CN103983830B - The device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow - Google Patents
The device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow Download PDFInfo
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Abstract
The invention discloses the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, comprise afterflow sampling and amplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module, signal processing and display module. The present invention can be used for the duty of Real-Time Monitoring switch-type surge protector, the automatically size of time, number of times and the afterflow of operation of recording; Can be judged in circuit and be occurred superpotential situation by the data of record simultaneously, according to meteorological condition, judgement is switching overvoltage or lightning surge, and by the data of record, power supply trouble is analyzed.
Description
Technical field
The present invention relates to the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, belong to thunder and lightning science and technology neckTerritory.
Background technology
In GB5007-2010 Code for design of lightning protection of buildings, specify, the consumer unit place introducing at lightning current should installLevelThe surge protector of test. The voltage protection level value of surge protector should be less than or equal to 2.5kV. Rushing of each protected modeHit current value, in the time cannot determining, dash current should be got and be equal to or greater than 12.5kA.The structure of level test surge protector, adoptsBy interstitial structure, there is afterflow problem in interstitial structure surge protector, after afterflow refers to impulsive discharge electric current, by power-supply systemFlow into the electric current of surge protector. Surge protector is arranged in electrical network circuit, and in fact afterflow is exactly power frequency short circuit current, thisJust require switch-type surge protector will there is the ability of automatic disconnection afterflow. The long or electric current mistake if there is time of afterflowGreatly, may cause the automatic trip circut breaking of transmission line of electricity, even cause the accident such as fire, blast.
Therefore, in the time that switch-type surge protector is arranged in transmission line of electricity, carry out the monitoring of afterflow, can be to its workUnderstand accurately judgement as state. The work of switch-type surge protector will have under higher overvoltage effect, once workAfter work, the voltage at two ends is very low, in the time that line voltage distribution exceedes the conducting voltage at two ends, just there will be afterflow phenomenon. Automatically detectSwitch-type surge protector current following device can be real-time monitoring switch type surge protector working condition, according to record dataCan judge superpotential working condition in this circuit, to the accident occurring in supply line, can enter according to the data of recordRow is analyzed, and this device can automatically record time, the number of times of the work of surge protector and produce the size of afterflow. AsIn fruit circuit, there is lightning strike accident, can carry out analysis and evaluation to lightning strike accident according to the data of record. At present, switching mode surge is protectedProtect the size of device afterflow and just under lab carry out simulation test, the actual afterflow size producing in the line does not also have realityTested. Therefore, invent this device for the circuit Real-Time Monitoring to switch-type surge protector.
Summary of the invention
Technical problem to be solved by this invention is to provide the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow,Be used for the duty of Real-Time Monitoring switch-type surge protector, the automatically size of time, number of times and the afterflow of operation of recording; WithIn time, can be judged and in circuit, be occurred superpotential situation by the data of record, according to meteorological condition judgement be switching overvoltage alsoBe lightning surge, and by the data of record, power supply trouble analyzed.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
The device that the invention provides the afterflow of a kind of automatic monitoring slowdown monitoring switch type surge protector, comprises afterflow sampling and amplitude limit mouldPiece, polarity conversion and Isolation Amplifier Module, active power filtering module and signal are processed and display module;
In the time there is overvoltage in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector is gotSample, and the voltage signal of sampling is carried out to amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit enters successivelyThe conversion of row polarity and isolation are amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation;Signal is processed with display module filtered voltage signal is processed, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module and is provided triggering signal, signal place to signal with Isolation Amplifier ModuleReason is carried out signals collecting with display module receiving time delay after triggering signal, and records time and the number of times of triggering signal.
As further prioritization scheme of the present invention, described afterflow sampling and amplitude limit module comprise afterflow sample circuit and limitWidth circuit, wherein:
Described afterflow sample circuit is the first resistance, and described the first resistance is connected on the earth connection of surge protector, usesIn carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance, the 3rd resistance and Transient Suppression Diode; Wherein, one end of the second resistanceBe connected with the earth terminal of the first resistance, one end of the 3rd resistance is connected with the other end of the first resistance, the other end of the second resistance,The other end of the 3rd resistance is connected with the two ends of Transient Suppression Diode respectively, forms loop.
As further prioritization scheme of the present invention, described polarity conversion comprises polarity switching with Isolation Amplifier ModuleAnd isolating amplifier circuit, described isolating amplifier circuit is isolated amplifier, wherein:
Described polarity switching comprises the first diode to the four diodes and the first electric capacity; Wherein, first electric capacityOne end respectively with the common port of the 3rd resistance and Transient Suppression Diode, the negative electrode of the first diode, the anode of the second diodeConnect, the other end of the first electric capacity respectively with the negative electrode of the common port of the second resistance and Transient Suppression Diode, the 3rd diode,The anodic bonding of the 4th diode, input isolated amplifier after the negative electrode of the second diode is connected with the negative electrode of the 4th diodeOne input, inputs another input of isolated amplifier after the anodic bonding of the anode of the first diode and the 3rd diode.
As further prioritization scheme of the present invention, described active power filtering module is active filter circuit, comprises the second electricityAppearance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 4th resistance, the 5th resistance, the 6th resistance and active chip, wherein, secondOne end of electric capacity is connected with the output of isolating amplifier circuit, and the other end is connected with the output of active chip; The 6th resistanceOne end is connected with the output of isolating amplifier circuit, the other end respectively with one end of the 3rd electric capacity, the anti-phase input of active chipEnd connects, the other end ground connection of the 3rd electric capacity, the normal phase input end of the active chip afterwards ground connection of connecting with the 5th resistance; The 4th resistanceOne end be connected with the normal phase input end of active chip, the other end is connected with the output of active chip; Active chip connect just,Negative 15 volts of power supplys, the 5th electric capacity one end is connected with positive 15 volts, other end ground connection; One end of the 4th electric capacity is connected with negative 15 volts, anotherOne end ground connection.
As further prioritization scheme of the present invention, described signal is processed with display module and is comprised signal processing circuit and aobviousShow device, wherein:
Described signal processing circuit comprises the 7th resistance, the 8th resistance, the 9th resistance, the 5th diode and single-chip microcomputer, itsIn, one end of the 7th resistance is connected with the output of active chip in active filter circuit, after the other end is connected with the 8th resistanceGround connection; One end of the 9th resistance is connected with the output of active chip in active filter circuit, the other end respectively with the five or two utmost pointThe negative electrode of pipe, the input of single-chip microcomputer connect, the plus earth of the 5th diode.
As further prioritization scheme of the present invention, described signal is processed with display module and is prolonged receiving after triggering signalThe acquisition time of Shi Jinhang signals collecting is a civil power cycle 20ms.
As further prioritization scheme of the present invention, described signal is processed with display module and is prolonged receiving after triggering signalThe delay time of Shi Jinhang signals collecting is 50 μ s.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) in the present invention, adopt isolated amplifier circuit, the low voltage section of the high-pressure section of sampling and signal processing is divided intoRow electrical isolation, security performance is good, and antijamming capability is strong;
(2) in the present invention, afterflow sample circuit adopts high-power precision resistance, has the sampled signal linearity good, sampling essenceSpend high feature;
(3) in the present invention, in signal processing circuit, adopt single-chip microcomputer, convenient signal treatment, has signal storage and real-timeThe feature of monitoring;
(4) circuit structure design of the present invention is simple, and cost is low, easy for installation, stable and reliable working performance; Can configure notWith the switch-type surge protector of through-flow size, independent installation separately, has wide range of applications; Device inside is provided with two-way independentlyPower circuit, directly with utility grid power supply, has the high voltage bearing feature of insulation when use.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Detailed description of the invention
Describe embodiments of the present invention below in detail, the example of described embodiment is shown in the drawings, wherein ad initioExtremely whole same or similar label represents same or similar element or has the element of identical or similar functions. Below by ginsengThe embodiment of examining accompanying drawing description is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Those skilled in the art of the present technique are understandable that, unless specially statement, singulative used herein " "," one ", " described " and " being somebody's turn to do " also can comprise plural form. Should be further understood that, in description of the present invention, useWording " comprises " and refers to and have described feature, integer, step, operation, element and/or assembly, exists or adds but do not get rid ofAdd one or more other features, integer, step, operation, element, assembly and/or their group. Should be appreciated that, when we claimWhen element is " connected " or " coupling " arrives another element, it can be directly connected or coupled to other elements, or also can depositIn intermediary element. In addition, " connection " used herein or " coupling " can comprise wireless connections or couple. Wording used herein"and/or" comprises arbitrary unit of listing item and all combinations that one or more is associated.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprise skillArt term and scientific terminology) have with the present invention under the identical meaning of the general understanding of those of ordinary skill in field. AlsoIt should be understood that such as those terms that define in general dictionary and should be understood to have in the context with prior artThe consistent meaning of meaning, unless and as here definition, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
The present invention designs the device of a kind of automatic monitoring slowdown monitoring switch type surge protector afterflow, as shown in Figure 1, comprises that afterflow getsSample and amplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module and signal are processed and display module;
In the time there is overvoltage in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector is gotSample, and the voltage signal of sampling is carried out to amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit enters successivelyThe conversion of row polarity and isolation are amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation;Signal is processed with display module filtered voltage signal is processed, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module and is provided triggering signal, signal place to signal with Isolation Amplifier ModuleReason is carried out signals collecting with display module receiving time delay after triggering signal, and records time and the number of times of triggering signal.
The device of a kind of automatic monitoring slowdown monitoring switch of the present invention type surge protector afterflow, its preferred embodiment as shown in Figure 2.
Described afterflow sampling and amplitude limit module comprise afterflow sample circuit and amplitude limiter circuit, wherein:
Described afterflow sample circuit is the first resistance R 1, and described the first resistance R 1 is connected on the earth connection of surge protectorUpper, for carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance R 2, the 3rd resistance R 3 and Transient Suppression Diode TVS1; Wherein, the second electricityOne end of resistance R2 is connected with the earth terminal of the first resistance R 1, and one end of the 3rd resistance R 3 is connected with the other end of the first resistance R 1,The other end of the second resistance R 2, the other end of the 3rd resistance R 3 are connected with the two ends of Transient Suppression Diode TVS1 respectively, formLoop; Transient Suppression Diode TVS1 is used for carrying out amplitude limit, the second resistance R 2, the 3rd resistance R 3 to afterflow through the first resistance R 1The electrical potential difference forming decays to prevent that electric current is excessive, improves Limiting effect.
Described polarity conversion comprises polarity switching and isolating amplifier circuit with Isolation Amplifier Module, and described isolation is amplifiedCircuit is isolated amplifier, wherein:
Described polarity switching comprises the first diode D1 to the four diode D4 and the first capacitor C 1; Wherein, firstOne end of capacitor C 1 respectively with the negative electrode of the common port of the 3rd resistance R 3 and Transient Suppression Diode TVS1, the first diode D1,The anodic bonding of the second diode D2, the other end of the first capacitor C 1 respectively with the second resistance R 2 and Transient Suppression Diode TVS1Common port, the negative electrode of the 3rd diode D3, the anodic bonding of the 4th diode D4, the negative electrode of the second diode D2 and the four or twoAn input of input isolated amplifier after the negative electrode of utmost point pipe D4 connects, the anode of the first diode D1 and the 3rd diode D3'sAfter anodic bonding, input another input of isolated amplifier;
The first capacitor C 1 is filter capacitor, carries out filtering for the signal to after amplitude limit; The first diode D1 to the four or twoUtmost point pipe D4 forms rectifier bridge, and for AC signal is converted to direct current signal, the port 2,4 of rectifier bridge is defeated by direct current signalGo out the isolated amplifier to rear class, complete polarity translation function; Isolated amplifier amplifies after isolating to the received signalProcess.
Described active power filtering module is active filter circuit, comprise the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4,The 5th capacitor C 5, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and active chip IC1, wherein, one of the second capacitor C 2End is connected with the output of isolating amplifier circuit, and the other end is connected with the output of active chip IC1; One end of the 6th resistance R 6Be connected with the output of isolating amplifier circuit, the other end respectively with one end of the 3rd capacitor C 3, the anti-phase input of active chip IC1End connects, the other end ground connection of the 3rd capacitor C 3, the normal phase input end of the active chip IC1 afterwards ground connection of connecting with the 5th resistance R 5;One end of the 4th resistance R 4 is connected with the normal phase input end of active chip IC1, and the output of the other end and active chip IC1 connectsConnect; Active chip IC1 connects positive and negative 15 volts of power supplys, and one end of the 5th capacitor C 5 is connected with positive 15 volts, other end ground connection; The 4thOne end of capacitor C 4 is connected with negative 15 volts, other end ground connection.
Described signal is processed with display module and is comprised signal processing circuit and display, wherein:
Described signal processing circuit comprises the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the 5th diode D5 and listSheet machine, wherein, one end of the 7th resistance R 7 is connected with the output of active chip IC1 in active filter circuit, the other end andGround connection after eight resistance R 8 series connection; One end of the 9th resistance R 9 is connected with the output of active chip IC1 in active filter circuit, anotherOne end is connected with one end of the 5th diode D5, the input of single-chip microcomputer respectively, the other end ground connection of the 5th diode D5;
, after single-chip microcomputer is processed, transfer to display and show, settling signal through the signal of active filter circuitCollection, processing, demonstration.
The operation principle of a kind of automatic monitoring slowdown monitoring switch of the present invention type surge protector current following device is as follows:
While having Lightning Over-voltage or switching overvoltage in circuit, cause switch-type surge protector action. Afterflow sampling electricityIn resistance, in the time having electric current to flow through, form voltage signal at its two ends. Owing to working as switch-type surge protector under overvoltage effectConducting in a flash, the through-flow electric current that can reach more greatly tens kilo-amperes, but the duration is very short, tens to hundreds of microsecond. AsThere is afterflow in fruit, afterflow meeting exists, and the duration is the ms order of magnitude, so voltage signal need to carry out through amplitude limiter circuitAmplitude limit.
Voltage signal after amplitude limit is through polarity switching, by the voltage signal of sampling no matter be positive polarity or negativePolarity all will be converted to positive polarity, and object is to guarantee to deliver to the voltage signal that the voltage signal of signal processing unit is positive polarity.Positive polarity sampling voltage signal is delivered in isolated amplifier and is carried out signal amplification, while action due to switch-type surge protector, and winkBetween electric current larger, form very high overvoltage, adopt insulaion resistance larger isolated amplifier, ensure the peace of signal processing circuitFull work.
Be divided into two-way through isolated amplifier amplifying signal, a road is as the triggering signal of single-chip microcomputer treatment circuit, at listIn the program of sheet machine treatment circuit, while only having triggering signal, time when single-chip microcomputer record triggers, then carry out signals collecting,The time gathering is about 20ms, time in a civil power cycle, and triggering signal control gathers when voltage, has a timeTime delay is about 50 μ s, when after overvoltage effect, then gathers, and at this moment current value is afterflow value; Another road signal is that afterflow is gotSample signal, after the higher hamonic wave signal in active filter circuit filtered signal, delivers to signal processing circuit and carries out signal placeReason, single-chip microcomputer, time and number of times while recording triggering signal, process sampled signal to calculate current value, storesAnd be presented on display. The data of these records can be called, for scientific research or other purposes.
The above be only the detailed description of the invention in the present invention, but protection scope of the present invention is not limited to this, appointsThe people what is familiar with this technology, in the disclosed technical scope of the present invention, can understand conversion or the replacement expected, all should be encompassed inOf the present invention comprise scope within, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. a device for automatic monitoring slowdown monitoring switch type surge protector afterflow, is characterized in that, this device comprise afterflow sampling withAmplitude limit module, polarity conversion and Isolation Amplifier Module, active power filtering module and signal are processed and display module;
In the time there is overvoltage in circuit, the afterflow that afterflow sampling and amplitude limit module produce surge protector samples, andVoltage signal to sampling carries out amplitude limit; Polarity conversion and the Isolation Amplifier Module voltage signal after to amplitude limit carries out polarity successivelyConversion and isolation are amplified; Higher hamonic wave target signal filter in voltage signal after active power filtering module is amplified isolation; Signal placeReason is processed filtered voltage signal with display module, and the current value calculating is stored and shown;
Meanwhile, polarity conversion is also processed with display module triggering signal is provided to signal with Isolation Amplifier Module, signal process withDisplay module carries out signals collecting receiving time delay after triggering signal, and records time and the number of times of triggering signal.
2. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that instituteState afterflow sampling and amplitude limit module comprises afterflow sample circuit and amplitude limiter circuit, wherein:
Described afterflow sample circuit is the first resistance (R1), and described the first resistance (R1) is connected on the earth connection of surge protectorUpper, for carrying out afterflow sampling;
Described amplitude limiter circuit comprises the second resistance (R2), the 3rd resistance (R3) and Transient Suppression Diode (TVS1); Wherein, secondOne end of resistance (R2) is connected with the earth terminal of the first resistance (R1), one end of the 3rd resistance (R3) and the first resistance (R1) anotherOne end connect, the other end of the second resistance (R2), the other end of the 3rd resistance (R3) respectively with Transient Suppression Diode (TVS1)Two ends connect, form loop.
3. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 2 afterflow, is characterized in that instituteState polarity conversion and comprise polarity switching and isolating amplifier circuit with Isolation Amplifier Module, described isolating amplifier circuit is isolationAmplifier, wherein:
Described polarity switching comprises that the first diode (D1) is to the 4th diode (D4) and the first electric capacity (C1); Wherein,One end of one electric capacity (C1) respectively with common port, first diode of the 3rd resistance (R3) and Transient Suppression Diode (TVS1)(D1) negative electrode, the anodic bonding of the second diode (D2), the other end of the first electric capacity (C1) respectively with the second resistance (R2) withThe anodic bonding of the common port of Transient Suppression Diode (TVS1), the negative electrode of the 3rd diode (D3), the 4th diode (D4), theAn input of input isolated amplifier after the negative electrode of two diodes (D2) is connected with the negative electrode of the 4th diode (D4), the one or twoAfter the anodic bonding of the anode of utmost point pipe (D1) and the 3rd diode (D3), input another input of isolated amplifier.
4. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 3 afterflow, is characterized in that instituteStating active power filtering module is active filter circuit, comprises the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5thElectric capacity (C5), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6) and active chip (IC1), wherein, the second electric capacity(C2) one end is connected with the output of isolating amplifier circuit, and the other end is connected with the output of active chip (IC1); The 6th electricityThe resistance one end of (R6) and the output of isolating amplifier circuit are connected, the other end respectively with one end of the 3rd electric capacity (C3), have source coreThe inverting input of sheet (IC1) connects, the other end ground connection of the 3rd electric capacity (C3), the normal phase input end of active chip (IC1) withGround connection after the 5th resistance (R5) series connection; One end of the 4th resistance (R4) is connected with the normal phase input end of active chip (IC1), anotherEnd is connected with the output of active chip (IC1); Active chip (IC1) connects positive and negative 15 volts of power supplys, one of the 5th electric capacity (C5)End is connected with positive 15 volts, other end ground connection; One end of the 4th electric capacity (C4) is connected with negative 15 volts, other end ground connection.
5. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 4 afterflow, is characterized in that instituteState signal processing and comprise signal processing circuit and display with display module, wherein:
Described signal processing circuit comprises the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9), the 5th diode (D5)And single-chip microcomputer, wherein, one end of the 7th resistance (R7) is connected with the output of active chip in active filter circuit (IC1), anotherOne end connect with the 8th resistance (R8) after ground connection; Active chip (IC1) in one end of the 9th resistance (R9) and active filter circuitOutput connect, the other end is connected with the negative electrode of the 5th diode (D5), the input of single-chip microcomputer respectively, the 5th diode(D5) plus earth.
6. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that instituteStating signal, to process with display module be a civil power week at the acquisition time that receives time delay after triggering signal and carry out signals collectingPhase 20ms.
7. the device of a kind of automatic monitoring slowdown monitoring switch type surge protector according to claim 1 afterflow, is characterized in that instituteStating signal, to process with display module be 50 μ s at the delay time that receives time delay after triggering signal and carry out signals collecting.
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| CN111060734A (en) * | 2019-12-26 | 2020-04-24 | 上海联影医疗科技有限公司 | High-side current detection device and system |
| CN117929902B (en) * | 2024-03-14 | 2024-05-24 | 浙江泰科天唯电气有限公司 | Composite surge protector detection method, surge protector and storage medium |
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