DTU equipment power supply circuit

Abstract

The utility model relates to the technical field of power electronics, in particular to a DTU equipment power supply circuit. Comprising a cabinet leading-in end, a double-path alternating current power supply switching module, an alternating current 220V-to-direct current 48V power supply module, a DC / DC module and a power supply output end, the input end of the double-path alternating current power supply switching module is electrically connected with the cabinet leading-in end; the output end of the double-path alternating current power supply switching module is electrically connected with the input end of the alternating current 220V-to-direct current 48V power supply module; the input end of the DC / DC module is electrically connected with the alternating current 220V-to-direct current 48V power supply module; and the output end of the DC / DC module is electrically connected with the power supply output end. In the prior art, a transient power-off phenomenon is easily caused in a power supply switching process, and the working stability and reliability of DTU equipment are influenced. Compared with the prior art, the reliability of the system can be ensured. Meanwhile, a stable direct-current power supply can be output, and the power supply requirements of different functional modules are met. Therefore, the utility model provides a stable and reliable DTU equipment power supply scheme.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a power supply circuit for a DTU device. Background Technology

[0002] Distribution terminal units (DTUs) are an important component of modern power systems and are widely used in smart grid construction. They enable real-time monitoring of the distribution network's operating status and ensure the system's stable and reliable operation through data acquisition and control functions. As the level of power system automation continues to increase, higher demands are placed on the stability and continuous power supply of DTU equipment. In particular, the ability to provide uninterrupted power supply in emergency situations has become a crucial indicator of the reliability of this type of equipment.

[0003] Existing power supply methods for DTU equipment typically include direct mains power, uninterruptible power supply (UPS), and backup batteries. While direct mains power is simple and convenient, it cannot guarantee normal equipment operation under unstable power conditions. UPS systems can provide power for a short period after a mains power outage, but they are bulky and expensive. Backup batteries, while providing some emergency power, have long charging cycles and are complex to maintain.

[0004] The aforementioned existing technologies have failed to effectively address the need for DTU equipment to quickly switch to backup power mode in emergency situations. The power switching process is prone to causing brief power outages, which affects the working stability and reliability of the DTU equipment. Utility Model Content

[0005] In view of the technical problems of the prior art, this utility model provides a power supply circuit for DTU equipment.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A power supply circuit for a DTU device includes: a cabinet input terminal, a dual-channel AC power switching module, an AC 220V to DC 48V power module, a DC / DC module, and a power output terminal; the input terminal of the dual-channel AC power switching module is electrically connected to the cabinet input terminal; the output terminal of the dual-channel AC power switching module is electrically connected to the input terminal of the AC 220V to DC 48V power module; the input terminal of the DC / DC module is electrically connected to the AC 220V to DC 48V power module; and the output terminal of the DC / DC module is electrically connected to the power output terminal.

[0008] Furthermore, the power output terminal includes a remote signaling 48V power output terminal and a plug-in busbar; the remote signaling 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module; the plug-in busbar is electrically connected to the output terminal of the DC / DC module.

[0009] Furthermore, the plug-in busbar includes a system 5V power output terminal and a remote control 48V power output terminal; the system 5V power output terminal is electrically connected to the 5V output terminal of the DC / DC module; the remote control 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module.

[0010] Furthermore, the power output terminal also includes a power supply line and a DC power output terminal; one end of the power supply line is electrically connected to the output terminal of the AC 220V to DC 48V power module; the other end of the power supply line is electrically connected to the DC power output terminal.

[0011] Furthermore, there are multiple power supply lines; the DC power output terminals include a local / remote operation 48V power output terminal, a motor 48V power output terminal, and a communication device power output terminal; one power supply line is electrically connected to the local / remote operation 48V power output terminal; one power supply line is electrically connected to the motor 48V power output terminal; and one power supply line is electrically connected to the communication device power output terminal.

[0012] Furthermore, it also includes a double-pole single-throw switch; there are two cabinet input terminals; each double-pole single-throw switch corresponds to one cabinet input terminal; one end of the double-pole single-throw switch is electrically connected to the cabinet input terminal; the other end of the double-pole single-throw switch is electrically connected to the input terminal of the dual-channel AC power switching module.

[0013] Furthermore, it also includes a debugging AC power socket; the debugging AC power socket is located between the dual-channel AC power switching module and the AC 220V to DC 48V power module; the AC power socket is electrically connected to the output terminal of the dual-channel AC power switching module. Attached Figure Description

[0014] Figure 1 Overall structure diagram. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] Example 1

[0017] A power supply circuit for a DTU (Distributed Terminal Unit) includes: a cabinet input terminal, a dual-channel AC power switching module, an AC 220V to DC 48V power module, a DC / DC module, a power output terminal, a double-pole single-throw switch, and an AC power socket for debugging. There are two cabinet input terminals. Each double-pole single-throw switch corresponds to one of the cabinet input terminals. One end of each double-pole single-throw switch is electrically connected to the cabinet input terminal. The other end of each double-pole single-throw switch is electrically connected to the input terminal of the dual-channel AC power switching module. The output terminal of the dual-channel AC power switching module is electrically connected to the input terminal of the AC 220V to DC 48V power module. The input terminal of the DC / DC module is electrically connected to the AC 220V to DC 48V power module. The output terminal of the DC / DC module is electrically connected to the power output terminal.

[0018] The power output terminals include a remote signaling 48V power output terminal, a plug-in busbar, a power supply line, and a DC power output terminal. The remote signaling 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module. The plug-in busbar is electrically connected to the output terminal of the DC / DC module. One end of the power supply line is electrically connected to the output terminal of the AC 220V to DC 48V power module. The other end of the power supply line is electrically connected to the DC power output terminal. Specifically, the plug-in busbar includes a system 5V power output terminal and a remote control 48V power output terminal. The system 5V power output terminal is electrically connected to the 5V output terminal of the DC / DC module. The remote control 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module.

[0019] The system includes multiple power supply lines. The DC power output terminals include a 48V power output for local / remote operation, a 48V power output for the motor, and a power output for the communication device. One power supply line is electrically connected to the 48V power output for local / remote operation. One power supply line is electrically connected to the 48V power output for the motor; and one power supply line is electrically connected to the power output for the communication device.

[0020] A test AC power socket is provided between the dual-channel AC power switching module and the 220V AC to 48V DC power module. The AC power socket is electrically connected to the output of the dual-channel AC power switching module.

[0021] Specifically, the cabinet's input terminal is used to connect to an external power source, which can be AC ​​mains or other types of power. To improve switching speed and stability, the dual-channel AC power switching module is electrically connected to the cabinet's input terminal and uses a double-pole single-throw switch to achieve a more stable electrical connection. The dual-channel AC power switching module is used to achieve fast and seamless switching between two power sources. The dual-channel AC power switching module mainly includes a double-pole single-throw switch and a switching controller, whose function is to quickly switch between the two power sources. For example, an electromagnetic relay can be selected as the switching component because it has a low switching time and can ensure smooth switching. The core of the AC 220V to DC 48V power module is a highly efficient and reliable rectifier that converts AC to DC. Common rectifiers include bridge rectifiers, which can integrate various power components, such as IGBTs and MOSFETs, high-performance semiconductor devices, ensuring high conversion efficiency and good stability. In addition, a filter circuit can be added to reduce ripple interference and enhance voltage output quality. The DC / DC module consists of multiple two-stage converters, mainly used to adjust the higher DC voltage to the required lower voltage output. Typical configurations include designs such as Buck converters or Cuk converters, designed to adjust the output voltage according to different load requirements. Specifically, Buck converters effectively reduce the input voltage to the required value while maintaining a constant output voltage, while Cuk converters can operate in both forward and reverse states, providing a more flexible current transmission path selection mechanism. Power output terminals include, but are not limited to, multiple subsystems such as the remote signaling 48V power output terminal and the plug-in busbar. The remote signaling 48V power output terminal is specifically responsible for powering remote communication interface devices, supporting long-distance signal transmission operations and ensuring accurate information transmission. The plug-in busbar integrates two main branches: the system's 5V power output terminal and the remote control 48V power output terminal. The former specializes in low-power microprocessor power supply applications, while the latter provides power to high-energy-consuming control units. These two branches complement each other to promote the coordinated operation of the entire circuit system.

[0022] The implementation principle of this embodiment is as follows: by carefully selecting high-quality electronic components and rationally arranging and assembling them, the entire power supply circuit possesses strong adaptability and good anti-interference characteristics. In particular, it can maintain stable operation even under the influence of various adverse environmental factors, effectively improving the overall reliability of the equipment.

[0023] Example 2

[0024] The difference between this embodiment and the previous one is the addition of a double-pole single-throw switch and a debugging AC power socket to facilitate on-site debugging and troubleshooting. A double-pole single-throw switch is a manually or automatically operated electrical component that can switch between two closed positions. Its structure typically consists of a contact group, a handle or rotating mechanism, and a housing. The contact group comprises several pairs of normally open or normally closed terminals, which can be moved relative to each other by external mechanical force to achieve the change of on / off state. It is commonly made of copper alloy, which has good conductivity and a long service life, making it suitable for long-term, frequent operation. The debugging AC power socket is located between the dual-circuit AC power switching module and the AC 220V to DC 48V power module, allowing maintenance personnel to easily insert standard testing equipment to check whether the circuit parameters meet the standards. The socket itself is compact and small, generally flat rectangular or circular in shape, and equipped with a safety cover to prevent dust, water droplets, and other impurities from entering and causing short circuits. The internal jacks are varied in number, allowing for the connection of probes of various specifications to measure current and voltage values, and also enabling the connection of external portable instruments to record fluctuation curves for subsequent analysis and reference.

[0025] The implementation principle of this embodiment is as follows: by adding auxiliary facilities to the existing system, the safety and convenience of the entire power supply solution are further improved. Whether during routine maintenance or emergency response to unforeseen circumstances, these new components can provide excellent assistance, reducing the probability of accidents and shortening the time required to troubleshoot, ultimately contributing to the steady progress of the overall project.

[0026] Example 3

[0027] The difference between this embodiment and the previous embodiment is that the number and types of power supply lines are further expanded. There are multiple power supply lines, including a 48V power output terminal for local / remote operation, a 48V power output terminal for the motor, and a power output terminal for the communication device. One end of each power supply line is electrically connected to the output terminal of the AC 220V to DC 48V power module, and the other end is connected to the corresponding power output terminal. For example, one power supply line is electrically connected to the 48V power output terminal for local / remote operation to power a specific device; another power supply line is electrically connected to the 48V power output terminal for the motor to ensure a stable power supply to the motor; and the last power supply line is electrically connected to the power output terminal for the communication device to ensure the normal operation of the communication equipment.

[0028] The implementation principle of this embodiment is as follows: by adding multiple power supply lines and power output terminals for different purposes, the flexibility and applicability of the entire power supply system are enhanced, better meeting the power supply needs of different types of equipment, and further improving the overall performance and reliability of the system.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A power supply circuit for a DTU device, characterized in that: include: Cabinet input terminal, dual-channel AC power switching module, AC 220V to DC 48V power module, DC / DC module, power output terminal; The input terminal of the dual-channel AC power switching module is electrically connected to the cabinet inlet terminal; The output terminal of the dual-channel AC power switching module is electrically connected to the input terminal of the AC 220V to DC 48V power module. The input terminal of the DC / DC module is electrically connected to the AC 220V to DC 48V power supply module; The output terminal of the DC / DC module is electrically connected to the power output terminal. The power output terminal includes a remote signaling 48V power output terminal and a plug-in busbar. The remote signaling 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module; The plug-in busbar is electrically connected to the output terminal of the DC / DC module; The plug-in busbar includes a system 5V power output terminal and a remote control 48V power output terminal. The system's 5V power output terminal is electrically connected to the DC / DC module's 5V output terminal. The remote control 48V power output terminal is electrically connected to the 48V output terminal of the DC / DC module.

2. The power supply circuit for a DTU device according to claim 1, characterized in that: The power output terminal also includes a power supply line and a DC power output terminal; One end of the power supply line is electrically connected to the output end of the AC 220V to DC 48V power module; The other end of the power supply line is electrically connected to the output terminal of the DC power supply.

3. The power supply circuit for a DTU device according to claim 2, characterized in that: The number of power supply lines is multiple; The DC power output terminals include a 48V power output terminal for local / remote operation, a 48V power output terminal for the motor, and a power output terminal for the communication device. One of the power supply lines is electrically connected to the local / remote operation 48V power output terminal. One of the power supply lines is electrically connected to the 48V power output terminal of the motor. One of the power supply lines is electrically connected to the power output terminal of the communication device.

4. The power supply circuit for a DTU device according to claim 1, characterized in that: It also includes double-pole single-throw switches; The cabinet has two inlet terminals; Each of the double-pole single-throw switches corresponds one-to-one with the cabinet inlet end; One end of the double-pole single-throw switch is electrically connected to the cabinet inlet end; The other end of the double-pole single-throw switch is electrically connected to the input end of the dual-channel AC power switching module.

5. A power supply circuit for a DTU device according to claim 1, characterized in that: It also includes an AC power socket for debugging; The AC power socket for debugging is located between the dual-channel AC power switching module and the AC 220V to DC 48V power module; The AC power socket is electrically connected to the output terminal of the dual-channel AC power switching module.

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