Overhead cable breakage monitoring system

Abstract

The embodiment of the utility model discloses an overhead cable breakage monitoring system, which is used for improving the effectiveness of overhead cable breakage monitoring. The scheme provided by the utility model comprises a cloud platform; a plurality of monitoring modules distributed on the aerial cable, wherein any monitoring module comprises a voltage sensor, a microcontroller, a communication module and a standby power supply; wherein the voltage sensor is electrically connected with an aerial cable and is used for acquiring three-phase voltage of the aerial cable; the microcontroller is in communication connection with the voltage sensor and is used for generating a disconnection judgment result corresponding to the three-phase voltage according to a preset disconnection judgment rule, and the disconnection judgment result carries information of a disconnection point position; the communication module is in communication connection with the microcontroller and is used for reporting the disconnection judgment result of the three-phase voltage to a cloud platform; the standby power supply is used for supplying power to the monitoring module under the condition that the overhead cable is powered off; and the cloud platform is used for controlling the overhead cable to be powered off according to the disconnection point positions indicated by the disconnection judgment results reported by the plurality of monitoring modules.

Description

Technical Field

[0001] This application relates to the field of power supply safety, and in particular to an overhead cable breakage monitoring system. Background Technology

[0002] Overhead cables, as an important supplementary facility for street lighting power transmission, have long faced the risk of electric shock and fire caused by cable breaks. Current methods for monitoring cable breaks rely on substation relay protection devices or manual inspections, which suffer from drawbacks such as high response delays, monitoring failure after power outages, and low location accuracy.

[0003] How to improve the effectiveness of overhead cable breakage monitoring is the technical problem that this application aims to solve. Utility Model Content

[0004] The purpose of this application is to provide an overhead cable breakage monitoring system to improve the effectiveness of overhead cable breakage monitoring.

[0005] This application provides an overhead cable breakage monitoring system, including:

[0006] Cloud platform;

[0007] Multiple monitoring modules are distributed along the overhead cable, each monitoring module including a voltage sensor, a microcontroller, a communication module, and a backup power supply; wherein,

[0008] The voltage sensor is electrically connected to the overhead cable and is used to collect the three-phase voltage of the overhead cable;

[0009] The microcontroller is communicatively connected to the voltage sensor and is used to generate a disconnection judgment result corresponding to the three-phase voltage according to a preset disconnection judgment rule. The disconnection judgment result carries information about the location of the disconnection point.

[0010] The communication module is connected to the microcontroller and is used to report the three-phase voltage disconnection determination result to the cloud platform;

[0011] The backup power supply is used to power the monitoring module in the event of a power outage of the overhead cable.

[0012] The cloud platform is used to control the power outage of the overhead cable based on the location of the disconnection point indicated by the disconnection judgment results reported by multiple monitoring modules.

[0013] Optional, also includes:

[0014] The distribution box is used to supply power to the overhead cable;

[0015] The circuit breaker is electrically connected to the overhead cable.

[0016] Optionally, the cloud platform is specifically used for:

[0017] Based on the disconnection determination results reported by multiple monitoring modules, the corresponding target circuit breaker is controlled to disconnect the power to the overhead cable. The target circuit breaker includes a circuit breaker located between the disconnection point and the distribution box.

[0018] Optionally, the target circuit breaker is located at the connection point between the distribution box and the overhead cable.

[0019] Optionally, the backup power supply includes a supercapacitor module;

[0020] The supercapacitor module is used to charge when the overhead cable is powered, and to discharge when the overhead cable is de-energized.

[0021] Optionally, the backup power supply may also include an equivalent series resistance connected in series with the supercapacitor module.

[0022] Optionally, the monitoring module is encapsulated in an aluminum housing.

[0023] Optional, also includes:

[0024] Multiple streetlights are electrically connected to the overhead cable, and the multiple streetlights are powered by the overhead cable.

[0025] Optionally, the voltage sensor includes a closed-loop Hall voltage sensor.

[0026] Optionally, the microcontroller includes the STM32H7 series microcontroller.

[0027] In this embodiment, the overhead cable breakage monitoring system includes a cloud platform and multiple monitoring modules distributed along the overhead cable. Each monitoring module can collect the three-phase voltage of the overhead cable using a voltage sensor. A microcontroller generates a breakage determination result corresponding to the three-phase voltage based on preset breakage determination rules. The breakage determination result carries information about the breakage location, and the communication module reports the breakage determination result to the cloud platform. This allows the cloud platform to control the power outage of the overhead cable based on the breakage location indicated by the breakage determination results reported by multiple monitoring modules. In the event of an overhead cable power outage, a backup power supply powers the monitoring modules, ensuring that the monitoring modules effectively perform voltage acquisition, determination, and result reporting, and ensuring that the cloud platform receives valid breakage determination results. Having the monitoring modules perform the breakage determination effectively reduces the computational load on the cloud platform and the amount of reported data, thereby improving the efficiency of overhead cable power outage execution in breakage scenarios, ensuring immediate power outage after an overhead cable breakage, and improving the power supply safety of the overhead cable. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1a This is one of the structural schematic diagrams of an overhead cable breakage monitoring system according to an embodiment of this application;

[0030] Figure 1b This is a schematic diagram of one application scenario of an overhead cable breakage monitoring system according to an embodiment of this application;

[0031] Figure 1c This is a schematic diagram of the overhead cable breakage monitoring process of an overhead cable breakage monitoring system according to an embodiment of this application;

[0032] Figure 1d This is a second schematic diagram illustrating an application scenario of an overhead cable breakage monitoring system, as described in one embodiment of this application.

[0033] Figure 2 This is a second schematic diagram of the structure of an overhead cable breakage monitoring system according to an embodiment of this application. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The drawing numbers in this application are only used to distinguish the various steps in the solution and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0035] To address the problems existing in related technologies, embodiments of this application provide an overhead cable breakage monitoring system, such as... Figure 1a As shown, it includes:

[0036] Cloud platform 11;

[0037] Multiple monitoring modules 13 are distributed along the overhead cable 12. Each monitoring module 13 includes a voltage sensor 131, a microcontroller 132, a communication module 133, and a backup power supply 134.

[0038] The voltage sensor 131 is electrically connected to the overhead cable 12 and is used to collect the three-phase voltage of the overhead cable 12;

[0039] The microcontroller 132 is communicatively connected to the voltage sensor 131 and is used to generate a disconnection judgment result corresponding to the three-phase voltage according to a preset disconnection judgment rule. The disconnection judgment result carries information about the location of the disconnection point.

[0040] The communication module 133 is communicatively connected to the microcontroller 132 and is used to report the three-phase voltage disconnection determination result to the cloud platform 11.

[0041] The backup power supply 134 is used to supply power to the monitoring module 13 when the overhead cable 12 is de-energized.

[0042] The cloud platform 11 is used to control the overhead cable 12 to disconnect the power based on the location of the disconnection point indicated by the disconnection judgment results reported by multiple monitoring modules 13.

[0043] The solutions provided in this application involve multiple technical fields such as Internet of Things technology, real-time voltage monitoring, supercapacitors, edge computing, multi-node collaborative verification, rapid power-off protection, distributed monitoring nodes, and breakpoint location.

[0044] The multiple monitoring modules in this solution can be flexibly deployed on overhead cables or on their towers, depending on the specific application scenario. Deployment density can be set based on environmental risk. For example, in open environments, one node for deploying monitoring modules can be set every 200 meters, while in high-risk areas (such as older residential areas or road crossings), the density can be increased to one node every 100 meters. The multiple monitoring modules distributed across the overhead cables in this solution can dispersedly monitor for cable breaks, effectively improving the timeliness and effectiveness of breakage monitoring.

[0045] The monitoring module includes voltage sensors that can effectively acquire the three-phase voltage of overhead cables. Optionally, a high-precision voltage sensor, such as a closed-loop Hall sensor (accuracy ±0.5%), can be used to effectively achieve high-precision real-time acquisition of three-phase voltage signals, which is beneficial for timely detection of overhead cable breaks and thus timely action.

[0046] The microcontroller in the monitoring module generates disconnection judgment results corresponding to the three-phase voltages according to preset disconnection judgment rules. These results carry information about the location of the disconnection point. This microcontroller acts as an edge computing unit in the system, performing disconnection judgments on locally acquired three-phase voltages, thereby reducing the computing load on the cloud platform and improving the overall robustness of the system's disconnection monitoring. The step of generating the disconnection judgment results according to the preset disconnection judgment rules, performed by the microcontroller, can be implemented using existing technologies.

[0047] Optionally, the microcontroller can be an integrated STM32H7 microcontroller, and the preset disconnection judgment rule can be voltage gradient sudden change detection.

[0048] The communication module in the monitoring module supports full-network cellular connectivity. Optionally, the main channel of the communication module can be 4G / 5G (Quectel BG95-M3). When sending the disconnection judgment result, alarm signals can be prioritized for transmission through 5G network slicing technology (latency ≤50ms), adapting to high-bandwidth real-time data transmission and effectively improving communication efficiency.

[0049] Optionally, the communication module can send only the disconnection determination result, indicating whether a wire is disconnected. The cloud platform then cuts off power based on the disconnection point locations indicated by the disconnection determination results reported by multiple detection modules. Alternatively, the communication module can filter the collected three-phase voltages, sending relevant voltage data indicating a disconnection along with the disconnection determination result to the cloud platform. The cloud platform can then perform further disconnection point location analysis based on the received voltage data. The communication module can compress the data before transmission to reduce the amount of data transmitted and improve data transmission efficiency.

[0050] The backup power supply in the monitoring module can be flexibly selected according to actual needs. For example, lithium batteries can be used. Although lithium batteries can provide power, they suffer from a sharp decrease in capacity at low temperatures. Alternatively, supercapacitor modules can be used, specifically 15V / 20F capacitor banks. Compared to lithium batteries, they have lower environmental requirements and can support node operation for at least 20 minutes after a power outage. When the overhead cable is supplying power normally, the supercapacitor module can draw power from the overhead cable, for example, converting AC 220V to DC 5V with an efficiency >90%, to achieve energy storage.

[0051] In this embodiment, the cloud platform communicates with multiple monitoring modules via wired or wireless means to receive disconnection determination results. In practical applications, low-power wide-area networks such as NB-IoT / LoRa or high-bandwidth 4G / 5G can be used for communication. However, in remote areas, insufficient base station coverage may lead to poor signal, potentially preventing the cloud platform from receiving disconnection determination results in a timely manner. Fiber optic transmission offers high reliability, but its deployment cost is high and it is difficult to adapt to the complex terrain of overhead lines. In the solution provided in this embodiment, the cloud platform jointly determines the location of the disconnection point based on the disconnection determination results reported by multiple monitoring modules. Even if individual monitoring modules report anomalies, the cloud platform can still cut off power to the overhead cable based on the received multiple disconnection determination results, without relying on a single point determination result, thereby improving the overall robustness of the monitoring system.

[0052] In practical applications, technicians can view relevant information about overhead cables at any time using devices with display capabilities, such as computers and mobile phones, and flexibly implement management and control according to actual needs. The relevant information about the overhead cables can be displayed on a map using a Geographic Information System (GIS), showing the location of multiple monitoring modules and the results of cable breakage assessments. For cable breakage assessments indicating abnormal three-phase voltage, the results can be highlighted using flashing or color-changing indicators, and linked to alarm information and handling progress. For cable breakage assessments indicating the location of a break, the cloud platform can control the overhead cable's power-off switch via the Modbus protocol to cut off power, thereby ensuring the safety of the broken overhead cable. In practical applications, the response time for power-off is ≤100ms, enabling immediate and effective power disconnection and immediate prevention of potential safety hazards such as fires caused by cable breaks.

[0053] Optionally, after controlling the overhead cable to cut off power at the location of the break point, the cloud platform can further implement a coordinated power cut-off to adjacent areas within a certain range around the break point, forming a power cut-off isolation zone protection, effectively preventing the fault from escalating, and thus effectively controlling the safety risks caused by the power outage within a limited area.

[0054] After a power outage is executed on the cloud platform, residual voltage may remain in the overhead cable line. This voltage value is often less than 36V. In practical applications, the residual voltage can be quickly discharged through the grounding switch of the overhead cable, thereby further reducing the risk of electric shock. In this embodiment, the steps of controlling the power outage of the overhead cable by the cloud platform based on the location of the break point indicated by the breakage judgment results reported by multiple monitoring modules can be implemented according to existing technology.

[0055] The following example will further illustrate this solution. Figure 1b This is a schematic diagram illustrating an application scenario of an embodiment of this application.

[0056] In practical applications of overhead cables, relying solely on manual inspections or centralized monitoring equipment often suffers from drawbacks such as low efficiency, long inspection times, and difficulty in timely fault detection. This is especially true in complex environments with older lines, where precise fault location is challenging. Centralized monitoring equipment typically only detects the presence of a fault across the entire line, failing to pinpoint the exact location of the break, leading to high maintenance costs, lengthy repair times, and compromised power supply reliability. Furthermore, after a cable break, the loss of power to the equipment may prevent timely transmission of fault information, resulting in a lag in the monitoring system and increasing power safety risks. Therefore, it is evident that overhead cable applications suffer from low effectiveness in detecting cable breaks.

[0057] The solution provided in this application can be applied to overhead cables supplying power to streetlights. Monitoring modules are installed at multiple key locations along the overhead cable to implement a line break alarm function. Each line break alarm has a built-in supercapacitor as a backup power source, providing temporary power after a cable break, ensuring that all functional modules within the alarm can effectively report faults. The line break alarm can detect the continuity of the entire cable in real time and actively upload alarm information to the monitoring platform upon detecting a break. The monitoring platform can perform comprehensive analysis based on the time difference and electrical parameters reported by multiple alarms, thereby accurately locating the specific section where the break occurred. For example, it can determine if the fault occurred between two light fixtures, locate the break, and then cut off power to the overhead cable at the break location, thus achieving accurate line break location and immediate elimination of safety hazards.

[0058] In addition, the monitoring platform can also perform various other control functions. The cable breakage alarm function is configured with high priority, ensuring that upon receiving an alarm signal, the monitoring platform can prioritize executing overhead cable breakage detection and immediately cut off the power supply, effectively improving the efficiency of cable breakage handling. This solution can significantly improve the accuracy and response speed of cable fault monitoring, reduce maintenance time and costs, and improve the overall reliability and safety of the power supply system.

[0059] Based on the system provided in the above embodiments, optionally, the microcontroller is specifically used for:

[0060] If, in the three-phase voltages, a single-phase voltage is lower than a preset voltage value and its duration is longer than a first preset duration, a disconnection determination result indicating a single-phase disconnection is generated; and / or,

[0061] If the voltage imbalance of the three-phase voltage is greater than a preset voltage imbalance and the duration is greater than a second preset duration, a disconnection determination result indicating multi-phase disconnection is generated.

[0062] Under normal overhead cable power supply conditions, the three-phase voltage is in a balanced state, with voltage fluctuations typically within ±10% of the rated value. If a break occurs, the three-phase voltage will exhibit different characteristics depending on the specific break. Specifically, in the case of a single-phase break, the voltage of the broken phase returns to zero. In the case of a multi-phase break, asymmetrical voltage fluctuations often occur, such as a 50% drop in voltage across two phases while the voltage of the other phase remains normal.

[0063] In the solution provided in this application embodiment, the microcontroller analyzes the collected three-phase voltages to determine the actual type of wire breakage. Specifically, a preset voltage value and a first preset duration can be set according to actual needs. The preset voltage value is, for example, 10V, and the first preset duration is, for example, 1 second. When the single-phase voltage is lower than the preset voltage value and lasts for more than 1 second, it can be determined that a single-phase wire breakage has occurred, and a wire breakage determination result indicating a single-phase wire breakage is generated.

[0064] Correspondingly, the preset voltage imbalance can be flexibly set according to actual needs. It is used to represent the degree of imbalance of the three-phase voltage. The preset voltage imbalance can be, for example, 50%, and the second preset duration can be, for example, 0.5 seconds. If the three-phase voltage imbalance is greater than 30% and the duration is greater than 0.5 seconds, it indicates that multiple phases of the three-phase voltage have been disconnected, and a disconnection judgment result indicating multiple phase disconnection is generated.

[0065] The solution provided in this application effectively avoids abnormal alarms caused by sudden phase voltage changes due to transient interference by setting a first preset duration and a second preset duration. Transformer voltage changes caused by transient interference are often recoverable, thus eliminating the need to trigger an alarm the instant an abnormal phase voltage is detected. In this solution, after the phase voltage remains abnormal for a preset duration, it can be determined that the phase voltage of the overhead cable is continuously abnormal, and the disconnection determination result can be reported to expedite disconnection procedures. This solution avoids unnecessary alarms caused by transient interference and effectively improves the overall stability of the overhead cable disconnection monitoring system.

[0066] Optionally, based on the system provided in the above embodiments, the communication module is further configured to:

[0067] If the three-phase voltage disconnection determination result indicates that the three-phase voltage is abnormal, a collaborative monitoring request is sent to the adjacent monitoring module. The collaborative monitoring request is used to instruct the adjacent monitoring module to collect the three-phase voltage of the overhead cable and send the disconnection determination result generated by the adjacent monitoring module to the monitoring module and / or the cloud platform.

[0068] In the solution provided in this application embodiment, after a monitoring module determines that the three-phase voltage is abnormal, it sends a collaborative monitoring request to the adjacent monitoring module to instruct the adjacent monitoring module to perform collaborative abnormality determination on the three-phase voltage.

[0069] The monitoring module can send collaborative monitoring requests to other monitoring modules within a certain range via broadcast methods such as WiFi. For example, the collaborative monitoring request can carry its own identifier. After receiving the collaborative monitoring request via broadcast, the surrounding monitoring modules can parse the identifier to determine whether the monitoring module that sent the collaborative monitoring request is adjacent to itself. If adjacent, it will collect the three-phase voltage of the overhead cable based on the collaborative monitoring request and generate a line break determination result.

[0070] Optionally, upon receiving a collaborative monitoring request, the monitoring module can first determine whether a disconnection determination result has already been sent within a certain time period from the current time to avoid repeatedly sending the disconnection determination result. If no disconnection determination result has been sent within a certain time period from the current time, the module will perform voltage acquisition and determination according to the collaborative monitoring request, and then generate and send the disconnection determination result.

[0071] The solution provided in this application, after the monitoring module detects an anomaly in the three-phase voltage, sends a collaborative monitoring request to adjacent monitoring modules to instruct them to collaboratively detect whether the three-phase voltage is abnormal. The disconnection determination result sent by the adjacent monitoring modules can be used by the receiving side to perform anomaly reliability determination, which is beneficial for determining the true state of the three-phase voltage and locating the disconnection.

[0072] Based on the system provided in the above embodiments, optionally, the communication module is specifically used for:

[0073] After sending a collaborative monitoring request to the adjacent monitoring module, the disconnection determination result of the adjacent monitoring module is received;

[0074] If the disconnection determination result of the adjacent monitoring module and the disconnection determination result of the three-phase voltage meet the preset consistency conditions, the disconnection determination result of the three-phase voltage will be reported to the cloud platform.

[0075] In the solution provided in this application embodiment, after the monitoring module sends a collaborative monitoring request, it receives the disconnection determination results from adjacent monitoring modules and performs a consistency determination on the disconnection determination results generated by itself and the received disconnection determination results. If the two disconnection determination results meet the preset consistency conditions, it can be determined that the local disconnection determination result is reliable, and then the verified reliable disconnection determination result is reported to the cloud platform.

[0076] In practical applications, if the two disconnection judgment results do not meet the preset consistency conditions, it indicates that there is an error in the disconnection judgment result. At this time, the three-phase voltage acquisition and disconnection judgment can be re-executed locally, and the adjacent monitoring module can be requested to make a joint judgment again until the disconnection judgment results generated by the local and adjacent monitoring modules meet the preset consistency conditions. Then, the verified and reliable disconnection judgment result is reported to the cloud platform.

[0077] The solution provided in this application performs consistency verification on the disconnection determination results generated by local and adjacent monitoring modules, and then reports the disconnection determination results to the cloud platform if the verification is reliable. This improves the effectiveness of the disconnection determination results received by the cloud platform. In addition, performing consistency verification by the monitoring module can reduce the computational complexity of the cloud platform, effectively improve the quality of the disconnection determination results through edge computing, reduce the amount of data transmitted, and improve the overall efficiency of overhead cable disconnection handling.

[0078] Optionally, the above-mentioned line breakage determination results can be reported based on 4G / 5G communication technology. In practical applications, compression methods such as the TinyML algorithm can be used to compress the voltage data, which can be compressed to 20% of the original size, effectively reducing the amount of data transmission. Specifically, for the line breakage determination results representing overhead cable breaks, 5G network slicing technology can be used to shorten the data transmission latency through high priority, enabling the cloud platform to receive the alarm instantly and execute line breakage handling as quickly as possible. In practical applications, the transmission latency can be less than or equal to 50ms.

[0079] Based on the system provided in the above embodiments, optionally, the cloud platform is specifically used for:

[0080] If the number of disconnection determination results indicating abnormality of the overhead cable received within a preset time period is greater than a preset number, the overhead cable will be de-energized based on the disconnection point location indicated by the disconnection determination results reported by multiple monitoring modules.

[0081] In the solution provided in this application embodiment, the cloud platform receives disconnection determination results reported by multiple monitoring modules. These disconnection determination results can be generated by the monitoring module autonomously collecting three-phase voltages and performing a power outage determination, or they can be generated by the monitoring module collecting three-phase voltages and performing a power outage determination based on a received collaborative monitoring request.

[0082] The preset duration and preset quantity can be flexibly set according to actual needs. For example, the preset duration can be 10 seconds and the preset quantity can be 3. If the cloud platform receives at least 3 disconnection judgment results indicating abnormal three-phase voltage within 10 seconds, it will determine the location of the disconnection point based on the disconnection judgment results and control the overhead cable to cut off power at the location of the disconnection point.

[0083] The disconnection determination result can carry information such as the identifier or geographical location of the transmitting monitoring module. The cloud platform can determine the actual three-phase voltage at the location of the monitoring module by parsing the disconnection determination result. For example, the disconnection point can be located using gradient analysis. If the disconnection determination result of the first monitoring module indicates that the three-phase voltage is normal, while the disconnection determination result of the adjacent second monitoring module indicates that the three-phase voltage is abnormal, then the location of the disconnection point can be determined to be between the first and second monitoring modules.

[0084] After determining the location of the break point, the overhead cable is de-energized at that location to ensure that the de-energized section covers the break point location, thereby guaranteeing the safety of the break point.

[0085] The solution provided in this application allows the cloud platform to determine the actual abnormality of the overhead cable by summarizing multiple disconnection determination results, thus avoiding power outage protection triggered by a single point of failure. Furthermore, based on the disconnection determination results from multiple monitoring modules, the location of the disconnection point can be efficiently determined, thereby improving the effectiveness of power outage handling.

[0086] The following example will further illustrate this solution. (See attached image.) Figure 1c The diagram shows the overhead cable breakage monitoring process.

[0087] In practical applications, overhead cable breaks can be categorized into several types, including single-phase breaks, multi-phase breaks, and PE (protective earth) breaks. In the solution provided in this application, the monitoring module, also known as a break alarm, can determine the actual break type according to preset rules by collecting voltage data and then actively upload this information to the cloud platform for real-time inspection. The cloud platform can then determine the appropriate handling measures based on the break determination results reported by the alarm. For example, in the case of single-phase or multi-phase breaks, leakage could potentially lead to fires or other dangerous events; therefore, it is crucial to quickly control the AC contactor to cut off power output, thereby reducing the voltage at the break point. In the case of PE breaks, a work order can be dispatched to technicians for prompt repair; if the three-phase voltage is not abnormal, there is no need to disconnect the overhead cable.

[0088] Optionally, after reporting the disconnection determination result to the cloud platform, the disconnection alarm can continue to monitor the changes in three-phase voltage. If no power outage is detected in the overhead cable after reporting the disconnection determination result and a certain period of time, the three-phase voltage can be collected again to check whether the overhead cable is in a disconnection state. If it is determined that the overhead cable is still in a disconnection state and has not been powered off by the cloud platform, the disconnection alarm can directly control the AC contactor to disconnect, ensuring that the overhead cable is powered off immediately in the event of a disconnection and preventing the risk of further disconnection from escalating.

[0089] After handling a line outage, the cloud platform can dispatch a work order to maintenance personnel based on the actual type of outage. Once the maintenance personnel have completed the repairs, they can send feedback to the cloud platform, indicating that the overhead cable has been restored to normal. Subsequently, the cloud platform can control the AC contactor to close, energizing the overhead cable. After energization, the cloud platform can instruct the line outage alarm to collect the three-phase voltage again and perform line outage monitoring, thereby effectively monitoring the three-phase voltage status of the overhead cable and ensuring its safety during the period from the occurrence of an outage to its restoration.

[0090] In practical applications, the actual situation of overhead cable breaks is often quite complex. Extreme weather, momentary interference, and other factors can exacerbate the risk of a break. For example, see... Figure 1d The scenario is illustrated. In this scenario, the cable break occurs first at point 1, and the broken cable can trigger breakages in adjacent sections, such as at point 2. In practical applications, if cable breaks are not addressed promptly, a chain reaction of cable breaks can occur, thus escalating the accident.

[0091] The solution provided in this application allows for the distributed deployment of monitoring nodes in complex overhead line environments, based on the level of regional risk, to achieve more accurate fault location. In areas with dense populations and complex environments, increasing the deployment density of monitoring modules improves the efficiency of reporting and handling line outages, enabling prompt line outage handling to prevent the fault from escalating.

[0092] After a wire break occurs, the overhead cable cannot supply power to the wire break alarm. For example, Figure 1d In the scenario shown, line break alarm 1 is located between the line break point and the distribution box, and may be normally powered by the overhead cable. However, line break alarm 2 is located between line break point 1 and line break point 2, and cannot be powered by the overhead cable. At this time, the power supply from the distribution box is switched to backup power, effectively realizing the reporting of line break faults. By triggering alarms simultaneously at multiple nodes, the monitoring platform accurately determines the location of the line break based on the time difference of the alarm information and electrical parameter analysis, and automatically links the circuit breaker to disconnect the corresponding circuit output, ensuring the safe operation of the power system and improving fault response efficiency.

[0093] The overhead cable breakage monitoring system provided in this application can be applied to the field of street light power supply system safety technology. Addressing the problem of insufficient response after a cable breakage, leading to electric shock risks, this solution provides a collaborative solution integrating IoT technology, real-time voltage monitoring, and backup power. The system deploys multiple intelligent monitoring nodes along the overhead line. Each node incorporates a high-precision Hall voltage sensor, a supercapacitor backup power supply, and a low-power IoT communication module, collecting line voltage data in real time and determining breakage characteristics through an edge computing unit. Employing a multi-node collaborative verification mechanism, when adjacent nodes continuously detect voltage drops or phase imbalances, the cloud platform triggers a tiered alarm and simultaneously cuts off the line power supply, effectively achieving power outage protection within 100ms after a breakage. The system uses supercapacitors to ensure continuous node operation after a breakage, and combined with 4G / 5G high-speed, low-latency communication, ensures reliable alarm signal transmission. This solution significantly improves electric shock protection efficiency, supports precise GIS location of fault points, has IP67 protection rating and self-testing functions, and is suitable for the safe operation and maintenance of street light power grids in complex environments.

[0094] Based on the system provided in the above embodiments, optionally, such as Figure 2 As shown, it also includes:

[0095] Distribution box 21 is used to supply power to the overhead cable 12;

[0096] Circuit breaker 22 is electrically connected to the overhead cable 12.

[0097] In the solution provided in this application embodiment, the overhead cable is electrically connected to the distribution box, and the distribution box supplies power to the overhead cable. The distribution box can be flexibly set according to the actual application scenario. For example, for overhead cables supplying power to streetlights, a streetlight distribution box can be set up to supply power to the overhead cable.

[0098] The circuit containing the overhead cable is also equipped with a circuit breaker, which may have a communication module to receive external commands to control its on / off state. The circuit breaker can be controlled by a cloud platform or monitoring module, or it can be controlled by technicians through other devices by sending control commands.

[0099] Optionally, multiple circuit breakers can be installed in the circuit containing the overhead cable. In practical applications, there may be situations where a single circuit breaker malfunctions and fails to disconnect the power supply normally. Using multiple circuit breakers can effectively ensure the disconnection of power supply to the overhead cable and improve the effectiveness of handling line breaks.

[0100] Based on the system provided in the above embodiments, optionally, the cloud platform is specifically used for:

[0101] Based on the disconnection determination results reported by multiple monitoring modules, the corresponding target circuit breaker is controlled to disconnect the power to the overhead cable. The target circuit breaker includes a circuit breaker located between the disconnection point and the distribution box.

[0102] In this embodiment, the cloud platform selects an appropriate target circuit breaker based on the location of the disconnection point to perform power outage control. Specifically, the cloud platform can use the disconnection point as the power outage center and select multiple circuit breakers within a preset distance as target circuit breakers for power outage. This power outage not only improves the reliability of overhead cable power outages but also facilitates the dispersed release of residual voltage, rapidly reducing contact voltage at various locations on the overhead cable and preventing the accident from escalating.

[0103] Based on the system provided in the above embodiments, optionally, the target circuit breaker is located at the connection between the distribution box and the overhead cable.

[0104] In the solution provided in this application embodiment, the power supply to the connection between the distribution box and the overhead cable is cut off based on the location of the break point, thereby cutting off the power supply to the overhead cable from the source and ensuring that the entire section of the overhead cable where the break point is located is de-energized, further reducing the risk of the accident spreading.

[0105] Optionally, the backup power supply may include a supercapacitor module, based on the system provided in the above embodiments.

[0106] The supercapacitor module is used to charge when the overhead cable is powered, and to discharge when the overhead cable is de-energized.

[0107] In the solution provided in this application embodiment, the supercapacitor module is used as a backup power source, thereby effectively supplying power to the monitoring module after an overhead cable breakage.

[0108] When the three-phase voltage of the overhead cable is normal, the supercapacitor module draws power from the overhead cable line (AC220V to DC 5V) to charge the supercapacitor. In the event of a cable break, the supercapacitor module supplies power to the monitoring module, maintaining only the core modules within the monitoring module, shutting down unnecessary loads, and extending the emergency power supply duration.

[0109] Based on the system provided in the above embodiments, optionally, the backup power supply further includes an equivalent series resistance connected in series with the supercapacitor module.

[0110] In the solution provided in this application embodiment, the supercapacitor module is also connected in series with an equivalent series resistance (ESR). The capacitor aging is predicted by the ESR value, and a maintenance alarm is triggered when the detected resistance value is greater than a preset resistance value (e.g., 200mΩ).

[0111] In this solution, the ESR value of the capacitor is detected in real time by detecting the voltage and current values ​​of ESR, so as to avoid capacitor aging and failure.

[0112] Optionally, based on the system provided in the above embodiments, the monitoring module is encapsulated in an aluminum shell.

[0113] In practical applications, if an insufficient packaging level (below IP54) is used, the monitoring module will struggle to withstand the high humidity and strong electromagnetic interference environment of overhead lines. The solution provided in this application uses an IP67 protection rating, with an aluminum shell to shield against electromagnetic interference, and an operating temperature range of -40℃ to 85℃. The metal shielding cavity effectively isolates the electromagnetic field from the high-voltage conductor. Furthermore, the transmission power can be dynamically adjusted (10dBm~23dBm) to balance signal strength and power consumption. This solution utilizes an IP67 protection rating shell and an aluminum shielding cavity design, adapting to complex and extreme environments such as high temperature, low temperature, and electromagnetic interference, and exhibits high reliability.

[0114] Optionally, the system provided in the above embodiments may also include:

[0115] Multiple streetlights are electrically connected to the overhead cable, and the multiple streetlights are powered by the overhead cable.

[0116] The solution provided in this application is applicable to outdoor lighting systems, and overhead cables can be used to power streetlights. In densely populated road traffic environments with complex circuits, the solution provided in this application can effectively monitor the safety of overhead cables through multiple monitoring modules. Once a cable breaks due to external factors such as extreme weather, the breakage determination result can be reported immediately, and power outage measures can be implemented immediately, effectively ensuring the safety of the area surrounding the breakage point and contributing to road traffic safety.

[0117] Optionally, the voltage sensor included in the system provided by the above embodiments may be a closed-loop Hall voltage sensor.

[0118] In the solution provided in this application embodiment, the monitoring module adopts a high-precision voltage sensor, specifically a closed-loop Hall voltage sensor (accuracy ±0.5%), which collects three-phase voltage signals in real time, supports a wide input range of 0-1000V, and has anti-electromagnetic interference capability.

[0119] Optionally, the microcontroller included in the system provided by the above embodiments may include an STM32H7 series microcontroller.

[0120] In the solution provided in this application embodiment, the monitoring module uses an STM32H7 microcontroller to run a local disconnection judgment algorithm (such as voltage gradient sudden change detection), reducing cloud dependence and reducing communication load.

[0121] The solution provided in this application is low-cost and highly effective, with a low overall cost per kilometer, reducing costs by 70% compared to fiber optic solutions. Furthermore, it supports plug-and-play installation in practical applications, offering flexibility and convenience. Additionally, the monitoring module can reserve RS485 / RS232 / Modbus protocol interfaces, allowing for the integration of temperature sensors and arc detection modules, upgrading to a multi-parameter monitoring system. Acquisition signal and judgment functions can be flexibly added according to actual needs.

[0122] The system provided in this application embodiment is widely applicable to fields such as intelligent lighting, power operation and maintenance, and industrial automation. It can realize real-time monitoring, rapid alarm, accurate positioning and intelligent control of cable breaks, thereby improving the safety, reliability and maintenance efficiency of the power supply system.

[0123] Data was measured on 1,000 outdoor wire breakage alarms, and the data was recorded and analyzed. In terms of function and performance, when a wire breakage occurs, the wire breakage alarm can quickly cut off power and interlock to protect the safety of the line through first-level and second-level responses, and can also accurately analyze the location of the wire breakage point.

[0124] The table below shows the average values ​​of the measured data from 1000 sets of wire breakage alarms on site:

[0125]

[0126] In this embodiment, the overhead cable breakage monitoring system includes a cloud platform and multiple monitoring modules distributed along the overhead cable. Each monitoring module can collect the three-phase voltage of the overhead cable using a voltage sensor. A microcontroller generates a breakage determination result corresponding to the three-phase voltage based on preset breakage determination rules. The breakage determination result carries information about the breakage location, and the communication module reports the breakage determination result to the cloud platform. This allows the cloud platform to control the power outage of the overhead cable based on the breakage location indicated by the breakage determination results reported by multiple monitoring modules. In the event of an overhead cable power outage, a backup power supply powers the monitoring modules, ensuring that the monitoring modules effectively perform voltage acquisition, determination, and result reporting, and ensuring that the cloud platform receives valid breakage determination results. Having the monitoring modules perform the breakage determination effectively reduces the computational load on the cloud platform and the amount of reported data, thereby improving the efficiency of overhead cable power outage execution in breakage scenarios, ensuring immediate power outage after an overhead cable breakage, and improving the power supply safety of the overhead cable.

[0127] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0129] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0130] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0131] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0132] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0133] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0134] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0135] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An overhead cable breakage monitoring system, characterized in that, include: Cloud platform; Multiple monitoring modules are distributed along the overhead cable, each monitoring module including a voltage sensor, a microcontroller, a communication module, and a backup power supply; wherein, The voltage sensor is electrically connected to the overhead cable and is used to collect the three-phase voltage of the overhead cable; The microcontroller is communicatively connected to the voltage sensor and is used to generate a disconnection judgment result corresponding to the three-phase voltage according to a preset disconnection judgment rule. The disconnection judgment result carries information about the location of the disconnection point. The communication module is connected to the microcontroller and is used to report the three-phase voltage disconnection determination result to the cloud platform; The backup power supply is used to power the monitoring module in the event of a power outage of the overhead cable. The cloud platform is used to control the power outage of the overhead cable based on the location of the disconnection point indicated by the disconnection judgment results reported by multiple monitoring modules.

2. The system as described in claim 1, characterized in that, Also includes: The distribution box is used to supply power to the overhead cable; The circuit breaker is electrically connected to the overhead cable.

3. The system as described in claim 2, characterized in that, The cloud platform is specifically used for: Based on the disconnection determination results reported by multiple monitoring modules, the corresponding target circuit breaker is controlled to disconnect the power to the overhead cable. The target circuit breaker includes a circuit breaker located between the disconnection point and the distribution box.

4. The system as described in claim 3, characterized in that, The target circuit breaker is located at the connection between the distribution box and the overhead cable.

5. The system as described in claim 1, characterized in that, The backup power supply includes a supercapacitor module; The supercapacitor module is used to charge when the overhead cable is powered, and to discharge when the overhead cable is de-energized.

6. The system as described in claim 5, characterized in that, The backup power supply also includes an equivalent series resistance connected in series with the supercapacitor module.

7. The system as described in any one of claims 1 to 6, characterized in that, The monitoring module is encapsulated in an aluminum casing.

8. The system as described in any one of claims 1 to 6, characterized in that, Also includes: Multiple streetlights are electrically connected to the overhead cable, and the multiple streetlights are powered by the overhead cable.

9. The system as described in any one of claims 1 to 6, characterized in that, The voltage sensor includes a closed-loop Hall voltage sensor.

10. The system as described in any one of claims 1 to 6, characterized in that, The microcontroller includes the STM32H7 series microcontroller.

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