CN111812395A - Lightning monitoring device and lightning protection device - Google Patents
Lightning monitoring device and lightning protection device Download PDFInfo
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- CN111812395A CN111812395A CN202010774007.4A CN202010774007A CN111812395A CN 111812395 A CN111812395 A CN 111812395A CN 202010774007 A CN202010774007 A CN 202010774007A CN 111812395 A CN111812395 A CN 111812395A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0842—Measurements related to lightning, e.g. measuring electric disturbances, warning systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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Abstract
The invention belongs to the technical field of lightning protection, and provides a lightning monitoring device and a lightning protection device in order to solve the technical problem that the state of the existing lightning protection element is lack of monitoring before being damaged, wherein the lightning monitoring device comprises: the overvoltage monitoring module is provided with a rectifying circuit, a filter circuit and a voltage follower circuit; the current monitoring sensor is used for detecting a direct current signal of the surge protection element corresponding to the circuit to be monitored; the controller is used for judging whether the circuit is abnormal or not, and the controller receives an electric signal of the circuit to be monitored input by the voltage following circuit and an electric signal input by the current monitoring sensor; the controller is used for judging whether the voltage of the circuit to be monitored is abnormal or not and whether the surge protection element is abnormal or not. Therefore, based on the monitoring information of the controller, the protection element for lightning protection can be replaced before the service life of the protection element is about to be exhausted; thereby avoiding influencing the normal use of the lightning protection device.
Description
Technical Field
The invention relates to the technical field of lightning protection, in particular to a lightning monitoring device and a lightning protection device.
Background
The lightning protection box is lightning protection equipment and is mainly installed at a power supply inlet wire of equipment which is easy to be struck by lightning for a power distribution room, a power distribution cabinet, an alternating current distribution panel, a switch box and other important equipment so as to protect the equipment from being damaged by lightning overvoltage invading along a power supply circuit.
The lightning protection box module is composed of a voltage switch type module and a voltage limiting type module (or an integrated MOV). The lightning protection device is mainly installed at the power inlet wire of a power distribution room, a power distribution cabinet, an alternating current distribution panel, a switch box and other important equipment and equipment easy to be struck by lightning so as to protect the equipment from being damaged by lightning overvoltage invading along a power line; the method can be widely applied to the main power protection of systems such as communication, electric power, traffic, finance, railway, civil aviation and the like.
For example, the chinese patent application No. CN201721779020.9 discloses a state indicating circuit for a lightning protection box, which can accurately indicate the state of damage of a protection element in a plurality of parallel protection elements, and perform different information indications on different states (all good, partially damaged, and all damaged); and the lightning protection module can be realized through a mechanical structure, so that the lightning protection module is simple in structure and low in realization cost, and cannot generate electric signal interference on the lightning protection module.
However, the inventor finds that the state indicating circuit for the lightning protection box can give an indication when the protection element is damaged in the process of realizing the invention; it would be highly desirable to provide a method for monitoring the state of a lightning protection component before it is damaged (e.g., the magnitude of a lightning strike, the remaining life, etc.) so that the component can be replaced in advance before it is completely damaged if the life of the component is exhausted after the lightning strike.
Disclosure of Invention
In order to solve the technical problem that the state of the existing lightning protection element is lack of monitoring before being damaged, the invention provides a lightning monitoring device and a lightning protection device, wherein the lightning monitoring device has the functions of lightning stroke amplitude monitoring and service life calculation to the greatest extent; thus, after the lightning protection element is struck by lightning, the state before the service life is over can be ready to be monitored, and based on the monitoring state, the lightning protection element can be replaced before the service life is over; thereby avoiding influencing the normal use of the lightning protection device.
In order to achieve the above object, the technical solution provided by the present invention comprises:
the invention provides a lightning monitoring device, which is characterized by comprising:
the overvoltage monitoring module is provided with a rectifying circuit, a filter circuit and a voltage follower circuit; when the circuit to be monitored receives lightning stroke, the rectifying circuit rectifies and divides the voltage of an electric signal acquired in the circuit to be monitored and transmits the electric signal to the filter circuit; the filter circuit converts the rectified and voltage-divided electric signal into direct-current voltage and inputs the direct-current voltage to the voltage follower circuit;
the current monitoring sensor is used for detecting a direct current signal of the surge protection element corresponding to the circuit to be monitored;
the controller is used for judging whether the circuit is abnormal or not, and the controller receives an electric signal of the circuit to be monitored input by the voltage following circuit and an electric signal input by the current monitoring sensor; the controller calculates the voltage value of the alternating current according to the electric signal transmitted by the voltage following circuit, and judges whether the voltage of the circuit to be monitored is abnormal or not based on the voltage value of the alternating current; and the controller calculates the direct current signal of the surge protection element corresponding to the circuit to be monitored according to the electric signal input by the current monitoring sensor, and judges whether the surge protection element corresponding to the circuit to be monitored is abnormal or not based on the direct current signal.
In a preferred embodiment of the present invention, when a fault occurs in a line in a circuit to be monitored, the voltage in the circuit to be monitored is abnormal; the voltage monitoring circuit acquires the abnormal voltage signal, converts the abnormal voltage signal into a corresponding abnormal direct current signal and inputs the abnormal direct current signal into the controller; the controller outputs information representing voltage abnormality of the alternating current based on the abnormal direct current signal.
In a preferred embodiment of the present invention, when the circuit to be monitored, which is monitored by the lightning monitoring device, is a multi-phase circuit, the overvoltage monitoring module is respectively disposed in each phase circuit.
In a preferred embodiment of the present invention, the current monitoring sensor is a non-contact sensor, and when an alternating current passes through the current monitoring sensor, the current monitoring sensor converts the measured alternating current leakage current into a voltage or current signal which is proportionally output according to the principle of magnetic flux electromagnetic induction.
In a preferred embodiment of the present invention, the lightning monitoring device further comprises a lightning stroke amplitude sensor, when a lightning current passes through the lightning stroke amplitude sensor, the lightning stroke amplitude sensor senses a transient magnetic flux of the lightning current, and the transient magnetic flux causes an induced electromotive force to be generated in an inductor in the current monitoring sensor; the magnitude of the lightning current can be obtained based on the induced electromotive force.
In a further preferred embodiment of the present invention, the present invention further includes a voltage peak value holder connected to the current monitoring sensor, the voltage peak value holder is provided with an MOS transistor, and a voltage corresponding to an electromotive force output by the current monitoring sensor is transmitted into the MOS transistor; when a surge is monitored, the voltage peak value conserver maintains the voltage peak value, and the voltage follower of the later stage outputs the voltage peak value to the controller.
In a further preferred embodiment of the present invention, the controller calculates the lightning current peak value based on a voltage value input from the voltage follower after the voltage peak value holder according to a predetermined voltage-current numerical relationship.
In a further preferred embodiment of the present invention, the lightning monitoring device further includes a rectifier bridge for receiving the voltage corresponding to the electromotive force, and an optical coupling circuit connected to the rectifier bridge; after the voltage corresponding to the electromotive force is rectified, a direct current pulse signal is formed and input to the optical coupling circuit, and then is transmitted to a port of the controller; therefore, a pulse signal is formed at the port of the controller, an RTC module and a storage module which are associated with the pulse signal are arranged in the controller, the user of the RTC module acquires the duration and the times of lightning stroke, and the storage module is used for storing the duration and the times of the lightning stroke.
In a preferred embodiment of the present invention, the lightning monitoring device further includes a network communication circuit, the network communication circuit includes a communication processor connected to the controller, and the communication processor is connected to an external network server; the signal of the communication processor is arranged to: and when the external network server receives whether the voltage of the circuit to be monitored transmitted by the communication processor is abnormal and/or whether a surge protection element corresponding to the circuit to be monitored is abnormal, the external network server sends abnormal information to the user terminal.
In another aspect, the present invention provides a lightning protection device, including:
a surge protector provided with a lightning protection element; and
a lightning monitoring device connected to the surge protector device, the lightning monitoring device being any one of the lightning monitoring devices as provided in the first aspect.
By adopting the scheme provided by the invention, the overvoltage monitoring module can be used for monitoring the voltage abnormal information in the circuit to be monitored in time, and the current monitoring sensor can be used for monitoring the direct current signal of the surge protection element corresponding to the circuit to be monitored; therefore, even if the circuit to be monitored is not damaged, the abnormal voltage and/or the service life of the surge protection element are about to be used up, the circuit to be monitored can be monitored; therefore, an abnormal signal can be output through the controller to remind a user of replacing the electronic device in time; without waiting for the line to be abnormally disconnected and replaced. Because the user can obtain the abnormal information of the circuits, the modules which do not meet the requirements in the circuits can be maintained or replaced in advance, and the influence on the normal use of the lightning protection device can be further avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure and/or process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a block diagram of a lightning protection device according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a partial circuit of an overvoltage monitoring module in a lightning monitoring device according to an embodiment of the present invention.
Fig. 3 is a circuit diagram illustrating another portion of an overvoltage monitoring module in a lightning monitoring device according to an embodiment of the present invention connected to a portion of the overvoltage monitoring module in fig. 2.
Fig. 4 is a schematic partial circuit diagram of an overvoltage monitoring module in another lightning monitoring device according to an embodiment of the invention.
FIG. 5 is a schematic circuit diagram of a portion of the overvoltage monitoring module shown in FIG. 4 in another lightning monitoring device according to an embodiment of the invention.
FIG. 6 is a schematic circuit diagram of a portion of the overvoltage monitoring module shown in FIG. 4 in another lightning monitoring device according to an embodiment of the invention.
FIG. 7 is a schematic diagram of a lightning stroke amplitude sensor in a lightning monitoring device according to an embodiment of the invention.
Fig. 8 is a schematic diagram of lightning stroke amplitude detection in a lightning monitoring device according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of lightning strike detection in a lightning monitoring device according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that the detailed description is only for the purpose of making the invention easier and clearer for those skilled in the art, and is not intended to be a limiting explanation of the invention; moreover, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the drawings may be performed in a control system such as a set of controller-executable instructions and, although a logical ordering is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than that illustrated herein.
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
In order to solve the technical problem that the state of the existing lightning protection element is lack of monitoring before being damaged, the invention provides a lightning monitoring device and a lightning protection device, wherein the lightning monitoring device has the functions of lightning stroke amplitude monitoring and service life calculation to the greatest extent; thus, after the lightning protection element is struck by lightning, the state before the service life is over can be ready to be monitored, and based on the monitoring state, the lightning protection element can be replaced before the service life is over; thereby avoiding influencing the normal use of the lightning protection device. Specifically, the method comprises the following steps:
as shown in fig. 1, the present embodiment provides a lightning protection apparatus 300, the lightning protection apparatus 300 including:
the surge protector 200 provided with the lightning protection element 210, a specific interface of the surge protector 200 in this embodiment may be a pluggable module as mentioned in chinese patent CN201010019307.8, or cn201921419522.x, or cn200810088691.x, and as an optional manner, a plurality of same piezoresistors may be arranged in parallel on the basis of the existing patent to form a lightning protection circuit. The specific model and specification of the piezoresistor provided by the embodiment can be determined by combining the specific application scene of the surge protection device; the surge protector 200 provided in this embodiment may also be provided with a base for mounting a pluggable module, similar to the above patent; the present embodiment does not specifically limit these.
The lightning protection device 300 further comprises a lightning monitoring device 100 connected to the surge protector device 200, for example, by the surge protection element 210 in the lightning monitoring device 100 and the current detection sensor 120 in the surge protector device 200; it should be noted that "connection" herein is an electrical connection, and is not limited to a physical connection.
As shown in fig. 1, the lightning monitoring device 100 includes:
an overvoltage monitoring module 110 provided with a rectifying circuit 112, a filter circuit 114, and a voltage follower circuit 116; when the circuit to be monitored receives a lightning strike, the rectifying circuit 112 rectifies and divides (for example, converts alternating current into direct current and/or reduces voltage) the electric signal obtained from the circuit to be monitored, and then transmits the electric signal to the filtering circuit 114; the filter circuit 114 converts the rectified and divided electrical signal into a dc voltage, and inputs the dc voltage to the voltage follower circuit 116;
a current monitoring sensor 120 for detecting a dc signal of the surge protection element corresponding to the circuit to be monitored;
a controller 130 for determining whether the circuit is abnormal, wherein the controller 130 receives the electric signal of the circuit to be monitored input from the voltage follower circuit 116 and the electric signal input from the current monitoring sensor 120; the controller 130 calculates the voltage value of the alternating current in the circuit to be monitored according to the electric signal transmitted by the voltage follower circuit 116, and judges whether the voltage of the circuit to be monitored is abnormal or not based on the voltage value of the alternating current; the controller 130 calculates a dc signal of the surge protection element 210 corresponding to the circuit to be monitored from the electric signal input from the current monitoring sensor 120, and determines whether the surge protection element 210 corresponding to the circuit to be monitored is abnormal based on the dc signal.
Therefore, by adopting the above scheme provided by this embodiment, the overvoltage monitoring module can be used to monitor the voltage abnormal information in the circuit to be monitored in time, and the current monitoring sensor can be used to monitor the dc signal of the surge protection element corresponding to the circuit to be monitored; therefore, even if the circuit to be monitored is not damaged, the abnormal voltage and/or the service life of the surge protection element are about to be used up, the circuit to be monitored can be monitored; therefore, an abnormal signal can be output through the controller to remind a user of replacing the electronic device in time; without waiting for the line to be abnormally disconnected and replaced. Because the user can obtain the abnormal information of the circuits, the modules which do not meet the requirements in the circuits can be maintained or replaced in advance, and the influence on the normal use of the lightning protection device can be further avoided.
Fig. 2 and 3 are schematic diagrams illustrating overvoltage detection performed on a single-phase circuit according to the present embodiment, fig. 2 is a schematic diagram illustrating a partial circuit of an overvoltage monitoring module in a lightning monitoring device according to the present embodiment, and fig. 3 is a schematic diagram illustrating a circuit in which another portion of the overvoltage monitoring module in the lightning monitoring device is connected to the partial overvoltage monitoring module in fig. 2 according to the present embodiment. Specifically, alternating current in a circuit to be monitored is firstly input into decoupling resistors R12 and R13 (used for preventing lightning stroke), then rectified and divided, after further filtering and voltage stabilizing of a capacitor inductor, direct current voltage is sent into a voltage follower made of an integrated operational amplifier to enable the voltage to be more stable and form isolation, then a voltage signal is sent into an AD pin of a controller (for example, a model is an STM32 singlechip), and the controller is enabled to calculate an alternating current voltage value through the proportion of a direct current and an alternating current effective value; thus, the controller has the capability of monitoring the alternating voltage in real time; when overvoltage occurs on a circuit in the circuit to be monitored, the controller detects that the voltage value is abnormal, and then the controller can record and give an alarm to a user.
In a preferred embodiment of this embodiment, when the circuit to be monitored, which is monitored by the lightning monitoring device, is a multi-phase circuit, each phase circuit is provided with an overvoltage monitoring module. For example, fig. 4, fig. 5, and fig. 6 are schematic diagrams of performing overvoltage detection on a multi-phase circuit according to the present embodiment, fig. 4 is a schematic diagram of a partial circuit of an overvoltage monitoring module in another lightning monitoring device according to the present embodiment, fig. 5 is a schematic diagram of a circuit of a partial overvoltage monitoring module in another lightning monitoring device according to the present embodiment, which is connected to the partial overvoltage monitoring module in fig. 4, and fig. 6 is a schematic diagram of a circuit of a partial overvoltage monitoring module in another lightning monitoring device according to the present embodiment, which is connected to the partial overvoltage monitoring module in fig. 4; fig. 5 and 6 show the same voltage follower circuit in order to maintain the voltages monitored in the different phase paths. Specifically, the method comprises the following steps: the lightning monitoring device provided by this embodiment can monitor the overvoltage mains supply L1, L2, L3, N in real time and enter the corresponding pre-stage resistor decoupling resistors (to prevent lightning stroke) respectively, then rectify and divide the voltage, stabilize the voltage after further filtering by the capacitor inductor, send the direct current voltage to the corresponding voltage follower to stabilize the voltage and form isolation, and then send the voltage signal to the AD pin of the controller to obtain the alternating current voltage value by the proportional calculation, so that the controller has the capability of monitoring the multi-path alternating current voltage in real time; when the line is over-voltage, MCU detects the voltage value is abnormal, then it can record and alarm to user.
In the above specific overvoltage monitoring technical solution, the voltage of each line is monitored in real time by the above circuit, when a fault such as misconnection or disconnection occurs in the line, for example, when a live line is connected to a zero line, the voltage value monitored at the product terminal is necessarily abnormal, and the controller monitors the abnormality, and then an alarm can be given in real time. Therefore, when the circuit in the circuit to be monitored has a fault of misconnection or disconnection, the voltage in the circuit to be monitored is abnormal; the voltage monitoring circuit acquires an abnormal voltage signal, converts the abnormal voltage signal into a corresponding abnormal direct current signal and inputs the abnormal direct current signal into the controller; the controller outputs information representing voltage abnormality of the alternating current based on the abnormal direct current signal. Therefore, the overvoltage monitoring technical scheme provided by the embodiment also has the function of monitoring the fault of the misconnection of the line.
In a preferred embodiment of this embodiment, as shown in fig. 7, the current monitoring sensor 120 is a non-contact sensor, a wire in a circuit where the surge protection element is located passes through the current monitoring sensor, and the current monitoring sensor converts the measured ac leakage current into a proportional output voltage or current signal based on the principle that the current monitoring sensor passes through the magnetic flux electromagnetic induction when the ac current passes through the current monitoring sensor. For example, the current monitoring sensor 120 may be selected from the group consisting of model ZLA-C60.
Therefore, the current monitoring sensor 120 converts the leakage current into a voltage parameter or a current signal convenient for reading, and then transmits the converted voltage or current signal to a port of the controller 130, and the controller 130 converts the voltage or current signal into the leakage current according to the sensor parameter (the conversion mode can be used for setting a voltage and current calculation formula or a change curve through advanced testing or directly using an LUT table, wherein the information can be set in a memory connected with the controller 130 or directly set in a storage module in the controller 130), so as to monitor the leakage current process for the controller; however, the present embodiment is not limited to this, and for example, the above information determination may be directly implemented by a comparator.
As a preferred embodiment, as shown in fig. 8, the lightning monitoring device in this embodiment further includes a lightning stroke amplitude sensor, when a lightning current passes through the lightning stroke amplitude sensor, the lightning stroke amplitude sensor senses a transient magnetic flux of the lightning current, and the transient magnetic flux causes an induced electromotive force to be generated in an inductor in the current monitoring sensor; the magnitude of the lightning current can be obtained based on the induced electromotive force. The current monitoring sensor may consist of an inductor connected in parallel with a resistor through which lightning passes to induce a transient magnetic flux of alternating current, where the transient magnetic flux causes the inductor to generate an induced electromotive force to be transmitted to the terminal (e.g., J1-1J 2-2 in fig. 8); and the function of the resistor in the lightning stroke amplitude sensor is to bleed off some of the current in order to avoid damaging the circuit.
As shown in fig. 8, the lightning monitoring device further includes a voltage peak value holder connected to the current monitoring sensor, the voltage peak value holder is provided with an MOS transistor, and a voltage corresponding to an electromotive force output by the current monitoring sensor is transmitted into the MOS transistor; when a surge is monitored, the voltage peak value conserver maintains the voltage peak value, and the voltage follower of the later stage outputs the voltage peak value to the controller.
In a further preferred embodiment of this embodiment, the controller 130 calculates the lightning current peak value according to a predetermined voltage-current numerical relationship based on the voltage value input by the voltage follower recorded after the voltage peak value keeper. For example, the Q3 transistor in fig. 8 is part of a peak hold circuit for bleeding peak currents; when the IO port PC7 goes low, the MOS transistor is turned on, and the corresponding U12U 10 also goes low, so that the level can be discharged. After monitoring, the controller releases the voltage peak value through the MOS tube and waits for the next lightning surge to come.
When the surge protection element is subjected to surge and overvoltage for a long time, the surge protection element is gradually aged, the voltage-current characteristic curve of the surge protection element is changed to a certain extent, and when the leakage current of the surge protection element exceeds 500uA, the aging failure can be generally considered. Therefore, when the controller judges that the detected leakage current corresponding to the surge protection element exceeds 500uA based on the detection result, warning information for prompting that the surge protection device needs to be replaced is sent; that is, when the surge protection element is aged, the leakage current will increase and exceed a certain value, the surge protection device will be at risk of failure or even burning, so when the leakage current (for example, the surge protection element) at the two ends of the surge protection device is monitored to a certain value, the user is reminded to replace the surge protection device in time.
As shown in fig. 9, the lightning monitoring device 100 further includes a rectifier bridge for receiving the voltage corresponding to the electromotive force, and an optical coupling circuit connected to the rectifier bridge; after the voltage corresponding to the electromotive force is rectified, a direct current pulse signal is formed and input to the optical coupling circuit, and then is transmitted to a port of the controller, wherein an RTC module (RTC is an abbreviation of Real _ Time Clock, namely a Real-Time Clock) and a storage module are arranged in the controller; therefore, a pulse signal is formed at a port of the controller, the controller detects the pulse signal, a user of the RTC module acquires the duration and the times of lightning stroke, and the storage module is used for storing the duration and the times of the lightning stroke.
In a preferred embodiment of this embodiment, the lightning monitoring device 100 further includes a network communication circuit, and the network communication circuit includes a communication processor connected to the controller, and the communication processor is connected to an external network server. The signals of the communication processor are arranged to: and when the external network server receives whether the voltage of the circuit to be monitored transmitted by the communication processor is abnormal and/or whether the surge protection element corresponding to the circuit to be monitored is abnormal, the external network server sends the abnormal information to the user terminal. For example, the lightning monitoring device 100 is provided with a communication port supporting 485MODBUS type, so that the lightning monitoring device 100 itself supports 485MODBUS communication protocol; then, a 485-DTU or 485 serial server is used for realizing the mutual data transmission between the serial device and the network server through an operator network, so that the setting is carried out through a simple AT instruction; the product can be easily used to be connected to the cloud, and the monitoring information can be checked in real time by an application program and a webpage end in the terminal.
Those of ordinary skill in the art will understand that: the above-described method according to an embodiment of the present invention may be implemented in hardware, firmware, or as software or computer code storable in a recording medium such as a CD ROM, a RAM, a floppy disk, a hard disk, or a magneto-optical disk, or as computer code originally stored in a remote recording medium or a non-transitory machine-readable medium downloaded through a network and to be stored in a local recording medium, so that the method described herein may be stored in such software processing on a recording medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware such as an ASIC, an FPGA, or an SoC. It will be appreciated that the computer, processor, microprocessor controller or programmable hardware includes memory components (e.g., RAM, ROM, flash memory, etc.) that can store or receive software or computer code that, when accessed and executed by the computer, processor or hardware, implements the processing methods described herein. Further, when a general-purpose computer accesses code for implementing the processes shown herein, execution of the code transforms the general-purpose computer into a special-purpose computer for performing the processes shown herein.
Those of ordinary skill in the art will appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make many changes and simple substitutions to the technical solution of the present invention without departing from the technical solution of the present invention, and the technical solution of the present invention is protected by the following claims.
Claims (10)
1. A lightning monitoring device, comprising:
the overvoltage monitoring module is provided with a rectifying circuit, a filter circuit and a voltage follower circuit; when the circuit to be monitored receives lightning stroke, the rectifying circuit rectifies and divides the voltage of an electric signal acquired in the circuit to be monitored and transmits the electric signal to the filter circuit; the filter circuit converts the rectified and voltage-divided electric signal into direct-current voltage and inputs the direct-current voltage to the voltage follower circuit;
the current monitoring sensor is used for detecting a direct current signal of the surge protection element corresponding to the circuit to be monitored;
the controller is used for judging whether the circuit is abnormal or not, and the controller receives an electric signal of the circuit to be monitored input by the voltage following circuit and an electric signal input by the current monitoring sensor; the controller calculates the voltage value of the alternating current according to the electric signal transmitted by the voltage following circuit, and judges whether the voltage of the circuit to be monitored is abnormal or not based on the voltage value of the alternating current; and the controller calculates the direct current signal of the surge protection element corresponding to the circuit to be monitored according to the electric signal input by the current monitoring sensor, and judges whether the surge protection element corresponding to the circuit to be monitored is abnormal or not based on the direct current signal.
2. The lightning monitoring device according to claim 1, wherein when a fault occurs in a line in the circuit to be monitored, an abnormality occurs in the voltage in the circuit to be monitored; the voltage monitoring circuit acquires the abnormal voltage signal, converts the abnormal voltage signal into a corresponding abnormal direct current signal and inputs the abnormal direct current signal into the controller; the controller outputs information representing voltage abnormality of the alternating current based on the abnormal direct current signal.
3. The lightning monitoring device according to claim 1, wherein when the circuit to be monitored by the lightning monitoring device is a multi-phase circuit, the overvoltage monitoring module is disposed in each phase circuit.
4. The lightning monitoring device of claim 1, wherein the current monitoring sensor is a non-contact sensor and the current monitoring sensor converts the measured ac leakage current into a scaled voltage or current signal by the principle of flux electromagnetic induction when ac current passes through the current monitoring sensor.
5. The lightning monitoring device of claim 1, further comprising a lightning strike amplitude sensor that senses a transient magnetic flux of a lightning current as it passes through the lightning strike amplitude sensor, and the transient magnetic flux causes an induced electromotive force to be induced in an inductance in the current monitoring sensor; the magnitude of the lightning current can be obtained based on the induced electromotive force.
6. The lightning monitoring device according to claim 5, further comprising a voltage peak holder connected to the current monitoring sensor, wherein the voltage peak holder is provided with an MOS transistor, and a voltage corresponding to the electromotive force output by the current monitoring sensor is transmitted to the MOS transistor; when a surge is monitored, the voltage peak value conserver maintains the voltage peak value, and the voltage follower of the later stage outputs the voltage peak value to the controller.
7. The lightning monitoring device of claim 6, wherein the controller calculates the lightning current peak value from a predetermined voltage-current numerical relationship based on the voltage value input by the voltage follower after the voltage peak holder.
8. The lightning monitoring device of claim 5, further comprising a rectifier bridge receiving the voltage corresponding to the electromotive force, and an optical coupling circuit connected to the rectifier bridge; after the voltage corresponding to the electromotive force is rectified, a direct current pulse signal is formed and input to the optical coupling circuit, and then is transmitted to a port of the controller; therefore, a pulse signal is formed at the port of the controller, an RTC module and a storage module which are associated with the pulse signal are arranged in the controller, the user of the RTC module acquires the duration and the times of lightning stroke, and the storage module is used for storing the duration and the times of the lightning stroke.
9. The lightning monitoring device of claim 1, further comprising a network communication circuit including a communication processor connected to the controller, the communication processor connected to an external network server; the signal of the communication processor is arranged to: and when the external network server receives whether the voltage of the circuit to be monitored transmitted by the communication processor is abnormal and/or whether a surge protection element corresponding to the circuit to be monitored is abnormal, the external network server sends abnormal information to the user terminal.
10. A lightning protection device, comprising:
a surge protector provided with a lightning protection element; and
a lightning monitoring device connected to the surge protector device, the lightning monitoring device being as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774007.4A CN111812395A (en) | 2020-08-04 | 2020-08-04 | Lightning monitoring device and lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774007.4A CN111812395A (en) | 2020-08-04 | 2020-08-04 | Lightning monitoring device and lightning protection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824104A (en) * | 2021-10-20 | 2021-12-21 | 上海电科臻和智能科技有限公司 | Intelligent backup protection integrated surge protection device |
| CN116359597A (en) * | 2023-02-01 | 2023-06-30 | 珠海博威电气股份有限公司 | Method and device for measuring lightning parameters by medium-voltage switch |
-
2020
- 2020-08-04 CN CN202010774007.4A patent/CN111812395A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113824104A (en) * | 2021-10-20 | 2021-12-21 | 上海电科臻和智能科技有限公司 | Intelligent backup protection integrated surge protection device |
| CN113824104B (en) * | 2021-10-20 | 2022-09-13 | 上海电科臻和智能科技有限公司 | Intelligent backup protection integrated surge protection device |
| CN116359597A (en) * | 2023-02-01 | 2023-06-30 | 珠海博威电气股份有限公司 | Method and device for measuring lightning parameters by medium-voltage switch |
| CN116359597B (en) * | 2023-02-01 | 2024-04-16 | 珠海博威电气股份有限公司 | Method and device for measuring lightning parameters by medium-voltage switch |
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