Modularized extensible low-voltage distribution network monitoring device

Abstract

The utility model relates to the technical field of low-voltage distribution monitoring, in particular to a modularized extensible low-voltage distribution network monitoring device, which comprises a communication main module, a monitoring module, a load control module and an interface extension module. A power supply circuit, a microcontroller, a memory, a carrier signal modulation module and a metering unit are also arranged in the communication main module; the power supply circuit is electrically connected with the microcontroller, the HPLC communication unit and the metering unit respectively; the microcontroller is electrically connected with the metering unit, the memory and the carrier signal modulation module, and the HPLC communication unit is electrically connected with the carrier signal modulation module. Through modular design, high flexibility and expandability are realized, the module scale of the device can be flexibly adjusted according to actual requirements, and comprehensive monitoring of low-voltage transformer areas of different scales can be realized by increasing or reducing the number of monitoring modules.

Description

Technical Field

[0001] The utility model relates to the technical field of low - voltage power distribution monitoring, and particularly relates to a modular and expandable low - voltage power distribution network monitoring device. Background Technique

[0002] With the rapid development of smart grids, low - voltage sub - station data monitoring, as a key link to ensure the safe and efficient operation of the power grid, the improvement and optimization of its technical route are particularly important. At present, low - voltage sub - station data monitoring mainly relies on the sub - station integration terminal as the core component, which is responsible for comprehensively collecting the operation data of various intelligent devices.

[0003] However, there are still problems with incomplete coverage of monitoring devices in this low - voltage sub - station data monitoring method. Due to the wide variety and extensive distribution of sub - station equipment, and the fact that some old equipment has not been intelligentized, monitoring blind spots widely exist. This not only limits the comprehensiveness and accuracy of data monitoring, but also poses a potential safety hazard to the safe operation of the power grid. Secondly, there is a problem with inflexible architecture interfaces in monitoring through the sub - station integration terminal. The inability to expand the architecture interfaces results in less monitoring information, making it difficult to meet the real - time requirements of the development of low - voltage sub - station data monitoring. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a modular and expandable low - voltage power distribution network monitoring device, which includes a communication main module, a monitoring module, a load control module and an interface expansion module. An HPLC communication unit is embedded in the front side of the communication main module. The communication main module also includes a power supply circuit, a micro - controller, a memory, a carrier signal modulation module and a metering unit inside. The power supply circuit is electrically connected to the micro - controller, the HPLC communication unit and the metering unit respectively; the micro - controller is electrically connected to the metering unit, the memory and the carrier signal modulation module respectively, and the HPLC communication unit is electrically connected to the carrier signal modulation module.

[0005] The communication main module, the monitoring module, the load control module and the interface expansion module are provided with cascading female connectors on the same side; the monitoring module, the load control module and the interface expansion module are provided with cascading male connectors on the other side; the communication main module, the monitoring module, the load control module and the interface expansion module are sequentially plugged and connected through the cascading female connectors and the cascading male connectors.

[0006] To realize the overall power supply of the low - voltage power distribution network monitoring device, the power supply circuit of the communication main module is electrically connected to the cascading female connector, and the micro - controller is CAN - communication - connected to the cascading female connector.

[0007] In the specific implementation manner, the bottom of the communication main module is provided with an RS485 communication interface, an Ethernet interface and a CAN bus interface.

[0008] The bottom of the monitoring module is provided with an RS485 communication interface and an expansion interface.

[0009] To achieve modular scalability, several monitoring modules are provided, and each monitoring module is electrically connected to the next one through a cascading female port and a cascading male port in sequence.

[0010] Several load control modules and interface expansion modules are provided, and each load control module and each interface expansion module are electrically connected in sequence respectively.

[0011] To facilitate the quick installation of the device, card slots for installation are provided on the backs of the communication main module, the monitoring module, the load control module, and the interface expansion module.

[0012] To make the connections between the modules more firm and reliable, limiting holes are provided on one side of the cascading female ports of the communication main module, the monitoring module, the load control module, and the interface expansion module; limiting posts are provided on one side of the cascading male ports of the monitoring module, the load control module, and the interface expansion module.

[0013] In a specific embodiment, a relay is installed inside the load control module, and the relay is electrically connected to the cascading female port.

[0014] The bottom of the interface expansion module is provided with multiple RS485 communication interfaces and RS232 communication interfaces.

[0015] The beneficial effects are as follows: The present utility model is a modular and expandable low-voltage distribution network monitoring device. Through modular design, the device achieves a high degree of flexibility and scalability. The communication main module can exist independently and can also be connected to the monitoring module, the load control module, and the interface expansion module respectively to form a complete monitoring system, which can flexibly adjust the scale of the device modules according to actual needs. By increasing or decreasing the number of monitoring modules, comprehensive monitoring of low-voltage power distribution areas of different scales can be achieved, ensuring the integrity and accuracy of data monitoring.

[0016] At the same time, through the HPLC communication unit and the carrier signal modulation module of the device, the reliability and stability of data transmission are improved, ensuring the real-time nature and accuracy of monitoring data. Finally, through the design of the card slots and the limiting holes, the connections between the modules are made more firm and reliable; through the card slot design on the back, the installation and fixation of the device are facilitated; through the modular design concept, the device replacement is convenient and fast, reducing the operation cost and maintenance difficulty of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a combined diagram of the device of this application;

[0018] Figure 2Schematic diagram of the main communication module, where a is the front view of the main communication module, b is the right view of the main communication module, and c is the bottom view of the main communication module;

[0019] Figure 3 Schematic diagram of the monitoring module, where a is the front view of the monitoring module, b is the right view of the monitoring module, c is the left view of the monitoring module, and d is the bottom view of the monitoring module;

[0020] Figure 4 Schematic diagram of the load control module, where a is the front view of the load control module, b is the right view of the load control module, c is the left view of the load control module, and d is the bottom view of the load control module;

[0021] Figure 5 Schematic diagram of the interface expansion module, where a is the front view of the interface expansion module, b is the right view of the interface expansion module, c is the left view of the interface expansion module, and d is the bottom view of the interface expansion module;

[0022] Figure 6 Circuit diagram of the main communication module;

[0023] 1. Main communication module; 2. HPLC communication unit; 3. Cascade female port; 4. Cascade male port; 5. Limit hole; 6. Limit post; 7. Card slot; 8. Monitoring module; 9. Load control module; 10. Interface expansion module. Detailed implementation mode

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0025] Embodiment

[0026] See Figures 1 - 5 , this embodiment provides a modular and expandable low-voltage distribution network monitoring device, which is installed in the distribution station room power distribution cabinet, pole-mounted JP cabinet or low-voltage cable branch box, and accesses nodes such as intelligent circuit breakers, intelligent current transformers, electric meters, and sensors to collect and monitor the operation data of electrical equipment in the distribution substation area, and collect and monitor the data for centralized communication and upload. The low-voltage distribution network monitoring device includes a main communication module, a monitoring module, a load control module, and an interface expansion module. Among them, a cascade female port is provided on the side of the main communication module, a cascade male port is provided on one side of the monitoring module opposite to the main communication module, and a cascade female port is provided on the other side; a cascade male port is provided on one side of the load control module opposite to the monitoring module, and a cascade female port is provided on the other side; a cascade male port is provided on one side of the interface expansion module opposite to the load control module, and a cascade female port is provided on the other side.

[0027] The device realizes modular expansion through the cascading interface on the side. Specifically, the communication main module is plugged into the cascading male port of the monitoring module through the cascading female port. The bottom of the communication main module is provided with an RS485 communication interface, an Ethernet interface, and a CAN bus interface, and it can collect the operation data of electrical equipment by itself, such as voltage data and current data for metering and collection, and can communicate remotely with the cloud server. When there are no remaining interfaces at the bottom of the communication main module to connect the electrical equipment to be collected, the monitoring module is plugged in through the cascading female port. The bottom of the monitoring module is also provided with an RS485 communication interface and an expansion interface, which can connect multiple electrical nodes and are connected in parallel to the communication main module to feedback the operation data collected by the monitoring to the communication main module. In a specific implementation manner, several monitoring modules can be provided, and each monitoring module is electrically connected through the cascading interface in sequence.

[0028] Similarly, the monitoring module, the load control module, and the interface expansion module are sequentially plugged and electrically connected through the cascading female port and the cascading male port. The bottom of the load control module is also provided with an external wiring port, which can receive the control signal of the communication main module to perform closing control on the electrical equipment of multiple electrical nodes, and the bottom of the interface expansion module is provided with multiple RS485 communication interfaces and RS232 communication interfaces, which is convenient for various devices in the on-site low-voltage distribution area to be connected to the low-voltage distribution network monitoring device. Moreover, several load control modules and interface expansion modules can also be provided, and when there are no remaining interfaces in the load control module and the interface expansion module, several load control modules and interface expansion modules are allowed to be electrically connected in sequence.

[0029] In order to facilitate the installation of the low-voltage distribution network monitoring device on-site, card slots for installation are provided on the back of the communication main module, the monitoring module, the load control module, and the interface expansion module. Moreover, limiting holes are provided on one side of the cascading female ports of the communication main module, the monitoring module, the load control module, and the interface expansion module; limiting posts are provided on one side of the cascading male ports of the monitoring module, the load control module, and the interface expansion module. By inserting the limiting posts into the limiting holes, the combined installation and fixation of each module of the device are realized.

[0030] In addition, in order to realize the data collection and communication upload of parameters such as voltage and current by the communication main module, such as Figure 6As shown, the HPLC communication unit is embedded and installed on the front side of the communication main module. The communication main module also includes a power supply circuit, a microcontroller, a memory, a carrier signal modulation module, and a metering unit inside. The power supply circuit is electrically connected to the microcontroller, the HPLC communication unit, and the metering unit respectively. The communication main module is connected to the unidirectional bus for power taking. On the one hand, the voltage signal of the unidirectional bus is transmitted to the metering unit through the power supply circuit for metering detection. On the other hand, step-down processing is performed through the power supply circuit to supply power to the cascading female port, and the cascading female port uniformly supplies power to the monitoring module, the load control module, and the interface expansion module. The power supply circuit also supplies power to the microcontroller and the HPLC communication unit by converting alternating current into direct current. The communication main module is also connected to the current transformer, and the three-phase current signal of the current transformer is received through the metering unit for metering detection. The metering unit is electrically connected to the microcontroller and can transmit the voltage and current data of the metering detection to the microcontroller. The metering module can use the ATT7022EU chip. The microcontroller is electrically connected to the memory and the carrier signal modulation module respectively. The microcontroller can store the received data information in the memory and modulate the data information through the carrier signal modulation module. The carrier signal modulation module is electrically connected to the HPLC communication unit, and the carrier signal modulation module can upload the modulated signal data through the HPLC communication unit for communication, and the HPLC communication unit can communicate and upload with the cloud server.

[0031] The microcontroller of the communication main module is electrically connected to the cascading female port and can perform communication transmission to the cascading interfaces of the monitoring module, the load control module, and the interface expansion module through CAN communication. A relay is installed inside the load control module, and the relay is electrically connected to the cascading female port. The load control module receives the control signal of the communication main module through the cascading interface and drives the relay to open and close to achieve the on-off control of the point position.

Claims

1. A modular and scalable low-voltage distribution network monitoring device, characterized in that, It includes a communication main module, a monitoring module, a load control module and an interface expansion module. An HPLC communication unit is embedded and installed on the front side of the communication main module. The communication main module also includes a power supply circuit, a microcontroller, a memory, a carrier signal modulation module and a metering unit inside. The power supply circuit is electrically connected to the microcontroller, the HPLC communication unit and the metering unit respectively; the microcontroller is electrically connected to the metering unit, the memory and the carrier signal modulation module respectively, and the HPLC communication unit is electrically connected to the carrier signal modulation module. There is a cascading female port on the same side of the communication main module, the monitoring module, the load control module and the interface expansion module; there is a cascading male port on the other side of the monitoring module, the load control module and the interface expansion module; the communication main module, the monitoring module, the load control module and the interface expansion module are sequentially plugged and connected through the cascading female port and the cascading male port.

2. The low-voltage distribution network monitoring device according to claim 1, characterized in that The power supply circuit of the communication main module is electrically connected to the cascading female port, and the microcontroller is in CAN communication connection with the cascading female port.

3. The low-voltage distribution network monitoring device according to claim 1, characterized in that, The bottom of the communication main module is provided with an RS485 communication interface, an Ethernet interface and a CAN bus interface.

4. The low-voltage distribution network monitoring device according to claim 1, characterized in that, The bottom of the monitoring module is provided with an RS485 communication interface and an expansion interface.

5. The low-voltage distribution network monitoring device according to claim 1, characterized in that There are several monitoring modules, and each monitoring module is sequentially electrically connected through the cascading female port and the cascading male port.

6. The low-voltage distribution network monitoring device according to claim 5, characterized in that, There are several load control modules and interface expansion modules, and each load control module and each interface expansion module are sequentially electrically connected respectively.

7. The low-voltage distribution network monitoring device according to claim 1, characterized in that, The back surfaces of the communication main module, the monitoring module, the load control module and the interface expansion module are all provided with card slots for installation.

8. The low-voltage distribution network monitoring device according to claim 1, characterized in that There are limit holes on one side of the cascading female ports of the communication main module, the monitoring module, the load control module and the interface expansion module; there are limit posts on one side of the cascading male ports of the monitoring module, the load control module and the interface expansion module.

9. The low-voltage distribution network monitoring device according to claim 1, characterized in that A relay is installed inside the load control module, and the relay is electrically connected to the cascading female port.

10. The low-voltage distribution network monitoring device according to claim 1, wherein The bottom of the interface expansion module is provided with multiple RS485 communication interfaces and RS232 communication interfaces.

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