manners of the present application. Examples of the implementation manners are shown in the drawings.

[0075] In the description of this specification, the description with reference to the terms "certain implementation manners", "one implementation manner", "some implementation manners", "illustrative implementation manners", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0076] An embodiment of the present application discloses a constant output power adjustment circuit for a distribution network based on a solid-state switch, as Figure 1 shown, mainly including: 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 the current measurement data and voltage parameter data in the power distribution line. Specifically, the current parameter acquisition module 100 specifically includes: a current transformer 101, a metering module 102, and a zero-crossing detection module 103. The current transformer 101 is arranged 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 measurement 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 converting the output end of the current transformer 101 through a load resistor and then input it to the main control module 400, mainly for detecting the zero-crossing point of the AC sine wave to facilitate 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 the current measurement data and voltage parameter data, such as voltage data, current data, power data, etc., combined with a specific algorithm model, it identifies and outputs the circuit load type, and then inputs it to the main control module 400. In the specific implementation, the load identification module 200 determines the load type by analyzing the phase relationship between the current and the voltage. For example, if the current and the voltage are in the same 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, and is used to receive and display the electrical parameter information output by the main control module 400, as well as receive an external mode selection instruction and input it to the main control module 400. Specifically, the interaction module 300 includes a display 301 and a key 302, and realizes data interaction and transmission through a communication module 303, such as a Bluetooth and RS485 communication module. In practice, the above key 302 and 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, and is used to acquire and automatically or based on the mode selection instruction input by the interaction module 300, output a PWM power control signal according to the current measurement data, voltage parameter data, and load type of the power distribution line to control the on-off state of the switch module 600. The above power control signal includes a voltage regulation and power control signal, a fixed-period power control signal, or a single-cycle power control signal.

[0081] The drive module 500 is electrically connected to the main control module 400 and the switch module 600, receives and responds to the power control signal output by the main control module 400, and outputs a 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 controllably connected to the driving module 500, and receives and responds to the driving control signal to control the power-on state of the load. In the embodiment of the present application, specifically, the switch module 600 is configured as a solid-state switch, disposed on the live wire of the power distribution line, and includes at least one group disposed 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 driving control signal output by the driving module 500.

[0083] As Figure 2 shown, in the embodiment of the present application, the solid-state switch includes 4 groups of NMOS transistors connected in reverse series. The gates of the two NMOS transistors included 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. The drains of the two NMOS transistors are arranged in parallel with the load. The above solution enables the entire solid-state switch to meet the on-off control requirements of high-power in the power distribution line, and can quickly respond to the driving control signal to adjust the on-off state of the solid-state switch, and can effectively block the discharge effect of the body diode in the MOS transistor, realizing an accurate, fast and stable switching effect.

[0084] Combined with Figure 3 shown, in the embodiment of the present application, the main control module 400 includes: a data receiving sub-module 401, a mode selection sub-module 402, a display data output sub-module 403, a control instruction output sub-module 404, and a data storage sub-module 405.

[0085] The data receiving sub-module 401 is configured to receive current measurement data, voltage parameter data, and load type, and receive a mode selection instruction input externally from the interaction module 300. In practical applications, the above data receiving sub-module 401 includes a plurality of different data input interfaces.

[0086] The mode selection sub-module 402 has a built-in mode selection algorithm, and is used to select different power regulation modes and output corresponding power regulation control signals according to the externally input mode selection instruction, or according to the current measurement data, voltage parameter data, and load type, and based on the mode selection algorithm. Correspondingly, the power regulation control program includes a voltage regulation and power regulation program module, a fixed-period power regulation sub-module, and a single-cycle power regulation sub-module. The display data output sub-module 403 is data-connected to the interaction module 300, and is used to convert and output electrical parameter information and power regulation mode information, so as to facilitate the user to check the power supply parameters of the current power distribution line. The control instruction output sub-module 404 is data-connected to the driving module 500, and is used to output the power regulation control signal to the driving module 500, as Figure 4 shown in the circuit schematic diagram of the driving module 500.

[0087] The data storage sub-module 405 is configured in the main control module 400 or as an external storage unit that is data-connected to the mode selection sub-module 402, such as an external storage chip, for storing current measurement data, voltage parameter data, load types, and power regulation control program modules corresponding to different power regulation modes. Preferably, in the embodiment of the present application, the power regulation control program modules corresponding to the above power regulation modes are all configured in the main control chip. In the embodiment of the present application, the main control chip preferably uses a single-chip microcomputer.

[0088] In practical applications, different types of loads can correspond to multiple power regulation modes. For example, when resistive loads such as electric heaters and incandescent lamps are connected to the line, all three power regulation modes can be applied, specifically depending on the response speed, harmonic tolerance, and system inertia. If the current power regulation mode for the resistive load is voltage regulation and power regulation, and the load type is likely to switch to a capacitive load within a future set time period, then the current power regulation mode can be changed to fixed-period power regulation, which not only does not affect the power control of the current resistive load but also adapts to the possible capacitive load.

[0089] To achieve the above effects, preferably, in combination with Figure 3 As shown, in the embodiment of the present application, the main control module 400 is further configured or connected with a historical data storage sub-module 406, a load type prediction sub-module 407, an adaptation relationship storage sub-module 408, and a transition mode output sub-module 409.

[0090] The historical data storage sub-module 406 is data-connected to the data receiving sub-module 401 and is used to store historical current parameters. Due to the large amount of data, the above historical data storage sub-module 406 preferably uses an external storage chip to implement. The load type prediction sub-module 407 has a built-in type prediction algorithm and is data-connected to the historical data storage module. It estimates the load type within a set time period based on historical current parameters and outputs it. In practical applications, the above load type prediction sub-module 407 is configured as a program module loaded in the main control chip. It analyzes the change trend of historical current parameters to obtain the time rules for various types of loads to access the distribution line. For example, the lighting in the square is turned on 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 current in the distribution line.

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

[0092] In the scenario of multiple loads accessing the distribution line, based on the above solution, the change law of the load type on the distribution line can be predicted through historical current parameter data, and the load type within a future set time period can be predicted. Then, according to the power adjustment mode adapted to the conversion process of different types of loads, the power adjustment mode can be changed in advance, so as to adjust the power output timely and smoothly when the load type changes and maintain a constant power output.

[0093] Further optimized, an alarm module 410 is also configured in the main control module 400, which is configured to be connected to the load identification module 200, the drive module 500 and the display data output sub-module 403 for data connection, receive the load type output by the load identification module 200. If a malignant load is detected and identified, such as a direct heating electrical appliance with a pure resistive load, a cut-off signal is output to the drive module 500 to control the switch module 600 to disconnect, and at the same time, an alarm message is output to the display data output sub-module 403. The above technical solution can protect the line itself.

[0094] Based on the above power adjustment circuit, an embodiment of the present application also discloses a method for adjusting the constant output power of a distribution network based on a solid-state switch, as Figure 5 shown, which mainly includes the following steps:

[0095] S100, associatively store each load type and its adapted power adjustment mode;

[0096] S200, detect and obtain the current parameters of the distribution line, and analyze and generate the load type;

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

[0098] S310, if the current power adjustment mode is adapted to the current load type, maintain the current power adjustment mode;

[0099] S320, if the current power adjustment mode is not adapted to the current load type, detect and obtain the power control mode of the current distribution line;

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

[0101] S322, if it is in the manual control mode, detect the external instruction input status:

[0102] S3221, if an external instruction is detected within the set time, respond to the input external mode selection instruction signal, confirm the corresponding power adjustment mode, and output a power adjustment control signal;

[0103] S3222, if no external instruction is detected within the set time, switch to the automatic control mode.

[0104] The power regulation modes in the above steps include: voltage regulation and power regulation, fixed-period power regulation, or single-cycle power regulation. When the circuit is connected to resistive loads, such as electric heaters and incandescent lamps, all three power regulation modes are applicable, specifically depending on the response speed, harmonic tolerance, and system inertia. When the circuit is connected to capacitive loads, such as capacitors and capacitive filter circuits, voltage regulation and power regulation and fixed-period power regulation are applicable, while single-cycle power regulation is not. When the circuit is connected to inductive loads, such as motors and transformers, fixed-period power regulation and voltage regulation and power regulation are applicable, while single-cycle power regulation is not.

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

[0106] When there is a change in the load type in the distribution line, such as Figure 6 shown, the method further includes:

[0107] A100, obtaining and storing historical current parameter data, and analyzing and generating a prediction model for characterizing the change law of the load type. In specific practice, the above change law is manifested as the change law of the phase between current and voltage over time.

[0108] A200, obtaining the power regulation modes adapted to the switching process of different types of loads on the distribution line and storing them as an adaptation relationship library. The above adaptation relationship library is used to change the power regulation mode in advance by a set time when the load type is expected to switch, so as to achieve a stable transition effect.

[0109] A300, obtaining and based on the current current parameters of the distribution line, estimating the load type within a future set time period based on the prediction model, and correspondingly generating the power regulation mode within the future set time period.

[0110] A400, obtaining the current power regulation mode and the power regulation mode within the future set time period, and combining the adaptation relationship library to find and confirm the power regulation mode adapted to the switching process.

[0111] Specifically, the adaptation relationship library includes:

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

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

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

[0115] In conventional practice, the operation process of the method for adjusting the constant output power of a distribution network based on a solid-state switch described in the embodiments of the present application can be summarized as follows:

[0116] First, the output power is set using the button 302 of the interaction 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 them to the main control module 400 respectively. At this time, the manual mode or the automatic mode can be selected to ensure the output of constant power. If the manual mode is selected, one of the three power regulation methods, namely voltage regulation power regulation, fixed-cycle power regulation, and single-cycle power regulation, can be set through the button 302 by oneself; if it is the automatic mode, 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 load type connected to the distribution line changes over time, for example, in the case of an air conditioner, usually only the motor drives the fan or compressor to work, which can be regarded as an inductive load. When the air conditioner turns on the electric heating auxiliary mode and only preheats with the heating wire, it becomes a resistive load. At this time, the power regulation mode can be changed in advance to the voltage regulation power regulation mode that is suitable for both inductive loads and resistive loads.

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

Claims

1. A constant output power adjustment circuit for a power distribution network based on a solid-state switch, characterized in that: include: A current parameter acquisition module (100), coupled to the power distribution line, for acquiring and outputting current metering data and voltage parameter data in the power distribution line; A load identification module (200) is electrically connected to the current parameter acquisition module (100), and identifies and outputs a circuit load type based on the current measurement data and voltage parameter data in combination with a specific algorithm model; An interactive module (300) is electrically connected to the main control module (400) and the external interactive component, and is used to receive and display electrical parameter information, and receive an external mode selection instruction and input it into the main control module (400); A 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 output a power regulation control signal to control the on / off state of the switch module (600) automatically or based on the mode selection instruction according to the current metering data, voltage parameter data and load type of the distribution line; A driving module (500) is electrically connected to the main control module (400) and the switch module (600), receives and outputs a driving control signal in response to the power regulation control signal to control the on / off state of the switch module (600); A switch module (600) is arranged between the power distribution line and the load and is control-connected to the drive module (500), and receives and controls the power-on state of the load in response to the drive control signal; Wherein, the power regulation control signal includes a voltage regulation power regulation signal, a fixed-cycle power regulation signal or a single-cycle power regulation signal; The switch module (600) comprises at least one group of solid-state switches arranged on the power distribution circuit and composed of two MOS tubes connected in reverse series, the gates of the two MOS tubes being respectively coupled to the drive control signals output by the drive module (500).

2. The constant output power adjustment circuit for a power distribution network based on a solid-state switch according to claim 1, characterized in that: The current parameter acquisition module (100) comprises: A current transformer (101) is arranged on a live line of a power distribution line and is used to collect and output a current signal of the power distribution line; A metering module (102), electrically connected to the current transformer (101), configured to receive and generate the current metering data based on the current signal; A zero-crossing detection module (103), electrically connected to the current transformer (101), and used to detect voltage parameter data generated by the output end of the current transformer (101) through load resistance conversion; The output ends of the metering module (102) and the zero-crossing detection module (103) are both signal-connected to the signal input end of the main control module (400).

3. The constant output power adjustment circuit for a power distribution network based on a solid-state switch according to claim 1, characterized in that: The solid-state switch includes a plurality of groups of NMOS tubes connected in reverse series; The gates of the two NMOS tubes contained 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 tubes are both coupled to the Source signal output by the driving module (500), and the drains of the two NMOS tubes are connected in parallel with the load.

4. The constant output power adjustment circuit for a power distribution network based on a solid-state switch according to claim 2, characterized in that: The main control module (400) comprises: A data receiving submodule (401) configured to receive the current metering data, voltage parameter data and load type, and receive a mode selection instruction input externally from the interaction module (300); A mode selection submodule (402) having a built-in mode selection algorithm, for selecting different power adjustment modes according to an externally input mode selection instruction, or according to the current measurement data, voltage parameter data and load type, and based on the mode selection algorithm, and outputting corresponding power adjustment control signals; A display data output submodule (403) is data-connected to the interaction module (300) and is used to convert and output electrical parameter information and power regulation mode information; A control instruction output submodule (404), which is data-connected to the driving module (500) and is used to output the power regulation control signal to the driving module (500); A data storage submodule (405), configured in the main control module (400), or configured as an external storage unit data-connected to the mode selection submodule (402), for storing the current metering data, voltage parameter data, load type, and power regulation control program modules corresponding to different power regulation modes; 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.

5. The constant output power adjustment circuit for a power distribution network based on a solid-state switch according to claim 4, characterized in that: The main control module (400) is also configured or connected with: A historical data storage submodule (406), which is data-connected to the data receiving submodule (401) and is used to store historical current parameters; A load type prediction submodule (407) having a built-in type prediction algorithm, connected to the historical data storage module, and estimating the load type within a set period based on the historical current parameters and outputting the estimate; An adaptation relationship storage submodule (408), configured to store power regulation 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 with the load type prediction submodule (407) and the adaptation relationship storage submodule (408), search for the corresponding power adjustment mode according to the current load type and the load type, and output a power adjustment control signal.

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

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

8. A method for adjusting constant output power of a power distribution network based on solid-state switches, characterized in that: A distribution network constant output power adjustment circuit based on a solid-state switch as claimed in any one of claims 1 to 7 is used, comprising: Associate and store various load types and their adapted power regulation modes; Detect and obtain the current parameters of the distribution line and analyze and generate the load type; Get the current power adjustment mode: If the current power adjustment mode is compatible with the current load type, the current power adjustment mode is maintained; If the current power regulation mode is not suitable for the current load type, then: Detect and obtain the power control mode of the current distribution line. If it is the automatic control mode, search and confirm the corresponding power adjustment mode based on the current load type, and output the power adjustment control signal; If it is in manual control mode, detect the external command input status: If an external command is detected within the 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; If no external command is detected within the set time, it will switch to automatic control mode; The power regulation modes include: voltage regulation, fixed-cycle power regulation or single-cycle power regulation.

9. The method for adjusting constant output power of a power distribution network based on solid-state switches according to claim 8, characterized in that: The method further comprises: Acquire and store historical current parameter data, analyze and generate a prediction model to characterize the changing rules of load types; Obtain power regulation modes adapted to the switching processes of different types of loads on distribution lines and store them as an adaptation relationship library; Obtaining and estimating the load type in a future set period based on the prediction model according to the current current parameters of the distribution line, and correspondingly generating a power regulation mode in the future set period; The current power adjustment mode and the power adjustment mode within a future set period are obtained, and the power adjustment mode adapted for the switching process is searched and confirmed in combination with the adaptation relationship library.

10. The method for adjusting constant output power of a power distribution network based on solid-state switches according to claim 9, characterized in that: The adaptation relationship library includes: When it is detected that the load type is about to switch from an inductive load or a capacitive load to a resistive load, the current power regulation mode is maintained and switched to the 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 capacitive load, if the current power regulation mode is single-cycle power regulation mode, the power regulation mode is switched to voltage regulation power regulation or fixed-cycle power regulation; otherwise, the current power regulation mode is 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 a resistive load to an inductive load, if the current power regulation mode is a single-cycle power regulation mode, the power regulation mode is switched to a fixed-cycle power regulation mode or a voltage regulation power regulation mode; otherwise, the current power regulation mode is maintained and switched to the fixed-cycle power regulation mode after a set period of time in the future.

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