Multi-scene-demand portable thunder and lightning monitor optimization method and thunder and lightning monitor

Abstract

The invention belongs to the technical field of thunder and lightning monitoring, and provides a portable thunder and lightning monitoring instrument optimization method meeting multi-scene requirements and a thunder and lightning monitoring instrument, and the protection performance of a protection circuit is improved along with the increase of thunder and lightning alarm thresholds in different scenes. The alarm threshold value is adjusted according to a monitoring scene, the alarm strategy is determined according to comparison of the alarm threshold value and a monitoring evaluation value, and the monitoring evaluation value is determined according to the current magnitude, the number of lightning strokes and the lightning stroke danger degree in the monitoring scene; a power supply mode change-over switch is arranged, and a storage battery power supply mode, a power grid power supply mode and a new energy power supply mode are switched according to the number of lightning strokes and the magnitude of current; according to different monitoring scenes, protection circuits of different forms are added to the current transformer, different alarm strategies are embedded in the alarm module, and different power supply modes are designed for the power supply module, so that the portable lightning monitor can well meet the use requirements under multiple scenes.

Description

Technical Field

[0001] This invention belongs to the field of lightning monitoring technology, and particularly relates to an optimization method for a portable lightning monitor for multiple scenarios and a lightning monitor itself. Background Technology

[0002] Portable lightning monitors include a small computer screen, network gateway, current transformer, lightning strike acquisition module, satellite positioning module, and power supply module. They are highly portable and can be quickly deployed in various complex environments, providing users with real-time and accurate lightning monitoring data.

[0003] In practical applications, portable lightning detectors are in high demand due to their portability, found in various locations including household meter boxes, substations and transmission line inspection sites, new energy power plants, field operations and emergency repair sites, lightning protection device monitoring and evaluation sites, and scientific research and data acquisition sites. However, current portable lightning detectors are primarily designed to minimize their overall size for portability. The varying intensity of lightning strikes, extreme values ​​for lightning signal acquisition, and alarm thresholds required for monitoring lightning signals in different environments mean that portable lightning detectors cannot adequately meet the needs of diverse scenarios. Furthermore, different scenarios have varying requirements for instrument circuit protection, power supply, and data transmission methods. For example, in field operations, timely wireless data transmission is not possible, further limiting the use of portable lightning detectors. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes an optimized method and a lightning monitor for various scenarios. By adding different types of protection circuits to the current transformer, embedding different alarm strategies in the alarm module, and designing different power supply modes for the power module, the portable lightning monitor effectively meets the usage requirements of multiple scenarios.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an optimization method for a portable lightning monitor that meets the needs of multiple scenarios, employing the following technical solution: An optimization method for a portable lightning monitor for multiple scenarios, wherein the portable lightning monitor includes a monitoring system, and a current transformer, an alarm module, and a power supply module connected to the monitoring system; Depending on the monitoring scenario, different forms of protection circuits are added to the current transformer, different alarm strategies are embedded in the alarm module, and different power supply modes are designed for the power supply module. Among them, the protection performance of the protection circuit is improved by increasing the lightning alarm threshold in different scenarios; the alarm threshold is adjusted according to the monitoring scenario, and the alarm strategy is determined by comparing the alarm threshold and the monitoring evaluation value, which is determined according to the current magnitude, the number of lightning strikes and the degree of lightning danger in the monitoring scenario; a power supply mode switching switch is set to switch between battery power supply mode, grid power supply mode and new energy power supply mode according to the number of lightning strikes and the current magnitude.

[0006] Furthermore, the monitoring and evaluation value is: ; ; in, , and These are the weighting coefficients; To monitor the current magnitude; The preset reference current value; This refers to the number of lightning strikes. Preset reference number of lightning strikes; The degree of danger of being struck by lightning; per unit area; To monitor a preset area within the scene; The number of people within the preset area; This represents the number of electrical devices within a preset area.

[0007] Furthermore, when monitoring substations, transmission lines, and new energy power plants, an initial alarm threshold is set; at meter boxes in residential areas and in field operations and emergency repair sites, the alarm threshold is reduced based on the initial alarm threshold; and at lightning protection device monitoring and evaluation sites and scientific research and data acquisition sites, the alarm threshold is increased based on the initial alarm threshold.

[0008] Furthermore, when monitoring at substations, transmission line inspection sites, and new energy power plants, the lightning monitor adopts a double insulation design, with the inner insulation being made of polytetrafluoroethylene and the outer insulation being made of silicone rubber skirts; in substations and rainy areas, the lightning monitor uses hydrophobic insulation materials; and in meter boxes, distribution boxes, farmland, and grasslands, the lightning monitor uses reinforced insulating sleeves.

[0009] Furthermore, the lightning monitor has a built-in lightning acquisition current transformer monitoring circuit to monitor the current transformer's operating performance in real time: when both the current transformer and the current transformer monitoring circuit input are at a preset low level, the instrument is working normally; when the current transformer output is an analog signal and the current transformer monitoring circuit input is at a low level, the instrument is working normally; when the current transformer output is at a preset low level and the current transformer monitoring circuit input is at a preset high level, the instrument is faulty, the fault type is current transformer fault, and the instrument will alarm; when the current transformer inductive reactance deviates from the initial value by more than 15%, the current transformer is faulty, the fault type is current transformer magnetomotive force drift, core magnetization, and the instrument will alarm.

[0010] Furthermore, the monitoring instrument is equipped with protection circuits: In applications such as meter boxes, distribution boxes, farmland, and grasslands, the protection circuit uses a combination of fuse + varistor + EMI filter + series mode choke + X capacitor; in applications such as substations and rainy areas, the protection circuit uses a combination of fuse + varistor + TVS transient voltage suppressor diode + EMI filter + series mode choke + X capacitor; when monitoring in substations, transmission line inspection sites, and new energy power plants, the protection circuit uses fuse + varistor + TVS transient voltage suppressor diode + ceramic gas... A combination of discharge tube + EMI electromagnetic interference filter + series mode choke + X capacitor; protection settings for lightning current acquisition current transformers: in meter boxes, distribution boxes, farmland and grassland applications, a combination of fuse + varistor + current limiting resistor is used for protection; in substations and rainy areas, a combination of fuse + varistor + TVS transient voltage suppression diode + current limiting resistor is used for protection; in high-voltage power such as substations and transmission line inspection sites and new energy power plants, a combination of fuse + varistor + TVS transient voltage suppression diode + ceramic gas discharge tube + current limiting resistor is used for protection.

[0011] Furthermore, local hard drives are set up at new energy power stations, field operations and emergency repair sites to store the monitored current data. Historical data is deleted at preset intervals, and data from the previous half month is retained when data is deleted. Local hard drives are not set up at meter boxes, substations and transmission line inspection sites, lightning protection device monitoring and evaluation sites, and scientific research and data acquisition sites.

[0012] Furthermore, the power supply of the monitor uses a double-pole triple-throw + double-pole double-throw switch for switching. The input end is connected to the power grid, new energy source and storage battery respectively, and the output end is powered by the power step-down and voltage regulation circuit inside the instrument.

[0013] Furthermore, when there is no lightning strike, the grid power supply is used; when the number of lightning strikes is greater than 3 times in 1 hour and the current is greater than 10kA, the power supply is switched to new energy wind power generation; when the number of lightning strikes is greater than 6 times in 1 hour and the current is greater than 20kA, the power supply is switched to new energy solar power generation; when the number of lightning strikes is greater than 10 times in 1 hour and the current is greater than 50kA, the power supply is switched to battery power.

[0014] To achieve the above objectives, in a second aspect, the present invention also provides a lightning monitoring instrument, which adopts the following technical solution: A lightning monitor is obtained by the portable lightning monitor optimization method for multiple scenarios described in the first aspect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the protection performance of the protection circuit is improved by increasing the lightning strike alarm threshold in different scenarios. The alarm threshold is adjusted according to the monitoring scenario, and the alarm strategy is determined by comparing the alarm threshold and the monitoring evaluation value, which is determined based on the current magnitude, the number of lightning strikes, and the degree of lightning strike hazard in the monitoring scenario. A power supply mode switching switch is set up to switch between battery power supply mode, grid power supply mode, and new energy power supply mode according to the number of lightning strikes and the current magnitude. According to different monitoring scenarios, different forms of protection circuits are added to the current transformer, different alarm strategies are embedded in the alarm module, and different power supply modes are designed for the power supply module, so that the portable lightning monitor can well meet the usage needs in multiple scenarios. Attached Figure Description

[0016] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0017] Figure 1 This is a block diagram of the optimization method of Embodiment 1 of the present invention; Figure 2 This is a basic protection circuit diagram of the protection circuit module in Embodiment 1 of the present invention; Figure 3 The following is a diagram of the enhanced protection level protection circuit of the protection circuit module in Embodiment 1 of the present invention: Figure 4 The circuit diagram of the special protection circuit module of Embodiment 1 of the present invention is as follows: Figure 5 The following is a basic protection circuit diagram for lightning acquisition input in Embodiment 1 of the present invention: Figure 6 This is a circuit diagram of the lightning acquisition input enhancement stage protection circuit of Embodiment 1 of the present invention; Figure 7This is a circuit diagram of the lightning acquisition input special protection circuit of Embodiment 1 of the present invention; Figure 8 This is a circuit diagram of the power supply mode in Embodiment 1 of the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] Example 1: Portable lightning monitors are used during substation and transmission line inspections to monitor lightning activity in real time, assess lightning strike risks, and ensure the safety of high-voltage equipment. For example, deployment around substations or along transmission line corridors can provide early warnings of potential threats to equipment during thunderstorms. In renewable energy power plants (wind and solar), wind turbine towers and solar arrays are susceptible to lightning strikes; portable lightning monitors can be flexibly deployed on top of wind turbines or in solar areas to monitor lightning current parameters and optimize lightning protection design. During field power construction or emergency repairs, temporary deployment of portable lightning monitors can provide localized lightning warnings, protecting personnel and equipment, especially in remote areas without fixed monitoring networks. During lightning protection device monitoring and evaluation, portable lightning monitors, in conjunction with fixed monitoring stations, can conduct on-site monitoring of lightning rods, grounding systems, and other lightning protection facilities to verify their effectiveness. In scientific research and data collection, portable lightning monitors can be used for lightning characteristic studies, such as the temporary collection of data on lightning strike location and intensity, to assist in improving power grid lightning protection technology.

[0021] As described in the background section, the intensity of lightning strikes, the extreme values ​​of lightning signal acquisition, and the alarm thresholds required for monitoring lightning signals vary in different usage scenarios, making portable lightning detectors unsuitable for diverse application needs. Furthermore, different scenarios have varying requirements for instrument circuit protection, power supply, and data transmission methods. For example, in field operations, timely wireless data transmission is not possible, further limiting the use of portable lightning detectors.

[0022] To address at least one of the aforementioned problems, this embodiment provides an optimization method for portable lightning monitors with multi-scenario requirements, which can optimize conventional portable lightning monitors. In one embodiment, the portable lightning monitor includes a computer screen, a network gateway, a current transformer, a positioning module, a power module, an alarm module, a local hard drive, a housing, and a monitoring system. The computer screen, the current transformer, the alarm module, and the positioning module are all connected to the monitoring system; the network gateway and wireless transmission equipment enable data exchange, protocol conversion, and wireless remote transmission after analysis by the monitoring system. The computer screen is used to display relevant data. The alarm module may include a local audible and visual alarm device, a remote alarm information sending function, and a remote telephone dialing function; the housing is the outer shell of the entire instrument and has waterproof and dustproof functions; the local hard drive is used to store data.

[0023] One optional implementation for remote alarm activation is as follows: upon detecting lightning activity or reaching alarm conditions, remote wireless transmission technology can immediately send WeChat alarm messages, SMS alarm messages, or make phone calls to the mobile phones of pre-set responsible persons and area managers. Remote mobile devices can view the data via an app; relevant personnel can view lightning monitoring data anytime, anywhere via the mobile app. The mobile app provides a convenient and quick way to understand the real-time status and historical data of lightning activity.

[0024] The current transformer can be a switchable type, capable of accurately capturing the powerful current generated during a lightning strike. The monitoring system may include a data control terminal and a processing terminal to record and analyze the collected current data in real time. The power module supplies power to all components, ensuring the instrument's operation.

[0025] like Figure 1 As shown in this embodiment, the optimization method for portable lightning monitors with multi-scenario requirements includes optimization of alarm strategies within the alarm module, optimization of insulation protection, optimization of fault prediction, optimization of circuit protection, optimization of signal transmission methods, optimization of current transformer protection, and optimization of power supply modes.

[0026] S1. Optimization of alarm strategies within the alarm module: Different alarm strategies are embedded in the alarm module according to different monitoring scenarios. Simply triggering an alarm based on whether a lightning strike occurs (alarming upon the occurrence of a lightning strike) or when the current reaches a fixed extreme value will disrupt normal operations. For example, in lightning protection device monitoring and evaluation sites, scientific research and data acquisition sites, and new energy power plants that are highly susceptible to lightning strikes, triggering an alarm upon the occurrence of a lightning strike or when the current reaches a fixed extreme value will cause the monitoring and evaluation of lightning protection devices, scientific research, and data acquisition to be suspended, affecting normal operations. Based on this, in this embodiment, the alarm threshold is adjusted according to the monitoring scenario, and the alarm strategy is determined by comparing the alarm threshold with the monitoring evaluation value, which is determined based on the current magnitude, the number of lightning strikes, and the degree of lightning strike hazard within the monitoring scenario.

[0027] Optionally, the monitoring and evaluation value is: ; in, , and These are the weighting coefficients, and the default values ​​can be selected as 0.5, 0.3, and 0.2 respectively. To monitor the current magnitude; To preset the reference current, you can select 30,000 amps; This refers to the number of lightning strikes. To preset the reference number of lightning strikes, you can select 5. The degree of danger of being struck by lightning.

[0028] When monitoring is conducted at substations, transmission line inspection sites, and new energy power plants, it is considered routine monitoring, and the alarm threshold is set as follows: When the monitoring and evaluation value Greater than the set alarm threshold This indicates a risk of lightning strike and triggers an alarm; otherwise, no alarm is triggered.

[0029] In situations involving meter boxes in residential areas and during field operations and emergency repairs, even small-scale and infrequent lightning strikes can cause injury to workers or related personnel. In such cases, lowering the alarm threshold is advisable. For example, the reduced alarm threshold. It can be reduced to other values, which can be set according to the actual situation and experience.

[0030] In lightning protection device monitoring and evaluation sites and scientific research and data acquisition sites, there is no risk of injury to staff or related personnel, nor any damage to equipment. To reflect the maximum withstand capacity of the lightning protection device, an alarm threshold can be set. For example, after adding, set the alarm threshold to It can be increased to other values, which can be set according to the actual situation and test results.

[0031] Optional, lightning strike hazard level for: ; in, Unit area, used to eliminate dimensions; To monitor a preset area within a scene, for example, the area of ​​a circle is determined with the monitoring point as the center and a preset radius; This refers to the number of staff within the preset area, or the total number of all personnel. This specifies the number of electrical devices within a predefined area, such as transformers, meter boxes, or other electrical equipment.

[0032] The magnitude of the current and the number of lightning strikes determine the potential damage caused by a lightning strike, while the degree of lightning strike hazard in the monitored scene determines the extent to which objects may be struck by lightning. In this embodiment, the monitoring evaluation value is determined based on the magnitude of the current, the number of lightning strikes, and the degree of lightning strike hazard in the monitored scene. This allows for a comprehensive consideration of the damage caused by lightning strikes to the monitored scene, improving alarm accuracy and avoiding false alarms.

[0033] S2. Optimization in insulation protection: Current transformers that collect lightning current and frequency use different insulation structures depending on the application scenario and the intensity of the lightning; the insulation structure can be set on the outer surface of the detector and other locations that require insulation.

[0034] S2.1 In high-voltage power scenarios, such as monitoring substations, transmission line inspection sites, and new energy power plants, a double insulation design (inner insulation is made of polytetrafluoroethylene, and outer insulation is made of silicone rubber sheds) is adopted, and a grounding protection circuit is added. Basis: In this scenario, the current acquisition end may come into contact with high voltage. Double insulation can withstand voltages above 10kV, and the grounding circuit can quickly discharge induced charges, preventing insulation breakdown and ensuring the safety and stability of the instrument in high-voltage environments.

[0035] S2.2, Humid Scenarios (e.g., substations, rainy areas): Use hydrophobic insulation materials (e.g., EPDM rubber) and install insulation monitoring sensors. Rationale: Humid environments easily lead to surface leakage; hydrophobic materials reduce moisture adhesion; sensors monitor insulation resistance in real time (triggering an early warning when it falls below 500MΩ), triggering an early warning before insulation performance deteriorates to a dangerous level, allowing for timely detection of potential hazards and adapting to the continuous challenges posed by humid environments to insulation.

[0036] S2.3. Outdoor open environments (such as meter boxes, distribution boxes, farmland, and grasslands): Reinforced insulating sleeves (epoxy resin with a thickness ≥ 5mm) are used, and an anti-corrosion coating is applied. Rationale: These environments are susceptible to wind, rain, and dust erosion. The coating prevents the insulation material from aging, the thickened sleeve enhances resistance to mechanical impact, and the anti-corrosion coating resists the aging and erosion of the insulation material by wind, rain, and dust, extending the service life of the insulation structure and ensuring effective insulation of the instrument in complex outdoor environments.

[0037] S3, Fault Prediction Optimization: The lightning monitor has a built-in lightning acquisition current transformer monitoring circuit to monitor the working performance of the current transformer in real time.

[0038] S3.1 When the inputs of the current transformer and the current transformer monitoring circuit are both at the preset low level, the instrument is working normally.

[0039] S3.2 When the current transformer output is an analog signal and the current transformer monitoring circuit input is low, the instrument is working normally.

[0040] S3.3 When the current transformer output is at a preset low level and the current transformer monitoring circuit input is at a preset high level, it indicates an instrument malfunction. The malfunction type is: current transformer malfunction, and the instrument will alarm.

[0041] S3.4 When the inductive reactance of the current transformer deviates from the initial value by more than 15%, it is a current transformer fault. The fault types are: current transformer magnetomotive force drift, core magnetization, and instrument alarm.

[0042] S3.5 When the mobile APP cannot access the lightning monitor, it is an instrument malfunction. Fault type: Instrument malfunction.

[0043] S4. Circuit protection optimization: To prevent damage to the instrument from high voltage surges from lightning power input, the instrument's protection circuit module uses quick-plug plugs and sockets for its input and output interfaces, allowing for rapid replacement according to different application scenarios.

[0044] S4.1, Basic protection circuit diagram of the protection circuit module: like Figure 2 As shown, in outdoor open environments (such as meter boxes, distribution boxes, farmland, grasslands), a combination of a 10A fuse, a varistor, an EMI filter, a series choke, and an X capacitor can be used. The cost is about 25 yuan, and the protection level is "basic". It can withstand short-term overvoltage surges to the power input from lightning currents below 10kA.

[0045] S4.2, Enhanced protection circuit diagram of the protection circuit module: like Figure 3 As shown, in humid environments (such as substations, rainy areas, etc.), a combination of a 10A fuse, a varistor, a TVS transient voltage suppressor diode, an EMI electromagnetic interference filter, a series mode choke, and an X capacitor is used. The cost is about 35 yuan, and the protection level is "enhanced". It can withstand a 20kA surge and suppress the overvoltage surge of the power input.

[0046] S4.3, Special Grade Protection Circuit Diagram for Protection Circuit Module: like Figure 4 As shown, when monitoring high-voltage power sources such as substations, transmission lines, and new energy power plants, a combination of a 10A fuse, a varistor, a TVS transient voltage suppressor diode, a ceramic gas discharge tube, an EMI electromagnetic interference filter, a series mode choke, and an X capacitor is used. The cost is about 50 yuan, the protection level is "special grade", it can withstand lightning currents of more than 50kA and suppress surge voltage overvoltage impacts on the power input, and has excellent impact resistance and multiple impact tolerance performance.

[0047] S5. Optimized signal transmission method: Using wireless transmission and with the help of mobile phones and other terminal devices, it is possible to understand the actual monitoring data and situation in a timely manner. However, in some scenarios, such as in new energy power plants, field operations, and emergency repair sites, there may be situations where there is no network or the network is poor. In this case, a combination of local hard drive and wireless transmission is used. Specifically, the monitored current data is saved to avoid the problem of signal transmission failure due to no network or poor network. Historical data is deleted every preset time (such as once a month) to prevent the local hard drive from becoming full. When deleting, data from the previous half month is retained to prevent data from not being transmitted and affecting the judgment of lightning strike count, etc.

[0048] In locations such as household meter boxes, substations and transmission line inspection sites, lightning protection device monitoring and evaluation sites, and scientific research and data acquisition sites, where the network is relatively stable and data can be transmitted externally in real time, the instruments do not need to be equipped with local hard drives, thus reducing costs.

[0049] S6. Current transformer protection optimization: The output interface of the lightning current acquisition current transformer adopts a quick-plug plug and socket, which can be quickly replaced according to different application scenarios.

[0050] S6.1 Lightning Input Basic Protection Circuit Diagram: like Figure 5 As shown, in outdoor open environments (such as meter boxes, distribution boxes, farmland, grasslands), a combination of a 10A fuse, a varistor, and a current-limiting resistor can be used. The cost is about 5 yuan, and the protection level is "basic". It can withstand short-term impacts of less than 10kA.

[0051] S6.2 Lightning Input Enhancement Protection Circuit Diagram: like Figure 6 As shown, in humid environments (such as substations, rainy areas, etc.), a combination of a 10A fuse, a varistor, a TVS transient voltage suppressor diode, and a current-limiting resistor is used. The cost is about 20 yuan, and the protection level is "enhanced". It can withstand a 20kA impact and suppress surge voltage.

[0052] S6.7 Lightning Input Special Protection Circuit Diagram: like Figure 7 As shown, when monitoring high-voltage power sources such as substations, transmission lines, and new energy power plants, a combination of a 10A fuse, a varistor, a TVS transient voltage suppressor diode, a ceramic gas discharge tube, and a current-limiting resistor is used. The cost is about 50 yuan, and the protection level is "special grade". It can withstand lightning current surges of more than 50kA and has excellent resistance to multiple surges.

[0053] S7, Power Supply Mode Optimization: like Figure 8 As shown, the instrument's power supply uses a double-pole triple-throw + double-pole double-throw switch as the switching core. The input terminals are connected to the power grid (AC220V), new energy sources (wind power + solar power), and a battery (DC12V). The output terminal is powered by the instrument's internal power supply step-down and voltage regulation circuit (DC12V). When the power supply is from the power grid, wind power, or solar power, relay K1 is activated, the battery power supply line is cut off, and the instrument cannot be powered. Only when none of the above three power sources are supplying power can the battery automatically power the instrument. The instrument can also automatically determine whether to switch to power grid, wind power, solar power, or battery power based on the intensity and number of lightning strikes.

[0054] Power supply mode switching conditions and basis: Grid power supply: Suitable for outdoor open environments (e.g., meter boxes, distribution boxes, farmland, grasslands), based on the low lightning intensity and stable mains power supply (e.g., meters, distribution boxes, residential areas). Grid power supply is continuous, stable, and cost-effective, meeting the long-term stable operation requirements of the instrument (e.g., real-time data transmission). New energy power supply: Suitable for moderate applications in humid environments (e.g., substations, rainy areas) or areas with frequent lightning strikes (more than 3 lightning strikes per hour with a current greater than 20kA during thunderstorms), based on the independent power supply provided by new energy sources (solar + wind power), avoiding reliance on the grid and reducing the risk of strong lightning strikes impacting the instrument's power supply. Battery power supply: When monitoring high-voltage power sources such as substations, transmission lines, and new energy power plants, if the number of lightning strikes exceeds 6 times per hour during the rainy season and the lightning current exceeds 50kA, and the risk of power grid interruption or lightning strike is very high, the system can switch to battery power supply to cut off the risk of power outage to the instrument due to the possibility of damage to the power grid and new energy power supply by lightning. In the event of power outage to the instrument due to damage to the power grid and energy power supply by lightning, the instrument will automatically switch to battery power supply to avoid power outage affecting monitoring, completely eliminate the instrument's dependence on external power source, and enable the instrument to work stably.

[0055] Specific switching logic: The instrument can be manually adjusted according to the situation, or it can automatically switch according to the speed of lightning strikes.

[0056] S7.1 When there is no lightning strike, power shall be supplied by the grid (prioritizing economic efficiency and stability).

[0057] S7.2 When the number of lightning strikes exceeds 3 times within 1 hour and the current exceeds 10kA, switch to new energy wind power generation for power supply.

[0058] S7.3 When the number of lightning strikes exceeds 6 times within 1 hour and the current exceeds 20kA, switch to new energy solar power generation for power supply.

[0059] S7.4 When the number of lightning strikes exceeds 10 times within 1 hour and the current exceeds 50kA, switch to battery power.

[0060] Example 2: This embodiment provides a lightning monitoring device, which is obtained through the optimization method of portable lightning monitoring device for multiple scenarios described in Embodiment 1.

[0061] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A portable lightning monitor optimization method for multi-scenario requirements, characterized in that, The portable lightning monitor comprises a monitoring system, a current transformer connected with the monitoring system, an alarm module and a power module; According to different monitoring scenes, different forms of protection circuits are added to the current transformer, different alarm strategies are embedded in the alarm module, and different power supply modes are designed for the power module; Wherein, with the increase of lightning strike alarm threshold in different scenes, the protection performance of the protection circuit is improved; the alarm threshold is adjusted according to the monitoring scene, the alarm strategy is determined according to the comparison of the alarm threshold and the monitoring evaluation value, and the monitoring evaluation value is determined according to the current size, the number of lightning strikes and the lightning danger degree in the monitoring scene; a power supply mode switching switch is arranged, and the switch is switched between the battery power supply mode, the power grid power supply mode and the new energy power supply mode according to the number of lightning strikes and the current size.

2. The portable lightning monitor method of claim 1, wherein, The monitoring evaluation value is: ； ； wherein, , and are weight coefficients; is a monitoring current size; is a preset reference current size; is a lightning strike number; is a preset reference lightning strike number; is a lightning strike danger degree; is a unit area; is a preset area in a monitoring scene; is a number of personnel in a preset area; is a number of power equipment in a preset area.

3. The portable lightning monitor method of claim 2, wherein, When monitoring in the substation and transmission line inspection site and new energy station, set the initial alarm threshold; when monitoring in the household meter box and outdoor operation and emergency repair site, reduce the set alarm threshold based on the initial alarm threshold; when monitoring in the lightning protection device monitoring and evaluation site and scientific research and data collection site, increase the set alarm threshold based on the initial alarm threshold.

4. The portable lightning monitor multi-scenario requirement optimization method of claim 1, wherein, When monitoring in the substation and transmission line inspection site and new energy station, the lightning monitor adopts double insulation design, the inner insulation is polytetrafluoroethylene material, and the outer insulation is silicone umbrella skirt; in the substation and rainy areas, the lightning monitor uses hydrophobic insulation material; in the meter box, distribution box, farmland and grassland, the lightning monitor uses reinforced insulation sleeve.

5. The multi-scenario requirement portable lightning monitor optimization method of claim 1, wherein, The lightning monitor has a lightning collection current transformer monitoring circuit built-in, which monitors the working performance of the current transformer in real time: when the current transformer and the current transformer monitoring circuit input are both preset low level, the instrument works normally; When the current transformer output is an analog signal and the current transformer monitoring circuit input is low level, the instrument works normally; When the current transformer output is preset low level and the current transformer monitoring circuit input is both preset high level, the instrument is faulty, the fault type is current transformer fault, and the instrument alarms; When the inductance value of the current transformer deviates from the initial value by more than 15%, the current transformer is faulty, the fault type is current transformer magnetic motive force drift, and the instrument alarms.

6. The portable lightning monitor multi-scenario requirement optimization method of claim 1, wherein, The protection circuit is arranged in the monitor: in the meter box, distribution box, farmland and grassland application scenarios, the protection circuit adopts the combination of fuse + pressure resistance + EMI electromagnetic interference filter + series mode choke coil + X capacitor; in the substation and rainy area application scenarios, the protection circuit adopts the combination of fuse + pressure resistance + TVS transient voltage suppression diode + EMI electromagnetic interference filter + series mode choke coil + X capacitor; in the substation and power transmission line inspection site and new energy station for monitoring, the protection circuit adopts the combination of fuse + pressure resistance + TVS transient voltage suppression diode + ceramic gas discharge tube + EMI electromagnetic interference filter + series mode choke coil + X capacitor; the lightning current acquisition current transformer is provided with protection: in the meter box, distribution box, farmland and grassland application scenarios, the combination of fuse + pressure resistance + current limiting resistor is adopted for protection; in the substation and rainy area scenarios, the combination of fuse + pressure resistance + TVS transient voltage suppression diode + current limiting resistor is adopted for protection; in the high-voltage power such as substation and power transmission line inspection site and new energy station for monitoring, the combination of fuse + pressure resistance + TVS transient voltage suppression diode + ceramic gas discharge tube + current limiting resistor is adopted for protection.

7. The portable lightning monitor method of claim 1, wherein, In the new energy station, field operation and emergency repair site, a local hard disk is arranged to save the monitored current data, the historical data is deleted every preset time, and when the historical data is deleted, the data of the previous half month is retained; in the household meter box, substation and power transmission line inspection site, lightning protection device monitoring and evaluation site and scientific research and data acquisition site, no local hard disk is arranged.

8. The portable lightning monitor multi-scenario requirement optimization method of claim 1, wherein, The power supply of the monitor adopts double-pole three-throw + double-pole double-throw switch as switching, the input end is connected with the power grid, new energy and storage battery respectively, and the output end is uniformly supplied to the instrument through the power supply voltage reduction and stabilization circuit in the instrument.

9. The portable lightning monitor method of claim 8, wherein, When there is no lightning strike, the power grid is used for power supply; when the lightning strike times are greater than 3 times within 1 hour and the current is greater than 10 kA, the new energy wind power generation is used for power supply; when the lightning strike times are greater than 6 times within 1 hour and the current is greater than 20 kA, the new energy solar power generation is used for power supply; when the lightning strike times are greater than 10 times within 1 hour and the current is greater than 50 kA, the storage battery is used for power supply.

10. Lightning monitor, characterized in that The portable lightning monitor optimization method for multiple scene requirements is obtained by any one of claims 1-9.

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