A device for precisely monitoring the passage of lightning current through an SPD

Abstract

The utility model relates to the technical field of lightning protection, and disclose a kind of device of precise monitoring lightning current through SPD process, the problem proposed in background technology is solved, it includes: current sensor, for the current change when lightning current passes through SPD is inducted, and it is converted into voltage signal output;Voltage sensor is used to measure the voltage change at the two ends of SPD, and it is converted into low voltage signal suitable for acquisition equipment processing;Data acquisition module is connected with the current sensor and voltage sensor, and the voltage signal output by sensor is collected in real time, and analog signal is converted into digital signal;Data analysis processing unit receives the digital signal transmitted by the data acquisition module, and analyzes and processes the current and voltage data collected, the utility model has the effect that lightning current through SPD process can be accurately monitored, detailed current, voltage change information and SPD performance parameter are obtained.

Description

Technical Field

[0001] This utility model belongs to the field of lightning protection technology, specifically a device for accurately monitoring the process of lightning current passing through an SPD. Background Technology

[0002] With the widespread use of modern electronic equipment, its sensitivity to lightning electromagnetic pulses is becoming increasingly higher. As a key device for protecting against lightning overvoltage and overcurrent, SPD plays an important role in protecting electrical and electronic systems from lightning damage.

[0003] However, there is currently a lack of effective real-time monitoring methods for the specific process and parameter changes of lightning current passing through SPD. It is impossible to accurately grasp information such as energy distribution and current change characteristics when lightning current passes through SPD, which is not conducive to the optimization of SPD performance and the improvement of the lightning protection safety of electrical systems. To this end, we propose a device for accurately monitoring the process of lightning current passing through SPD. Utility Model Content

[0004] To address the problems raised in the background art, this utility model provides the following technical solution: a device for accurately monitoring the process of lightning current passing through an SPD, comprising: A current sensor is used to sense the current change when lightning current passes through a surge protection device (SPD) and convert it into a voltage signal output. It employs a Rogowski coil tightly wound around the SPD's lead wire to sense the current change and convert it into a proportional voltage signal output. The Rogowski coil has advantages such as fast response speed, high accuracy, and wide bandwidth, enabling it to accurately capture rapid changes in lightning current. A voltage sensor is used to measure the voltage change across the SPD and convert it into a low voltage signal suitable for processing by the acquisition equipment. A capacitor voltage divider is selected, with one end connected to the input terminal of the SPD and the other end grounded. It is used to measure the voltage change across the SPD and convert the high voltage into a low voltage signal suitable for processing by the acquisition equipment. The data acquisition module, connected to the current sensor and voltage sensor, acquires the voltage signals output by the sensors in real time and converts the analog signals into digital signals. It has high-speed sampling capabilities, enabling real-time acquisition of the voltage signals output by the sensors and conversion of analog signals into digital signals. Its sampling frequency can meet the requirements for acquiring rapidly changing lightning currents, ensuring the integrity and accuracy of the acquired data. The data analysis and processing unit receives digital signals transmitted by the data acquisition module, analyzes and processes the acquired current and voltage data, calculates key performance parameters of the lightning current and SPD, and uses a preset algorithm to analyze and process the acquired current and voltage data. It can calculate key information such as the peak value, waveform parameters, and energy of the lightning current, and simultaneously analyze the response characteristics of the SPD under lightning current impact, such as residual voltage and conduction time. The storage module stores both the raw data collected and the processed results, facilitating subsequent retrieval, research, and comparative analysis. It can utilize high-capacity solid-state drives or cloud storage to ensure data security and long-term preservation. The display module shows in real-time various parameters and analysis results of lightning current passing through the SPD. It stores the collected raw data and the processed results for easy retrieval, research, and comparative analysis. It can utilize high-capacity solid-state drives or cloud storage to ensure data security and long-term preservation.

[0005] Preferably, the current sensor is a Rogowski coil, and the voltage sensor is a capacitive voltage divider.

[0006] Preferably, it includes the following steps: Data acquisition: When lightning current passes through the SPD, the current sensor and voltage sensor respectively acquire the current signal of the lightning current and the voltage signal across the SPD in real time, and transmit them to the data acquisition module; Signal conversion and transmission: The data acquisition module converts the acquired analog signals into digital signals and transmits them to the data analysis and processing unit; Data analysis and processing: The data analysis and processing unit filters and denoises the received digital signal, and calculates the peak value, waveform parameters, energy of the lightning current, as well as key performance indicators such as the residual voltage and conduction time of the SPD. Preferably, data storage and display: the analyzed and processed results are stored in the storage module, while the various parameters and analysis results are displayed to the user in real time through the display module.

[0007] Compared with the prior art, the beneficial effects of this utility model are: Precise monitoring: By using high-precision current and voltage sensors, combined with high-speed data acquisition and advanced data analysis algorithms, it is possible to accurately monitor the process of lightning current passing through the SPD and obtain detailed information on current and voltage changes and SPD performance parameters.

[0008] Performance evaluation: It provides reliable data for SPD performance evaluation, helps to screen out high-performance SPD products, and also provides direction for SPD research and development and improvement.

[0009] Lightning protection system optimization: By analyzing monitoring data, we can gain a deeper understanding of the operation of the lightning protection system, discover potential lightning protection hazards, and thus optimize the lightning protection system in a targeted manner to improve the lightning protection safety of the electrical system.

[0010] Real-time monitoring: The real-time display function allows users to understand the working status of the SPD in a timely manner, react quickly when lightning occurs, take necessary protective measures, and reduce the losses caused by lightning strikes. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the system structure of this utility model; Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0013] Depend on Figure 1 As provided, this utility model includes: A current sensor is used to sense the current change when lightning current passes through a surge protection device (SPD) and convert it into a voltage signal output. It employs a Rogowski coil tightly wound around the SPD's lead wire to sense the current change and convert it into a proportional voltage signal output. The Rogowski coil has advantages such as fast response speed, high accuracy, and wide bandwidth, enabling it to accurately capture rapid changes in lightning current. A voltage sensor is used to measure the voltage change across the SPD and convert it into a low voltage signal suitable for processing by the acquisition equipment. A capacitor voltage divider is selected, with one end connected to the input terminal of the SPD and the other end grounded. It is used to measure the voltage change across the SPD and convert the high voltage into a low voltage signal suitable for processing by the acquisition equipment. The data acquisition module, connected to the current sensor and voltage sensor, acquires the voltage signals output by the sensors in real time and converts the analog signals into digital signals. It has high-speed sampling capabilities, enabling real-time acquisition of the voltage signals output by the sensors and conversion of analog signals into digital signals. Its sampling frequency can meet the requirements for acquiring rapidly changing lightning currents, ensuring the integrity and accuracy of the acquired data. The data analysis and processing unit receives digital signals transmitted by the data acquisition module, analyzes and processes the acquired current and voltage data, calculates key performance parameters of the lightning current and SPD, and uses a preset algorithm to analyze and process the acquired current and voltage data. It can calculate key information such as the peak value, waveform parameters, and energy of the lightning current, and simultaneously analyze the response characteristics of the SPD under lightning current impact, such as residual voltage and conduction time. The storage module stores both the raw data collected and the processed results, facilitating subsequent retrieval, research, and comparative analysis. It can utilize high-capacity solid-state drives or cloud storage to ensure data security and long-term preservation. The display module shows in real-time various parameters and analysis results of lightning current passing through the SPD. It stores the collected raw data and the processed results for easy retrieval, research, and comparative analysis. It can utilize high-capacity solid-state drives or cloud storage to ensure data security and long-term preservation.

[0014] The current sensor is a Rogowski coil, and the voltage sensor is a capacitive voltage divider.

[0015] Includes the following steps: Data acquisition: When lightning current passes through the SPD, the current sensor and voltage sensor respectively acquire the current signal of the lightning current and the voltage signal across the SPD in real time, and transmit them to the data acquisition module; Signal conversion and transmission: The data acquisition module converts the acquired analog signals into digital signals and transmits them to the data analysis and processing unit; Data analysis and processing: The data analysis and processing unit filters and denoises the received digital signal, and calculates the peak value, waveform parameters, energy of the lightning current, as well as key performance indicators such as the residual voltage and conduction time of the SPD. Data storage and display: The analyzed results are stored in the storage module, while the parameters and analysis results are displayed to the user in real time through the display module.

[0016] Working principle: 1. System Installation and Debugging: In practical applications, the Rogowski coil of the current sensor is tightly wound around the lead of the SPD according to the specified method to ensure that it can accurately sense the lightning current. The capacitive voltage divider of the voltage sensor is correctly connected to the input terminal and ground terminal of the SPD to ensure the accuracy of voltage measurement. The parameters of the data acquisition module are set to determine the appropriate sampling frequency. Then, the entire system is debugged to check whether the connections between the components are normal and whether the data transmission is stable.

[0017] 2. Monitoring Process: Before a thunderstorm, ensure the system is in normal operating condition. When lightning current passes through the SPD, the current and voltage sensors quickly acquire signals. The data acquisition module rapidly acquires and converts signals at a set sampling frequency, transmitting them to the data analysis and processing unit. This unit processes the data according to a preset algorithm, calculates various key parameters, and stores and displays the results. For example, in an actual lightning strike, the system successfully acquired current and voltage data when lightning current passed through the SPD. After analysis and processing, key parameters were obtained, including a peak lightning current of 10kA, a wavefront time of 7.8μs, a half-wave time of 19μs, an SPD residual voltage of 1.4kV, and a conduction time of 36μs. These data provide important basis for evaluating the performance of the SPD and the effectiveness of the lightning protection system.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for accurately monitoring the process of lightning current passing through an SPD, characterized in that: include: A current sensor is used to sense the current change when lightning current passes through an SPD and convert it into a voltage signal output. A voltage sensor is used to measure the voltage change across the SPD and convert it into a low-voltage signal suitable for processing by the acquisition device. The data acquisition module is connected to the current sensor and the voltage sensor, and acquires the voltage signals output by the sensors in real time, and converts the analog signals into digital signals; The data analysis and processing unit receives the digital signals transmitted by the data acquisition module, analyzes and processes the acquired current and voltage data, and calculates the key performance parameters of the lightning current and SPD. The storage module is used to store the collected raw data and the results of analysis and processing. The display module displays various parameters and analysis results of lightning current passing through the SPD in real time.

2. The device for accurately monitoring the process of lightning current passing through an SPD according to claim 1, characterized in that: The current sensor is a Rogowski coil, and the voltage sensor is a capacitive voltage divider.

3. The device for accurately monitoring the process of lightning current passing through an SPD according to claim 2, characterized in that: Includes the following steps: Data acquisition: When lightning current passes through the SPD, the current sensor and voltage sensor respectively acquire the current signal of the lightning current and the voltage signal across the SPD in real time, and transmit them to the data acquisition module; Signal conversion and transmission: The data acquisition module converts the acquired analog signals into digital signals and transmits them to the data analysis and processing unit; Data analysis and processing: The data analysis and processing unit filters and denoises the received digital signal, and calculates the peak value, waveform parameters, energy of the lightning current, as well as the residual voltage and conduction time of the SPD; Data storage and display: The analyzed results are stored in the storage module, while the parameters and analysis results are displayed to the user in real time through the display module.

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