Low-voltage current transformer design device for self-energy-taking and self-monitoring metering

Abstract

The utility model discloses a low-voltage current transformer design device for self-energy-taking and self-monitoring metering, and the device comprises a self-monitoring module which is used for generating induced electromotive force through winding an open-circuit winding on an iron core of a current transformer, and obtaining an excitation current monitoring result; the secondary winding current monitoring module is used for arranging a voltage sensor on a secondary winding and monitoring a secondary load current monitoring result; a temperature sensor is arranged in the current transformer, and the temperature is monitored through the temperature sensor; the data communication module is used for transmitting the excitation current monitoring result, the secondary load current monitoring result and the temperature monitoring result to a terminal; the self-energy-taking module is used for inducing electromotive force generated by primary side current by winding a winding on an iron core of the current transformer; the electromotive force is converted into direct-current electric energy, and a power supply is provided for the self-monitoring module and the data communication module; and the terminal is used for detecting the abnormity of the current transformer according to the excitation current monitoring result, the secondary load current monitoring result and the temperature monitoring result.

Description

Technical Field

[0001] This utility model relates to the field of power metering technology, and more specifically, to a design device for a low-voltage current transformer for self-powered self-monitoring metering. Background Technology

[0002] With the development of smart grid technology and the increasing requirements for power metering accuracy, traditional low-voltage current transformers have some shortcomings in performance monitoring and maintenance. Existing current transformers typically rely on external power supplies and lack real-time self-monitoring capabilities, necessitating frequent manual inspections and troubleshooting by power companies in daily operations. Furthermore, traditional current transformers often only provide static metering data and cannot proactively provide information on their operating status, fault conditions, or environmental monitoring data.

[0003] Existing current transformers face technical bottlenecks in the following aspects:

[0004] 1. Lack of self-monitoring function: It is unable to detect the performance status of the current transformer in real time, and cannot detect the fault or abnormal working status of the current transformer in a timely manner.

[0005] 3. Limited data transmission: Traditional current transformers typically only provide basic metering data and cannot transmit data in real time through modern remote communication technologies, which limits their application in smart grids and remote monitoring systems.

[0006] 4. Poor environmental adaptability: Traditional current transformers may be unstable under extreme weather conditions or harsh environments, and lack sufficient resistance to shock, pressure and water and dust.

[0007] Therefore, traditional low-voltage current transformers are difficult to meet the demands of modern smart grids, remote monitoring, and increasingly stringent requirements for equipment health status. Summary of the Invention

[0008] The present invention provides a design device for a low-voltage current transformer with self-powered self-monitoring and metering functions, in order to solve the problem of how to design a low-voltage current transformer with self-powered self-monitoring and metering functions.

[0009] To address the aforementioned problems, this invention provides a design device for a self-energized, self-monitoring, and metering low-voltage current transformer, the device comprising:

[0010] The self-monitoring module is used to generate an induced electromotive force based on an open-circuit winding wound on the core of a current transformer; monitor the excitation current of the current transformer using the induced electromotive force to obtain the excitation current monitoring result; arrange a voltage sensor on the secondary winding of the current transformer to monitor the secondary load current of the current transformer and obtain the secondary load current monitoring result; and arrange a temperature sensor inside the current transformer to monitor the temperature of the current transformer and obtain the temperature monitoring result.

[0011] A data communication module is used to transmit the excitation current monitoring results, the secondary load current monitoring results, and the temperature monitoring results to a terminal via a communication module arranged in a current transformer. The communication module includes a LoRa communication module and a Bluetooth communication module.

[0012] The self-powered module is used to induce an electromotive force (EMF) generated by the primary current of a current transformer by winding a winding on the iron core of the current transformer; convert the EMF into DC power through a conversion circuit; and provide power to the self-monitoring module and the data communication module through the DC power.

[0013] The terminal is used to detect abnormalities in the current transformer based on the excitation current monitoring results, the secondary load current monitoring results, and the temperature monitoring results, and to generate detection results.

[0014] Preferably, the device further includes a protection module for encapsulating the current transformer by epoxy resin casting.

[0015] Preferably, the device further includes an interface module for seamlessly connecting the power metering equipment and the electricity consumption information collection terminal by designing wiring ports and data interfaces compatible with the power metering equipment and the electricity consumption information collection terminal in the current transformer.

[0016] Preferably, the terminal includes a cloud platform or a local data acquisition terminal.

[0017] This invention provides a design device for a self-energizing, self-monitoring, and metering low-voltage current transformer. The device includes: a self-monitoring module for generating an induced electromotive force (EMF) by winding an open-circuit winding on the core of the current transformer; monitoring the excitation current of the current transformer using the induced EMF to obtain the excitation current monitoring result; arranging a voltage sensor on the secondary winding of the current transformer to monitor the secondary load current of the current transformer and obtain the secondary load current monitoring result; arranging a temperature sensor inside the current transformer to monitor the temperature of the current transformer and obtain the temperature monitoring result; and a data communication module for... A communication module is installed in the current transformer, including a LoRa communication module and a Bluetooth communication module. This module transmits excitation current monitoring results, secondary load current monitoring results, and temperature monitoring results to a terminal. A self-powered module is used to generate an electromotive force (EMF) by inducing the primary current of the current transformer through windings wound on the transformer's core. This EMF is converted into DC power via a conversion circuit, providing power to the self-monitoring module and the data communication module. A terminal is used to detect anomalies in the current transformer based on the excitation current monitoring results, secondary load current monitoring results, and temperature monitoring results, and to generate detection results. The self-powered, self-monitoring metering low-voltage current transformer provided by this invention, through its combination of self-monitoring, self-powered, communication module, and environmental adaptability design, exhibits significant innovation and advantages. Attached Figure Description

[0018] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0019] Figure 1 This is a structural diagram of a low-voltage current transformer design device for self-powered self-monitoring and metering according to a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of a low-voltage current transformer according to a preferred embodiment of the present invention;

[0021] Figure 3 This is a structural diagram of a self-powered power supply unit according to a preferred embodiment of the present invention;

[0022] Figure 4 A structural diagram of the self-monitoring functional module according to a preferred embodiment of the present invention; and

[0023] Figure 5 This is a schematic diagram of data communication unit transmission according to a preferred embodiment of the present invention. Detailed Implementation

[0024] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0025] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0026] Figure 1 This is a structural diagram of a low-voltage current transformer design device for self-powered self-monitoring and metering according to a preferred embodiment of the present invention.

[0027] This invention provides a low-voltage current transformer for metering with self-powering and self-monitoring functions to solve the aforementioned problems in the prior art. Specific objectives are as follows:

[0028] 1. Provides self-monitoring functionality: Through an innovatively designed self-monitoring system, it can monitor parameters such as excitation current, load current, and temperature of the current transformer in real time, thereby determining whether the equipment is in normal working condition. By monitoring the equipment status, faults can be detected promptly, reducing the frequency of manual inspections and improving equipment reliability.

[0029] 2. Self-powered operation: The device is powered by a self-powered design, which uses primary current sensing to supply power to the equipment. This avoids dependence on external power sources, improves the independence of the equipment, and ensures that the current transformer can operate independently without an external power supply. It is especially suitable for locations where it is difficult to connect to a power source.

[0030] 3. Provides remote communication capabilities: By integrating communication modules such as LoRa and Bluetooth, it supports remote data transmission and enables real-time monitoring of device status. Users can access data through remote terminals, facilitating fault diagnosis and performance analysis.

[0031] 4. Improved environmental adaptability: The overall encapsulation using epoxy resin casting technology enhances the equipment's resistance to shock, pressure, water, and dust, ensuring stable operation under harsh environmental conditions and extending its service life.

[0032] 5. Compatible with existing power metering systems: This invention is designed to be compatible with existing power metering systems, requiring no changes to the wiring methods of existing electricity meters and information collection terminals, enabling seamless integration into existing power systems and reducing upgrade costs.

[0033] Through the above innovations, this invention aims to improve the monitoring capabilities, independence, reliability, and data transmission capabilities of low-voltage current transformers to meet the needs of smart grids and digital power systems.

[0034] This invention proposes a low-voltage current transformer for metering with self-powering and self-monitoring functions. This technical solution combines self-monitoring, self-powering, data communication, and environmental adaptability design. Through innovative system design and structural improvements, it fulfills the application requirements of low-voltage current transformers in smart grids and remote monitoring systems. The specific invention details are as follows:

[0035] like Figure 1 As shown, this invention provides a design device for a low-voltage current transformer for self-powered self-monitoring and metering. The device includes:

[0036] The self-monitoring module 101 is used to generate an induced electromotive force based on an open-circuit winding wound on the core of the current transformer; to monitor the excitation current of the current transformer through the induced electromotive force and obtain the excitation current monitoring result; to arrange a voltage sensor on the secondary winding of the current transformer and monitor the secondary load current of the current transformer through the voltage sensor and obtain the secondary load current monitoring result; and to arrange a temperature sensor inside the current transformer and monitor the temperature of the current transformer through the temperature sensor and obtain the temperature monitoring result.

[0037] Data communication module 102 is used to transmit excitation current monitoring results, secondary load current monitoring results, and temperature monitoring results to the terminal by arranging a communication module in the current transformer. The communication module includes a LoRa communication module and a Bluetooth communication module.

[0038] The self-powered module 103 is used to induce an electromotive force generated by the primary current of the current transformer by winding a winding on the iron core of the current transformer; convert the electromotive force into DC power through a conversion circuit; and provide power to the self-monitoring module and the data communication module through the DC power.

[0039] Terminal 104 is used to detect anomalies in the current transformer based on the excitation current monitoring results, secondary load current monitoring results, and temperature monitoring results, and to generate detection results.

[0040] Preferably, the terminal includes a cloud platform or a local data acquisition terminal.

[0041] This invention incorporates a self-monitoring function design, such as... Figure 4 As shown.

[0042] The low-voltage current transformer of this invention integrates a self-monitoring system on top of its original metering function, enabling real-time monitoring of the current transformer's performance indicators. It mainly includes:

[0043] Excitation current monitoring: An open-circuit winding is wound on the iron core of the current transformer, and the excitation current of the current transformer is monitored by inducing electromotive force. The excitation current is the current necessary for the normal operation of the current transformer and can reflect the operating status of the equipment. This invention can evaluate the operating status of the current transformer by measuring the excitation current in real time, promptly detect equipment abnormalities, and prevent measurement errors.

[0044] Secondary load current monitoring: Voltage sensors are installed on the secondary windings of the current transformer to measure changes in the secondary load current in real time. By monitoring the secondary load current, it is possible to determine whether the current transformer is operating normally and to identify problems such as overload, short circuit, or abnormal load in advance.

[0045] Temperature Monitoring: A temperature sensor is installed inside the current transformer to monitor the equipment's operating temperature. Temperature changes in the current transformer affect its performance, especially in high-temperature environments, which may lead to performance degradation or malfunction. Therefore, the temperature sensor can provide real-time temperature information of the current transformer, helping to determine the equipment's operational health.

[0046] Through the aforementioned self-monitoring function, the current transformer can achieve comprehensive monitoring of its own operating status and transmit fault information in a timely manner, thereby improving the operational reliability of the equipment.

[0047] This invention provides a self-powered design, such as... Figure 3 As shown:

[0048] The current transformer of this invention has a self-powering function, enabling it to supply power to equipment through primary-side current sensing, thus avoiding dependence on an external power source. The specific design scheme is as follows:

[0049] Inductive power conversion: Appropriate windings are installed on the iron core of the current transformer to induce an electromotive force (EMF) generated by the primary current. This EMF is then converted into AC power suitable for the operation of the current transformer through a high-efficiency energy conversion circuit (including rectification and voltage regulation modules).

[0050] Self-powered system: The self-powered system provides the necessary power for the current transformer's self-monitoring, data acquisition, and communication modules. Through the induction of the primary current, it can provide continuous power without an external power source, ensuring the equipment can operate normally under any circumstances, especially in remote areas or special situations where electricity is unavailable.

[0051] The self-powered design of this invention not only improves the independence of the current transformer, but also greatly reduces the dependence on external power supply, thereby enhancing the stability and adaptability of the equipment.

[0052] This invention provides a data communication function design, such as... Figure 5 As shown:

[0053] To meet the needs of remote data acquisition and real-time monitoring in smart grids, the current transformer of this invention integrates multiple communication modules, supporting real-time data uploading and remote monitoring. The specific design is as follows:

[0054] Multiple communication protocol support: The current transformer integrates LoRa and Bluetooth communication modules. The LoRa protocol is suitable for low-power, long-distance data transmission, making it ideal for long-distance remote monitoring; the Bluetooth module is suitable for short-range, high-speed data transmission and local configuration. This allows the current transformer to flexibly select the most suitable communication method for data transmission.

[0055] Real-time data transmission: Current transformers can upload real-time monitored data (such as excitation current, load current, temperature, etc.) to a cloud platform or local data acquisition terminal via a wireless communication module. Users can remotely view the equipment status, perform fault warnings and performance analysis, and take timely measures to prevent equipment damage.

[0056] Through data communication, the current transformer of this invention not only provides metering data, but also transmits equipment health status data, which facilitates power companies to carry out refined management and maintenance of the equipment.

[0057] Preferably, the device further includes a protection module for encapsulating the current transformer by epoxy resin casting.

[0058] This invention provides an epoxy resin casting encapsulation design. To enhance the operational stability of current transformers in harsh environments, this invention employs epoxy resin casting encapsulation technology. This encapsulation method has the following advantages:

[0059] Waterproof and dustproof: Epoxy resin encapsulation can effectively prevent external moisture, dust and other substances from entering the equipment, improving the stability of the equipment in humid and dusty environments.

[0060] Shock and pressure resistant: Epoxy resin has high mechanical strength, which can effectively protect the internal electronic components of the current transformer and prevent equipment damage caused by vibration, impact or external force.

[0061] High and low temperature resistance: Epoxy resin encapsulation also provides good temperature adaptability, ensuring that the equipment can still operate stably in extreme environments such as high temperature and low temperature.

[0062] The packaging design of this invention greatly improves the environmental adaptability of the current transformer, enabling it to work stably for a long time in various complex power equipment environments.

[0063] Preferably, the device further includes an interface module for seamless access of the power metering equipment and the electricity consumption information collection terminal by designing wiring ports and data interfaces compatible with the power metering equipment and the electricity consumption information collection terminal in the current transformer.

[0064] This invention provides a compatible design, specifically a current transformer design that considers compatibility with existing power metering systems. The design includes:

[0065] Interface standardization: The current transformer adopts wiring ports and data interfaces compatible with existing power metering equipment, ensuring that it can be seamlessly connected to traditional power metering systems and electricity information collection terminals.

[0066] Without altering existing wiring methods: The current transformer of this invention does not require changing the wiring methods of existing energy meters and information collection terminals, and can directly replace existing equipment, avoiding additional installation and debugging costs.

[0067] Through its compatible design, this invention can be easily integrated into existing power metering systems without requiring large-scale modifications to existing infrastructure, thus saving on system upgrade costs.

[0068] The self-powered and self-monitoring low-voltage current transformer for metering of this invention significantly improves the performance, reliability, and adaptability of current transformers by integrating self-monitoring, automatic power supply, communication functions, and epoxy resin encapsulation design. This technology not only meets the requirements of smart grids for high precision, high reliability, and high real-time performance of equipment, but also reduces maintenance costs and improves operation and maintenance efficiency, and has broad application prospects.

[0069] The following is a preferred embodiment of a metering low-voltage current transformer based on the self-powered self-monitoring function of the present invention. This embodiment is designed based on the needs of practical applications and aims to demonstrate how to implement the various functions of the present invention in a specific power system. The embodiment covers the implementation of the self-monitoring function, the application of the self-powered design, the transmission of data communication, and the environmental adaptability of the equipment.

[0070] 1. Implementation Environment and Application Scenarios

[0071] This invention is applicable to a wide range of electricity metering fields, especially in the following application scenarios:

[0072] Smart grid: used for high-precision power metering and remote monitoring.

[0073] Industrial power systems: Used in industrial production lines or power distribution systems to monitor current load and ensure system safety.

[0074] Remote power monitoring: Especially suitable for remote areas or locations where it is inconvenient to connect to an external power source, ensuring that metering equipment continues to work.

[0075] Energy Management System: Provides accurate current data for smart buildings or energy management systems to help optimize energy use.

[0076] 2. Overview of Implementation Examples

[0077] In this embodiment, the current transformer integrates self-monitoring, automatic power supply, and remote data communication modules to provide power companies with more efficient, accurate, and stable metering services. The specific implementation steps are as follows:

[0078] 2.1 Implementation of self-monitoring function

[0079] (1) Excitation current monitoring:

[0080] An open-circuit winding is wound on the iron core of the current transformer to induce electromotive force. This winding can monitor the excitation current in real time. When the excitation current is abnormal, such as being too high or too low, it may indicate a problem with the current transformer. By monitoring this current through a current monitoring module and comparing it with the standard range, the equipment can immediately issue an alarm signal to the user when an abnormality occurs.

[0081] (2) Secondary load current monitoring:

[0082] The secondary winding monitors the load current in real time via a voltage sensor. When the load current exceeds a set threshold, the system automatically issues a warning, indicating a possible overload or short circuit, thus helping maintenance personnel take timely preventative measures to prevent equipment damage.

[0083] (3) Temperature monitoring:

[0084] The system monitors the operating temperature of the current transformer using a built-in temperature sensor. If the temperature exceeds the safe range (e.g., 65°C), the system sends a warning message to the user, indicating a potential overheating problem or equipment malfunction. Temperature monitoring also helps assess the long-term stability of the equipment.

[0085] 2.2 Implementation of Self-Powered Design

[0086] (1) Primary side current induction power supply:

[0087] In this embodiment, the current transformer senses changes in the primary current through its iron core. The current generates an induced electromotive force (EMF) through the open-circuit winding, which is then converted into a DC power supply suitable for use by the current transformer through an energy conversion circuit (including a rectification and voltage regulation module).

[0088] (2) Power Management:

[0089] This power system boasts highly efficient energy conversion capabilities, ensuring sufficient electrical energy is extracted from the primary side current inductance to support the normal operation of the self-monitoring function and data communication module. Even in environments where power is interrupted or external power is unavailable, the current transformer can still operate stably.

[0090] 2.3 Implementation of Data Communication and Remote Monitoring Functions

[0091] (1) Communication module:

[0092] In this embodiment, the current transformer is equipped with LoRa and Bluetooth communication modules. The LoRa module is used for long-distance, low-power data transmission, which is suitable for smart grids and scenarios requiring remote data monitoring, while Bluetooth is suitable for short-range, fast configuration and data reading.

[0093] (2) Remote data acquisition and monitoring:

[0094] The equipment uploads real-time monitoring data (such as excitation current, load current, temperature, etc.) to a cloud platform or local data acquisition terminal via a communication module. Users can view the operating status of the current transformer in real time through smartphones, computers, or other terminal devices, enabling fault diagnosis, performance analysis, and maintenance decisions.

[0095] 2.4 Environmental Adaptability and Packaging Design

[0096] (1) Epoxy resin casting and encapsulation:

[0097] The current transformer in this embodiment employs epoxy resin casting integral encapsulation technology. This encapsulation design has strong waterproof, dustproof, corrosion-resistant, and shock-resistant properties, ensuring stable operation of the current transformer in harsh environments such as humidity, high temperature, low temperature, and high dust levels.

[0098] (2) Environmental adaptability assessment:

[0099] This design enables the equipment to adapt to a variety of different power equipment environments, including high-voltage substations, industrial power distribution rooms, and power facilities in remote areas, and to operate reliably under various extreme weather conditions.

[0100] 2.5 Compatible with existing power metering systems

[0101] Wiring compatibility: The current transformer in this embodiment is compatible with existing power metering systems, employing standardized wiring ports and data interfaces to ensure seamless connection with existing electricity meters and data acquisition terminals. When replacing or upgrading existing current transformers, there is no need to change the wiring and access methods of the existing power system, reducing installation costs and engineering complexity.

[0102] 3. Implementation process

[0103] (1) Current transformer installation: Install the current transformer of this invention at the power metering point or in the power distribution system. The equipment is connected to the existing power metering system using standard wiring methods.

[0104] (2) Self-monitoring initialization: After the equipment is started, it automatically begins to monitor key parameters such as excitation current, load current and temperature. All monitoring data are collected through built-in sensors.

[0105] (3) Data transmission and analysis: The current transformer uploads monitoring data to a cloud platform or local data acquisition terminal via LoRa or Bluetooth communication modules. Users can view the status of the current transformer in real time through the cloud platform, analyze current data, and identify potential faults.

[0106] (4) Self-powered operation: The current transformer provides the required power to the internal circuit through the primary side current sensing, ensuring that the equipment can work continuously independently of the external power supply and avoiding power interruption affecting the operation of the equipment.

[0107] (5) Remote fault diagnosis and maintenance: When the equipment detects an abnormality (such as overload, overheating, or fault), the system will automatically send an alarm to notify the user. Maintenance personnel can quickly locate the problem and carry out repairs or replacements through the remote control function.

[0108] 4. Implementation Results

[0109] Improved operational reliability: The self-monitoring function can provide the health status of the current transformer in real time, detect potential problems in a timely manner, avoid equipment damage and metering errors, and improve the reliability of the equipment.

[0110] Reduced operation and maintenance costs: Self-monitoring and remote communication functions reduce the frequency of manual inspections, and data analysis and fault early warning through the cloud platform effectively reduce equipment maintenance costs.

[0111] Enhancing the intelligence level of the power system: Through compatibility with the existing power metering system, current transformers can be seamlessly integrated into the existing system to achieve remote monitoring and intelligent management, thereby optimizing energy efficiency and power system management.

[0112] This invention demonstrates how to effectively apply the self-powered and self-monitoring function of this low-voltage current transformer for metering in practical power systems. Through its self-monitoring function, self-powered design, remote communication module, and reliable packaging design, this current transformer can operate stably in various harsh environments and provide efficient, reliable, and accurate current metering data for smart grids and energy management systems.

[0113] The self-powered and self-monitoring low-voltage current transformer for metering of this invention, through the integration of self-monitoring, self-powered operation, communication modules, and environmental adaptability design, possesses significant innovation and advantages. The following are the main differences and features between this invention and conventional technologies:

[0114] 1. Self-monitoring function

[0115] Traditional low-voltage current transformers typically only provide basic metering functions and cannot actively monitor their own operating status. Equipment faults are usually only detected when they occur, often relying on manual inspections for maintenance, which increases maintenance costs and response time for fault repair.

[0116] This invention integrates self-monitoring functionality, enabling real-time monitoring of key parameters of the current transformer, such as excitation current, secondary load current, and operating temperature. When a current transformer malfunctions or exhibits abnormal operation, it can provide real-time data feedback, offering early warnings of potential problems. For example, abnormal excitation current or excessively high temperature can be detected and reported promptly. These self-monitoring functions significantly improve the reliability of the current transformer, reduce the frequency of manual inspections, and enhance operational efficiency.

[0117] 2. Self-powered design

[0118] Traditional current transformers typically require an external power supply, which is a drawback of power dependence. In scenarios where power cannot be accessed (such as in remote areas) or when the external power supply is interrupted, current transformers may fail to function properly, affecting the stability and reliability of the power system.

[0119] By employing a self-powered design, this invention enables the current transformer to be powered through primary-side current sensing, avoiding dependence on an external power source. This design allows the current transformer to operate normally even without an external power supply. This self-powered solution is particularly suitable for scenarios where power is unavailable or frequently interrupted, such as remote areas and field power facilities, significantly enhancing the independence and stability of the current transformer.

[0120] 3. Data communication and remote monitoring

[0121] Traditional current transformers generally only provide local data reading functions, and data is usually read manually or transmitted through traditional communication protocols (such as RS485). They cannot achieve real-time remote data transmission and remote monitoring.

[0122] This invention integrates LoRa and Bluetooth communication modules, enabling current transformers to support remote data acquisition and real-time monitoring. The LoRa protocol allows for long-distance, low-power data transmission, while Bluetooth facilitates short-range, rapid configuration and data transmission. The current transformer can upload monitoring data (such as excitation current, load current, and temperature) to a cloud platform or local data acquisition terminal in real time, facilitating remote diagnostics and monitoring by power companies and improving the intelligence level of the power system.

[0123] 4. Environmental adaptability and reliability

[0124] Traditional current transformers typically use relatively simple packaging materials and structural designs, making them ill-suited for harsh operating environments such as humidity, dust, and extreme temperatures. These devices are prone to malfunction or performance degradation under such conditions.

[0125] This invention employs epoxy resin casting and encapsulation technology, which greatly enhances the environmental adaptability of the equipment. Epoxy resin encapsulation effectively prevents moisture, dust, and other substances from penetrating the equipment's interior, increasing its resistance to pressure, shock, corrosion, water, and dust. This ensures stable operation in high-temperature, low-temperature, humid, and dusty environments, significantly improving the equipment's reliability and service life.

[0126] 5. Compatible with existing electricity metering systems

[0127] Traditional current transformers often have a fixed design. If they need to be compatible with new smart grid systems, it is often necessary to replace the original power metering equipment or modify the wiring method, which increases the complexity and cost of upgrading and maintenance.

[0128] The current transformer design of this invention is compatible with existing power metering systems, enabling seamless integration with existing electricity meters, electricity consumption information collection terminals, and other equipment without altering existing wiring methods or operating interfaces. This design reduces the difficulty and cost of system upgrades, allowing traditional power systems to quickly incorporate smart grid functionality.

[0129] 6. Save on operation and maintenance costs

[0130] Traditional current transformers require regular manual inspection and maintenance, which is costly and often necessitates shutdown for repairs. Equipment malfunctions are frequently not detected in a timely manner, leading to metering errors and potential power losses.

[0131] This invention integrates self-monitoring and remote communication functions, enabling the device to perform real-time self-diagnosis and transmit fault data to a remote terminal. This allows maintenance personnel to monitor the device's health status in real time, avoiding frequent manual inspections, reducing maintenance costs, and enabling rapid response to device faults, minimizing downtime and improving maintenance efficiency.

[0132] Compared with traditional current transformers, the present invention has the following significant advantages:

[0133] Enhanced self-monitoring capabilities enable real-time monitoring of the current transformer's operating status, allowing for timely detection and resolution of potential problems.

[0134] The self-powered design enables the equipment to be powered independently, avoiding dependence on external power sources and improving the stability and adaptability of the equipment.

[0135] It provides remote communication capabilities, supports real-time data transmission and monitoring, and adapts to the needs of smart grids.

[0136] The advanced packaging design improves the equipment's environmental adaptability and enhances its reliability and durability.

[0137] It is compatible with existing power metering systems, facilitates integration with existing power metering equipment, and reduces upgrade costs.

[0138] Through the above innovations, this invention provides an intelligent, highly reliable, and adaptable current transformer with broad application prospects, which can effectively meet the needs of smart grids and digital power systems for high-performance power metering equipment.

[0139] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented 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. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0140] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0141] 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, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0142] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0143] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0144] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0145] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, and as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0146] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

Claims

1. A design device for a low-voltage current transformer for self-powered self-monitoring and metering, the device comprising: The self-monitoring module is used to generate an induced electromotive force based on the open-circuit winding by winding an open-circuit winding on the iron core of the current transformer. The current transformer's excitation current is monitored by the induced electromotive force to obtain the excitation current monitoring result; a voltage sensor is arranged on the secondary winding of the current transformer to monitor the secondary load current of the current transformer and obtain the secondary load current monitoring result; a temperature sensor is arranged inside the current transformer to monitor the temperature of the current transformer and obtain the temperature monitoring result. A data communication module is used to transmit the excitation current monitoring results, the secondary load current monitoring results, and the temperature monitoring results to a terminal via a communication module arranged in a current transformer. The communication module includes a LoRa communication module and a Bluetooth communication module. The self-powered module is used to induce an electromotive force (EMF) generated by the primary current of a current transformer by winding a winding on the iron core of the current transformer; convert the EMF into DC power through a conversion circuit; and provide power to the self-monitoring module and the data communication module through the DC power. The terminal is used to detect abnormalities in the current transformer based on the excitation current monitoring results, the secondary load current monitoring results, and the temperature monitoring results, and to generate detection results.

2. The apparatus according to claim 1, further comprising a protection module for encapsulating the current transformer by epoxy resin casting.

3. The apparatus according to claim 1, further comprising an interface module, used to enable seamless access of the power metering equipment and the power consumption information acquisition terminal by designing wiring ports and data interfaces compatible with the power metering equipment and the power consumption information acquisition terminal in the current transformer.

4. The device according to claim 1, wherein the terminal includes a cloud platform or a local data acquisition terminal.

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