Load switching control device and method

Abstract

The invention provides a load switching control device and method, the load switching control device comprises a main control module and M wireless loading and unloading execution modules, and the main control module is connected with the M wireless loading and unloading execution modules through a wireless network; the wireless loading and unloading execution module collects an electric signal of a corresponding switch unit and sends state information representing a power supply state and a switch state to the main control module; the master control module generates a control command corresponding to the wireless loading and unloading execution module based on the received state information and sends the control command to each wireless loading and unloading execution module based on the load priority, and the wireless loading and unloading execution module controls the on-off state of the switch unit after receiving the control command. The main control module and the wireless loading and unloading execution module are connected through the wireless network, the main control module runs a switching logic program, and the wireless loading and unloading execution module drives the switch unit based on the control command sent by the main control module, so that the wiring can be simplified, and the installation and maintenance difficulty can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage power distribution systems, and in particular to a load switching control device and method. Background Art

[0002] During the switching process of the power conversion system, the load switching control device can perform load cutting and switching based on the importance of the load, thereby increasing and decreasing the load step by step and improving the reliability and safety of the power supply.

[0003] In existing technology, load-switching control devices are primarily centralized, hard-wired to each circuit breaker's switch position signals, protection signals (such as overload and short-circuit signals), and power status signals. All signals are centrally transmitted to a single controller for processing. The controller has a built-in fixed logic program that drives output relays according to preset rules, controlling the opening and closing of circuit breakers to achieve load switching.

[0004] The controller in the load switching control device provided by the prior art needs to process a large number of input signals and control signals, which makes the wiring and operation procedures complicated, increases the difficulty of installation and maintenance, cannot be adapted to different projects, and has low applicability. Summary of the Invention

[0005] The present application provides a load switching control device and method to solve the problems in the prior art of centralized load switching control devices, such as complex structure, high difficulty in installation and maintenance, and low applicability.

[0006] In a first aspect, the present application provides a load switching control device, which is applied to a low-voltage power distribution system. The load switching control device includes a main control module and M wireless load addition and subtraction execution modules, wherein the main control module and the M wireless load addition and subtraction execution modules are connected via a wireless network, and M is a positive integer;

[0007] The wireless load addition and subtraction execution module is configured to collect electrical signals from the switch unit corresponding to the wireless load addition and subtraction execution module, determine a power supply state and a switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signals, and send status information representing the power supply state and the switch state to the main control module; and upon receiving a control command sent by the main control module, control the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module;

[0008] The main control module is configured to generate a control command corresponding to the wireless load addition and subtraction execution module based on the received status information sent by the wireless load addition and subtraction execution module; and send the control command to each wireless load addition and subtraction execution module based on the load priority level.

[0009] In a possible implementation, the main control module is further configured to:

[0010] Broadcasting a query command to the M wireless load addition and reduction execution modules;

[0011] The wireless load addition and reduction execution module is further used for:

[0012] After receiving the query command, obtaining an electrical signal of a switch unit corresponding to the wireless load addition and subtraction execution module;

[0013] The wireless load addition and reduction execution module is specifically used for:

[0014] The status information is sent to the main control module based on its own device address.

[0015] In a possible implementation, the wireless load addition and reduction execution module includes:

[0016] a collection unit configured to, after collecting an electrical signal from a switch unit corresponding to the wireless load addition and subtraction execution module, isolate the electrical signal and transmit the processed electrical signal;

[0017] a first processing unit, configured to determine a power state and a switch state of a switch unit corresponding to the wireless load addition and subtraction execution module based on the processed electrical signal, generate the state information, and, upon receiving the control command, convert the control command into a control signal, and output the control signal to a first output unit;

[0018] The first output unit is configured to control a switching state of a switch unit corresponding to the wireless load addition and subtraction execution module based on the control signal;

[0019] The first wireless transceiver unit is configured to send the status information to the main control module, receive a control command sent by the main control module, and send the control command to the first processing unit.

[0020] In a possible implementation, the first wireless transceiver unit includes a first inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first wireless LoRa chip, a first diode, and a first transistor;

[0021] The voltage input end of the first wireless loRa chip is electrically connected to the first end of the first inductor, the first end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor. The fifth input pin of the first wireless loRa chip is electrically connected to the first end of the first resistor, the first end of the second resistor, and the first end of the fourth capacitor. The sleep request end of the first wireless loRa chip is electrically connected to the first end of the third resistor for receiving a sleep request signal. The state control end of the first wireless loRa chip is electrically connected to the first end of the fourth resistor. The receiving end of the first wireless loRa chip is used to receive the control command, and the transmitting end of the first wireless loRa chip is used to send the status information;

[0022] The second end of the fourth resistor is electrically connected to the first end of the fifth resistor and the control end of the first transistor;

[0023] The first end of the first transistor and the second end of the fifth resistor are both electrically connected to the ground end, and the second end of the first transistor is electrically connected to the cathode of the first diode;

[0024] The anode of the first diode is electrically connected to the first end of the sixth resistor;

[0025] The second end of the first inductor, the second end of the third resistor, and the second end of the sixth resistor are all used to receive a first input voltage;

[0026] The second end of the first resistor is used to receive a second input voltage;

[0027] The second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, and the second end of the second resistor are all electrically connected to the ground end.

[0028] In a possible implementation, the acquisition unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second diode, a third diode, a fifth capacitor, a sixth capacitor, and a photoelectric coupler;

[0029] A first end of the seventh resistor is electrically connected to one end of the switch unit for collecting the electrical signal, and a second end of the seventh resistor is electrically connected to the first end of the eighth resistor, the cathode of the second diode, the first end of the fifth capacitor, and the first end of the photoelectric coupler;

[0030] The second end of the eighth resistor, the anode of the second diode, the second end of the fifth capacitor, and the second end of the photoelectric coupler are all electrically connected to the ground end;

[0031] The third end of the photoelectric coupler is electrically connected to the first end of the ninth resistor, the cathode of the third diode, and the first end of the sixth capacitor, for transmitting the processed electrical signal, and the fourth end of the photoelectric coupler and the second end of the sixth capacitor are both electrically connected to the ground end;

[0032] The first end of the tenth resistor is electrically connected to the anode of the third diode;

[0033] The second end of the ninth resistor and the second end of the tenth resistor are used to receive the third input voltage.

[0034] In a possible implementation, the first output unit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourth diode, a fifth diode, a seventh capacitor, a second transistor, and a first relay;

[0035] A first end of the coil of the first relay is electrically connected to the anode of the fifth diode, the cathode of the fourth diode, and the first end of the second transistor; a second end of the coil of the first relay is electrically connected to the cathode of the fifth diode and the first end of the eleventh resistor, for receiving a fourth input voltage; a normally open contact of the first relay and a common end of the first relay are electrically connected to a control circuit of the switch unit;

[0036] The second end of the eleventh resistor is electrically connected to the anode of the fourth diode;

[0037] The control end of the second transistor is electrically connected to the first end of the twelfth resistor, the first end of the thirteenth resistor, and the first end of the seventh capacitor, and the second end of the second transistor, the second end of the thirteenth resistor, and the second end of the seventh capacitor are all electrically connected to the ground end;

[0038] The second end of the twelfth resistor is used to input the control command.

[0039] In a possible implementation, the wireless load addition and reduction execution module further includes a first parameter memory, a first watchdog unit, a first real-time clock unit, a switch input unit, a first program download port, and a first debugging port;

[0040] The first parameter memory, the first watchdog unit, the first real-time clock unit, the switch input unit, the first program download port and the first debugging port are all electrically connected to the first processing unit.

[0041] In a possible implementation, the main control module includes:

[0042] A second wireless transceiver unit is configured to receive the status information sent by the wireless load addition and reduction execution module, and send the status information to the second processing unit; and send the received control command to the wireless load addition and reduction execution module;

[0043] The second processing unit is configured to generate a control command corresponding to the wireless addition and subtraction execution module based on the received status information; generate a control command corresponding to each wireless addition and subtraction execution module based on the load priority level, and send the generated control command to the second wireless transceiver unit.

[0044] In a possible implementation, the main control module further includes a second output unit;

[0045] The second output unit is electrically connected to the second processing unit;

[0046] The second output unit is used to control the switch state of the switch unit connected to the main control module based on the received state information.

[0047] In a possible implementation, the main control module further includes a first bus port, a second bus port, an Ethernet port, a human-computer interaction interface port, a second program download port, a second debugging port, a second parameter memory, a second door dog unit and a second real-time clock unit;

[0048] The first bus port, the second bus port, the Ethernet port, the human-computer interaction interface port, the second program download port, the second debugging port, the second parameter memory, the second dog guard unit and the second real-time clock unit are all electrically connected to the second processing unit.

[0049] In a second aspect, the present application provides a load switching control method, applied to the load switching control device according to any one of the first aspects, the method comprising:

[0050] collecting, by the wireless load addition and subtraction execution module, an electrical signal of a switch unit corresponding to the wireless load addition and subtraction execution module, determining a power supply state and a switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signal, and sending state information representing the power supply state and the switch state to the main control module;

[0051] The main control module generates a control command corresponding to the wireless load addition and subtraction execution module based on the received status information sent by the wireless load addition and subtraction execution module; and sends the control command to each wireless load addition and subtraction execution module based on the load priority level;

[0052] After receiving the control command sent by the main control module through the wireless load addition and subtraction execution module, the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module is controlled.

[0053] The beneficial effects of this application are as follows:

[0054] The present application provides a load switching control device and method, which are applied to a low-voltage power distribution system. The load switching control device includes a main control module and M wireless load addition and subtraction execution modules, wherein the main control module is connected to the M wireless load addition and subtraction execution modules via a wireless network; the wireless load addition and subtraction execution modules collect electrical signals from corresponding switch units and send status information representing power supply status and switch status to the main control module; the main control module generates control commands for the corresponding wireless load addition and subtraction execution modules based on the received status information, and sends control commands to each wireless load addition and subtraction execution module based on the load priority level. After receiving the control commands, the wireless load addition and subtraction execution modules control the switch status of the corresponding switch units. Since the load switching control device provided in the embodiment of the present application includes a wireless load addition and subtraction execution module and a main control module, the main control module runs the switching logic program, and the wireless load addition and subtraction execution module drives the switch unit based on the control command sent by the main control module, thereby simplifying the operating program in the main control module, and the main control module does not need to process a large number of control signals. Since the main control module does not need to be connected to the switch unit, it can be adapted to different projects, thereby improving the applicability of the load switching control device. In addition, the main control module and the wireless load addition and subtraction execution module are connected via a wireless network, thereby simplifying wiring and reducing the difficulty of installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0056] Figure 1 A schematic structural diagram of a centralized load switching control device provided in an embodiment of the present application;

[0057] Figure 2 A schematic diagram of the operation of a centralized load switching control device provided in an embodiment of the present application;

[0058] Figure 3 A schematic structural diagram of a load switching control device provided in an embodiment of the present application;

[0059] Figure 4 A schematic diagram of the structure of a wireless load addition and reduction execution module provided in an embodiment of the present application;

[0060] Figure 5 A circuit diagram of a first wireless transceiver unit provided in an embodiment of the present application;

[0061] Figure 6 A circuit diagram of a collection unit provided in an embodiment of the present application;

[0062] Figure 7 A circuit diagram of a first output unit provided in an embodiment of the present application;

[0063] Figure 8 A schematic structural diagram of another wireless load addition and reduction execution module provided in an embodiment of the present application;

[0064] Figure 9 The structural intention of a main control module provided in an embodiment of the present application;

[0065] Figure 10 Another structural intention of the main control module provided in the embodiment of the present application;

[0066] Figure 11 A schematic structural diagram of another load switching control device provided in an embodiment of the present application;

[0067] Figure 12 A schematic structural diagram of another load switching control device provided in an embodiment of the present application;

[0068] Figure 13 Another structural intention of the main control module provided in the embodiment of the present application;

[0069] Figure 14 A schematic diagram of a communication timing provided in an embodiment of the present application;

[0070] Figure 15 A flow chart of a load switching control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0071] To make the objectives, technical solutions, and advantages of this application more clear, this application will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0072] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0073] Load switching control devices play an important role in low-voltage power distribution systems. They can cut off and put loads into operation in stages according to their importance, thereby increasing and decreasing loads step by step, thereby ensuring that the converted power supply is put into use more reliably and safely.

[0074] In the related art, a centralized load switching device is usually used, such as Figure 1 As shown in FIG, a structural diagram of a centralized load switching control device provided by the related art, the centralized load switching control device includes a controller and multiple switch units (K1, K2, K3, K4, K5, K6, K7), S1 incoming line is connected to the first power supply, S2 incoming line is connected to the second power supply, as shown in FIG. Figure 2 The figure shows a schematic diagram of the operation of a centralized load switching device provided by the related art. The controller needs to sample and process the relevant parameters of all switch units (i.e., the circuit breaker protection signals and switch positions of each load level), run the preset logic program, perform the corresponding switching process, and output power switching signals and / or level-by-level disconnection and closing signals.

[0075] For example, refer to Figure 1 and Figure 2 If the power switching signal sent by the controller is to close the switch unit K1, the switch unit K1 is closed after receiving the power switching signal. If the power switching signal sent by the controller is to open the switch unit K1, the switch unit K1 is opened after receiving the power switching signal.

[0076] For example, refer to Figure 1 and Figure 2 If the controller sends a step-by-step on-off signal to close the switch unit K3, the switch unit K3 is closed after receiving the step-by-step on-off signal.

[0077] Figure 1 In the embodiment, if the switch unit K1 and the switch unit K3 are both closed, the first power supply supplies power to the load 1; if the switch unit K1 is open, and the switch units K2, K3, and K7 are all closed, the second power supply supplies power to the load 1.

[0078] The above is only an example of how to power load 1. The power supply of other loads can refer to the example of powering load 1.

[0079] The centralized load switching device provided by the related technology requires not only high-precision wire connection but also the interconnection between each switch unit. It also involves a variety of electrical equipment and requires the use of complex wiring diagrams and junction boxes, which increases the difficulty of installation and maintenance.

[0080] Furthermore, centralized load switching devices are often used in specialized, custom applications with high overall system requirements. Applications vary significantly from project to project, and even the same equipment may be prioritized based on varying requirements. Due to the varying number and configuration of incoming lines, it's impossible to design a universal controller to meet the needs of all specialized applications.

[0081] In order to solve the above problems, an embodiment of the present application provides a load switching control device and method. For ease of understanding, the load switching control device and method provided in the embodiment of the present application are described in detail below with reference to the accompanying drawings.

[0082] like Figure 3 As shown, it is a structural schematic diagram of a load switching control device provided in an embodiment of the present application. The load switching control device 30 is applied to a low-voltage power distribution system. The low-voltage power distribution system also includes a power supply, a switch unit and a load. The load switching control device includes a main control module 31 and M wireless load addition and subtraction execution modules (321, 322, 323, ... 32M). The main control module 31 and the M wireless load addition and subtraction execution modules (321, 322, 323, ... 32M) are connected via a wireless network. M is a positive integer, and the wireless load addition and subtraction execution modules correspond to the switch units one by one.

[0083] The wireless load addition and subtraction execution module is configured to collect electrical signals from the switch unit corresponding to the wireless load addition and subtraction execution module, determine the power supply state and the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signals, and send status information representing the power supply state and the switch state to the main control module 31; and upon receiving the control command sent by the main control module 31, control the switch state of the switch unit 33M corresponding to the wireless load addition and subtraction execution module;

[0084] The main control module 31 is configured to generate control commands corresponding to the wireless load addition and subtraction execution modules based on the received status information sent by the wireless load addition and subtraction execution modules; and send control commands to each wireless load addition and subtraction execution module based on the load priority level.

[0085] A load switching control device provided in the present application is applied to a low-voltage power distribution system. The load switching control device includes a main control module and M wireless load addition and subtraction execution modules, wherein the main control module is connected to the M wireless load addition and subtraction execution modules via a wireless network; the wireless load addition and subtraction execution modules collect electrical signals from corresponding switch units and send status information representing power supply status and switch status to the main control module; the main control module generates control commands for the corresponding wireless load addition and subtraction execution modules based on the received status information, and sends control commands to each wireless load addition and subtraction execution module based on the load priority level. After receiving the control commands, the wireless load addition and subtraction execution modules control the switch status of the corresponding switch units. Since the load switching control device provided in the embodiment of the present application includes a wireless load addition and subtraction execution module and a main control module, the main control module runs the switching logic program, and the wireless load addition and subtraction execution module drives the switch unit based on the control command sent by the main control module, thereby simplifying the operating program in the main control module, and the main control module does not need to process a large number of control signals. Since the main control module does not need to be connected to the switch unit, it can be adapted to different projects, thereby improving the applicability of the load switching control device. In addition, the main control module and the wireless load addition and subtraction execution module are connected via a wireless network, thereby simplifying wiring and reducing the difficulty of installation and maintenance.

[0086] It should be noted that the switch unit in the load switching control device includes a unit connected to the load, such as: Figure 1 The switch unit K3, switch unit K4, switch unit K5 and switch unit K6 in the embodiment also include a switch unit connected to a power supply, for example, Figure 1 The switch unit K1 and switch unit K2 in the embodiment also include switch units connected to the busbar, such as Figure 1 Switch unit K7 in.

[0087] The switch unit in the embodiment of the present application may be a circuit breaker or other switch unit, which is not limited in the embodiment of the present application.

[0088] In another embodiment, the main control module 31 and the M wireless load addition and subtraction execution modules may also be connected via communication cables.

[0089] In one embodiment, the multiple wireless load addition and subtraction execution modules in the load switching control device can be distinguished by device addresses, and priorities are set for the wireless load addition and subtraction execution modules corresponding to the loads based on the priorities of the loads.

[0090] In the embodiment of the present application, each wireless load addition and reduction execution module has its own device address. For example, the device address of the wireless load addition and reduction execution module 321 is 001, and the device address of the wireless load addition and reduction execution module 322 is 002.

[0091] Based on the priority of the load, the priority of the wireless load addition and reduction execution module corresponding to the load is set. For example, the wireless load addition and reduction execution module corresponding to load 1 is wireless load addition and reduction execution module 321, and the wireless load addition and reduction execution module corresponding to load 2 is wireless load addition and reduction execution module 322. The priority of load 1 is higher than the priority of load 2, and the priority of wireless load addition and reduction execution module 321 is higher than the priority of wireless load addition and reduction execution module 322.

[0092] It should be noted that the wireless load addition and subtraction execution module can be installed in a low-voltage distribution cabinet together with the switch unit; the main control module can be installed in a separate panel, or it can be installed in a low-voltage distribution cabinet together with the wireless load addition and subtraction execution module and the switch unit. This application does not impose any specific restrictions.

[0093] In one embodiment, if Figure 4 As shown, it is a structural schematic diagram of a wireless load addition and reduction execution module provided in an embodiment of the present application. For each wireless load addition and reduction execution module in the load switching control device, the wireless load addition and reduction execution module includes a collection unit 401, a first processing unit 402, a first wireless transceiver unit 403 and a first output unit 404. The first processing unit 402 is electrically connected to the sampling unit 401, the first wireless transceiver unit 403 and the first output unit 404 respectively.

[0094] The acquisition unit 401 is used to collect the electrical signal of the switch unit corresponding to the wireless load addition and subtraction execution module, perform optical coupling isolation processing on the electrical signal, and send the processed electrical signal;

[0095] The first processing unit 402 is configured to determine the power state and the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the processed electrical signal, and generate state information; and upon receiving a control command sent by the first wireless transceiver unit 403, send a control signal corresponding to the control command to the first output unit 404;

[0096] The first wireless transceiver unit 403 is configured to send status information to the main control module 31, receive control commands sent by the main control module 31, and send the control commands to the first processing unit 402;

[0097] It should be noted that, after receiving the control command, the first wireless transceiver unit 403 converts the control command into TTL level serial data and then sends it to the first processing unit 402 .

[0098] The first output unit 404 is configured to control the switch unit based on the control signal after receiving the control signal.

[0099] Specifically, the sampling unit 401 may be electrically connected to one end of the switch unit, for example, electrically connected to a fixed contact of a circuit breaker, or electrically connected to a movable contact of a circuit breaker;

[0100] The first processing unit 402 can adopt an ARM microcontroller with at least 64KB of running memory and 512KB of flash memory; in addition, the first wireless transceiver unit 403 can run at 433Mhz, and the unobstructed transmission distance can reach 2KM. The first wireless transceiver unit 403 can have a built-in TTL level data bus, which converts data into wireless data for real-time communication with the main control module 31, that is, the first wireless transceiver unit 403 converts the received control command into TTL level serial data that is easy for the first processing unit 402 to process.

[0101] like Figure 5 As shown, it is a circuit diagram of a first wireless transceiver unit provided by the embodiment of the present application. The first wireless transceiver unit 403 includes a first inductor L1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first wireless LoRa chip, a first diode D1 and a first transistor Q1;

[0102] The voltage input terminal VCC of the first wireless loRa chip is electrically connected to the first end of the first inductor L1, the first end of the first capacitor C1, the first end of the second capacitor C2, and the first end of the third capacitor C3. The fifth input pin D5 of the first wireless loRa chip is electrically connected to the first end of the first resistor R1, the first end of the second resistor R2, and the first end of the fourth capacitor C4. The sleep request pin D1 / SLEEP_RQ of the first wireless loRa chip is electrically connected to the first end of the third resistor R3. The sleep request pin D1 / SLEEP_RQ of the first wireless loRa chip is used to receive the sleep request signal SLEEP_RQ. The status control pin STATUS of the first wireless loRa chip is electrically connected to the first end of the fourth resistor R4. The receiving end RX of the first wireless loRa chip is used to receive the control command output by the first processing unit 402, and the transmitting end TX of the first wireless loRa chip is used to send status information;

[0103] The second end of the fourth resistor R4 is electrically connected to the first end of the fifth resistor R5 and the control end of the first transistor Q1;

[0104] The first end of the first transistor Q1 and the second end of the fifth resistor R5 are both electrically connected to the ground end, and the second end of the first transistor Q1 is electrically connected to the cathode of the first diode D1;

[0105] An anode of the first diode D1 is electrically connected to a first end of the sixth resistor R6;

[0106] The second end of the first inductor L1, the second end of the third resistor R3, and the second end of the sixth resistor R6 are all used to receive the first input voltage 3V3_LORA;

[0107] The second end of the first resistor R1 is used to receive the second input voltage VCC_S;

[0108] The second end of the first capacitor C1 , the second end of the second capacitor C2 , the second end of the third capacitor C3 , the second end of the fourth capacitor C4 , and the second end of the second resistor R2 are all electrically connected to the ground.

[0109] In the embodiment of the present application, the control end of the first transistor Q1 is the base of the transistor, the first end of the first transistor Q1 is the emitter of the transistor, and the second end of the first transistor Q1 is the collector of the transistor.

[0110] like Figure 6 , which is a circuit diagram of a collection unit provided by the present application, wherein the collection unit 401 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a second diode D2, a third diode D3, a fifth capacitor C5, a sixth capacitor C6, and a photoelectric coupler OC;

[0111] A first end of a seventh resistor R7 is electrically connected to one end of the switch unit and is used to collect an electrical signal from the switch unit corresponding to the wireless load addition and subtraction execution module. A second end of the seventh resistor R7 is electrically connected to a first end of an eighth resistor R8, a cathode of a second diode D2, a first end of a fifth capacitor C5, and a first end of a photoelectric coupler OC.

[0112] The second end of the eighth resistor R8, the anode of the second diode D2, the second end of the fifth capacitor C5, and the second end of the photocoupler OC are all electrically connected to the ground end;

[0113] A third terminal of the photoelectric coupler OC is electrically connected to the first terminal of the ninth resistor R9, the cathode of the third diode D3, and the first terminal of the sixth capacitor C6, for sending the processed electrical signal to the first processing unit 402. A fourth terminal of the photoelectric coupler OC and a second terminal of the sixth capacitor C6 are both electrically connected to the ground terminal.

[0114] A first end of the tenth resistor R10 is electrically connected to the anode of the third diode D3;

[0115] The second end of the ninth resistor R9 and the second end of the tenth resistor R10 are used to receive the third input voltage VCC_3.3.

[0116] The collecting unit 401 is used to collect the electrical signals of the switch unit corresponding to the wireless load addition and subtraction execution module, perform optical coupling isolation processing on the collected electrical signals, and send the processed electrical signals to the first processing unit 402 .

[0117] In the embodiment of the present application, the seventh resistor R7 is used for current limiting, the fifth capacitor C5 and the sixth capacitor C6 are used for filtering, the second diode D2 is used to protect the circuit from damage by high voltage transients, and the third diode D3 is a light-emitting diode, used to indicate whether the third input voltage VCC_3.3 is normal. When the third diode D3 is lit, the third input voltage VCC_3.3 is confirmed, and when the third diode D3 is not lit, it is determined that the third input voltage VCC_3.3 is abnormal.

[0118] When the electrical signal collected by the acquisition unit 401 is at a low level of 0, the light-emitting diode in the photoelectric coupler OC does not work, so the transistor in the photoelectric coupler OC is also not turned on. At this time, the processed electrical signal is at a high level of 1;

[0119] When the electrical signal collected by the collection unit 401 is at a high level 1, the light emitting diode in the photoelectric coupler OC starts to work, and the transistor in the photoelectric coupler OC is turned on. At this time, the processed electrical signal is at a low level 0.

[0120] The switch unit in the embodiment of the present application may be a circuit breaker.

[0121] like Figure 7 FIG. 1 is a circuit diagram of a first output unit provided in an embodiment of the present application. Figure 7 , the first output unit includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourth diode D4, a fifth diode D5, a seventh capacitor C7, a second transistor Q2 and a first relay K1;

[0122] A first end of the coil of the first relay K1 is electrically connected to the anode of the fifth diode D5, the cathode of the fourth diode D4, and the first end of the second transistor Q2. A second end of the coil of the first relay K1 is electrically connected to the cathode of the fifth diode D5 and the first end of the eleventh resistor R11, and is configured to receive a fourth input voltage VCC_12. A normally open contact NO of the first relay K1 and a common terminal COM of the first relay are electrically connected to the control circuit of the switch unit.

[0123] A second end of the eleventh resistor R11 is electrically connected to the anode of the fourth diode D4;

[0124] A control end of the second transistor Q2 is electrically connected to a first end of the twelfth resistor R12, a first end of the thirteenth resistor R13, and a first end of the seventh capacitor C7, and a second end of the second transistor Q2, a second end of the thirteenth resistor R13, and a second end of the seventh capacitor C7 are all electrically connected to the ground end;

[0125] The second end of the twelfth resistor R12 is used for inputting a control command.

[0126] The first output unit 404 is used to convert the low-level control signal into a high voltage and a large current. The eleventh resistor R11 and the twelfth resistor R12 are used for current limiting, and the seventh capacitor C7 is used for filtering.

[0127] When the control command is a low-level signal, current flows through the twelfth resistor R12 into the base of the second transistor Q2 (i.e., the second terminal of the second transistor Q2), turning on the second transistor Q2. After the second transistor Q2 is turned on, the fourth input voltage VCC_12 flows through the coil of the first relay K1, energizing the coil of the first relay K1. The normally open contact NO of the first relay K1 is connected to the common terminal COM of the relay, thereby activating the control circuit of the switch unit, and the switch unit is turned on.

[0128] When the control command is a high-level signal, the second transistor Q2 is disconnected, the coil of the first relay K1 loses power, the normally open contact NO of the first relay K1 is disconnected from the common terminal COM of the relay, the control circuit of the switch unit is disconnected, and the switch unit is disconnected.

[0129] It should be noted that the switch unit may be a circuit breaker, and the control circuit of the switch unit is the control circuit of the circuit breaker.

[0130] like Figure 8 As shown, it is a structural diagram of another wireless load addition and reduction execution module provided in an embodiment of the present application. The wireless load addition and reduction execution module may further include a first parameter memory 405, a first watchdog unit 406, a first real-time clock unit 407, a switch input unit 408, a first program download port 409 and a first debugging port 410.

[0131] The first processing unit 402 is electrically connected to the first parameter memory 405, the first watchdog unit 406, the first real-time clock unit 407, the switch input unit 408, the first program download port 409, and the first debugging port 410, respectively.

[0132] The first parameter memory 405 is used to store switch loop parameters, etc.;

[0133] The first watchdog unit 406 is used to monitor the working power status of the wireless load addition and subtraction execution module;

[0134] The first real-time clock unit 407 is used to generate a clock signal;

[0135] The switch input unit 408 is used to collect the switch's open and close status, etc.

[0136] The first program download port 409 is used for burning programs;

[0137] The first debugging port 410 is used for debugging a program.

[0138] The above is a description of the specific structure of the wireless load addition and reduction execution module provided in the embodiment of the present application. The following is a description of the specific structure of the main control module provided in the embodiment of the present application.

[0139] like Figure 9 , which is a structural diagram of a main control module provided in an embodiment of the present application, the main control module 31 includes a second wireless transceiver unit 901 and a second processing unit 902 , and the second processing unit 902 is electrically connected to the second wireless transceiver unit 901 .

[0140] The second wireless transceiver unit 901 is configured to receive status information sent by the wireless load addition and reduction execution module and send the status information to the second processing unit 902; and send the received control command to the wireless load addition and reduction execution module;

[0141] The second processing unit 902 is used to generate a control command corresponding to the wireless addition and subtraction execution module based on the received status information; generate a control command corresponding to each wireless addition and subtraction execution module based on the load priority level, and send the generated control command to the second wireless transceiver unit 901.

[0142] The circuit diagram of the second wireless transceiver unit 901 in the embodiment of the present application is the same as the circuit diagram of the first wireless transceiver unit 403 described above. Figure 5 , no further description will be given here.

[0143] In a specific implementation, the main control module may further include a second output unit 903, such as Figure 10 As shown, it is a structural schematic diagram of another main control module provided in an embodiment of the present application. The second output unit 903 is electrically connected to the second processing unit 901. The second output unit 903 is used to control the switching state of the switching unit connected to the main control module based on the received status information. Specifically, the second output unit 903 converts the low-level control signal into high voltage and large current, and controls the conduction or disconnection of the switching unit through the second relay in the second output unit 903.

[0144] The specific circuit structure of the second output unit 903 may refer to the circuit structure of the first output unit 404 , and will not be repeated here.

[0145] In the embodiment of the present application, the second output unit 903 can control the switch unit on the bus, such as Figure 11 The busbar circuit breaker in the.

[0146] Figure 11 The system includes six circuit breakers. Except for the bus tie circuit breaker 333 on the busbar, each circuit breaker is equipped with a wireless load-on / load-off execution module. Specifically, circuit breaker 331 corresponds to wireless load-on / load-off execution module 321, circuit breaker 332 corresponds to wireless load-on / load-off execution module 322, circuit breaker 334 corresponds to wireless load-on / load-off execution module 324, circuit breaker 335 corresponds to wireless load-on / load-off execution module 325, and circuit breaker 336 corresponds to wireless load-on / load-off execution module 326.

[0147] Figure 11 In the example, the on / off operation of bus tie circuit breaker 333 is controlled by the second output unit in main control module 31, while the on / off operation of the other circuit breakers (circuit breakers 331, 332, 334, 335, and 336) is controlled by the first output unit in the wireless load addition / subtraction execution module corresponding to each circuit breaker. For example, the on / off operation of circuit breaker 331 is controlled by the first output unit in wireless load addition / subtraction execution module 321.

[0148] It should be noted that if a wireless load addition and reduction execution module is also configured for the bus tie circuit breaker, the main control module may not include the second output unit.

[0149] For example, Figure 12 As shown, the bus circuit breaker 333 is configured with a wireless load addition and reduction execution module 323, and the conduction and disconnection of the bus circuit breaker 333 are controlled by the first output unit in the wireless load addition and reduction execution module 323. In this application scenario, the main control module 31 may not include a second output unit.

[0150] Reference Figure 11 and Figure 12 The fixed contact of the switch unit 331 is electrically connected to the main power supply 1, and the wireless load addition and subtraction execution module 321 is also electrically connected to the fixed contact of the switch unit 331; the fixed contact of the switch unit 332 is electrically connected to the main power supply 2, and the wireless load addition and subtraction execution module 322 is also electrically connected to the fixed contact of the switch unit 332. The wireless load addition and subtraction execution module 321 determines the power state of the main power supply 1 and the switch state of the switch unit 331 based on the collected electrical signals. The wireless load addition and subtraction execution module 322 determines the power state of the main power supply 2 and the switch state of the switch unit 332 based on the collected electrical signals.

[0151] Figure 11 and Figure 12In the embodiment, the wireless load addition and subtraction execution module 324 determines the switch state of the switch unit 334 based on the collected electrical signal, the wireless load addition and subtraction execution module 325 determines the switch state of the switch unit 335 based on the collected electrical signal, and the wireless load addition and subtraction execution module 326 determines the switch state of the switch unit 336 based on the collected electrical signal.

[0152] In another embodiment, the main control module may also broadcast a query command to the M wireless load addition and reduction execution modules;

[0153] After receiving the query command, the wireless load addition and subtraction execution module first obtains the electrical signal of the switch unit corresponding to the wireless load addition and subtraction execution module, and then sends the status information to the main control module based on its own device address.

[0154] In the embodiment of the present application, the main control module 31 first generates a query command and then broadcasts the query command. After the wireless load addition and subtraction execution module receives the query command, if it determines that the device address included in the query command matches its own device address, it first obtains the electrical signal of the switch unit corresponding to the wireless load addition and subtraction execution module, then determines the power state and the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signal, and finally sends status information representing the power state and the switch state to the main control module 31 based on its own device address.

[0155] The main control module 31 may store the status information in a corresponding buffer area based on the device address of the wireless load addition and subtraction execution module.

[0156] In a specific implementation, the main control module 31 can generate and broadcast a query command at a preset time interval. After receiving the status information, the main control module 31 replaces the original status information in the cache with the received new status information, so that the main control module 31 can obtain the status of all switch units and power supplies.

[0157] For example, the preset time interval is 5 milliseconds, and the main control module 31 broadcasts a query command to the wireless load addition and subtraction execution module every 5 milliseconds.

[0158] like Figure 13 , which is a schematic diagram of the structure of another main control module provided in an embodiment of the present application, the main control module 31 further includes a first bus port 904, a second bus port 905, an Ethernet port 906, a human-computer interaction interface port 907, a second program download port 908, a second debugging port 909, a second parameter memory 910, a second door dog unit 911 and a second real-time clock unit 912, wherein:

[0159] The second processing unit 902 is electrically connected to the first bus port 804, the second bus port 905, the Ethernet port 906, the human-computer interaction interface port 907, the second program download port 908, the second debugging port 909, the second parameter memory 910, the second dog guard unit 911 and the second real-time clock unit 912 respectively.

[0160] In a specific implementation, the second processing unit 902 can be an embedded processor, using an ARM microcontroller or a microprocessor of similar specifications, with at least 512KB of running memory for running the conversion program, and can flexibly adjust the program files according to changes in customer needs to adapt to different project requirements.

[0161] The Ethernet port 906 may include an RJ45 interface; the first bus port 804 and the second bus port 905 may be two RS485 buses with isolation function, and the RS485 buses can be used by users. The main control module 31 also has a 2MB flash memory and an 8GB SD card.

[0162] In one embodiment, the main control module 31 receives status information sent by M wireless load addition and subtraction execution modules based on the communication timing, specifically, Figure 14 As shown, a schematic diagram of a communication timing provided by an embodiment of the present application is shown. At time T0, the main control module 31 and the wireless load addition and subtraction execution module 321 exchange commands and information; at time T1, the main control module 31 and the wireless load addition and subtraction execution module 322 exchange commands and information; at time T2, the main control module 31 and the wireless load addition and subtraction execution module 323 exchange commands and information; at time Tn-1, the main control module 31 and the wireless load addition and subtraction execution module 32M exchange commands and information.

[0163] For ease of understanding, the present application is described in detail below with reference to specific embodiments.

[0164] Reference Figure 11 , the low voltage distribution system includes two power supplies ( Figure 11 The load switching control device includes a main control module 31 and five wireless load addition and subtraction execution modules. Each wireless load addition and subtraction execution module corresponds to a switch unit. The wireless load addition and subtraction execution modules are distinguished by device addresses:

[0165] The wireless load addition and reduction execution module 321 (device address: 001) corresponds to the switch unit 331;

[0166] The wireless load addition and reduction execution module 322 (device address: 002) corresponds to the switch unit 332;

[0167] The wireless load addition and reduction execution module 324 (device address: 004) corresponds to the switch unit 334, with a priority of 1;

[0168] The wireless load addition and reduction execution module 325 (device address: 005) corresponds to the switch unit 335, priority 2;

[0169] The wireless load addition and reduction execution module 326 (device address: 006) corresponds to the switch unit 336, priority 3;

[0170] Among them, switch unit 331 is between the S1 incoming line and the I section bus, and is used for the conduction of the main power supply 1; switch unit 332 is between the S2 incoming line and the II section bus, and is used for the conduction of the main power supply 2; switch unit 333 is a bus tie circuit breaker, which is used for switching between the two power supplies; switch unit 334, switch unit 335 and switch unit 336 are all connected to the load, and are used to control the conduction of the load.

[0171] In the embodiment of the present application, since the switch units corresponding to the wireless load addition and subtraction execution module 321 and the wireless load addition and subtraction execution module 322 are not connected to the load, the wireless load addition and subtraction execution module 321 and the wireless load addition and subtraction execution module 322 have no priority.

[0172] In addition, priority 1 is higher than priority 2, which is higher than priority 3.

[0173] Figure 11 In the embodiment, after all wireless load addition and subtraction execution modules generate status information based on the collected electrical signals of the corresponding switch units, the main control module 31 receives all status information based on the communication timing. Specifically, at time T0, the main control module 31 receives status information 1 sent by the wireless load addition and subtraction execution module 321, receives status information 2 sent by the wireless load addition and subtraction execution module 322 at time T1, receives status information 3 sent by the wireless load addition and subtraction execution module 324 at time T2, receives status information 4 sent by the wireless load addition and subtraction execution module 325 at time T3, and receives status information 5 sent by the wireless load addition and subtraction execution module 326 at time T4. Based on the five received status information, the main control module 31 determines the switch status of each switch unit and the power status of the two power supplies, as follows:

[0174] Main power supply 1: The power status is normal (status is 1);

[0175] Main power supply 2: The power status is normal (status is 1);

[0176] Switch unit 331: close the switch;

[0177] Switch unit 332: open;

[0178] Switch unit 334: close the switch;

[0179] Switch unit 335: close;

[0180] Switch unit 336: close;

[0181] The control module 31 determines that the switch unit 333 is closed.

[0182] After the control module 31 determines the switch status and power status, it determines that the main power supply 2 is normal, but the switch unit 332 is open. Then the control module 31 sends a control command to control the closing of the switch to the wireless load addition and subtraction execution module 322. After receiving the control command, the wireless load addition and subtraction execution module 322 controls the switch unit 332 to close.

[0183] After the wireless load addition and subtraction execution module 322 controls the switch unit 332 to be closed, the main control module 31 controls the switch unit 333 to be opened.

[0184] After the main control module 31 receives the status information again, it analyzes and determines that the main power supply 2 (status 0) is abnormal. The main control module 31 outputs the load reduction control command according to the preset switching logic program (when the main power supply 2 is abnormal, it outputs the load reduction control command according to the priority from high to low, and when the main power supply 1 is switched, it outputs the load control command in sequence according to the priority from low to high. The control commands are output to the wireless load addition and subtraction execution modules connected to the load in sequence, as follows:

[0185] Sending a load reduction control command to the wireless load addition and reduction execution module 325. After receiving the load reduction control command, the wireless load addition and reduction execution module 325 controls the switch unit 326 to be disconnected based on the load reduction control command;

[0186] Sending a load reduction control command to the wireless load addition and reduction execution module 326. After receiving the load reduction control command, the wireless load addition and reduction execution module 326 controls the switch unit 325 to be disconnected based on the load reduction control command;

[0187] Sending a disconnection control command to the wireless load addition and subtraction execution module 322. After receiving the disconnection control command, the wireless load addition and subtraction execution module 322 controls the switch unit 332 to open.

[0188] The main control module 31 controls the switch unit 333 to close;

[0189] After the main control module 31 controls the switch unit 333 to close, the power supply is switched to the main power supply 1. After the power supply is switched to the main power supply 1, the main control module 31 controls the connection of loads 2 and 3. The main control module 31 outputs loading control commands to the wireless load addition and subtraction execution module 325 and the wireless load addition and subtraction execution module 326 based on the priority from low to high. The specific details are as follows:

[0190] Sending a loading control command to the wireless loading and unloading execution module 336. After receiving the loading control command, the wireless loading and unloading execution module 336 controls the switch unit 326 to be turned on based on the loading control command.

[0191] A loading control command is sent to the wireless loading and unloading execution module 325 . After receiving the loading control command, the wireless loading and unloading execution module 325 controls the switch unit 335 to be turned on based on the loading control command.

[0192] The wireless load-on / load-off execution module in the load switching control device in the embodiment of the present application is a universal module. The wireless load-on / load-off execution module receives and parses the control commands (remote control loading signal of the circuit breaker, remote control load-off signal of the circuit breaker) sent by the main control module through a wireless connection, and drives the relay output in the wireless load-on / load-off execution module to execute the action, thereby controlling the circuit breaker to perform closing and opening operations.

[0193] The main control module in the load switching control device receives status information sent by the wireless load addition and subtraction execution module through communication, and issues control commands to the wireless load addition and subtraction execution module. The main control module performs logical processing based on the sampling results of multiple received signals and issues control commands to the wireless load addition and subtraction execution module according to the compiled conversion process.

[0194] Based on the same inventive concept, an embodiment of the present application also provides a load switching control method. The principle of the load switching control method for solving technical problems is similar to the principle of the above-mentioned load switching control device. The implementation of the load switching control method can refer to the implementation of the load switching control device, and the repeated parts will not be repeated.

[0195] like Figure 15 FIG. 1 is a flow chart of a load switching method provided in an embodiment of the present application, which specifically includes the following steps:

[0196] S1501: Collecting, by means of a wireless load addition and subtraction execution module, an electrical signal from a switch unit corresponding to the wireless load addition and subtraction execution module, determining a power supply state and a switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signal, and sending state information representing the power supply state and the switch state to the main control module;

[0197] S1502: The main control module generates a control command corresponding to the wireless load addition and subtraction execution module based on the received status information sent by the wireless load addition and subtraction execution module; and sends the control command to each wireless load addition and subtraction execution module based on the load priority level;

[0198] S1503: After receiving the control command sent by the main control module through the wireless load addition and subtraction execution module, the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module is controlled.

[0199] In an optional embodiment, the method further includes:

[0200] Broadcasting a query command to the M wireless load addition and reduction execution modules through the main control module;

[0201] After receiving the query command through the wireless load addition and subtraction execution module, an electrical signal of a switch unit corresponding to the wireless load addition and subtraction execution module is acquired;

[0202] The method further comprises:

[0203] The wireless load addition and reduction execution module sends the status information to the main control module based on its own device address.

[0204] The present application provides a load switching control device and method, which are applied to a low-voltage power distribution system. The load switching control device includes a main control module and M wireless load addition and subtraction execution modules, where M is a positive integer. The main control module is connected to the M wireless load addition and subtraction execution modules via a wireless network. The wireless load addition and subtraction execution modules collect electrical signals from corresponding switch units and send status information representing power supply status and switch status to the main control module. The main control module generates control commands for the corresponding wireless load addition and subtraction execution modules based on the received status information, and sends control commands to each wireless load addition and subtraction execution module based on the load priority. After receiving the control commands, the wireless load addition and subtraction execution modules control the switch status of the corresponding switch units. Since the load switching control device provided in the embodiment of the present application includes a wireless load addition and subtraction execution module and a main control module, the main control module runs the switching logic program, and the wireless load addition and subtraction execution module drives the switch unit based on the control command sent by the main control module, thereby simplifying the operating program in the main control module, and the main control module does not need to process a large number of control signals. Since the main control module does not need to be connected to the switch unit, it can be adapted to different projects, thereby improving the applicability of the load switching control device. In addition, the main control module and the wireless load addition and subtraction execution module are connected via a wireless network, thereby simplifying wiring and reducing the difficulty of installation and maintenance.

[0205] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0206] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0207] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0208] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0209] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A load switching control device, characterized in that: Applied to a low-voltage power distribution system, the load switching control device includes a main control module and M wireless load addition and subtraction execution modules, wherein the main control module and the M wireless load addition and subtraction execution modules are connected via a wireless network, and M is a positive integer; The wireless load addition and subtraction execution module is configured to collect electrical signals from the switch unit corresponding to the wireless load addition and subtraction execution module, determine a power supply state and a switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signals, and send status information representing the power supply state and the switch state to the main control module; and upon receiving a control command sent by the main control module, control the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module; The main control module is configured to generate a control command corresponding to the wireless load addition and subtraction execution module based on the received status information sent by the wireless load addition and subtraction execution module; and send the control command to each wireless load addition and subtraction execution module based on the load priority level.

2. The device according to claim 1, characterized in that The main control module is also used for: Broadcasting a query command to the M wireless load addition and reduction execution modules; The wireless load addition and reduction execution module is further used for: After receiving the query command, obtaining an electrical signal of a switch unit corresponding to the wireless load addition and subtraction execution module; The wireless load addition and reduction execution module is specifically used for: The status information is sent to the main control module based on its own device address.

3. The device according to claim 1, characterized in that The wireless load addition and reduction execution module includes: a collection unit configured to, after collecting an electrical signal from a switch unit corresponding to the wireless load addition and subtraction execution module, isolate the electrical signal and transmit the processed electrical signal; a first processing unit, configured to determine a power state and a switch state of a switch unit corresponding to the wireless load addition and subtraction execution module based on the processed electrical signal, generate the state information, and, upon receiving the control command, convert the control command into a control signal, and output the control signal to a first output unit; The first output unit is configured to control a switching state of a switch unit corresponding to the wireless load addition and subtraction execution module based on the control signal; The first wireless transceiver unit is configured to send the status information to the main control module, receive a control command sent by the main control module, and send the control command to the first processing unit.

4. The device according to claim 3, characterized in that The first wireless transceiver unit includes a first inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first wireless LoRa chip, a first diode and a first transistor; The voltage input end of the first wireless loRa chip is electrically connected to the first end of the first inductor, the first end of the first capacitor, the first end of the second capacitor, and the first end of the third capacitor. The fifth input pin of the first wireless loRa chip is electrically connected to the first end of the first resistor, the first end of the second resistor, and the first end of the fourth capacitor. The sleep request end of the first wireless loRa chip is electrically connected to the first end of the third resistor for receiving a sleep request signal. The state control end of the first wireless loRa chip is electrically connected to the first end of the fourth resistor. The receiving end of the first wireless loRa chip is used to receive the control command, and the transmitting end of the first wireless loRa chip is used to send the status information; The second end of the fourth resistor is electrically connected to the first end of the fifth resistor and the control end of the first transistor; The first end of the first transistor and the second end of the fifth resistor are both electrically connected to the ground end, and the second end of the first transistor is electrically connected to the cathode of the first diode; The anode of the first diode is electrically connected to the first end of the sixth resistor; The second end of the first inductor, the second end of the third resistor, and the second end of the sixth resistor are all used to receive a first input voltage; The second end of the first resistor is used to receive a second input voltage; The second end of the first capacitor, the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, and the second end of the second resistor are all electrically connected to the ground end.

5. The device according to claim 4, characterized in that The acquisition unit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second diode, a third diode, a fifth capacitor, a sixth capacitor and a photoelectric coupler; A first end of the seventh resistor is electrically connected to one end of the switch unit for collecting the electrical signal, and a second end of the seventh resistor is electrically connected to the first end of the eighth resistor, the cathode of the second diode, the first end of the fifth capacitor, and the first end of the photoelectric coupler; The second end of the eighth resistor, the anode of the second diode, the second end of the fifth capacitor, and the second end of the photoelectric coupler are all electrically connected to the ground end; The third end of the photoelectric coupler is electrically connected to the first end of the ninth resistor, the cathode of the third diode, and the first end of the sixth capacitor, for transmitting the processed electrical signal, and the fourth end of the photoelectric coupler and the second end of the sixth capacitor are both electrically connected to the ground end; The first end of the tenth resistor is electrically connected to the anode of the third diode; The second end of the ninth resistor and the second end of the tenth resistor are used to receive the third input voltage.

6. The device according to claim 5, characterized in that The first output unit includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourth diode, a fifth diode, a seventh capacitor, a second transistor and a first relay; A first end of the coil of the first relay is electrically connected to the anode of the fifth diode, the cathode of the fourth diode, and the first end of the second transistor; a second end of the coil of the first relay is electrically connected to the cathode of the fifth diode and the first end of the eleventh resistor, for receiving a fourth input voltage; a normally open contact of the first relay and a common end of the first relay are electrically connected to a control circuit of the switch unit; The second end of the eleventh resistor is electrically connected to the anode of the fourth diode; The control end of the second transistor is electrically connected to the first end of the twelfth resistor, the first end of the thirteenth resistor, and the first end of the seventh capacitor, and the second end of the second transistor, the second end of the thirteenth resistor, and the second end of the seventh capacitor are all electrically connected to the ground end; The second end of the twelfth resistor is used to input the control command.

7. The device according to claim 3, characterized in that The wireless load addition and reduction execution module also includes a first parameter memory, a first watchdog unit, a first real-time clock unit, a switch input unit, a first program download port and a first debugging port; The first parameter memory, the first watchdog unit, the first real-time clock unit, the switch input unit, the first program download port and the first debugging port are all electrically connected to the first processing unit.

8. The device according to claim 1, characterized in that The main control module includes: a second wireless transceiver unit, configured to receive the status information sent by the wireless load addition and reduction execution module, and send the status information to the second processing unit; and send the received control command to the wireless load addition and reduction execution module; The second processing unit is configured to generate a control command corresponding to the wireless addition and subtraction execution module based on the received status information; generate a control command corresponding to each wireless addition and subtraction execution module based on the load priority level, and send the generated control command to the second wireless transceiver unit.

9. The device according to claim 8, characterized in that The main control module also includes a second output unit; The second output unit is electrically connected to the second processing unit; The second output unit is used to control the switch state of the switch unit connected to the main control module based on the received state information.

10. A load switching control method, characterized in that: Applied to the load switching control device according to any one of claims 1 to 9, the method comprises: collecting, by the wireless load addition and subtraction execution module, an electrical signal of a switch unit corresponding to the wireless load addition and subtraction execution module, determining a power supply state and a switch state of the switch unit corresponding to the wireless load addition and subtraction execution module based on the electrical signal, and sending state information representing the power supply state and the switch state to the main control module; The main control module generates a control command corresponding to the wireless load addition and subtraction execution module based on the received status information sent by the wireless load addition and subtraction execution module; and sends the control command to each wireless load addition and subtraction execution module based on the load priority level; After receiving the control command sent by the main control module through the wireless load addition and subtraction execution module, the switch state of the switch unit corresponding to the wireless load addition and subtraction execution module is controlled.

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