Wireless communication extension module of transformer area intelligent fusion terminal

Abstract

The utility model belongs to the technical field of electric power wireless communication, and particularly relates to a wireless communication expansion module of a transformer area intelligent fusion terminal. The utility model provides a wireless communication expansion module of an intelligent fusion terminal, which is designed based on an expansion module interface reserved by the intelligent fusion terminal in a transformer area, comprises an MCU (Microprogrammed Control Unit) controller, a power supply module, a radio frequency module, an antenna interface and a main control board interface, and is used for expanding an independent wireless channel of the intelligent fusion terminal in the transformer area and constructing a wireless network. And the communication efficiency with various access devices in the range of the low-voltage distribution area is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power wireless communication, in particular to a wireless communication expansion module of an intelligent fusion terminal in a substation area. Background Art

[0002] In the context of a new power system dominated by new energy, based on the edge computing capabilities of the intelligent fusion terminal in the substation, data collection, access, operation monitoring and coordinated control are carried out for the source, network, load and storage equipment distributed within the low-voltage distribution network substation. Through the deep integration of source, network, load and storage, the requirements of the distribution substation for optimizing the energy environment and improving the quality of electric energy can be met, and the flexible consumption and intelligent operation control of distributed power sources can be realized, the level of Internet of Things, digitization and intelligence of the distribution network can be promoted, and the carrying capacity of the distribution network can be improved.

[0003] The collection, access and collaborative control of distributed photovoltaic, energy storage, charging piles, controllable loads and other equipment in the low-voltage substation area all rely on reliable communication technology. As the edge computing terminal of the distribution substation area, the local communication technology solution currently used is mainly HPLC carrier communication. Carrier communication technology belongs to the physical layer shared power line technology, which is easily affected by line length and strong electric signal interference, resulting in reduced communication reliability or even failure of communication.

[0004] The existing local wireless communication technology solutions for the intelligent fusion terminal in the substation area are all upgraded and reconstructed on the local communication module slot interface, using a wireless communication module to replace the original carrier communication module in the slot, or adding a wireless hardware module to the carrier communication module hardware, and using a TTL serial port to connect to the main control board of the intelligent fusion terminal in the substation area. The wireless module and the carrier module share a serial port as the access control interface of the main control board, and the two communication channels cannot be used independently at the same time. The carrier communication module on the local communication module slot needs to carry the collection business of all carrier communication devices in the entire substation area, and the access of new wireless devices will affect the original business. Therefore, it is very necessary to adopt an independent channel wireless communication solution as a supplement to carrier communication. Utility Model Content

[0005] The purpose of the utility model is to provide a wireless communication expansion module for an intelligent fusion terminal in an area, which is used for expanding independent wireless channels of the intelligent fusion terminal in the area, building a wireless network, and improving the communication efficiency with various access devices within the low-voltage distribution area.

[0006] Specifically, a wireless communication expansion module of a station area intelligent fusion terminal is designed based on the expansion module interface reserved by the station area intelligent fusion terminal, including an MCU controller, a power module, a radio frequency module, an antenna interface and a main control board interface, wherein:

[0007] The wireless communication extension module is connected to the intelligent fusion terminal of the substation through the main control board interface;

[0008] The MCU controller is connected to the main control board interface and the RF module for transmission control and processing of communication data;

[0009] The antenna interface is connected to the radio frequency module and is used to communicate and transmit data with the acquisition access terminal device;

[0010] The power module is respectively connected to the MCU controller, the radio frequency module, the antenna interface, and the main control board interface to provide electrical energy.

[0011] Furthermore, the MCU controller communicates with the intelligent fusion terminal of the substation via a USB interface in the main control board interface.

[0012] Furthermore, the MCU controller is connected to the radio frequency module via a serial port, configures and manages the radio frequency module, and realizes the wireless data transmission function.

[0013] Furthermore, the RF module is selected to support MESH wireless self-organizing network and automatic relay functions, and the module integrates a wireless communication transceiver power unit and a networking management unit.

[0014] Furthermore, the RF module hardware design can support the adaptation of various RF modules through the selective welding of resistor elements.

[0015] Furthermore, the radio frequency module is welded on the bottom plate by means of stamp holes.

[0016] Furthermore, the power module directly takes DC 5V from the USB interface as power supply.

[0017] Furthermore, the power module uses a power chip to monitor voltage fluctuations. Abnormal voltage fluctuations can trigger the power module to reset, and the 5V to 3.3V power chip is used to power other 3.3V chips in the board.

[0018] Furthermore, an LED is provided to indicate the operation status and the data receiving / sending status of the wireless module.

[0019] The beneficial effects of the utility model are as follows:

[0020] This application can expand an independent wireless channel by installing and inserting a wireless communication expansion module on the reserved interface of the intelligent fusion terminal in the substation area. It no longer shares a serial port with the carrier module as the access control interface of the main control board. There is no resource competition with the local communication module interface and there is no impact on the original business. The two can be used independently at the same time to improve the communication efficiency with various access devices within the low-voltage distribution station area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the hardware block diagram of the wireless communication expansion module;

[0022] Figure 2 This is the hardware signal connection diagram of the wireless communication expansion module;

[0023] Figure 3 This is the pin assignment diagram of the connector between the wireless communication expansion module and the main control board;

[0024] Figure 4 This is a schematic diagram of the communication network composed of wireless extension modules of the intelligent fusion terminal in the substation area;

[0025] Figure 5 MCU pin assignment diagram;

[0026] Figure 6 This is the power monitoring circuit diagram;

[0027] Figure 7 For RF module circuit Figure 1 ;

[0028] Figure 8 For RF module circuit Figure 2 ;

[0029] Fig. 9 This is the schematic diagram of the connection terminals between the wireless communication expansion module and the main control board. DETAILED DESCRIPTION

[0030] The present application is described in further detail below.

[0031] A wireless communication expansion module for a station area intelligent fusion terminal is designed based on the expansion module interface reserved by the station area intelligent fusion terminal, and is mainly composed of an MCU controller, a power module, a USB interface, a radio frequency module, an LED indicator, a debugging serial port, a JTAG debugging port, an antenna interface, and a main control board interface hardware part, such as Figure 1 The hardware signal connection is as shown. Figure 2 shown.

[0032] The MCU controller uses the V8411N chip with Cotex-M4 core, which is responsible for module management of all hardware resources of the entire wireless communication expansion module. The pin assignment is as follows: Figure 3 As shown. The MCU controller is connected to the intelligent fusion terminal of the substation via USB, and the wireless RF module is configured and networked through the serial port, thereby realizing the wireless data transmission function of the intelligent fusion terminal of the substation. The JTAG debugging port is used for MCU to connect to the emulator for development debugging and FLASH burning. The debugging serial port is used to realize debugging printing and shell interaction functions. Three LEDs are designed to indicate the operating status and the wireless module data receiving / sending status respectively.

[0033] The power module directly takes DC 5V from the USB interface as the power supply, uses the power chip to monitor voltage fluctuations, and abnormal voltage fluctuations can trigger the module reset. The 5V to 3.3V power chip is used to power other 3.3V chips in the board. The monitoring circuit is as follows Figure 4 shown.

[0034] The RF module is connected to the MCU through the TTL serial port. The RF module that supports MESH wireless self-organizing network and automatic relay function is selected. The wireless communication transceiver power unit and the networking management unit are integrated inside the module. The hardware design can support the adaptation of 2 different types of RF modules through the selection of resistor components. The RF circuit is as follows Figure 5 and Figure 6 As shown, it is convenient to meet the needs of different communication application scenarios. The RF module is welded on the bottom plate through stamp holes.

[0035] The connection principle between the wireless communication expansion module and the main control board is as follows Figure 7 As shown; the interface between the wireless communication expansion module and the main control board uses a 2×10, 2.54mm pitch socket as a connector, the pin assignment is shown in Figure 8 ; See Table 1 for the pin signal definitions used.

[0036] Table 1

[0037]

[0038] Note: Other signals in the table are not used.

[0039] The intelligent fusion terminal in the substation area builds a downlink wireless acquisition communication network implementation plan process through the wireless expansion module. First, install the wireless communication expansion module into the reserved expansion interface of the intelligent fusion terminal in the substation area, and install and deploy the corresponding service management software of the wireless expansion module in the intelligent fusion terminal in the substation area. Then, transform the terminal equipment that needs to be accessed into a wireless communication access method. For the existing equipment on site, it is generally completed by adding the corresponding matching wireless module slave node. The wireless module slave node completes the two-way forwarding of wireless data and RS485 or CAN communication interface, such as Fig. 9 shown.

Claims

1. A wireless communication expansion module for an intelligent fusion terminal in a substation, characterized in that: The wireless communication extension module is designed based on the extension module interface reserved by the station area intelligent fusion terminal, including an MCU controller, a power module, a radio frequency module, an antenna interface and a main control board interface, wherein: The wireless communication extension module is connected to the intelligent fusion terminal of the substation through the main control board interface; The MCU controller is connected to the main control board interface and the RF module for transmission control and processing of communication data; The antenna interface is connected to the radio frequency module and is used to communicate and transmit data with the acquisition access terminal device; The power module is respectively connected to the MCU controller, the radio frequency module, the antenna interface, and the main control board interface to provide electrical energy.

2. The wireless communication expansion module of the intelligent fusion terminal of the substation area according to claim 1 is characterized in that: The MCU controller communicates with the intelligent fusion terminal of the station area through a USB interface.

3. The wireless communication expansion module of the intelligent fusion terminal of the substation area according to claim 1 is characterized in that: The MCU controller is connected to the RF module via a serial port to configure and network the RF module to achieve wireless data transmission function.

4. The wireless communication expansion module of the intelligent fusion terminal of the substation area according to claim 1 is characterized in that: The RF module is soldered to the base plate through stamp holes.

5. The wireless communication expansion module of the intelligent fusion terminal of the substation area according to claim 1 is characterized in that: There are three LEDs to indicate the running status, wireless module data receiving status, and wireless module data sending status respectively.

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