Distributed power supply access wireless switching terminal

Abstract

The utility model discloses a distributed power supply access wireless switching terminal which comprises a distributed power supply access module and a wireless switching module which are arranged on a shell body, the distributed power supply access module is installed on a user side and used for being in communication connection with a master station, and the wireless switching module is installed on an inverter side and used for being in communication connection with an inverter. The distributed power supply access module and the wireless switching module are in wireless communication connection through the LoRa module; according to the utility model, a wireless communication link between the user side and the inverter side is constructed by adopting the LoRa module, wireless reliable communication between the user side and the inverter side is realized by utilizing the characteristics of long distance, low cost, strong anti-interference capability and the like of LoRa communication, and the user side and the inverter side do not depend on wired communication any more; therefore, the distributed layout mode of the inverter side is more flexible, the method can be well suitable for new energy scenes such as roof photovoltaic and mobile energy storage, and the maintenance cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of distributed energy control, in particular to a distributed power supply access wireless switching terminal. Background Art

[0002] Distributed energy control technology is primarily used in the energy management field. Its core principle is to achieve centralized monitoring and coordinated control of distributed energy systems (such as photovoltaics, energy storage, and wind power) through intelligent devices. In distributed energy systems, energy production and consumption are decentralized, and various energy devices (such as inverters, energy storage batteries, and load controllers) must cooperate to achieve efficient energy utilization and stable supply. Traditional distributed energy control relies primarily on wired communication technologies such as RS485 and CAN bus. These technologies connect devices through physical cables, transmitting operating parameters of devices such as inverters to the user-side master station, thereby enabling monitoring and control of the entire system.

[0003] However, existing distributed power systems suffer from numerous drawbacks. First, lack of compatibility is a major drawback. A single protocol struggles to support the coordinated operation of multiple energy devices, resulting in ineffective communication and coordination between different devices. Second, communication is limited to wired connections, and cable lengths severely restrict the flexibility of device layout. This constrains the installation locations of devices like inverters, making it difficult to adapt to complex and diverse energy application scenarios, such as rooftop photovoltaics and mobile energy storage. Furthermore, wired communication carries high maintenance costs, making line troubleshooting and repair cumbersome. Furthermore, installation flexibility is limited, and fixed structures cannot meet the needs of diverse energy scenarios.

[0004] Therefore, a distributed power supply access wireless transfer terminal is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a distributed power supply access wireless transfer terminal to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a distributed power access wireless transfer terminal, comprising a distributed power access module and a wireless transfer module arranged on a shell body, wherein the distributed power access module is installed on the user side for communicating with the master station, and the wireless transfer module is installed on the inverter side for communicating with the inverter, and the distributed power access module and the wireless transfer module are wirelessly connected via a LoRa module, and are used to collect the working parameters of the inverter side through LoRa communication and upload them to the master station.

[0007] Preferably, the distributed power supply access module includes a first power supply module, a first control module, a dual-mode module and a first LoRa module. The first control module, the dual-mode module and the first LoRa module are all electrically connected to the first power supply module. The dual-mode module and the first LoRa module are also electrically connected to the first control module. The dual-mode module is used to communicate with the master station via a power carrier communication method or a 4G communication method.

[0008] Preferably, the wireless switching module includes a second control module, a second power module, a 485 communication module and a second LoRa module. The second control module, the 485 communication module and the second LoRa module are all electrically connected to the second power module. The 485 communication module and the second LoRa module are both electrically connected to the second control module. The 485 communication module is respectively connected to the inverter and the 4G stick through two 485 communication circuits.

[0009] Preferably, the second power supply module includes a first power supply circuit and a second power supply circuit, the first power supply circuit is used to power the second control module and the 485 communication module, and the second power supply circuit is used to power the second LoRa module.

[0010] Preferably, the first power supply circuit and the second power supply circuit are arranged in upper and lower layers for isolation on a PCB board.

[0011] Preferably, the second power supply circuit includes a power chip U1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and an inductor L1. The power end of the power chip U1 is respectively connected to the first end of the resistor R1, the first end of the capacitor C5, and the inverter. The second end of the resistor R1 is respectively connected to the enable end of the power chip U1, the first end of the resistor R4, and the first end of the capacitor C6. The second ends of the capacitor C5, the resistor R4, the capacitor C6, and the resistor R3 are all connected to the The first end of the capacitor C1 is connected to the boost end of the power chip U1, and the second end is connected to the switch control end of the power chip U1. The first end of the inductor L1 is connected to the switch control end of the power chip U1. The first end of the resistor R3, the first end of the resistor R2, and the first end of the capacitor C7 are all connected to the feedback end of the power chip U1. The second end of the resistor R2, the second end of the capacitor C7, the first end of the capacitor C2, the first end of the capacitor C3, and the first end of the capacitor C4 are all connected to the second end of the inductor L1. The second end of the inductor L1 is also connected to the second LoRa module.

[0012] Preferably, the capacitor C5 , the capacitor C6 , the capacitor C2 , the capacitor C3 , and the capacitor C4 are disposed on the circuit board close to the power chip U1 .

[0013] Preferably, the radio frequency interface of the second LoRa module is The filter circuit is connected to the antenna.

[0014] Preferably, the The filter circuit includes an inductor L2, a capacitor C14, a capacitor C15, a resistor R5 and a TVS tube. The first end of the inductor L2 is connected to the antenna end of the LoRa chip M1, the second end of the inductor L2 is respectively connected to the first end of the resistor R5 and the first end of the capacitor C15, the second end of the resistor R5 is respectively connected to the first end of the capacitor C15, the first end of the TVS tube and the antenna, the second end of the capacitor C14, the second end of the capacitor C15 and the second end of the TVS tube are grounded.

[0015] Preferably, the front and rear ends of the shell body are respectively connected with a main joint and a slave joint, the outer side wall of the main joint is relatively connected with an elastic block, and the outer side wall of the slave joint is relatively provided with a slot, and the elastic block and the slot are elastically connected to each other.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The wireless transfer terminal of the utility model is suitable for distributed energy systems. It builds a wireless communication link between the user side and the inverter side through the LoRa module. It uses the long distance, low cost, and strong anti-interference ability of LoRa communication to achieve wireless and reliable communication between the user side and the inverter side. The user side and the inverter side no longer rely on wired communication, making the distributed layout of the inverter side more flexible. It can be well applied to new energy scenarios such as rooftop photovoltaics and mobile energy storage, and has low maintenance costs.

[0018] 2. The utility model provides a main joint and a slave joint at the front and rear access ends of the shell body, as well as corresponding elastic blocks and slots. During installation, the elastic blocks on the main joint are inserted into the corresponding slots to achieve quick installation and disassembly, and the installation operation is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation of the wireless adapter module of the present utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the module structure of a wireless transfer terminal applicable to a distributed energy system according to a preferred embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the module structure of the distributed power access module of the preferred embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the module structure of the wireless switching module of the preferred embodiment of the present application;

[0024] Figure 6 1 is a schematic diagram of the circuit principle of the second power supply circuit of the preferred embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the circuit principle of the second LoRa module of the preferred embodiment of the present application.

[0026] Figure 8 It is a side schematic diagram of a distributed power supply access module of a preferred embodiment of the present application.

[0027] Figure 9 It is a top view schematic diagram of a distributed power supply access module of a preferred embodiment of the present application.

[0028] Figure 10 It is an isometric diagram of a distributed power supply access module of a preferred embodiment of the present application.

[0029] In the figure: 1. Shell body; 2. Distributed power access module; 201. Dual-mode module; 202. First LoRa module; 203. First control module; 204. First power module; 3. Wireless adapter module; 4. Master connector; 5. Slave connector; 6. Elastic card block; 7. Card slot. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-9 The utility model provides a technical solution: a distributed power access wireless transfer terminal, including a distributed power access module 2 and a wireless transfer module 3 arranged on a shell body 1, the distributed power access module 2 and the wireless transfer module 3 are both fixed on the shell body 1, and the shell body 1 is used to assemble the distributed power access module 2 and the wireless transfer module 3, the distributed power access module 2 is installed on the user side, and is used to communicate with the master station, and the wireless transfer module 3 is installed on the inverter side, and is used to communicate with the inverter, and the distributed power access module 2 and the wireless transfer module 3 are connected by wireless communication through the LoRa module, and are used to collect the working parameters of the inverter side through LoRa communication and upload them to the master station.

[0032] Among them, when the master station needs to collect the working parameters of multiple inverters arranged in a distributed manner, the master station will send a collection instruction to the user side. After obtaining the collection instruction, the distributed power access module 2 on the user side will wirelessly transmit the collection instruction to the LoRa module on the inverter side through the LoRa module. The LoRa module on the inverter side will transmit the collection instruction to the inverter. After receiving the instruction, the inverter will transmit its own working parameter data to the LoRa module on the inverter side. The LoRa module on the inverter side will then wirelessly transmit the inverter's working parameter data to the LoRa module on the user side. After receiving the data, the distributed power access module 2 will transmit it to the master station through the uplink channel.

[0033] like Figure 4 As shown, the distributed power access module 2 includes a first power module 204, a first control module 203, a dual-mode module 201, and a first LoRa module 202. The first control module 203, the dual-mode module 201, and the first LoRa module 202 are all electrically connected to the first power module 204. The dual-mode module 201 and the first LoRa module 202 are also electrically connected to the first control module 203. The dual-mode module 201 is used to communicate with the master station via power carrier communication or 4G communication. The first power module 204 is connected to the smart meter on the user side, and the smart meter provides power to the first power module 204. In addition, the distributed power access module 2 also includes a 485 communication module to retain the existing 485 wired communication function, thereby being compatible with 485 wired communication and LoRa wireless communication.

[0034] like Figure 5 As shown, the wireless adapter module 3 includes a second control module, a second power module, a 485 communication module, and a second LoRa module. The second control module, the 485 communication module, and the second LoRa module are all electrically connected to the second power module. The 485 communication module and the second LoRa module are both electrically connected to the second control module. The 485 communication module is connected to the inverter and the 4G stick respectively through two 485 communication circuits. The second power module is connected to the inverter, and the inverter provides power to the second power module.

[0035] The communication process of data collection is as follows: the master station transmits the collection instruction to the dual-mode module 201 through power carrier communication or 4G communication. After receiving the collection instruction, the dual-mode module 201 transmits it to the first control module 203. The first control module 203 controls the wireless transmitting module of the first LoRa module 202 to send the collection instruction. After receiving the collection instruction, the wireless receiving module of the second LoRa module transmits it to the second control module. The second control module controls the 485 communication module to transmit the collection instruction to the 485 communication interface of the inverter. After receiving the instruction, the inverter transmits its own operating parameter data to the 485 communication module through the 485 communication interface. The 485 communication module transmits the data to the second control module. The second control module then sends the data to the wireless receiving module of the first LoRa module 202 through the wireless transmitting module of the second LoRa module. The first LoRa module 202 then transmits the data to the first control module 203. The first control module 203 transmits the data to the master station through the dual-mode module 201. The first control module 203 and the second control module both use MCUs and support conversion between different types of communication protocols.

[0036] The second power module includes a first power circuit and a second power circuit. The first power circuit is used to power the second control module and the 485 communication module, and the second power circuit is used to power the second LoRa module. The first power circuit uses an LDO power supply method, and the second power circuit uses a DC-DC power supply method to meet the stable high current output requirements of the LoRa module.

[0037] The first power supply circuit and the second power supply circuit are arranged in upper and lower layers on the PCB board for isolation, thereby achieving physical isolation between the two power supply circuits and reducing mutual interference.

[0038] like Figure 6As shown, the second power supply circuit includes a power supply chip U1, related capacitors, resistors, inductors and other components, and its specific connection method is as follows: the power supply end of the power supply chip U1 is respectively connected to the first end of the resistor R1, the first end of the capacitor C5 and the inverter, the second end of the resistor R1 is respectively connected to the enable end of the power supply chip U1, the first end of the resistor R4 and the first end of the capacitor C6, the second ends of the capacitor C5, the resistor R4, the capacitor C6 and the resistor R3 are all grounded, the first end of the capacitor C1 is connected to the boost end of the power supply chip U1, and the second end is connected to the switch control end of the power supply chip U1, the first end of the inductor L1 is connected to the switch control end of the power supply chip U1, the first end of the resistor R3, the first end of the resistor R2, and the first end of the capacitor C7 are all connected to the feedback end of the power supply chip U1, the second end of the resistor R2, the second end of the capacitor C7, the first end of the capacitor C2, the first end of the capacitor C3 and the first end of the capacitor C4 are all connected to the second end of the inductor L1, and the second end of the inductor L1 is also connected to the second LoRa module. Among them, capacitor C5, capacitor C6, capacitor C2, capacitor C3 and capacitor C4 are arranged on the circuit board close to the power chip U1 to reduce parasitic capacitance and suppress power ripple.

[0039] like Figure 7 As shown, the RF interface of the second LoRa module is connected via The filter circuit is connected to the antenna. The filter circuit includes an inductor L2, a capacitor C14, a capacitor C15, a resistor R5 and a TVS tube. The first end of the inductor L2 is connected to the antenna terminal of the LoRa chip M1. The second end of the inductor L2 is connected to one end of the resistor R5 and the first end of the capacitor C15 respectively. The second end of the resistor R5 is connected to the first end of the capacitor C15, the first end of the TVS tube and the antenna respectively. The second end of the capacitor C14, the second end of the capacitor C15 and the second end of the TVS tube are grounded. In terms of circuit layout, The filter circuit is placed close to the LoRa chip M1, and the GND signals of capacitors C14 and C15 need to be connected to the LoRa chip M1 separately to make the loop as short as possible.

[0040] like Figure 1 and Figure 2 As shown, the front and rear ends of the shell body 1 are respectively connected to the main joint 4 and the slave joint 5, the outer side wall of the main joint 4 is relatively connected to the elastic block 6, and the outer side wall of the slave joint 5 is relatively provided with a card slot 7, and the elastic block 6 and the card slot 7 are elastically connected to each other. The mutual cooperation between the elastic block 6 and the card slot 7 facilitates the rapid installation of the equipment during actual installation.

[0041] The implementation principle of this utility model is as follows:

[0042] The distributed power access module 2 is installed on the user side and is responsible for communicating with the master station, while the wireless adapter module 3 is installed on the inverter side and communicates with the inverter. The wireless communication connection between the two is realized through the LoRa module. Specifically, when the master station needs to collect the working parameters of the inverter, it will send a collection instruction to the distributed power access module 2 on the user side. The module transmits the instruction wirelessly to the wireless adapter module 3 on the inverter side through its internal first LoRa module 202. After receiving the instruction, the wireless adapter module 3 uses its 485 communication module to interact with the communication interface of the inverter to obtain the working parameters of the inverter. Subsequently, these parameter data are sent back to the distributed power access module 2 through the second LoRa module of the wireless adapter module 3. The power access module 2 is finally uploaded to the master station by the distributed power access module 2. In terms of hardware design, the distributed power access module 2 includes a first power module 204, a first control module 203, a dual-mode module 201 and a first LoRa module 202. The dual-mode module 201 supports power carrier communication and 4G communication to ensure reliable connection with the master station. The wireless adapter module 3 includes a second control module, a second power module, a 485 communication module and a second LoRa module. The second power module adopts a layered isolation design to supply power to the control module, the 485 communication module and the LoRa module respectively to meet the power supply requirements of different modules and reduce mutual interference. In addition, the LoRa module of the wireless adapter module 3 adopts A type filtering circuit is connected to the antenna to filter out high-frequency noise and interference, improving the stability and accuracy of communication. Through this modular design and the application of wireless communication technology, this solution not only improves the compatibility and communication flexibility of distributed energy systems, but also reduces maintenance costs. It is particularly suitable for new energy scenarios such as rooftop photovoltaics and mobile energy storage.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the spirit and scope of the present invention.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distributed power supply access wireless transfer terminal, characterized in that: The invention comprises a distributed power access module (2) and a wireless transfer module (3) arranged on a housing body (1), wherein the distributed power access module (2) is installed on the user side and is used for communication connection with a master station, and the wireless transfer module (3) is installed on the inverter side and is used for communication connection with the inverter, and the distributed power access module (2) and the wireless transfer module (3) are wirelessly connected via a LoRa module, and are used for collecting working parameters on the inverter side by means of LoRa communication and uploading them to the master station.

2. The distributed power supply access wireless transfer terminal according to claim 1, characterized in that: The distributed power access module (2) comprises a first power module (204), a first control module (203), a dual-mode module (201) and a first LoRa module (202); the first control module (203), the dual-mode module (201) and the first LoRa module (202) are all electrically connected to the first power module (204); the dual-mode module (201) and the first LoRa module (202) are also electrically connected to the first control module (203); and the dual-mode module (201) is used for communication connection with a master station via a power carrier communication mode or a 4G communication mode.

3. The distributed power supply access wireless transfer terminal according to claim 1, characterized in that: The wireless switching module (3) includes a second control module, a second power module, a 485 communication module and a second LoRa module. The second control module, the 485 communication module and the second LoRa module are all electrically connected to the second power module. The 485 communication module and the second LoRa module are both electrically connected to the second control module. The 485 communication module is connected to the inverter and the 4G stick respectively through two 485 communication circuits.

4. The distributed power supply access wireless transfer terminal according to claim 3, characterized in that: The second power supply module includes a first power supply circuit and a second power supply circuit. The first power supply circuit is used to supply power to the second control module and the 485 communication module, and the second power supply circuit is used to supply power to the second LoRa module.

5. The distributed power supply access wireless transfer terminal according to claim 4, characterized in that: The first power supply circuit and the second power supply circuit are arranged in upper and lower layers for isolation on the PCB board.

6. The distributed power supply access wireless transfer terminal according to claim 4, characterized in that: The second power supply circuit includes a power chip U1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and an inductor L1. The power end of the power chip U1 is respectively connected to the first end of the resistor R1, the first end of the capacitor C5, and the inverter. The second end of the resistor R1 is respectively connected to the enable end of the power chip U1, the first end of the resistor R4, and the first end of the capacitor C6. The second ends of the capacitor C5, the resistor R4, the capacitor C6, and the resistor R3 are all grounded. The first end of capacitor C1 is connected to the boost end of the power chip U1, and the second end is connected to the switch control end of the power chip U1. The first end of inductor L1 is connected to the switch control end of the power chip U1. The first end of resistor R3, the first end of resistor R2, and the first end of capacitor C7 are all connected to the feedback end of the power chip U1. The second end of resistor R2, the second end of capacitor C7, the first end of capacitor C2, the first end of capacitor C3, and the first end of capacitor C4 are all connected to the second end of inductor L1. The second end of inductor L1 is also connected to the second LoRa module.

7. The distributed power supply access wireless transfer terminal according to claim 6, characterized in that: Capacitor C5 , capacitor C6 , capacitor C2 , capacitor C3 , and capacitor C4 are disposed on the circuit board close to the power chip U1 .

8. The distributed power supply access wireless transfer terminal according to claim 3, characterized in that: The radio frequency interface of the second LoRa module is connected via The filter circuit is connected to the antenna.

9. The distributed power supply access wireless transfer terminal according to claim 8, characterized in that: described The filter circuit includes an inductor L2, a capacitor C14, a capacitor C15, a resistor R5 and a TVS tube. The first end of the inductor L2 is connected to the antenna end of the LoRa chip M1, the second end of the inductor L2 is respectively connected to the first end of the resistor R5 and the first end of the capacitor C15, the second end of the resistor R5 is respectively connected to the first end of the capacitor C15, the first end of the TVS tube and the antenna, the second end of the capacitor C14, the second end of the capacitor C15 and the second end of the TVS tube are grounded.

10. The distributed power supply access wireless transfer terminal according to any one of claims 1 to 9, characterized in that: The front and rear ends of the housing body (1) are respectively connected to a main joint (4) and a slave joint (5); the outer side wall of the main joint (4) is relatively connected to an elastic clamping block (6); the outer side wall of the slave joint (5) is relatively provided with a clamping groove (7); the elastic clamping block (6) and the clamping groove (7) are elastically clamped to each other.

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