Direct current screen with insulation detection function

Abstract

The utility model belongs to the field of direct current screen equipment, relates to a direct current screen with insulation detection, and aims to solve the problems of weak insulation detection capability, non-standardization of a charging module, insufficient intelligence and the like of a traditional direct current screen, and realizes real-time monitoring and early warning by integrating high-precision independent positive and negative electrode insulation detection branches and an intelligent algorithm. An ER22010 series standard charging module is adopted to improve the reliability and maintenance convenience of the system, the Ethernet, RS485 and 4G wireless communication modules are integrated to realize multi-protocol remote monitoring and fault diagnosis, and meanwhile, the modular architecture design supports function extension and upgrade, so that the safety, reliability and operation and maintenance efficiency of the direct current power supply system are effectively improved, and the system is suitable for popularization and application. And the strict requirement of a modern power system on power supply stability is met.

Description

Technical Field

[0001] This utility model belongs to the field of DC power supply equipment and relates to a DC power supply with insulation detection. Background Technology

[0002] In power systems, DC power supply panels play a crucial role, acting as the heart to provide a stable DC power source for the entire system. These power supplies are widely used in substations, power plants, and industrial control systems, providing a continuous energy source for relay protection devices, control circuits, signal circuits, and emergency lighting. However, with the continuous development of power systems and the increasing demands for power supply reliability, the design of traditional DC power supply panels has gradually revealed some significant problems.

[0003] First, the lack or inadequacy of insulation detection functionality is a major weakness of existing DC power panels. Insulation faults are a significant issue in DC systems, potentially caused by various factors such as equipment aging, line dampness, and external damage. Once insulation performance deteriorates or fails, it can not only damage equipment but also trigger serious accidents such as short circuits and fires. However, many traditional DC power panels do not consider insulation detection as a crucial function in their design, or their insulation detection functions suffer from numerous shortcomings, such as low detection accuracy, slow response speed, and high false alarm and false negative rates. These problems make it difficult for the system to detect and handle insulation faults in a timely manner, thereby increasing the risk of power accidents.

[0004] Secondly, the non-standardized design of charging modules is a prominent problem with existing DC power supply systems. Traditional DC power supply systems often employ non-standardized structures in their charging module designs, meaning that charging modules from different brands and models are often not interchangeable or compatible. This not only increases equipment maintenance costs but also limits the system's scalability and flexibility. When a charging module malfunctions, it may be necessary to wait for repair or replacement from the original manufacturer, which not only prolongs downtime but may also affect the normal operation of the entire power system. Furthermore, non-standardized charging modules may have design flaws or shortcomings, such as low efficiency, high energy consumption, and poor heat dissipation, all of which directly affect the performance and reliability of the DC power supply system.

[0005] In addition to the aforementioned problems, existing DC power supply systems also have significant shortcomings in terms of intelligence and remote monitoring. With the rapid development of information technology, the intelligence level of power systems is constantly improving. However, many traditional DC power supply systems did not fully consider this in their design, and their control systems often employ outdated technical architectures and communication protocols, making real-time data exchange and remote control with remote monitoring centers impossible. This not only limits the system's intelligence level but also increases the workload and difficulty for maintenance personnel. When a DC power supply system malfunctions or experiences an anomaly, maintenance personnel may need to personally travel to the site to handle the issue, which not only prolongs troubleshooting time but may also increase maintenance costs and safety risks.

[0006] Furthermore, existing DC power supply panels also face challenges in terms of reliability and stability. Since DC power supply panels play a crucial role in power systems, their reliability and stability are essential for the safe operation of the entire system. However, some traditional DC power supply panels are prone to failure or abnormalities in actual operation due to design flaws, material quality issues, and manufacturing process problems. These problems not only affect the normal use of the DC power supply panels but may also threaten the safe operation of the entire power system.

[0007] In summary, while existing DC power supply panels with insulation detection meet the needs of power systems to a certain extent, they still have many problems in terms of insulation detection functionality, charging module design, intelligent and remote monitoring, as well as reliability and stability. Therefore, in order to further improve the performance and reliability of DC power supply panels and meet the actual needs of power systems, it is necessary to innovate and improve existing technologies. Utility Model Content

[0008] In view of this, the purpose of this utility model is to provide a DC power supply with insulation detection to solve the existing problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a DC power supply with insulation detection, comprising a charging module group, a main controller, an insulation detection module, and a communication interface module;

[0010] The charging module group consists of multiple parallel ER22010 series standardized charging modules. The output terminals of each module are connected in parallel to the positive and negative terminals of the DC bus through copper busbars of equal cross-section. The spacing between adjacent modules is 3U standard rack unit.

[0011] The main controller is connected to the communication management port of each charging module through a CAN bus communication network, and its analog signal acquisition terminal is electrically connected to the DC bus through a voltage divider resistor network.

[0012] The insulation detection module includes a positive detection branch and a negative detection branch. The positive detection branch is connected to the positive terminal of the DC bus after being connected in series with a first balancing resistor through a first fuse. The negative detection branch is connected to the negative terminal of the DC bus after being connected in series with a second balancing resistor through a second fuse.

[0013] The communication interface module is integrated inside the main controller and includes an Ethernet switch, an RS485 communication port, and a 4G wireless module. The Ethernet switch is connected to the factory monitoring network via an RJ45 interface.

[0014] Optionally, the charging module group adopts a modular installation structure, and each ER22010 series module includes:

[0015] The power output interface is equipped with a silver-plated copper busbar connector, which can be detachably connected to the system DC bus via a spring clamping mechanism.

[0016] The communication management interface uses shielded twisted-pair cable to connect to the CAN bus communication network.

[0017] The status indicator unit includes a three-color LED indicator group, which is connected to the internal control board of the module through an optocoupler isolation circuit.

[0018] Optionally, the main controller includes:

[0019] The central processing unit connects to a high-speed data acquisition card via a PCIe interface to acquire DC bus voltage and module operating parameters in real time.

[0020] The storage unit uses a SATA interface solid-state drive to store operating data and fault recording information;

[0021] The human-computer interaction unit connects to a 7-inch touchscreen display via an HDMI interface to display real-time insulation resistance monitoring values.

[0022] Optionally, the insulation detection module further includes:

[0023] The signal processing unit has its differential signal input terminal connected between the R1-R2 connection point and the system ground terminal;

[0024] The AD conversion unit converts the analog detection signal into a digital signal and then transmits it to the main controller via the RS485 bus.

[0025] The alarm output unit includes a dry contact relay that triggers an audible and visual alarm when an insulation fault is detected.

[0026] Optionally, the system communication network includes:

[0027] The first-level CAN bus uses twisted shielded wires to connect the communication ports of each charging module and transmit module operating status data.

[0028] The second-level Ethernet connects to the factory's SCADA system via fiber optic transceivers to transmit system operating parameters and alarm information.

[0029] The 4G wireless module has a built-in eSIM card and establishes a data connection with the remote monitoring center via the TCP / IP protocol.

[0030] Optionally, the mechanical structure of the standardized charging module includes:

[0031] Standardized mounting rails, adopting the 19-inch rack mounting structure of GB / T 3047.2-2003 standard;

[0032] The module's front panel is equipped with a locking mechanism to prevent accidental operation, which automatically locks after insertion into place;

[0033] The heat dissipation duct adopts an independent airflow design, forming a forced convection heat dissipation system with adjacent modules.

[0034] Optionally, the system further includes:

[0035] The battery pack is connected in parallel with the DC bus via an intelligent switching switch;

[0036] The battery inspection unit connects to each individual battery cell via multiple inspection lines to detect voltage and internal resistance parameters.

[0037] The main controller dynamically adjusts the output parameters of the charging module based on data from the insulation detection module and the battery inspection unit.

[0038] The beneficial effects of this utility model are as follows:

[0039] (1) Improved insulation fault detection capability: The built-in insulation detection module of this DC power supply can monitor the insulation status of the DC system in real time and detect potential insulation faults in a timely manner. Through high-precision detection technology and rapid response mechanism, the risk of power accidents caused by insulation faults can be effectively reduced, ensuring the safe operation of the power system.

[0040] (2) Enhanced system reliability: By adopting a standardized charging module design, the DC power supply achieves interchangeability and compatibility between modules, reducing the complexity and cost of equipment maintenance. At the same time, the standardized module design also helps to improve the overall reliability and stability of the system, reducing system downtime caused by module failures.

[0041] (3) Improved charging efficiency and energy utilization: The optimized charging module design not only improves charging efficiency but also reduces energy waste. Through intelligent control algorithms and efficient circuit structures, the DC power supply can dynamically adjust charging parameters according to actual needs, ensuring that the battery pack is in the optimal charging state, thereby extending battery life and reducing maintenance costs.

[0042] (4) Intelligent monitoring and management: This DC power supply unit integrates an advanced communication interface module, supporting multiple communication protocols and data transmission methods. Real-time remote monitoring and data transmission can be achieved through various communication methods such as Ethernet, RS485, and 4G wireless. Maintenance personnel can monitor the DC power supply unit's operating status in real time and perform remote operation and control through the remote monitoring center, improving maintenance efficiency and convenience.

[0043] (5) Facilitating System Expansion and Upgrades: The standardized modular design and flexible communication interfaces make this DC power supply easy to expand and upgrade. With the continuous development of the power system and changes in demand, new functional modules can be easily added or existing modules upgraded to meet new requirements. This scalability and flexibility enable the DC power supply to adapt to power system application scenarios of varying scales and complexities.

[0044] In summary, a DC power supply with insulation detection significantly improves the safety, reliability, and operation and maintenance efficiency of the power system by introducing an insulation detection module, adopting a standardized charging module design, and realizing intelligent monitoring and management, thus providing a strong guarantee for the stable operation of the power system.

[0045] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0047] Figure 1 This is a schematic diagram of the overall system of this utility model.

[0048] Attached reference numerals: 1. Charging module group; 2. Main controller; 3. Insulation detection module; 4. Communication interface module; 5. Battery group; 6. DC bus; 7. Battery inspection unit; 8. Monitoring network. Detailed Implementation

[0049] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0051] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Specific Implementation Example 1

[0053] Please see Figure 1 Structural components:

[0054] The DC power supply with insulation detection in this embodiment mainly consists of a charging module group 1, a main controller 2, an insulation detection module 3, a communication interface module (integrated in the main controller), a battery pack 5, a DC bus 6, a battery inspection unit 7, and a monitoring network 8.

[0055] Key component description:

[0056] Charging module group 1: It consists of multiple ER22010 series standardized charging modules connected in parallel and connected to DC bus 6 through copper busbars of equal cross-section. Each module has an independent communication interface and status indication unit.

[0057] Main Controller 2: Integrates data acquisition, storage, processing and human-machine interaction functions, communicates with the charging module group through the CAN bus, and monitors the status of each module in real time.

[0058] Insulation detection module 3: Includes positive and negative detection branches, which monitor the insulation resistance of the DC system in real time through high-precision resistors and AD converters. Once it falls below the set threshold, an alarm is triggered immediately.

[0059] Battery pack 5: As a backup power source, it is connected in parallel with the DC bus via an intelligent transfer switch to ensure the continuity of power supply to the system.

[0060] Battery Inspection Unit 7: Monitors the voltage and internal resistance of each cell in the battery pack in real time to ensure the healthy operation of the battery pack.

[0061] Working principle:

[0062] During normal operation of the DC power supply, the charging module group provides a stable DC power supply to the DC bus. The insulation detection module continuously monitors the system's insulation status, and the main controller dynamically adjusts the charging strategy based on the monitoring data. When an insulation fault occurs, the insulation detection module immediately alarms, and the main controller takes corresponding protective measures.

[0063] Specific embodiment 2,

[0064] Structural components:

[0065] Similar to Embodiment 1, but this embodiment has been optimized and upgraded in terms of the charging module group, insulation detection module and communication interface.

[0066] Key component description:

[0067] Charging Module Group 1 (Optimized Version): Adopts the latest generation of intelligent charging modules, which not only have efficient and stable charging performance, but also support remote online upgrades and fault diagnosis functions.

[0068] Insulation detection module 3 (optimized version): Based on the original, an adaptive algorithm has been added, which can automatically adjust the detection sensitivity according to the system operating status, thereby improving the accuracy and reliability of insulation fault detection.

[0069] Communication Interface Module 4: In this embodiment, the communication interface module is separated and adopts a modular design, supporting multiple communication protocols (such as Modbus, Profibus, etc.) to facilitate seamless integration with other smart devices.

[0070] New features:

[0071] Remote monitoring and fault diagnosis: Through communication interface module 4, maintenance personnel can remotely monitor the operating status of the DC power supply in real time, including the operating parameters of the charging module, insulation resistance value, battery status, etc. Simultaneously, the system supports remote fault diagnosis and early warning functions, enabling early detection of potential faults and providing handling suggestions.

[0072] Intelligent charging strategy: The main controller automatically adjusts the charging strategy based on the real-time status of the battery (such as SOC, SOH, etc.) and the system load requirements, realizing intelligent charging management. This not only extends the battery's lifespan but also improves the overall energy efficiency of the system.

[0073] Working principle:

[0074] Similar to Example 1, but with greater intelligence and adaptability in insulation detection and charging management. The system can automatically adjust detection sensitivity and charging strategy based on real-time operating data and preset algorithms to ensure the safe and efficient operation of the DC power supply.

[0075] As can be seen from the description of the two specific embodiments above, the DC power supply panel with insulation detection of this utility model not only possesses efficient charging and stable power supply performance, but also achieves comprehensive monitoring and management of the DC system by integrating an insulation detection module and an intelligent communication interface module. This design not only improves the reliability and safety of the system, but also provides maintenance personnel with more convenient and efficient management methods.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A DC power supply panel with insulation detection, characterized in that, It includes a charging module group, a main controller, an insulation detection module, and a communication interface module; The charging module group consists of multiple parallel ER22010 series standardized charging modules. The output terminals of each module are connected in parallel to the positive and negative terminals of the DC bus through copper busbars of equal cross-section. The spacing between adjacent modules is 3U standard rack unit. The main controller is connected to the communication management port of each charging module through a CAN bus communication network, and its analog signal acquisition terminal is electrically connected to the DC bus through a voltage divider resistor network. The insulation detection module includes a positive detection branch and a negative detection branch. The positive detection branch is connected to the positive terminal of the DC bus after being connected in series with a first balancing resistor through a first fuse. The negative detection branch is connected to the negative terminal of the DC bus after being connected in series with a second balancing resistor through a second fuse. The communication interface module is integrated inside the main controller and includes an Ethernet switch, an RS485 communication port, and a 4G wireless module. The Ethernet switch is connected to the factory monitoring network via an RJ45 interface.

2. A DC power supply with insulation detection according to claim 1, characterized in that, The charging module group adopts a modular installation structure, and each ER22010 series module includes: The power output interface is equipped with a silver-plated copper busbar connector, which can be detachably connected to the system DC bus via a spring clamping mechanism. The communication management interface uses shielded twisted-pair cable to connect to the CAN bus communication network. The status indicator unit includes a three-color LED indicator group, which is connected to the internal control board of the module through an optocoupler isolation circuit.

3. A DC power supply with insulation detection according to claim 1, characterized in that, The main controller includes: The central processing unit connects to a high-speed data acquisition card via a PCIe interface to acquire DC bus voltage and module operating parameters in real time. The storage unit uses a SATA interface solid-state drive to store operating data and fault recording information; The human-computer interaction unit connects to a 7-inch touchscreen display via an HDMI interface to display real-time insulation resistance monitoring values.

4. A DC power supply with insulation detection according to claim 1, characterized in that, The insulation detection module further includes: The signal processing unit has its differential signal input terminal connected between the R1-R2 connection point and the system ground terminal; The AD conversion unit converts the analog detection signal into a digital signal and then transmits it to the main controller via the RS485 bus. The alarm output unit includes a dry contact relay that triggers an audible and visual alarm when an insulation fault is detected.

5. A DC power supply with insulation detection according to claim 1, characterized in that, The communication network includes: The first-level CAN bus uses twisted shielded wires to connect the communication ports of each charging module and transmit module operating status data. The second-level Ethernet connects to the factory's SCADA system via fiber optic transceivers to transmit system operating parameters and alarm information. The 4G wireless module has a built-in eSIM card and establishes a data connection with the remote monitoring center via the TCP / IP protocol.

6. A DC power supply with insulation detection according to claim 1, characterized in that, The mechanical structure of the standardized charging module includes: Standardized mounting rails, adopting the 19-inch rack mounting structure of GB / T 3047.2-2003 standard; The module's front panel is equipped with a locking mechanism to prevent accidental operation, which automatically locks after insertion into place; The heat dissipation duct adopts an independent airflow design, forming a forced convection heat dissipation system with adjacent modules.

7. A DC power supply with insulation detection according to claim 1, characterized in that, Also includes: The battery pack is connected in parallel with the DC bus via an intelligent switching switch; The battery inspection unit connects to each individual battery cell via multiple inspection lines to detect voltage and internal resistance parameters. The main controller dynamically adjusts the output parameters of the charging module based on data from the insulation detection module and the battery inspection unit.

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