Intelligent power distribution automation terminal

Abstract

The utility model relates to an intelligent power distribution automation terminal, which is characterized in that a voltage acquisition module, a current acquisition module, a remote signaling input module, a remote control output module and a main control module in the prior art are all integrated in a shell, a back plate is arranged in the shell, slots are arranged on the back plate, and corresponding joints on each module mounting back plate are connected with the back plate. A reinforcing shell can be adopted, a reinforcing plate or a reinforcing rib is arranged, a display screen, a manual input device and an indicating lamp are arranged on the front face of the shell, and installation in different modes can be achieved through the base, the bottom support, the lateral suspension frame and / or the top suspension frame and other different installation structures so as to better adapt to site conditions. The device has complete functions, does not need to additionally arrange an independent line loss detection device, a residual voltage detection device and the like, occupies a small area, and is convenient to install and use.

Description

Technical Field

[0001] The utility model relates to an intelligent power distribution automation terminal, which is mainly used for measurement, protection, control and communication of a power distribution automation system. Background Art

[0002] As a key component of intelligent distribution automation systems, research on intelligent distribution automation terminals is extremely important. These devices are crucial for the safe operation of equipment such as switchgear, ring main units, and pole-mounted switches. By continuously monitoring and storing distribution network information, they identify fault types, monitor switchgear status, and conduct real-time monitoring. Ultimately, this data is processed and analyzed to eliminate and isolate the fault. Advanced communication methods are then used to upload this information to the control room, ensuring a stable power supply. For example, Chinese patent document CN117013700A discloses an automatic power transmission and distribution method based on artificial intelligence, which includes extracting time-series power transmission data and time-series power distribution data from historical power data; extracting parameter load curves from the time-series power transmission data in turn; extracting a time-series power transmission feature set from the parameter load curve using a time domain window, training a preset power transmission analysis model into a time-series power transmission model using the time-series power transmission feature set, and training a preset power distribution analysis model into a distribution load model using the time-series power distribution data; analyzing the real-time power transmission load characteristics corresponding to the real-time power data using the time-series power transmission model, analyzing the real-time power distribution load characteristics corresponding to the real-time power transmission load characteristics using the distribution load model, and performing power transmission and distribution based on the real-time power transmission load characteristics and the real-time power distribution load characteristics. Chinese patent document CN114447949A discloses a method and system for remote monitoring of reactive compensation based on an intelligent fusion terminal in a substation; the remote monitoring method is used to realize remote monitoring and control of the operating status of the reactive compensation system, including the following processes: 1. System deployment stage: the intelligent fusion terminal in the substation is connected to the reactive compensation device and its reactive compensation controller via the RS485 bus interface, and is connected to the data center via power carrier communication or Ethernet. 2. Telemetry and telesignaling stage of reactive compensation information: the intelligent fusion terminal in the substation reads the operating status information of each device and uploads it to the data center; 3. Remote control and remote adjustment stage of reactive compensation status: the data center generates adjustment instructions based on the preset target parameters and real-time operating parameters of each reactive compensation device; and completes the adjustment of the reactive compensation status of the substation. Chinese patent document CN114696463A discloses an intelligent distribution system based on the IEC61850 standard, including a data layer, a process layer, and an application layer, which realizes the basic requirements of the current intelligent distribution network for terminal functions, and the modular design meets the needs of expanding different functions.Chinese patent document CN117080764A discloses an intelligent grounding wire device for distribution network sites, including an ABC three-phase grounding structure and a monitoring system. The former includes three independent grounding rod structures, each of which includes a grounding hook body, an insulating rod, a grounding wire, and a ground pin. The monitoring system includes a monitoring module and a monitoring host. The distance sensor is arranged on the wiring hook tongue of the grounding hook body, and the monitoring module is arranged at the connection between the grounding hook body and the insulating rod. The distance sensor transmits data to the monitoring module, which is internally equipped with a positioning module and a microprocessor. The monitoring module transmits data to the monitoring host via a wireless communication unit. The monitoring host includes a hanging wire detection control circuit, a wireless data transmission module, a satellite positioning module, an infrared ranging module, an internal power supply battery voltage detection circuit, and a communication module. Chinese patent document CN112748758A discloses a clock source selection method, apparatus, electronic device, and storage medium. The method includes: determining whether an external clock source is currently available; if at least one external clock source is currently available, determining a currently valid clock source based on the available external clock sources, and correcting the frequency of the local clock source based on the time interval between the valid clock source and the local clock source; otherwise, selecting the local clock source as the currently valid clock source. The clock source selection method, apparatus, electronic device, and storage medium provided by this application improve the accuracy and stability of the clock signal when an external clock source is unavailable. Chinese patent document CN116914745A discloses a line loss analysis and loss reduction method for a user station area, which includes the following line loss analysis process: using an edge computing intelligent distribution transformer terminal as a gateway, accessing the smart meter in the substation area through power line communication, short-range wireless communication, infrared communication, and radio frequency communication to collect power data from the substation area, and conducting a systematic line loss analysis on the user station area. Through line loss analysis, we can gain an in-depth understanding of the cause, nature, proportion of each component of the unit's line loss, and other factors, find out the main factors affecting the loss, and take corresponding measures in a targeted manner to achieve greater loss reduction effects and economic benefits with less investment. In addition, based on the line loss analysis, corresponding loss reduction measures are taken for specific line loss problems, thereby reducing the frequency of abnormal line loss fluctuations and stabilizing the normal operation of the user station area. Chinese patent document CN116482565A discloses a power supply anomaly detection method, device, equipment and storage medium, including analyzing the substation topology structure of the substation distribution system through high-speed power line carrier communication to determine the distribution system information of the substation distribution system; the distribution system information includes the substation terminal connection relationship and the electrical parameters of the substation power equipment in the substation distribution system; based on the distribution system information, the substation line loss and substation line loss rate of the substation distribution system are determined; based on the target power consumption data corresponding to the substation distribution system, the probability of abnormal power consumption is determined; based on the substation line loss, the substation line loss rate and the probability of abnormal power consumption, it is determined whether there is an abnormality in the low-voltage distributed power supply in the substation distribution system.Chinese patent document CN220022325U discloses an external intelligent residual voltage device for distribution terminals, comprising: an external residual voltage collection input terminal for collecting external residual voltage signals; an instantaneous residual voltage energy conversion module for obtaining power supply energy for the residual voltage signal and recording file management MCU; an instantaneous residual voltage signal sampling module for sampling the collected external residual voltage signal to obtain an external signal to be processed that can be input into the residual voltage signal and recording file management MCU; a residual voltage signal and recording file management MCU, respectively connected to the instantaneous residual voltage energy conversion module and the instantaneous residual voltage signal sampling module, for collecting and processing the input residual voltage signal; a residual voltage recording file storage module, connected to the residual voltage signal and recording file management MCU, for storing processed residual voltage recording files; a residual voltage signal and recording file output terminal, connected to the residual voltage signal and recording file management MCU and the secondary distribution terminal, for communicating with the secondary distribution terminal. Chinese patent document CN106771545A discloses a method for intelligently identifying 10kV line short-circuit fault voltages. The method constructs a feeder terminal consisting of a dual-CPU architecture consisting of a main CPU and a detection CPU. The feeder terminal quickly identifies the residual voltage or instantaneous voltage during a 10kV line short-circuit fault, providing a locking condition for feeder terminal fault isolation. Furthermore, when a 10kV power supply voltage transformer and related detection circuits outside the feeder terminal fail, the method intelligently diagnoses and provides corresponding fault information, promptly reminding users to inspect the pole-mounted switch assembly and ensure the equipment is in good operating condition.

[0003] These existing technologies incorporate different functions and corresponding hardware configurations based on specific requirements. These include: a standalone line loss module for measuring transmitted power; an external, dedicated residual voltage detection module for detecting instantaneous power restoration in the event of a power outage in both the protection system and the backup power supply; an external satellite timing and positioning module that outputs a timing signal to the distribution automation terminal, enabling high-precision timing; and an external Ethernet communication module for encrypted data communication. These hardware configurations meet practical needs in their respective applications and are well-suited to existing equipment and other on-site conditions.

[0004] Existing terminals often only accommodate one type of installation: bottom mounting, where a bracket or base is used to secure the terminal in a suitable location. However, this bottom mounting method isn't suitable for all site conditions. In some locations, wall / side mounting or top mounting may be more advantageous for saving space or facilitating easier viewing and operation. Furthermore, different mounting methods may require airflow from different directions to avoid obstruction or obstruction from surrounding objects. Utility Model Content

[0005] The purpose of the utility model is to improve the flexibility and adaptability of the installation of the intelligent power distribution automation terminal and to facilitate on-site installation and use.

[0006] The technical solution of the utility model is: an intelligent power distribution automation terminal, which is provided with a shell, a backboard is provided in the shell, and one or more modules for intelligent power distribution are connected to the backboard.

[0007] Furthermore, a display screen may be provided on the front side of the housing.

[0008] Furthermore, a manual input device may be provided on the front side of the housing.

[0009] Furthermore, the manual input device may include a plurality of input keys.

[0010] Preferably, when a display screen and a manual input device are provided on the front of the housing at the same time, the display screen is located at the upper part of the front of the housing, and the manual input device is located below the display screen.

[0011] Furthermore, a plurality of function indicator lights may be provided on the front of the housing.

[0012] Furthermore, the indicator light may include a working status indicator light and a power indicator light.

[0013] Preferably, the shell is a reinforced shell.

[0014] Preferably, the voltage acquisition module, the current acquisition module, the remote signal input module, the remote control output module and the main control module can all be integrated in the housing.

[0015] Furthermore, the voltage acquisition module, current acquisition module, remote signal input module and remote control output module can be plugged into corresponding slots (connectors) on the backplane and connected to the main control module through the backplane circuit.

[0016] Furthermore, the main control module is provided with a central processing unit, a line loss submodule, a residual voltage submodule, an analog-to-digital conversion submodule, a serial communication submodule, a satellite timing and positioning submodule, a remote control interface submodule, a remote signaling interface submodule and an Ethernet communication submodule.

[0017] Furthermore, the main control module is provided with connection circuits between each submodule and the central processing unit.

[0018] The beneficial effects of the present invention are as follows: since a suitable shell structure is provided, it not only helps to protect the modules and other components, but also can adopt a variety of installation methods such as base support, side suspension and top suspension according to actual conditions, which can meet various needs for installation methods in practice and adapt to a variety of different installation conditions; since different fan installation positions are provided, different fan orientations can be selected according to the actual installation site, further improving the adaptability to the site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the structural block diagram of the intelligent distribution automation terminal;

[0020] Figure 2 This is the structural block diagram of the main control module of the intelligent distribution automation terminal. DETAILED DESCRIPTION

[0021] This intelligent power distribution automation terminal is provided with a suitable housing, which contains a backplane and several modules (single boards / cards) connected (for example, plugged in) to the backplane. The modules are arranged according to the functions that the terminal should have and are used to perform various functions of the terminal. The backplane is provided with corresponding connection circuits and required connection interfaces such as slots / connectors. The display screen is installed on the front side of the housing (front panel) for displaying data and other information. According to actual needs, manual input devices such as input buttons can also be provided on the surface of the housing (for example, the front) for manual input.

[0022] See also Figure 1In order to achieve multi-functional integration, the circuits / chips in the line loss circuit (module), residual voltage detection circuit (module) and other independently set circuits (modules) that are located in independent devices can be integrated into an intelligent distribution automation terminal based on the architecture of existing technology, and the corresponding circuit boards (backplanes, single boards) and internal supporting wires can be used to replace the cable connections between the independent devices. Depending on the actual situation, the software functions can be executed by the original chips / circuits integrated into the same terminal, or some or all of the software functions can be concentrated in the same (group) of chips, and these functions can be implemented by loading the corresponding software. The voltage acquisition module (corresponding circuit / chip) and current acquisition module (circuit / chip) for collecting basic data can be plugged into the backplane as separate modules (single board / card). The line loss (analysis) unit (corresponding circuit / chip, or line loss submodule) and residual voltage (analysis) unit (corresponding circuit / chip, or residual voltage submodule) for performing corresponding data analysis and processing are installed on the main control module (single board, or card). Alternatively, the corresponding line loss (analysis) and residual voltage (analysis) software can be loaded on the main control module's central processing unit / processor. With the support of the corresponding software, the central processing unit performs the corresponding data processing / analysis functions performed by the existing independently installed line loss module (device) and residual voltage detection module (device). The backplane is provided with corresponding slots / ports for connecting the main control module, voltage acquisition module, current acquisition module, remote signal input module, remote control output module, and LCD panel / LCD display module.

[0023] See also Figure 2 The main control module (single board, or board) is equipped with a central processing unit (processor) and a line loss unit, a residual voltage unit, an analog-to-digital conversion unit (corresponding circuit / chip, or analog-to-digital conversion sub-module), a serial communication unit (corresponding circuit / chip, or serial communication sub-module), a satellite timing and positioning unit (corresponding circuit / chip, or satellite timing and positioning sub-module), a remote control interface unit (corresponding circuit / chip, or remote control interface sub-module), a remote signaling interface unit (corresponding circuit / chip, or remote signaling interface sub-module) and an Ethernet communication unit (corresponding circuit / chip, or Ethernet communication sub-module). The main control module is equipped with connection circuits between each sub-module and the central processing unit.

[0024] In the above implementation mode, the intelligent distribution automation terminal includes seven parts: a main control module, a voltage acquisition module, a current acquisition module, a telesignaling input module, a remote control output module, a back panel and a liquid crystal display panel. These seven parts share a power input. The main control module includes a satellite timing and positioning unit, a line loss unit, an Ethernet communication unit, a residual voltage unit, a telesignaling interface unit, a remote control interface unit, a serial communication unit and an analog-to-digital conversion unit.

[0025] The voltage acquisition module can adopt existing technology to filter, organize and isolate the voltage signal output by the voltage sensor and the voltage signal output by the battery, and then output them to the main control module. The voltage acquisition module filters, organizes, isolates and processes the signal sent by the bus voltage after the voltage sensor is transformed and the signal collected by the equipment battery, and then sends them to the analog-to-digital conversion unit and line loss unit of the main control module. The voltage signal is used to display the voltage information of the line and equipment and to determine whether the protection is activated.

[0026] The current acquisition module, which utilizes existing technologies, filters, organizes, and isolates the current signal output by the current sensor before transmitting it to the main control module. The module includes a current sensor. The busbar current signal, after being transformed by the current sensor, is filtered, organized, and isolated before being transmitted to the main control module's analog-to-digital conversion unit and line loss unit. The current signal is used to display line current information and determine whether protection has been activated. This current information can be used to assist in determining the operating status of the mechanism.

[0027] The remote signal input module utilizes existing technology to remotely connect to protection devices and output control commands to the master control module in real time. The remote signal input module is divided into hard and soft remote signals. Hard remote signals are used to input local close / open operation instructions, close / open status, and locking operation information; soft remote signals can be used to connect to comprehensive protection devices.

[0028] The remote control output module can adopt existing technology, can be provided with local remote control and / or remote remote control, and can monitor the opening / closing instructions in real time.

[0029] The backplane can adopt existing technology to realize data connection of other parts. The remote signal input module, remote control output module, main control module, voltage acquisition module, current acquisition module and liquid crystal display panel can be connected through pin terminals to provide electrical connection channels between each other. Each module is provided with a connector corresponding to the backplane for installation on the backplane.

[0030] The main control module can utilize any suitable data processing device (processor). This data processing device should be capable of loading appropriate software. With the support of this software, it can accept input from the voltage acquisition module, current acquisition module, and remote signal input module, perform appropriate data processing, and control the remote control output module and display screen for data output and display. Whether the various information acquisition and input / output facilities / modules are independently configured or integrated, the central control module's data analysis / processing methods are unaffected, and any suitable existing technology can be employed.

[0031] Under the existing technical background and with the support of corresponding software, the main task of the main control module is to integrate the functions of eight units, namely, Ethernet communication unit, satellite timing and positioning unit, line loss unit, residual voltage unit, telesignaling interface unit, remote control interface unit, serial communication unit and analog-to-digital conversion unit, and to control, receive, process and send the data connected by these eight functional units. The satellite timing and positioning unit collects satellite signals and outputs them to the central processing unit after isolation, encoding and processing, which can accurately locate and time; the Ethernet communication unit sends message data through the IPsec tunnel to the line master station operation terminal, which can ensure the confidentiality, integrity and authenticity of the data when accessing the public network during data transmission; the residual voltage unit can record the instantaneous residual voltage through hardware and send a locking signal when the device system loses power and the backup power supply loses power, so that when the device is powered on and normal operation is restored, a residual voltage reverse lock is generated, avoiding permanent faults when the device is closed, improving system protection reliability and reducing failure time; the line loss unit can be built into the main control module, and measure the changes in voltage and current in real time through the voltage acquisition module and the current acquisition module, monitor the line loss in the power system in real time, and transmit the data transmission technology to the monitoring center for easy analysis and management.

[0032] The housing preferably adopts a reinforced housing (a housing with a reinforcing structure), which can generally be a rectangular (cuboid) housing, provided with a rectangular (cuboid) frame and side panels (upper, lower, left, right, front, and rear) fixedly mounted on the sides of the rectangular frame. Reinforcing plates and / or ribs can be provided on the inner sides of the left, right, upper, and lower side panels to strengthen the housing as a whole. The frame can be formed by angle steel fixedly connected at the edge of each side of the housing (corresponding to the edges of the cuboid). The back panel is fixedly mounted to the bottom plate (lower panel), or the back plate (rear panel), or the left panel or right panel of the housing via multiple vibration-damping supports (for example, vibration dampers / vibration-damping pads arranged at the four corners of the back panel), with a gap between the back panel and the housing (the corresponding side panels of the housing) to reduce the impact of external vibration on the components / modules within the housing and to facilitate ventilation. The housing may be provided with a door, and the front, rear, left, or right side panels of the housing may be configured to be openable and closable (for example, one edge may be hinged to the housing frame, and a lock / securing device may be provided between the side opposite the hinge and the housing frame). The housing may be provided with a vent and a fan, and the vent may be a louvered vent.

[0033] Based on actual needs, multiple mounting structures in different directions, such as bases, bottom brackets, lateral hangers, and / or top hangers, can be provided on the bottom plate, left side panel, right side panel, top plate (upper side panel), and rear plate (partially or entirely) of the housing to better adapt to site conditions. The specific form of the mounting structure can be selected based on actual needs. For example, screw holes (e.g., welded nuts, or screw holes provided on a portion of a panel having a certain thickness) can be fixed on the housing so that fastening screws of the bracket / base can be tightened in the screw holes from the outside to achieve fixation of the bracket / base to the housing.

[0034] The housing can be equipped with multiple fan mounting locations (structures for mounting / installing fans) with different orientations / positions, allowing for selection of fan orientations / mounting locations based on the specific installation site, ensuring overall ventilation within the housing and further improving site adaptability. These different fan mounting locations can be located on various panels of the housing. For example, fan mounting locations can be located on some or all of the left, right, rear, top, and bottom panels. Compatible vents can be provided on the panel opposite the fan mounting location or on other suitable panels. The airflow generated by the fans within the housing should be directed to ventilate and dissipate heat for each module (backplane and boards) to avoid blocking the flow of air from one module to another. For example, the airflow generated by the fans can be roughly parallel to the plane in which the modules are located. Alternatively, air guide structures (air guide plates) can be provided to direct the airflow. If fan mounting locations require openings (fan holes / mounting holes) in the housing, the unused openings (fan holes / mounting holes) can be sealed with blind plates (enclosed plates).

[0035] Unless otherwise specified or when one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different specific implementation methods.

Claims

1. An intelligent power distribution automation terminal, provided with a housing, characterized in that A back plate is provided in the shell, and one or more modules for intelligent power distribution are connected to the back plate. The shell is a reinforced shell, and a bottom plate, a left panel, a right panel, a top plate and a rear plate of the shell are respectively provided with a plurality of mounting structures in different directions.

2. The intelligent distribution automation terminal according to claim 1, characterized in that A display screen is arranged on the front side of the housing.

3. The intelligent distribution automation terminal according to claim 1, characterized in that A manual input device is arranged on the front side of the shell.

4. The intelligent distribution automation terminal according to claim 3, characterized in that The manual input device includes a plurality of input keys.

5. The intelligent distribution automation terminal according to claim 1, characterized in that A display screen and a manual input device are arranged on the front of the shell. The display screen is located at the upper part of the front of the shell, and the manual input device is located below the display screen.

6. The intelligent distribution automation terminal according to claim 1, characterized in that The front side of the housing is also provided with a plurality of function indicator lights.

7. The intelligent distribution automation terminal according to claim 6, characterized in that The indicator lights include a working status indicator light and a power indicator light.

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