Power distribution automation station terminal

Abstract

The utility model provides a distribution automation station terminal which comprises a control panel and a wiring terminal strip, the control panel is in circuit connection with the wiring terminal strip, the control panel and the wiring terminal strip are in circuit connection with a core unit, the core unit comprises a COM board, a CPU board and a power board, the wiring terminal strip is provided with a connector or an expansion part, and the power board is provided with a power supply. The COM board and the CPU board are arranged on the sliding rail in a sliding mode, sliding grooves are formed in the two sides of the sliding rail, protruding parts on the rear sides of the COM board and the CPU board are embedded into the sliding grooves, the power panel is clamped into the C-shaped sliding buckle in a sliding mode, and through the COM board and the CPU board which are arranged on the sliding rail in a sliding mode and the mode that the power panel is clamped into the C-shaped sliding buckle in a sliding mode, rapid installation, disassembly and maintenance of hardware assemblies are achieved. And the usability and the flexibility of the equipment are greatly improved. The sliding buckle folded plate of the C-shaped sliding buckle can effectively prevent the power panel from falling off in the sliding process, and the stability and reliability of power connection are ensured.

Description

Technical Field

[0001] The utility model relates to the field of power distribution terminals, in particular to a power distribution automation station terminal. Background Art

[0002] With the development of the power market and economic construction, the reliability of distribution network power supply has become an important issue that power supply companies must consider first. In order to improve power supply capacity and ensure power supply quality, distribution network automation has become a very urgent task.

[0003] A distribution automation station terminal proposed in Chinese utility model patent application No. CN201521135517.8 includes a chassis, a mainboard and plug-ins connected to the mainboard, the plug-ins include a main processor plug-in, a signal plug-in, an output plug-in, an AC plug-in and a memory, and also includes a battery, a mains power interface and a power switch. The battery, the mains power interface and the power switch are connected, the power switch is electrically connected to the mainboard, and the battery provides power to the aforementioned mainboard and plug-ins.

[0004] However, there are some shortcomings in the existing distribution automation station terminal during use, and improvements are still needed. In the existing distribution automation station terminal technology, the installation, disassembly and maintenance process of hardware components are usually complicated and lack sufficient flexibility and ease of use. The traditional fixing method often uses screws or other fasteners to fix the board inside the equipment, which not only increases the difficulty of installation and disassembly, but also reduces the maintenance efficiency of the equipment. At the same time, when the board needs to be replaced or upgraded, the traditional fixing method often takes a lot of time and manpower, affecting the normal operation and performance improvement of the equipment. In addition, when the distribution automation station terminal in the prior art responds to external environmental factors such as vibration or impact, the stability of the hardware components is often difficult to ensure. Due to the lack of effective fixing and protection measures, the board is prone to loosening or falling off, resulting in equipment performance degradation or even failure. In terms of the design of the power board, the prior art usually adopts a direct insertion or screw fixing method. Although this method is simple, the installation accuracy is often difficult to guarantee, and it is easy to have looseness or poor contact at the power connection. In addition, the lack of an effective positioning device also makes the installation process of the power board cumbersome and error-prone. Therefore, we make improvements to this and propose a distribution automation station terminal. Utility Model Content

[0005] The purpose of the utility model is to address the problems raised by the existing background technology. In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions: a terminal of a distribution automation station, including a control panel and a terminal block, the control panel is connected to the terminal block circuit, the control panel and the terminal block are connected to the core unit circuit, the core unit includes a COM board, a CPU board, and a power board, the terminal block is provided with a connector or an extension component, the terminal block is connected to the communication module circuit, the COM board and the CPU board are slidably arranged on a slide rail, both sides of the slide rail are provided with a slide groove, the rear side protrusions of the COM board and the CPU board are embedded in the inside of the slide groove, the power board is slidably inserted into the C-type slide buckle, the edge of the C-type slide buckle is bent inwardly with a slide buckle folding plate, and a positioning hole is provided below the C-type slide buckle.

[0006] As a preferred technical solution of the utility model, the COM board is a communication board plug-in, adopts an ARM processor, and the COM board is provided with a power light, a running light and a multiplexed serial port transceiver light.

[0007] As a preferred technical solution of the utility model, the CPU board is an acquisition board plug-in, and the CPU board is provided with a DC acquisition unit, and the DC acquisition unit is connected to an external device or acquires the battery voltage DC in real time.

[0008] As a preferred technical solution of the utility model, the power board is provided with a power access interface, and the power access interface is provided with two modes of DC24V or DC48V. The power board is connected to the DC / DC conversion and filtering circuit and outputs two 5V power supplies.

[0009] As an optimal technical solution of the utility model, the basic error of the steady-state recording voltage of the core unit is: 0.05UN≤5.0%, 0.1UN≤2.5%, 0.5UN≤1.0%, 1.0UN≤0.5%, 1.5UN≤1.0%; the relative error of the steady-state recording current is: 0.1IN≤5.0%, 0.2IN≤2.5%, 0.5IN≤1.0%, 1.0IN≤0.5%, 5.0IN≤1.0%, 10IN≤2.5%.

[0010] As the preferred technical solution of the utility model, a single terminal of the core unit supports 64 analog accesses; voltage input nominal value: AC100V / AC220V 50Hz; current input nominal value: 1A / 5A50Hz; voltage sampling accuracy: level 0.5; current sampling accuracy: level 0.5 (≤1.2In), 5P10 (≤10In).

[0011] As the preferred technical solution of the utility model, the active power and reactive power sampling accuracy of the core unit is: Level 1; at the nominal input value, the power consumption of each circuit is ≤0.5VA; AC overload capacity: 1.2In or 1.2Un, continuous operation; 20In, allowed to last for 1s.

[0012] As the preferred technical solution of the utility model, the remote signal power supply of the core unit supports DC24V / 48V adaptation; supports a maximum of 116 hard remote signals; the remote signal resolution is ≤2ms; and the anti-jitter time is 0 to 60000ms.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: In the scheme of the utility model: by sliding the COM board and the CPU board set on the slide rail, and sliding the power board into the C-shaped slide buckle, the hardware components can be quickly installed, disassembled and maintained, which greatly improves the usability and flexibility of the equipment.

[0014] The slide rails and slots allow the COM board and CPU board to be firmly fixed inside the device. This sliding installation method also makes it easy to replace or upgrade the board to adapt to different application scenarios and performance requirements. The rear protrusion is embedded in the slot, which not only enhances the stability of the board, but also effectively prevents loosening or falling off due to vibration or impact.

[0015] The power board slides into the C-shaped slider, which simplifies the installation process of the power board and improves the installation accuracy. The slider folding plate of the C-shaped slider can effectively prevent the power board from falling off during the sliding process, ensuring the stability and reliability of the power connection. The positioning hole under the C-shaped slider not only facilitates the positioning and installation of the power board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure provided by the utility model;

[0017] Figure 2 A schematic diagram of the slide rail structure provided by the utility model;

[0018] Figure 3 This is a schematic diagram of the C-type sliding buckle structure provided by the utility model;

[0019] Figure 4 A schematic diagram of the core unit structure provided by the utility model;

[0020] Figure 5 The overcurrent I (II, III) protection logic diagram provided by the utility model;

[0021] Figure 6 A schematic diagram of the overcurrent inverse time protection provided by the utility model;

[0022] Figure 7 The overload protection logic diagram provided by the utility model;

[0023] Figure 8 This is a schematic diagram of the secondary reclosing switch provided by the utility model.

[0024] Indicated in the figure:

[0025] 1. Control panel; 2. Terminal block; 3. Core unit; 301. COM board; 302. CPU board; 303. Power board; 3031. Power access interface; 4. DC flow acquisition unit; 5. Slide rail; 6. Slide groove; 7. C-type slide buckle; 701. Slide buckle folding plate; 8. Positioning hole. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0027] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model for which protection is sought, but merely represents some embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should be noted that the embodiments of the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Example 1: Please refer to Figure 1-Figure 8 A distribution automation station terminal includes a control panel 1 and a terminal block 2. The control panel 1 is circuit-connected with the terminal block 2. The control panel 1 and the terminal block 2 are circuit-connected with a core unit 3. The core unit 3 includes a COM board 301, a CPU board 302, and a power board 303. The terminal block 2 is provided with a connector or an expansion component. The terminal block 2 is circuit-connected with a communication module. The COM board 301 and the CPU board 302 are slidably arranged on a slide rail 5. Slide grooves 6 are arranged on both sides of the slide rail 5. The rear protruding parts of the COM board 301 and the CPU board 302 are embedded in the interior of the slide groove 6. The power board 303 is slidably inserted into a C-type slide buckle 7. The edge of the C-type slide buckle 7 is bent inwardly with a slide buckle folding plate 701, and a positioning hole 8 is arranged below the C-type slide buckle 7.

[0029] By sliding the COM board 301 and the CPU board 302 set on the slide rail 5, and the power board 303 sliding into the C-shaped slide buckle 7, the hardware components can be quickly installed, disassembled and maintained, which greatly improves the ease of use and flexibility of the device. First, the slide rail 5 and the slide groove 6 enable the COM board 301 and the CPU board 302 to be firmly fixed inside the device. At the same time, this sliding installation method is also convenient for replacing or upgrading the board, so as to adapt to different application scenarios and performance requirements. In addition, the rear protruding part is embedded in the slide groove 6, which not only enhances the stability of the board, but also effectively prevents loosening or falling off caused by vibration or impact. Secondly, the power board 303 slides into the C-shaped slide buckle 7, which simplifies the installation process of the power board 303 and improves the installation accuracy. The slide buckle folding plate 701 of the C-shaped slide buckle 7 can effectively prevent the power board 303 from falling off during the sliding process, ensuring the stability and reliability of the power connection. In addition, the positioning hole 8 below the C-shaped slider 7 not only facilitates the positioning and installation of the power board 303, but also makes the layout of the entire power module more compact and reasonable, thereby optimizing the internal space utilization of the device.

[0030] COM board 301 is a communication board plug-in, using an ARM processor, and is provided with a power light, a running light, and a multiplexed serial port transceiver light. CPU board 302 is a collection board plug-in, and is provided with a DC flow collection unit 4, which is connected to an external device or collects the battery voltage DC in real time.

[0031] The power board 303 is provided with a power access interface 3031, and the power access interface 3031 is provided with two modes of DC24V or DC48V. The power board 303 is connected to the DC / DC conversion and filtering circuit and outputs two 5V power supplies.

[0032] The basic error of steady-state recording voltage of core unit 3 is: 0.05UN≤5.0%, 0.1UN≤2.5%, 0.5UN≤1.0%, 1.0UN≤0.5%, 1.5UN≤1.0%; the relative error of steady-state recording current is: 0.1IN≤5.0%, 0.2IN≤2.5%, 0.5IN≤1.0%, 1.0IN≤0.5%, 5.0IN≤1.0%, 10IN≤2.5%.

[0033] A single terminal of core unit 3 supports 64 analog accesses; voltage input nominal value: AC100V / AC220V50Hz; current input nominal value: 1A / 5A 50Hz; voltage sampling accuracy: level 0.5; current sampling accuracy: level 0.5 (≤1.2In), 5P10 (≤10In).

[0034] The active power and reactive power sampling accuracy of core unit 3 is: Level 1; at the nominal input value, the power consumption of each circuit is ≤0.5VA; AC overload capacity: 1.2In or 1.2Un, continuous operation; 20In, allowed to last for 1s. The remote signal power supply of core unit 3 supports DC24V / 48V adaptive; supports up to 116 hard remote signals; remote signal resolution is ≤2ms; anti-jitter time is 0~60000ms.

[0035] Working process: When the distribution automation station terminal is working, it is first connected to the external device or power supply through the terminal block 2. The power board 303 in the core unit 3 outputs two stable 5V power supplies through DC / DC conversion and filtering circuits according to the connected power type DC24V or DC48V, providing a stable power supply for the entire system.

[0036] The CPU board 302 is used as an acquisition board plug-in, and collects DC data such as battery voltage in real time through the DC acquisition unit 4, and processes and analyzes these data. At the same time, the COM board 301 is used as a communication board plug-in, using an ARM processor to perform high-speed data processing and communication tasks, and displays the communication status through indicators such as multiplexed serial port transceiver lights. When it is necessary to expand functions or connect more devices, it can be expanded through the connectors or expansion components on the terminal block 2. The communication module is responsible for data exchange and remote control with other devices or systems.

[0037] The core unit 3 of the distribution automation station terminal adopts a modular design, in which the COM board 301, the CPU board 302 and the power board 303 are all set on the slide rail 5 in a sliding manner, which is convenient for installation, disassembly and maintenance. This design makes the connection between the various components more compact and stable, and also improves the seismic performance of the equipment.

[0038] In terms of data processing, the CPU board 302 uses the DC data acquisition unit 4 to collect the voltage of the external device or battery in real time, and processes and analyzes the collected data through internal algorithms. These data can reflect the operating status of the device and the health of the battery, providing a basis for subsequent decision-making and control.

[0039] COM board 301 is responsible for data communication tasks. It uses an ARM processor for high-speed data processing and communication protocol conversion. By multiplexing indicators such as the serial port transceiver light, you can intuitively understand the communication status and data transmission status. The power board 303 performs voltage conversion and filtering according to the type of power supply connected, and outputs two stable 5V power supplies to provide reliable power supply for the entire system. At the same time, the power board 303 also has overvoltage, overcurrent and other protection functions to ensure that the device can be safely shut down or restarted under abnormal conditions.

[0040] The core unit 3 also has high-precision sampling and strong overload capacity, which can maintain the accuracy and stability of data in various complex environments. Through optimized algorithms and circuit design, the terminal also achieves accurate sampling and calculation of parameters such as active power and reactive power.

[0041] During the use of the utility model, the core unit 3 of the terminal of the distribution automation station mainly protects the logic, such as Figure 5 As shown, the overcurrent I (II, III) stage protection logic. Figure 5 In the figure, Iset is the current setting value of overcurrent section I (II, III); Tset is the time setting value of overcurrent section II (or III).

[0042] like Figure 6 As shown, the overcurrent inverse time protection of the core unit 3 of the distribution automation station terminal includes the following three options: general inverse time, very inverse time and extreme inverse time. Figure 6 In the figure, Iset is the overcurrent inverse time current setting value; I is the current current value; Tset is the inverse time delay constant. For overcurrent inverse time protection, the timing starts when the current is greater than the overcurrent inverse time current setting value.

[0043] like Figure 7 As shown, it is the overload protection logic. Figure 7 In the figure, Iset is the overload current setting value, Ia, Ib and Ic are the three-phase currents respectively; Tset is the overload time setting value.

[0044] like Figure 8 The figure shows the secondary reclosing switch, which can not only effectively prevent the occurrence of faults, but also quickly restore the power supply of the power grid system in transient faults to ensure the safety and reliability of power supply, thus reducing the inconvenience and economic losses caused by power outages. The reclosing switch plays a vital role in the normal operation of the power system and the reliable power supply of the load. T1set is the setting time of the primary reclosing switch; T2set is the setting time of the secondary reclosing switch; Tbsset is the locking time of the secondary reclosing switch; t starts from zero after the primary reclosing switch.

[0045] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A distribution automation station terminal, comprising a control panel (1) and a terminal block (2), wherein the control panel (1) is circuit-connected to the terminal block (2), and is characterized in that: The control panel (1) and the terminal block (2) are connected to the circuit of the core unit (3); the core unit (3) comprises a COM board (301), a CPU board (302) and a power board (303); the terminal block (2) is provided with a connector or an expansion component; the terminal block (2) is connected to the circuit of the communication module; the COM board (301) and the CPU board (302) are slidably arranged on a slide rail (5); slide grooves (6) are arranged on both sides of the slide rail (5); rear protruding parts of the COM board (301) and the CPU board (302) are embedded in the interior of the slide groove (6); the power board (303) is slidably inserted into a C-shaped slide buckle (7); the edge of the C-shaped slide buckle (7) is bent inwardly to form a slide buckle folding plate (701); and a positioning hole (8) is arranged below the C-shaped slide buckle (7).

2. A distribution automation station terminal according to claim 1, characterized in that: The COM board (301) is a communication board plug-in, adopting an ARM processor. The COM board (301) is provided with a power light, a running light and a multiplexed serial port transceiver light.

3. A distribution automation station terminal according to claim 2, characterized in that: The CPU board (302) is a collection board plug-in. The CPU board (302) is provided with a DC quantity collection unit (4). The DC quantity collection unit (4) is connected to an external device or collects the DC quantity of the battery voltage in real time.

4. A distribution automation station terminal according to claim 3, characterized in that: The power board (303) is provided with a power access interface (3031), and the power access interface (3031) is provided with two modes of DC24V or DC48V. The power board (303) is connected to a DC / DC conversion and filtering circuit and outputs two 5V power supplies.

5. A distribution automation station terminal according to claim 4, characterized in that: The core unit (3) has a basic error of steady-state waveform recording voltage: 0.05UN≤5.0%, 0.1UN≤2.5%, 0.5UN≤1.0%, 1.0UN≤0.5%, 1.5UN≤1.0%; a relative error of steady-state waveform recording current: 0.1IN≤5.0%, 0.2IN≤2.5%, 0.5IN≤1.0%, 1.0IN≤0.5%, 5.0IN≤1.0%, 10IN≤2.5%.

6. A distribution automation station terminal according to claim 5, characterized in that: A single terminal of the core unit (3) supports 64 analog quantity accesses; voltage input nominal value: AC100V / AC220V50Hz; current input nominal value: 1A / 5A 50Hz; voltage sampling accuracy: 0.5 level; current sampling accuracy: 0.5 level (≤1.2In), 5P10 (≤10In).

7. A distribution automation station terminal according to claim 6, characterized in that: The active power and reactive power sampling accuracy of the core unit (3) is: Level 1; at the nominal input value, the power consumption of each circuit is ≤0.5VA; AC overload capacity: 1.2In or 1.2Un, continuous operation; 20In, allowed to last for 1s.

8. A distribution automation station terminal according to claim 7, characterized in that: The remote signal power supply of the core unit (3) supports DC24V / 48V self-adaptation; supports a maximum of 116 hard remote signals; the remote signal resolution is ≤2ms; and the anti-jitter time is 0 to 60000ms.

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