Ring main unit storage battery online health management device and method

Abstract

The invention discloses a ring main unit storage battery online health management device and method, and belongs to the technical field of ring main unit storage battery health management, and the device comprises a power supply module, a sensor module, an edge calculation module, a man-machine interface module, a communication module and an execution mechanism. Wherein the power supply module provides a stable power supply for the device, supports AC / DC dual-path input and has an automatic switching function; the sensor module collects operation parameters of a ring main unit storage battery. The edge calculation module carries out health state evaluation and fault diagnosis based on the collected operation parameters, generates a corresponding control instruction, drives an execution mechanism to respond to the control instruction, and carries out charge and discharge control on the storage battery; the communication module performs data interaction with the power distribution terminal and the power distribution automation platform; the man-machine interface module is used for local display, parameter setting and alarm indication. The ring main unit storage battery online health management system is simple in structure and easy to install, effectively achieves ring main unit storage battery online health management, and improves the operation stability and economical efficiency of a power distribution system.

Description

Technical Field

[0001] This invention belongs to the field of ring main unit battery health management technology, specifically relating to an online health management device and method for ring main unit batteries. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] As a key power source for the reliable operation of ring main units (RMS), batteries ensure the reliable opening and closing of circuit breakers even when the main power supply to the line fails, providing continuous power to the secondary control circuits and guaranteeing the normal operation of the distribution automation system. However, due to the cyclical nature of technological development and economic constraints, many batteries currently used in RMS systems are installed outdoors. Affected by high summer temperatures and low winter temperatures, and operating under overcharging and float charging conditions for extended periods, their performance deteriorates rapidly, easily leading to irreversible damage such as increased internal resistance and capacity decay.

[0004] The inventors discovered that current maintenance methods, which mostly rely on periodic manual inspections, suffer from problems such as long inspection cycles, poor data real-time performance, and delayed detection of potential faults. This makes it difficult to grasp the actual operating status of the battery in a timely manner, fails to provide early fault warnings, and is prone to sudden failures that can lead to serious faults such as switch failures, thus expanding the scope of the fault and affecting the reliability of power supply.

[0005] Therefore, there is an urgent need for an online management device suitable for low-cost retrofitting, capable of real-time monitoring, intelligent assessment, and early warning of battery health status. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online health management device and method for ring main unit batteries. This device and method are easy to install, effectively realize online health management of ring main unit batteries, avoid the risk of switch failure caused by battery failure, and thus improve the stability and economy of power distribution system operation.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: On one hand, the technical solution of the present invention provides an online health management device for ring main unit batteries, including: a power supply module, a sensor module, an edge computing module, a human-machine interface module, a communication module, and an actuator; wherein, the power supply module is used to provide a stable power supply for the device, supports AC and DC dual input and has an automatic switching function; the sensor module is used to collect the operating parameters of the ring main unit batteries; the edge computing module is used to perform health status assessment and fault diagnosis based on the collected operating parameters, generate corresponding control commands and drive the actuator to respond to the control commands, and implement charging and discharging control of the batteries; the communication module is used to interact with the power distribution terminal and the power distribution automation master station; the human-machine interface module is used for local display, parameter setting and alarm indication.

[0008] In at least one embodiment, the power supply module includes an AC / DC circuit, a DC / DC circuit, and a supercapacitor; the supercapacitor is used to provide energy storage support in the event of AC power failure, ensuring continuous operation of the device under extreme conditions.

[0009] In at least one embodiment, the sensor module includes voltage, current, and temperature acquisition units, contains a high-precision ADC sampling module, supports multi-channel synchronous sampling, and incorporates a low-temperature drift design to improve measurement stability.

[0010] In at least one embodiment, the edge computing module incorporates an adaptive filtering algorithm and a self-learning health assessment model. It dynamically corrects the battery health status by combining historical data and real-time parameters, compares it with the remaining lifespan judgment threshold, and issues local and remote alarms for batteries that are below the remaining lifespan threshold.

[0011] In at least one embodiment, the actuator includes a relay and a power drive circuit, which responds to instructions from the edge computing module to control an external AC / DC module to complete the switching of the charging and discharging circuit.

[0012] In at least one embodiment, the human-machine interface module includes a local display LCD screen, physical buttons, and indicator lights. The LCD screen is operated by the physical buttons, which supports parameter setting, status and fault alarm information query. The indicator lights display the device's operating status and fault alarms.

[0013] In at least one embodiment, the communication module uses an RS485 interface and the universal Modbus protocol to connect to the power distribution terminal at the field station and interact with the power distribution automation platform.

[0014] On the other hand, the technical solution of the present invention also provides an online health management method for ring main unit batteries, including: S1. After the ring main unit's battery online health management device is connected, power it on and perform a self-test to confirm that each functional unit is operating normally; S2. Real-time acquisition of battery voltage, current and temperature parameters; S3. Based on the collected data and the position of the actuator, the edge computing module determines whether the battery is in an overvoltage floating charge state. If so, a control command is generated to drive the actuator to perform charging and discharging activation operations on the battery. S4. During the activation process, the edge computing module continuously monitors the battery operation data, intelligently assesses the battery health status and predicts the remaining capacity life. When an abnormal change in the battery charging and discharging voltage is detected or the predicted remaining capacity life is lower than the set threshold, the edge computing module drives the human-machine interface module to issue an alarm and sends the alarm signal to the power distribution automation platform.

[0015] In at least one embodiment, in step S3, the charge-discharge activation operation specifically involves: performing a discharge activation operation according to a set timed activation cycle until the battery voltage is discharged to a value lower than the set value, then stopping the activation operation and connecting the AC input.

[0016] In at least one embodiment, step S4 specifically includes: during the charging and discharging operation of the battery by the actuator, the edge computing module continuously monitors the battery voltage, current and temperature change trends at a set sampling frequency, records them as historical curves and analyzes the voltage and current changes and temperature rise characteristics during the charging and discharging process in real time. Combining different battery electrochemical characteristics and aging mechanism models, it intelligently assesses the battery health status and predicts the remaining capacity life. When an abnormal change in battery charging and discharging voltage is detected, or the battery health status or predicted remaining capacity life is lower than a set threshold, the edge computing module drives the human-machine interface module to display alarm information on the LCD screen and light up the indicator light. At the same time, it sends a battery abnormality alarm signal to the power distribution automation platform through the communication module.

[0017] The beneficial effects of the above-described technical solution of the present invention are as follows: 1) The online health management device for ring main unit batteries of the present invention has a simple structure and high cost-effectiveness. It can be directly installed inside the ring main unit and easily connected to the battery, AC power supply, and field station power distribution terminal. It is suitable for the renovation and upgrading of old ring main units in the field. The device has a built-in multi-parameter synchronous sampling module and edge computing unit, which can collect key operating parameters such as battery voltage, charging and discharging current, and temperature in real time with high precision and high speed. It supports local abnormal alarm indication, remote early warning, and remote operation and maintenance functions for batteries, which can effectively avoid the risk of switch failure caused by battery failure, thereby improving the stability and economy of power distribution system operation.

[0018] 2) The power supply module built into the ring main unit battery online health management device of the present invention supports both AC and DC inputs and is designed with a supercapacitor. It can seamlessly switch to DC power supply when AC power fails and use the supercapacitor to provide energy storage support, ensuring that critical operations are not interrupted, significantly improving the device's adaptability to power grid fluctuations or fault scenarios, and ensuring the continuous operation of the monitoring system.

[0019] 3) The ring main unit battery online health management device of the present invention utilizes existing power distribution terminals and power distribution automation platforms for communication, reducing the deployment cost and construction difficulty of communication modules and avoiding redundant construction; it communicates with the power distribution terminal via the Modbus protocol, efficiently connecting to the main station power distribution automation platform (i.e., the power distribution automation master station), realizing real-time uploading of monitoring data and reliable reception of remote control commands, supporting remote firmware upgrades and parameter configuration, and greatly improving operation and maintenance efficiency; it supports local and remote operation and maintenance mechanisms, which can significantly improve the level of intelligent battery operation and maintenance and reduce the cost of manual intervention. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a schematic diagram of an online health management device for a ring main unit battery disclosed in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of an online health management method for a ring main unit battery disclosed in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of an online health management method for a ring main unit battery disclosed in Embodiment 2 of the present invention. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] As described in the background section, the purpose of this invention is to overcome the shortcomings of the prior art and provide an online health management device and method for ring main unit batteries. This device and method are simple in structure and easy to install, effectively realizing online health management of ring main unit batteries, avoiding the risk of switch failure caused by battery failure, thereby improving the stability and economy of power distribution system operation.

[0024] Example 1 In a typical embodiment of the present invention, such as Figure 1As shown in the figure, this embodiment discloses an online health management device for ring main unit batteries, including: a power supply module, a sensor module, an edge computing module, a human-machine interface module, a communication module, and an actuator. The power supply module provides a stable power supply to the device, supports AC / DC dual-channel input, and has an automatic switching function; the sensor module collects the operating parameters of the ring main unit battery; the edge computing module performs health status assessment and fault diagnosis based on the collected operating parameters, generates corresponding control commands, and drives the actuator to respond to the control commands, implementing charging and discharging control of the battery; the communication module interacts with the power distribution terminal and the power distribution automation platform; the human-machine interface module is used for local display, parameter setting, and alarm indication. The online health management device for ring main unit batteries disclosed in this embodiment has a simple structure and is easy to install. It does not require disassembling the original wiring. On-site, it is only necessary to connect the AC power supply L terminal of the ring main unit in series to the AC port of the power supply module, connect the battery in parallel to the DC port of the power supply module, connect the temperature sensor of the ring main unit to the sensor module, and finally connect the RS485 communication port to the power distribution terminal at the site.

[0025] In this embodiment, the power supply module uses an AC / DC power supply module to provide a stable power supply for the ring main unit's online battery health management device. It has a set of controlled AC input terminals and a set of DC input terminals, supporting dual AC / DC inputs and featuring automatic switching to ensure stable operation of the device under extreme conditions. The AC input terminals are connected in series to the AC power supply live wire of the ring main unit to control the AC power supply on / off; the DC input terminals are directly connected in parallel to the positive and negative terminals of the battery. During installation, the power supply module is connected to both the ring main unit's battery and the PT AC power supply to achieve dual AC / DC power supply. Furthermore, the AC / DC power supply module internally incorporates AC / DC circuits, DC / DC circuits, and a supercapacitor to ensure stable power supply. The supercapacitor ensures that in the event of battery over-discharge and line failure leading to AC power loss, it can drive the actuator to perform a closing action, providing energy storage support for the device. After the ring main unit's battery online health management device is installed, the power supply module will provide the converted stable power to each module of the device. If a situation occurs where the DC voltage is low and the AC power supply is lost at the same time, the device will use the energy stored in the supercapacitor to automatically drive the actuator and force the AC power input to be connected. This ensures that the ring main unit equipment can operate normally when the line power supply is restored, preventing the device from failing to power on due to excessive use of battery power and line fault power loss. This effectively ensures the stability of the power supply.

[0026] In this embodiment, the sensor module includes voltage, current, and temperature acquisition units, and incorporates a high-precision ADC sampling module, which can acquire battery voltage, charging / discharging current, and temperature parameters of the battery pack in real time. Furthermore, the sensor module supports multi-channel synchronous sampling to ensure the real-time performance and accuracy of data acquisition, and its low-temperature drift design enhances measurement stability under complex operating conditions.

[0027] In this embodiment, the edge computing module incorporates an adaptive filtering algorithm and a self-learning health assessment model. Equipped with a high-performance processor and embedded AI algorithms, it dynamically assesses the battery's State of Health (SOH) and Remaining Life (RUL) by combining historical data and real-time parameters, and supports online updates of model parameters. The operating parameters of the multi-dimensional ring main unit's batteries, collected by the sensor module, are isolated and transmitted to the edge computing module. First, an adaptive filtering algorithm is used to eliminate noise interference, effectively extracting subtle fault characteristics. Then, the self-learning health assessment model performs health status assessment and fault diagnosis based on the processed multi-dimensional data. Simultaneously, it dynamically adjusts the comparison between the battery's health status and remaining life threshold by combining historical data and real-time parameters. Batteries below the remaining life threshold trigger local and remote alarms, reminding maintenance personnel to replace them promptly, thus improving the level of automated early warning.

[0028] In this embodiment, the diagnostic results output by the edge computing module are uploaded to the field station distribution unit (DTU) via the communication module, and then uploaded to a remote distribution automation platform for storage and analysis via the same communication module. Furthermore, the edge computing module can also receive different activation control commands from the distribution automation platform via the communication module, driving the actuators to implement intelligent charging and discharging management of the battery, achieving regular activation maintenance and extending battery life.

[0029] In this embodiment, the human-machine interface module supports local status display and parameter configuration, enabling device parameter setting, calibration, and manual control command issuance via local operation, thus improving maintenance convenience. Furthermore, the human-machine interface module includes a local display LCD screen, physical buttons, and indicator lights. The LCD screen is operated via physical buttons, and the interface supports parameter setting, status, and fault alarm information queries. The indicator lights visually display the device's operating status and fault alarms, facilitating real-time monitoring of battery health, alarm information, and historical data by on-site maintenance personnel. Moreover, the relevant parameters and data set through the human-machine interface module communicate at high speed with the edge computing module via an SPI interface.

[0030] In this embodiment, the communication module adopts an RS485 interface and the universal Modbus protocol. It connects to the field station distribution terminal (DTU) and interacts with the distribution automation platform to send real-time monitoring data and alarm information.

[0031] In this embodiment, the actuator consists of a high-reliability relay group and a power drive circuit, and has overcurrent protection and electrical isolation functions. The actuator can respond to the instructions of the edge computing module to perform opening and closing actions, control the disconnection or connection of the external AC / DC circuit, complete the battery charging and discharging switching, and can dynamically adjust the activation frequency and depth to avoid the over-discharge or under-maintenance problems caused by traditional fixed-cycle maintenance.

[0032] In this embodiment, the components of the online health management device for ring main unit batteries work together to achieve data sensing, intelligent analysis, alarm uploading, and remote maintenance. The entire device is embedded locally within the ring main unit, featuring low power consumption and high reliability, and is suitable for long-term stable operation in complex electromagnetic environments. Specifically, a power supply module ensures stable power supply, a sensor module accurately acquires battery operating data, an edge computing module performs health status assessment and fault diagnosis and outputs control commands in case of faults, and an actuator responds to the control commands to implement charging and discharging control, achieving regular activation and maintenance of the ring main unit batteries and extending battery life. Simultaneously, a human-machine interface module enables local status display and parameter configuration, and a communication module facilitates data interaction between the field station power distribution terminal and the power distribution automation platform, enabling real-time uploading of monitoring data and reliable reception of remote control commands. It also supports remote firmware upgrades and parameter configuration, greatly improving operation and maintenance efficiency.

[0033] Example 2 In a typical embodiment of the present invention, such as Figure 2 and Figure 3 As shown, this embodiment discloses an online health management method for ring main unit batteries, which uses the online health management device for ring main unit batteries as described in Embodiment 1, and specifically includes the following steps: S1. After the ring main unit's battery online health management device is connected, power it on and perform a self-test to confirm that each functional unit is operating normally; S2. Real-time acquisition of battery voltage, current and temperature parameters; S3. Based on the collected data and the position of the actuator, the edge computing module determines whether the battery is in an overvoltage floating charge state. If so, a control command is generated to drive the actuator to perform charging and discharging activation operations on the battery. S4. During the activation process, the edge computing module continuously monitors the battery operation data, intelligently assesses the battery health status and predicts the remaining capacity life. When an abnormal change in the battery charging and discharging voltage is detected or the predicted remaining capacity life is lower than the set threshold, the edge computing module drives the human-machine interface module to issue an alarm and sends the alarm signal to the power distribution automation platform.

[0034] In step S1, the online health management device for the ring main unit battery described in Example 1 is connected to the ring main unit system. The power supply module provides the converted stable power to each module of the device. Each module of the device is powered on, and the edge computing module performs initialization and self-test to confirm that each functional unit is operating normally. If a situation occurs where the DC voltage is low and the AC power supply is lost at the same time, the device will automatically drive the actuator to forcibly connect the AC power input.

[0035] In step S2, after the ring main unit battery online health management device is running stably, the edge computing module calls the sensor module in real time to collect the voltage, current and temperature data of the battery pack at the set sampling frequency. The collected data is transmitted to the edge computing module after isolation processing.

[0036] In step S3, the edge computing module receives the voltage, current and temperature parameters collected by the sensor module, and determines whether the battery is in an overvoltage floating charge state based on the position of the actuator. If so, a control command is generated to drive the actuator to start the intelligent activation program. According to the set timed activation cycle, the discharge activation operation is performed until the battery voltage is lower than the set value, then the activation operation is stopped and the AC input is connected.

[0037] In step S4, during the charging and discharging operation of the battery by the actuator, the edge computing module continuously monitors the battery voltage, current, and temperature change trends at a set sampling frequency, records them as historical curves, and analyzes the voltage and current changes and temperature rise characteristics during the charging and discharging process in real time. Combining different battery electrochemical characteristics and aging mechanism models, it intelligently assesses the battery state of health (SOH) and predicts the remaining capacity life (RUL). All data is sent to the distribution automation platform via the communication module for the distribution automation platform to dynamically adjust subsequent operation and maintenance strategies. When abnormal changes in battery charging and discharging voltage are detected, or the battery state of health or predicted remaining capacity life (RUL) is lower than a set threshold, the edge computing module will drive the human-machine interface module to display alarm information on the LCD screen and illuminate the indicator light. At the same time, it will send a battery abnormality alarm signal to the distribution automation platform via the communication module, prompting maintenance personnel to intervene and check in a timely manner. The alarm thresholds, activation cycle, activation time, battery voltage, and capacity thresholds can all be maintained locally through the physical buttons of the human-machine interface module and the operation menu of the LCD screen, or automatically configured and remotely sent to the device for execution by the power distribution automation platform based on battery model, operating years, season, and climate.

[0038] The power distribution automation platform can comprehensively analyze the health trend of the ring main unit's batteries based on the received battery operation data and alarm information. It can also perform in-depth analysis and multi-source information fusion by combining weather, operation and maintenance records, and maintenance plans to generate ring main unit battery status information and early warning information, and formulate dynamic remote maintenance optimization strategies. For batteries that are determined to require immediate operation and maintenance, it can automatically generate differentiated operation and maintenance work orders and automatically issue operation and maintenance remote control commands. After receiving the remote control commands through the communication module, the edge computing module of the ring main unit battery online health management device drives the actuator to respond to the remote control commands and perform charging and discharging operations according to the battery status, while feeding the data back to the power distribution automation platform.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An on-line health management device for ring main unit battery, characterized in that, Comprise: Power supply module, sensor module, edge computing module, human-computer interface module, communication module and actuator; wherein the power supply module is used to provide stable power supply for the device, supports AC and DC double-way input and has automatic switching function; the sensor module is used to collect the operating parameters of the ring main unit battery; the edge computing module is used to evaluate the health state and diagnose the fault based on the collected operating parameters, generate corresponding control instructions and drive the actuator to respond to the control instructions, implement charge and discharge control on the battery; the communication module is used for data interaction with the power distribution terminal and the power distribution automation master station; the human-computer interface module is used for local display, parameter setting and alarm indication.

2. The online battery health management device for ring main unit according to claim 1, characterized in that, The power supply module comprises an AC / DC circuit, a DC / DC circuit and a super capacitor. The super capacitor is used to provide energy storage support when AC power is lost, ensuring that the device continues to operate under extreme conditions.

3. The online battery health management device for ring main unit of claim 1, wherein, The sensor module contains voltage, current and temperature collection units, which contain high-precision ADC sampling modules, support multi-channel synchronous sampling, and improve measurement stability by combining low temperature drift design.

4. The online battery health management device for ring main unit of claim 1, wherein, The edge computing module has built-in adaptive filtering algorithm and self-learning health evaluation model, which dynamically corrects the battery health state combined with historical data and real-time parameters, compares with the remaining service life judgment threshold, and alarms locally and remotely for the battery below the remaining life threshold.

5. The online battery health management device for ring main unit of claim 1, wherein, The actuator includes a relay and a power drive circuit, which responds to the edge computing module instruction to control the external AC / DC module to complete the charge and discharge loop switching.

6. The online battery health management device for ring main unit of claim 1, wherein, The human-computer interface module includes a local display liquid crystal screen, physical buttons and indicator lights, which operate the liquid crystal display screen through physical buttons, support parameter setting, state and fault alarm information query, and present device running state and fault alarm through indicator lights.

7. The online battery health management device for ring main unit of claim 1, wherein, The communication module uses RS485 interface and general Modbus protocol to access the field station power distribution terminal and interact with the power distribution automation platform.

8. An on-line battery health management method for ring main units, characterized in that, Comprise: S1. After the ring main unit battery online health management device is connected, power on and self-checking are performed to confirm that the function units are operating normally; S2. Real-time collection of voltage, current and temperature parameters of the battery; S3. Based on the collected data and combined with the position of the actuator, the edge computing module judges whether the battery is in overvoltage floating charge state, if yes, generates control instructions to drive the actuator to perform charge and discharge activation operation on the battery; S4. During the activation process, the edge computing module continuously monitors the battery operating data, intelligently evaluates the battery health state and predicts the remaining capacity life, and when detecting abnormal change of battery charge and discharge voltage or predicting that the remaining capacity life is lower than the set threshold, the edge computing module drives the human-computer interface module to alarm and sends the alarm signal to the power distribution automation platform.

9. The method for online battery health management of a ring main unit according to claim 8, characterized in that, In step S3, the charge and discharge activation operation is specifically: according to the set timing activation period, discharge activation operation is performed, and after discharging to a voltage lower than the set value, the activation operation is stopped and AC input is connected.

10. The method for online battery health management of a ring main unit according to claim 8, characterized in that, The step S4 specifically comprises: in the process of performing the charging and discharging operation on the battery by the actuator, the edge computing module continuously monitors the voltage, current and temperature change trend of the battery at a set sampling frequency, records the history curve and analyzes the voltage and current change and temperature rise characteristics in the charging and discharging process in real time, intelligently evaluates the battery health state and predicts the remaining capacity life in combination with different battery electrochemical characteristics and aging mechanism models; when detecting that the battery charging and discharging voltage abnormally changes, the battery health state or the predicted remaining capacity life is lower than the set threshold, the edge computing module drives the human-computer interface module to display the alarm information on the liquid crystal display screen and light up the indicator light, and simultaneously sends the battery abnormal alarm signal to the power distribution automation platform through the communication module.

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