Fluxgate-based low-voltage distribution network loop monitoring system and topological structure thereof

Abstract

The invention belongs to the technical field of loop monitoring, and discloses a fluxgate-based low-voltage distribution network loop monitoring system, which comprises a low-voltage loop monitoring device and a cloud monitoring platform, the low-voltage loop monitoring device comprises a fluxgate sensor module, a current and voltage measurement module, an acquisition controller, a power supply module and a 4G gateway module. The low-voltage distribution network loop monitoring system based on the fluxgate provided by the invention can accurately monitor small current changes in an electrified state, identifies electric leakage, short circuit and other faults in real time, and transmits data to the cloud platform through the 4G gateway module for analysis and remote monitoring. In addition, the system has early warning capability, can effectively identify potential hazards such as line aging, prevents risk deterioration from the source, and ensures the safety and stability of a power supply system.

Description

Technical Field

[0001] The present invention belongs to the technical field of loop monitoring, and in particular relates to a low-voltage distribution network loop monitoring system based on a fluxgate and a topological structure thereof. Background Art

[0002] As the demand for electricity in residential areas continues to grow, the safety and stability of the power supply system has become increasingly important. Ensuring the normal operation of low-voltage circuits under variable load conditions has become a core part of power supply security. In order to effectively prevent electrical fires and power outages caused by leakage, short circuits, poor contact and other problems, a method that can accurately detect low-voltage circuit faults is urgently needed to comprehensively improve power supply safety.

[0003] Existing low-voltage circuit detection equipment has deficiencies in detection accuracy and efficiency. They are usually unable to accurately detect small current changes in the live state, which can easily lead to missed faults or false alarms, increasing safety hazards. In addition, traditional detection methods require power outages, which are complex and time-consuming, and cannot meet the needs of rapid response, especially in emergency situations, where it is difficult to detect and handle faults in a timely manner. In addition, traditional detection equipment has limited information transmission and processing capabilities, and usually only has simple data recording functions and lacks real-time monitoring and analysis capabilities. This results in the inability to fully utilize detection data, making it difficult to achieve comprehensive fault warning and remote monitoring, and reducing the reliability and practicality of the system.

[0004] As the demand for electricity in residential areas continues to grow, ensuring the safety and stability of the power supply system has become a key task. The normal operation of the low-voltage circuit plays a vital role in ensuring the reliability of power supply. At present, there are many challenges in the traditional monitoring methods to ensure the stable operation of the power system, including the lack of fault detection accuracy and real-time response capabilities. Therefore, there is an urgent need for a method that can efficiently monitor the status of the low-voltage circuit to prevent potential problems such as leakage, short circuit, and poor contact from causing electrical fires and power outages.

[0005] The existing methods for low-voltage circuit fault monitoring are mainly the following:

[0006] Traditional manual monitoring method. This method relies on engineers to use various tools on site to manually measure electrical parameters, including current, voltage, and insulation resistance. Common tools such as digital multimeters, current clamps, and insulation resistance testers need to be manually operated by engineers, and data collection and analysis are also done manually. These tools do not have automation functions and lack real-time monitoring capabilities, which limits the efficiency and timeliness of monitoring.

[0007] Overload protection device. This type of device is used to protect electrical circuits from overload, and mainly includes air switches, leakage protectors, and overcurrent protectors. The air switch will automatically disconnect the circuit when the current exceeds a preset value (such as 6A, 10A, 16A, 20A, 32A, etc.). The leakage protector is used to detect leakage in the current, and its action value is usually set to 30mA, 100mA, etc. The overcurrent protector sets the power-off current level according to design requirements. These devices will automatically power off when the current exceeds the set value, but they cannot monitor small current changes, nor can they be used to warn and eliminate potential hidden dangers.

[0008] Intelligent monitoring system. The system realizes comprehensive monitoring of low-voltage circuits in the following ways. First, various sensors (such as current sensors, voltage sensors, and temperature sensors) are deployed in the electrical circuit to collect data in real time. The data acquisition module is responsible for acquiring data from the sensor and performing preliminary processing and storage. The monitoring platform receives the data and realizes real-time monitoring through data analysis and pattern recognition. The system issues early warnings in real time based on the analysis results, and generates detailed analysis reports to provide suggestions for fault diagnosis and maintenance. The intelligent monitoring system improves the intelligence level of monitoring through centralized data processing and analysis, and realizes comprehensive monitoring and remote control of electrical circuits.

[0009] In the existing technology, traditional manual monitoring methods and portable test instruments require engineers to operate manually on site, and cannot achieve automation and real-time monitoring, resulting in time-consuming and inefficient data collection and fault detection processes. Although the overload protection device can prevent the current from exceeding the set value, its monitoring ability for small current changes is limited, and it cannot provide early warnings or troubleshoot potential hidden dangers. Although the intelligent monitoring system provides comprehensive real-time monitoring, its information transmission and processing capabilities are still limited by traditional technologies, and lack high-sensitivity detection of small current changes under power conditions.

[0010] In view of these defects, the present invention aims to provide a low-voltage distribution network loop monitoring system based on fluxgate, which can accurately detect tiny current changes, realize automatic and real-time monitoring and early warning, and improve the accuracy of fault diagnosis and the safety of the system. Summary of the invention

[0011] In view of the problems existing in the background technology, the purpose of the present invention is to provide a low-voltage distribution network loop monitoring system based on fluxgate and its topological structure. By adopting highly sensitive fluxgate technology, it is possible to accurately detect small current changes in the low-voltage power supply loop in the live state, thereby effectively identifying faults such as leakage, short circuit, poor contact, and potential safety hazards such as line aging. Through this keen detection capability, the system not only greatly improves the accuracy and efficiency of fault detection, but also can provide early warning before the fault occurs, eliminate hidden dangers from the source, prevent risks from further deterioration, and ensure the long-term safety and stable operation of the power supply system. At the same time, the system can analyze the collected data in real time, quickly locate the fault point, greatly shorten the detection time, and ensure the safety of operation in the live state. In addition, the present invention also solves the problem of insufficient information transmission and processing capabilities in traditional equipment. Through the 4G gateway module, the detection data can be transmitted to the cloud monitoring platform in real time for comprehensive analysis and remote monitoring. The system can generate a detailed analysis report, provide users with accurate fault diagnosis information and maintenance suggestions, and significantly improve the intelligence level and safety of low-voltage circuit detection.

[0012] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0013] A low-voltage distribution network loop monitoring system based on fluxgate includes a low-voltage loop monitoring device and a cloud monitoring platform; the low-voltage loop monitoring device includes a fluxgate sensor module, a current and voltage measurement module, an acquisition controller, a power supply module and a 4G gateway module.

[0014] Furthermore, the three incoming wires of neutral, live and ground pass through the fluxgate sensor and are connected to the current and voltage measurement module.

[0015] Furthermore, the neutral, live and ground wires are contact-type magnetically coupled with the fluxgate.

[0016] Further, the current and voltage measuring modules are connected in series to the live wire and the neutral wire.

[0017] Furthermore, the acquisition controller selects STM32 or edge computing device and is installed inside or near the electrical box. The acquisition controller is connected to the current and voltage measurement module and the 4G gateway module through the serial port or I2C bus, and is connected to the power supply module to ensure its normal operation.

[0018] Furthermore, the power supply module is installed near the power access point of the system. The module converts the high voltage electricity of the live wire and the neutral wire into low voltage electricity through a step-down circuit, or adopts an independent battery power supply solution. The power supply module provides a stable power supply for the acquisition controller and related sensors. Through the step-down circuit, the module can convert 220V AC power into a working voltage suitable for the controller and sensor.

[0019] Furthermore, the 4G gateway module is located in the control center of the system and is connected to the acquisition controller via a serial communication interface. The 4G gateway module establishes a connection with the cloud monitoring platform via a wireless network.

[0020] Furthermore, the data is transmitted to the cloud platform through the 4G gateway module, and the cloud platform conducts in-depth analysis of the data to identify abnormal current or voltage fluctuations and complete remote monitoring and fault diagnosis.

[0021] Furthermore, after the sensor captures the abnormal signal, the current and voltage measurement module will measure the current and voltage parameters in the loop and pass these data to the acquisition controller. The acquisition controller performs preliminary processing on the data, such as filtering and denoising, but does not perform in-depth analysis. The processed data is uploaded to the cloud monitoring platform through the 4G gateway module.

[0022] The present invention also provides a topological structure of a low-voltage distribution network loop monitoring system based on a fluxgate, which is characterized in that by deploying monitoring devices at each key node of the power supply, hierarchical monitoring from the main power entrance to each user end is achieved. The architecture is composed of multi-level monitoring nodes, covering the main power entrance node, regional nodes, building nodes and user-end nodes. Each node is independently responsible for monitoring the power operation parameters within its coverage area, and uploading the collected data to the cloud monitoring platform through the data transmission network.

[0023] Compared with the prior art, the present invention has the following technical advantages:

[0024] (1) The present invention uses highly sensitive fluxgate sensor technology, which can detect extremely small current changes in the power circuit. This feature enables it to have significant early warning capabilities in early identification of potential faults such as leakage and poor contact. Traditional current sensors can often only detect large current fluctuations and are difficult to detect early signs of faults in a timely manner, thereby increasing hidden dangers in system operation.

[0025] (2) The present invention adopts a loop detection system topology suitable for distribution network areas, realizing real-time monitoring and early warning of nodes at all levels of the power system. Unlike the prior art that mainly relies on manual troubleshooting or single-level monitoring, the present invention can accurately locate the location of the problem and intervene before the fault spreads. This hierarchical monitoring mode not only improves the efficiency of fault handling, but also significantly reduces interference with other system parts.

[0026] (3) The present invention also integrates a cloud data analysis and remote monitoring platform, which can conduct comprehensive analysis of real-time data, generate early warning information, and support remote operation and management. This integrated solution significantly improves the intelligence level and operational reliability of the power system compared to the existing local monitoring system.

[0027] In general, the present invention is superior to the existing technologies in terms of early warning capability, fault location accuracy and intelligence level, and can effectively solve the problems of monitoring lag, inaccurate fault location and lack of remote management in the existing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the distribution network user loop monitoring system.

[0029] Figure 2 This is a schematic diagram of fluxgate current detection.

[0030] Figure 3 It is the topological structure diagram of the low-voltage circuit detection system in the distribution network area. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] The present invention proposes a low voltage distribution network loop monitoring system based on fluxgate, such as Figure 1 The system consists of two parts: low-voltage circuit monitoring device and cloud monitoring platform. Low-voltage circuit monitoring device ( Figure 1 The part marked in the dotted box) includes a fluxgate sensor module, a current and voltage measurement module, an acquisition controller, a power supply module and a 4G gateway module.

[0033] The three incoming wires of zero, fire and ground pass through the fluxgate sensor and are connected to the current and voltage measurement module. The zero, fire and ground wires are contact magnetically coupled with the fluxgate. The installation method is as follows: Figure 2 As shown. By detecting the change of current in three wires, the fluxgate sensor monitors the operating status of the circuit. The sensor should be located as close as possible to the power supply line so that the entire circuit can be monitored. The fluxgate sensor uses open-loop fluxgate technology to detect extremely small current changes in low-voltage circuits, especially when faults such as leakage and poor contact occur. Under normal circumstances, the currents of the live wire and the neutral wire are equal and opposite, and the magnetic fields cancel each other out. Once abnormalities such as leakage and insulation degradation occur, the currents of the live wire and the neutral wire are unbalanced, and the fluxgate sensor can detect the resulting tiny magnetic field differences and accurately sense abnormal conditions in the circuit. The fluxgate sensor uses the open-loop fluxgate effect to sense the magnetic field changes generated by the current and capture current fluctuations. Its high sensitivity enables it to capture subtle current fluctuations that traditional current sensors cannot detect, and is a key component for early fault warning.

[0034] The current and voltage measurement modules are connected in series to the live and neutral wires. Figure 1As shown in the annotation 2 of . This module is mainly responsible for measuring the steady-state current and voltage parameters in the low-voltage circuit, focusing on monitoring the circuit voltage drop, circuit impedance and other data, and transmitting this information to the acquisition controller in the form of analog or digital signals. By continuously monitoring the steady-state current and voltage, the module can detect abnormal conditions such as voltage fluctuations and current overload in the circuit.

[0035] The acquisition controller can choose STM32 or other edge computing devices and be installed inside or near the electrical box, such as Figure 1 As shown in the annotation 4. The acquisition controller is connected to the current and voltage measurement module and the 4G gateway module through the serial port or I2C bus, and is connected to the power supply module to ensure its normal operation. As the data processing center of the system, the acquisition controller is mainly responsible for receiving and preliminarily processing data from the fluxgate sensor and the current and voltage measurement module. The current and voltage measurement module is responsible for measuring steady-state current and voltage parameters, focusing on calculating loop voltage drop, loop impedance and other steady-state electrical characteristics. The fluxgate sensor focuses on capturing transient tiny current changes in order to detect potential faults such as leakage and poor contact. After the acquisition controller performs basic filtering and denoising on these data, it transmits the data to the cloud platform through the 4G gateway module. The cloud platform conducts in-depth analysis of the data, identifies abnormal current or voltage fluctuations, and completes remote monitoring and fault diagnosis.

[0036] The power supply module is installed near the power access point of the system. As needed, the module can convert the high voltage of the live and neutral wires into low voltage electricity through a step-down circuit, or use an independent battery power supply solution. The power supply module provides a stable power supply for the acquisition controller and related sensors. Through the step-down circuit, the module can convert 220V AC power into a working voltage suitable for the controller and sensors. If battery power is selected, the power supply module should also have a power management function to ensure that the system can still operate normally when the power is cut off.

[0037] The installation location of the 4G gateway module is as follows: Figure 1 As shown in the mark 5, it is usually located in the control center of the system. The acquisition controller is connected through the serial communication interface, and the 4G gateway module is connected to the cloud monitoring platform through the wireless network. It is responsible for transmitting the data processed by the acquisition controller to the cloud monitoring platform, ensuring stable data transmission and supporting the realization of remote monitoring and fault warning.

[0038] The cloud monitoring platform is the software part of the system and does not involve physical installation. The platform connects to the 4G gateway module through the Internet to receive and process data. The cloud monitoring platform is the advanced data analysis center of the system. It conducts a comprehensive analysis of the operating status of the low-voltage circuit by receiving data transmitted from the 4G gateway module. The platform is capable of pattern recognition and trend analysis, real-time monitoring of the health status of the electrical system, and generating fault warning reports and maintenance recommendations. The platform also supports remote viewing and management of the electrical system, improving the intelligence level of the system.

[0039] The low-voltage circuit monitoring system of the present invention adopts high-sensitivity fluxgate technology, which effectively improves the prevention capability of electrical faults. The system enhances the safety of the electrical system through real-time monitoring and early warning mechanism. The following will explain in detail the operation process of the system and its preventive effect through a specific case.

[0040] In a home electrical system, if the line is aging or the equipment is damaged, a socket may leak electricity. Traditional fault detection usually relies on obvious current fluctuations or the reaction after the equipment is damaged. This method is often delayed and difficult to warn in time, which may cause safety hazards.

[0041] When leakage occurs, the fluxgate sensor first captures the abnormal current change. The sensor is installed around the live wire, neutral wire and ground wire, and can detect the current flowing through abnormal paths (such as ground wire). Due to the extremely high sensitivity of fluxgate technology, even the smallest leakage current can be accurately sensed to ensure early detection.

[0042] After the sensor captures an abnormal signal, the current and voltage measurement module measures the current and voltage parameters in the loop and transmits these data to the acquisition controller. The acquisition controller performs preliminary processing on the data, such as filtering and denoising, but does not perform in-depth analysis. The processed data is uploaded to the cloud monitoring platform through the 4G gateway module.

[0043] After receiving the data, the cloud monitoring platform will combine historical data with the current status to conduct a comprehensive analysis of the health of the entire electrical system. For the detected leakage phenomenon, the platform generates a detailed early warning report, including the fault location, occurrence time, abnormal current value and recommended maintenance measures. To ensure timely response, the platform can also notify maintenance personnel via SMS or email to remind them to take repair actions as soon as possible.

[0044] Through the above-mentioned early detection and warning, the system can provide adequate preventive measures before leakage faults evolve into serious accidents. The early intervention mechanism effectively avoids the deterioration of potential electrical problems, reduces the risk of large-scale power outages or equipment damage, and ensures the continued safe operation of the electrical system.

[0045] The present invention also proposes a topological structure design of a low-voltage circuit detection system in a distribution network area, which realizes hierarchical monitoring from the main power entrance to each user end by deploying monitoring devices at each key node of the power supply. The architecture consists of multi-level monitoring nodes, covering the main power entrance node, sub-regional nodes, building nodes and user-end nodes. Each node is independently responsible for monitoring the power operation parameters within its coverage area, and uploads the collected data to the cloud monitoring platform through the data transmission network. This topological structure effectively realizes distributed monitoring of the power circuit and provides refined power management and fault warning functions.

[0046] First, the main entrance node is used to monitor the main power supply entrance of the substation, and is mainly responsible for monitoring the current and voltage status of the entire substation. Through this node, the stability and operation status of the overall power supply can be grasped. The monitoring node installed at the main power supply entrance of the substation helps to detect power supply anomalies of the entire system in a timely manner.

[0047] Secondly, the sub-region nodes are Figure 3 As shown in the mark 2, it is installed at the distribution box of each sub-area (such as a group or area) in the community to monitor the power situation in these areas. When the main entry node detects an abnormality, the sub-area node can further narrow the scope of the fault and accurately locate it to a specific sub-area.

[0048] Next, the building nodes are Figure 3 As shown in the mark 3, it is installed at the distribution box of each building and is responsible for monitoring the power status of the entire building. This node further refines the fault location and helps confirm whether there is power anomaly in a specific building.

[0049] Finally, the home node Figure 3 As shown in the mark 4, it is installed at the power box of each household to provide the most accurate data support for power monitoring. When the upper node detects a problem, the home node can finally confirm the specific location of the problem and realize accurate monitoring of the home power system.

[0050] Through the hierarchical monitoring system architecture, potential power problems can be identified and located, such as insulation aging, abnormal loop resistance, excessive voltage drop, load impedance change, leakage and poor contact. Although these problems do not cause power outages, they may cause more serious failures if not handled in time. The system can capture these anomalies at an early stage to help prevent possible power problems.

[0051] For example, in a sub-area of ​​a residential community, insulation degradation and abnormal circuit direct resistance appeared in the power supply circuits of some buildings. These problems did not immediately cause power outages, but they could cause increased power loss, equipment overheating, and even cause larger failures. Traditional detection methods usually have difficulty identifying these potential problems in the early stages, and they are not repaired until a failure occurs, which poses a major safety hazard.

[0052] The hierarchical monitoring system first detected that the overall power supply status of the community was normal at the main entrance node, with no major anomalies. In the sub-area nodes, the system captured a slight anomaly in the direct resistance of the circuit, suggesting that some power circuits in the area may have potential problems. This monitoring result prompted the system to further analyze the node data of each building in the sub-area.

[0053] The system then found that the insulation in the power circuits of several buildings showed signs of degradation, and the circuit voltage drop was slightly higher than normal. Comparing the data of other buildings, the source of the problem was accurately locked in the power supply lines or distribution boxes between certain buildings.

[0054] The advantage of the hierarchical monitoring system architecture is that it can detect and identify potential hidden dangers in the power system in real time without affecting normal power supply. Through hierarchical positioning, the system can not only find the sub-area where the problem is located, but also accurately lock it to the specific building or line, thereby greatly improving maintenance efficiency.

[0055] After receiving the early warning, the property management staff can quickly dispatch technicians to the specific location for inspection and maintenance to prevent the problem from expanding or causing more serious power failures. Compared with traditional regular inspections or passive processing methods, the hierarchical monitoring system achieves more proactive preventive maintenance through real-time monitoring and hierarchical positioning, effectively improving the safety and reliability of the power system.

[0056] The present invention is based on the high-sensitivity detection characteristics of the fluxgate sensor, and can accurately capture extremely small current changes in the power circuit. This detection capability is particularly suitable for hidden dangers such as leakage, poor contact, and current instability in the power system. When the current fluctuation exceeds a certain preset threshold, the system can issue a warning signal at an early stage to prevent the hidden danger from evolving into a serious electrical fault. The core innovation of this technology lies in its high-precision detection capability through the fluxgate sensor, which can detect subtle current anomalies during the normal operation of the power system and provide higher safety.

[0057] The present invention adopts a loop detection system topology suitable for distribution network areas, collects and processes monitoring data of different nodes in the power system in a hierarchical manner, and enhances the extensiveness and real-time performance of overall monitoring. The system can cover multiple voltage levels such as high, medium and low voltage, and monitor the operating status of different areas or equipment in detail. When problems such as insulation degradation and abnormal loop direct resistance occur in the circuit, the system can provide feedback to the monitoring center through a multi-level early warning mechanism at the first time, and accurately locate the specific location of the fault. Compared with the traditional single-point monitoring method, the hierarchical system has higher fault coverage and response speed, which significantly improves the safe operation level of the power system.

[0058] The present invention establishes an integrated intelligent management platform by combining the real-time data analysis and processing function with remote monitoring technology. The system can dynamically analyze the detection data in the power circuit, and perform comprehensive processing of big data through the cloud platform to generate detailed early warning reports and trend analysis. The platform not only supports real-time monitoring of local equipment, but also enables remote access and management through the Internet, greatly improving the system's operational convenience and response efficiency. The innovation of this platform lies in its integrated multi-dimensional analysis capabilities of electrical data, which can predict potential risks and assist users in taking corresponding safety precautions.

[0059] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A low-voltage distribution network loop monitoring system based on fluxgate, comprising a low-voltage loop monitoring device and a cloud monitoring platform; the low-voltage loop monitoring device comprises a fluxgate sensor module, a current and voltage measurement module, an acquisition controller, a power supply module and a 4G gateway module.

2. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: The three incoming wires of neutral, fire and ground pass through the fluxgate sensor and are connected to the current and voltage measurement module.

3. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 2 is characterized in that: The neutral, live and ground wires are contact-type magnetically coupled with the flux gate.

4. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: The current and voltage measuring modules are connected in series to the live and neutral wires.

5. The low voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: The acquisition controller selects STM32 or edge computing device and is installed inside or near the electrical box. The acquisition controller is connected to the current and voltage measurement module and the 4G gateway module through the serial port or I2C bus, and is connected to the power supply module to ensure its normal operation.

6. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: The power supply module is installed near the power access point of the system. The module converts the high voltage electricity of the live wire and the neutral wire into low voltage electricity through a step-down circuit, or adopts an independent battery power supply solution. The power supply module provides a stable power supply for the acquisition controller and related sensors. Through the step-down circuit, the module can convert 220V AC power into a working voltage suitable for the controller and sensor.

7. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: The 4G gateway module is located in the control center of the system and is connected to the acquisition controller through a serial communication interface. The 4G gateway module establishes a connection with the cloud monitoring platform through a wireless network.

8. The low-voltage distribution network loop monitoring system based on fluxgate according to claim 7 is characterized in that: The data is transmitted to the cloud platform through the 4G gateway module. The cloud platform conducts in-depth analysis of the data, identifies abnormal current or voltage fluctuations, and completes remote monitoring and fault diagnosis.

9. The low voltage distribution network loop monitoring system based on fluxgate according to claim 1 is characterized in that: After the sensor captures the abnormal signal, the current and voltage measurement module will measure the current and voltage parameters in the loop and pass these data to the acquisition controller. The acquisition controller will perform preliminary processing on the data, such as filtering and denoising, but will not perform in-depth analysis. The processed data will be uploaded to the cloud monitoring platform through the 4G gateway module.

10. A topological structure of a low-voltage distribution network loop monitoring system based on a fluxgate according to any one of claims 1 to 9, characterized in that: By deploying monitoring devices at each key node of power supply, hierarchical monitoring can be achieved from the main power entrance to each user end. The architecture consists of multi-level monitoring nodes, covering the main power entrance node, regional nodes, building nodes and user-end nodes. Each node is independently responsible for monitoring the power operation parameters within its coverage area, and uploading the collected data to the cloud monitoring platform through the data transmission network.

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