CN103412185A - Lightning current detecting device - Google Patents
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- CN103412185A CN103412185A CN201310373741XA CN201310373741A CN103412185A CN 103412185 A CN103412185 A CN 103412185A CN 201310373741X A CN201310373741X A CN 201310373741XA CN 201310373741 A CN201310373741 A CN 201310373741A CN 103412185 A CN103412185 A CN 103412185A
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Abstract
The invention discloses a lightning current detecting device which comprises a signal conditioning unit, an energy taking unit and a collecting unit. The lightning current detecting device can directly use lightning stroke energy on overhead transmission lines or lightning conductors, and the lightning stroke energy can be coupled by an energy taking coil to obtain power finally. Monitoring equipment can be driven without external power supply to provide energy. The lightning current detecting device can guarantee stable, continuous and real-time monitoring for a long time without taking the situation where the lighting stroke cannot be monitored due to the fact that external power is insufficient to cause equipment failure into consideration. The lightning current detecting device can accurately record time, amplitude and polarity of the lightning stroke. The lightning current detecting device removes a special trigger circuit and has the advantages of being high in accuracy, simple in structure, small in size, low in cost, high in safety and the like. In addition, the lightning current detecting device has the advantages of being simple in structure, small in size, light in weight, capable of taking energy conveniently, convenient to install, flexible to adjustable and the like.
Description
Technical field
The invention belongs to the lightning current monitoring technical field, be particularly related to a kind of lightning stream testing apparatus, specifically applicable to the Real-Time Monitoring of the amplitude of lightning current of the lightning rod of electric system overhead transmission line, transformer station and buildings, lightning arrester, polarity, time of origin.
Background technology
Development along with national economy, voltage class of electric power system and scale develop rapidly thereupon and enlarge, the electric system overhead transmission line distributes wide, be easy to suffer the invasion and attack of thunder and lightning, for transformer station and buildings, also usually suffer the invasion and attack of thunder and lightning, due to randomness and the transience of the generation of thunder and lightning, therefore accurately the time and the characteristic that occur of location lightning current seems particularly important.The parameter characteristic of lightning current, to inquiring into the lightning protection countermeasure, improves the lightning protection facility performance, estimates lightning protection facility to the protection domain of various device and transformer station and buildings and analyzes the damage to crops caused by thunder accident, distinguishes accident responsibility, and all tool is of great significance.Simultaneously, the measurement of lightning current parameter is also the element task of carrying out lightning performance research, after obtaining the basic parameter of lightning current, can shoot the arrow at the target, and solves targetedly Lightning Protection.
The measurement of lightning current parameter has remote measurement and directly measures two kinds of modes.Remote measurement is to utilize the lightening detection antenna to survey to propagate from afar the thunder and lightning electromagnetic wave of coming and in this anti-lightning current parameter measurement mode that pushes away amplitude of lightning current and waveform.Due to the lightening detection antenna, away from the thunder and lightning origination point, in thunder and lightning Electromagnetic Wave Propagation process, affected by landform, buildings etc., have in various degree decay and dispersion, therefore, not high by the lightning current parameter accuracy that remote measurement measures.It is lightning current to be carried out to the mode of directly measuring at the thunderbolt origination point that the lightning current parameter is directly measured.The probability and the time that due to the thunderbolt jobbie, occur are uncertain, thus lightning current directly to measure random very large, this just needs also lower device of the high but also cost of a kind of not only accuracy of measurement.Past, generally adopt the method for mounting magnetic steel rod on electric power line pole tower, the magnetic field that utilizes lightning current to produce makes the magnetic link magnetization, because having stronger magnetic, magnetic link rectifys characteristic, so lightning current still can retain larger remanent magnetism after by magnetic link, by the size of monitoring its remanent magnetism, can determine the size of tested lightning current amplitude.To be that cost is low be convenient to a large amount of installations to the advantage of this method, but shortcoming is the formula of magnetic link and the dispersiveness of production technology, and the error of measurement result own is large, can not record time that thunder and lightning occurs and can only the single record, obtain the data inconvenience, workload is large.
Utility model 200720173616.4 " a kind of lightning current monitoring device ", solved the monitoring problem whether lightning arrester is struck by lightning, although apparatus structure is simple, cost is low, but can only illustrate whether lightning protection is struck by lightning, can not accurately locate thunderbolt time of origin, polarity and amplitude size, and the placement location meeting magnetic field of jamming equipment own, affect measurement accuracy.
Chinese invention patent 200710169010.8 " a kind of lightning current measurement method and device " is although adopt the bidirectional wireless communication mode, amplitude of lightning current, steepness, polarity and thunderbolt time when multichannel front end survey record instrument can be used for measuring and record the thunderbolt generation, but its energy supply partly needs balancing cell or sun-generated electric power, run into the not enough situation of rainy weather or battery electric power, its measuring method can be very restricted, and can not carry out the chronicity Real-Time Monitoring.Equally, China's novel practical 200820191482.3 " overhead transmission line and lightning rod lightning current population parameter on-Line Monitor Device ", its energy supply part is also utilized solar panel, accumulator and transformer, need regularly reserve battery to be checked, increase workload, while running into equally rainy weather or battery electric power deficiency, its method also can be very limited.
Therefore, be necessary to propose a kind of lightning current monitoring system, can continue to realize monitored by thunderbolt to overhead transmission line and lightning rod, and the moment, amplitude and the polarity that can the accurate recording thunderbolt occur, do not need external power supply simultaneously.
Summary of the invention
In view of this, technical matters to be solved by this invention is to provide a kind of lightning stream testing apparatus, can continue to realize whether the lightning rod to transmission line of electricity or buildings monitored by thunderbolt, and can accurate recording moment of occurring of thunderbolt and amplitude, polarity, the trigger circuit without special, have precision high, simple in structure, volume is little, and cost is low, the characteristics such as security height.
The object of the present invention is achieved like this:
A kind of lightning stream testing apparatus provided by the invention, comprise ,Qu Neng unit, signal condition unit and collecting unit;
Described signal condition unit, keep for the induction lightening signal and to the thunder and lightning amplitude signal of sensing;
The described energy unit of getting, obtain energy for the lightning current of flowing through from lightning channel, and the stable output energy is the collecting unit energy supply after getting energy unit effect;
Described collecting unit, be used to completing the output signal that gathers and store after the conditioning of signal condition unit.
Further, described signal adjusts unit to comprise signal coil, integrating resistor, positive polarity peak holding circuit and negative polarity peak holding circuit;
Described signal coil, for induction lightening stream signal;
Described integrating resistor, for signal coil, forming from integrated form, make the direct proportional relation of output voltage signal and lightning current;
Described positive polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the positive polarity lightning current is exported;
Described negative polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the negative polarity lightning current is exported;
The sampling end of described integrating resistor is connected to respectively positive polarity peak holding circuit and negative polarity peak holding circuit, other end ground connection;
The output terminal of described positive polarity peak holding circuit and negative polarity peak holding circuit and the input end of collecting unit link.
Further, described signal coil adopts from the integration type Rogowsky coil.
Further, described get can unit comprise get can coil, front end protective device, rectification filtering unit, charging capacitor, voltage-limiting protection unit and voltage regulation unit,
The described energy coil of getting, obtain energy for the induction of the lightning current from the lightning current passage of flowing through;
Described front end protective device, be used to limiting amplitude of lightning current with the protection subsequent conditioning circuit;
Described rectification filtering unit, for rectifying and wave-filtering get can coil the output electric energy;
Described charging capacitor, for storing the electric energy after the rectification filtering unit rectification;
Described voltage-limiting protection unit, be used to limiting the voltage magnitude of voltage regulation unit;
Described voltage regulation unit, for stabilizing to electric energy the 3.3V Voltage-output;
The output terminal of described voltage regulation unit is connected with collecting unit.
Further, described collecting unit comprises A/D converter, single-chip microcomputer, clock unit and data storage element;
Described A/D converter is digital signal for the analog signal conversion by the output of signal condition unit;
Described single-chip microcomputer, for collection, the storage of control signal with communicate by letter;
Described clock unit, the time occurred be used to recording lightning current;
Described data storage element, the amplitude signal, lightning current time of origin and the lightning current polarity that collect for storage.
Further, also comprise shell, described shell comprises the coil shielding box, gathers shielding box and fixed support, and described fixed support is fixed in lightning channel or lightning arrester enters on the ground band iron, described coil shielding box connects as one by the jack mode with gathering shielding box, is positioned on fixed support; Described signal coil and line taking circle are placed in the coil shielding box, ,Qu Neng unit, described signal condition unit, the remainder of collecting unit except coil are placed in the collection shielding box, by plug and coil, become one, then via fixed support, be fixed in various lightning channels or lightning arrester and enter on the ground band iron; Described coil shielding box is divided into two parts up and down of flexible connection, and horizontal and vertical a gap is arranged all; Described fixed support comprises bracket tray, strap and set bolt, and described bracket tray is for placing the coil shielding box, and described strap and set bolt enter the ground band iron for support being fixed in to lightning channel or lightning arrester.
Further, described positive polarity peak holding circuit comprises the first diode, the second resistance, the 4th resistance and the first electric capacity, the sampling end of described integrating resistor and the positive pole of the first diode link, the negative pole of described the first diode accesses the Single-chip Controlling unit after with the 4th resistance, connecting, ground connection after described the first diode and the common junction of the 4th resistance connect with the first electric capacity, described the 4th resistance and ground connection after the common junction of Single-chip Controlling unit connects the second resistance;
Described negative polarity peak holding circuit comprises the second diode, the 3rd resistance, the 5th resistance and the second electric capacity, the sampling end of described sample resistance and the positive pole of the second diode link, the negative pole of described the second diode accesses the Single-chip Controlling unit after with the 5th resistance, connecting, described the second diode connects by coil ground connection with the second electric capacity with the common junction of the 5th resistance, described the 5th resistance and ground connection after the common junction of Single-chip Controlling unit connects the 3rd resistance.
Further, described get can unit the front-end protection unit comprise that access gets the 6th resistance between can coil two output terminals;
Described rectification filtering unit comprises by the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 3rd electric capacity and the 7th resistance; Described the 3rd diode, the 4th diode, the 5th diode and the 6th diode form rectifier bridge, wherein, the negative pole of the positive pole of described the 3rd diode and the 4th diode links, the negative pole of the negative pole of described the 4th diode and the 6th diode links, the negative pole of the positive pole of described the 6th diode and the 5th diode links, and the positive pole of the positive pole of described the 5th diode and the 3rd diode links;
The described output terminal of getting the energy coil accesses respectively the common junction of the 3rd diode and the 4th diode and the common junction of the 5th diode and the 6th diode, described the 3rd electric capacity accesses respectively the common junction of the 4th diode and the 6th diode and the common junction of the 3rd diode and the 5th diode with two ends after the 7th resistance is in parallel, wherein, be connected to an end ground connection of the common junction of the 3rd diode and the 5th diode; The output stage of described rectification filtering unit exports the voltage-limiting protection unit to after connecting the first unidirectional TVS pipe parallel with one another and the 4th electric capacity, and the described first unidirectional TVS pipe and the 4th electric capacity are all in parallel with the 3rd electric capacity and the 7th resistance.
Further, described voltage regulation unit comprises voltage stabilizing chip and peripheral circuit thereof; Described voltage stabilizing chip adopts Max5035, the output terminal of described voltage-limiting protection unit is connected to the VIN end of voltage stabilizing chip, between described VIN end and SGND end, be connected with the 8th resistance and the 9th resistance be cascaded, the ON/OFF of described voltage stabilizing chip end with by switch and SGND end, link after the common junction of the 8th resistance and the 9th resistance connects, described VD end passes through that the 7th electric capacity is held with GND respectively and SGND connects rear ground connection; After the BST end of described voltage stabilizing chip passes through the 6th electric capacity and the LX end connects, then by the second unidirectional TVS pipe ground connection; The common junction of described the 6th electric capacity and LX end is connected to the microcontroller power supply input end by the tenth resistance, and the FB end of described voltage stabilizing chip is connected between the tenth resistance and microcontroller power supply input end;
On the input end of described voltage regulation unit, be connected with the 5th electric capacity of ground connection, on the output terminal of described voltage regulation unit, be connected with the 8th electric capacity of ground connection;
Further, in described collecting unit, the single-chip microcomputer model is C8051F912; In described collecting unit, storage unit adopts ferroelectric memory FM3130.
Beneficial effect of the present invention is:
1. the energy when the present invention directly utilizes overhead transmission line or lightning rod to be struck by lightning, by getting the coupling of energy coil, finally obtain the power supply of 3.3V, without external power source, provide the energy drives monitoring equipment, can guarantee steady in a long-term continue carry out Real-Time Monitoring, to such an extent as to need not consider, cause the situation of equipment failure monitoring less than thunderbolt because of the external power deficiency;
Sample of signal holding unit of the present invention and get can unit when thunderbolt occurs, can work simultaneously, Real-Time Monitoring thunderbolt generation information, do not need additional trigger circuit, reliability is higher;
3. can long-term work in the industrial frequency AC environment, and can bear larger surge voltage, by Rogowsky coil with get can coil, the output signal of current sensor and get can unit and the complete electrical isolation of electrical network primary side, have good security feature;
The present invention can the monitor transmission line of electricity or lightning rod whether suffered thunderbolt, time, the amplitude of lightning current, polarity that the real time record thunderbolt occurs, can meet preferably and monitor needs;
5. the power supply that 3.3V can unit can be provided of getting of the present invention, can be in order to single-chip microcomputer and hardware clock energy supply, favorable expandability;
6. current measuring range of the present invention, from positive and negative several kilo-amperes to the hundreds of kilo-ampere, has comprised that transmission line of electricity and lightning rod may suffer the almost four corner of lightning current, meet the needs of Practical Project;
7. screening can of the present invention (namely installing profile) is simple in structure, practical, and sufficient science and practical value are arranged.
8. the present invention is simple in structure, has a volume little, lightweight, and getting can be convenient, be convenient to install, can flexible etc. advantage.
The accompanying drawing explanation
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is principle schematic of the present invention;
Fig. 2 is the Luo-coil structural representation;
Fig. 3 is just/negative peak holding unit circuit diagram;
Fig. 4 is front-end protection unit and rectification filtering unit circuit diagram;
Fig. 5 is the voltage regulation unit circuit diagram;
Fig. 6 is monitoring device screening can structural drawing;
Fig. 7 is the input waveform that example is got the energy unit;
Fig. 8 is the output waveform that example is got the energy unit;
Fig. 9 is example monitoring lightning current input waveform;
Figure 10 is lightning current monitoring output waveform;
Figure 11 is the C8051F912 circuit diagram;
Figure 12 is ferroelectric memory circuit figure.
In figure, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 8th capacitor C 8, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the unidirectional TVS pipe of the 7th resistance R 7, first TVS1, the second unidirectional TVS pipe TVS2; Gather shielding box 1, strap 2, set bolt 3, coil shielding box 4, bracket tray 5, gap 6.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment is only for the present invention is described, rather than in order to limit the scope of the invention.
Fig. 1 is principle schematic of the present invention, Fig. 2 is the Luo-coil structural representation, Fig. 3 is just/negative peak holding unit circuit diagram, Fig. 4 is front-end protection unit and rectification filtering unit circuit diagram, Fig. 5 is the voltage regulation unit circuit diagram, Fig. 6 is monitoring device screening can structural drawing, Fig. 7 is the input waveform that example is got the energy unit, Fig. 8 is the output waveform that example is got the energy unit, Fig. 9 is example monitoring lightning current input waveform, Figure 10 is lightning current monitoring output waveform, Figure 11 is the C8051F912 circuit diagram, Figure 12 is ferroelectric memory circuit figure, as shown in the figure: a kind of lightning stream testing apparatus provided by the invention, for with lightning protection, being used in conjunction with, realize the monitoring of lightning current correlation parameter, comprise the signal condition unit, get the energy unit, collecting unit and shell,
Described signal condition unit, keep for the induction lightening signal and to the thunder and lightning amplitude signal of sensing;
The described energy unit of getting, obtain energy for the lightning current of flowing through from lightning channel, and the stable output energy is the collecting unit energy supply after getting the energy circuit function;
Described collecting unit, be used to completing the output signal that gathers and store after the conditioning of signal condition unit.
Described signal adjusts unit to comprise signal coil, integrating resistor, positive polarity peak holding circuit and negative polarity peak holding circuit;
Described signal coil, for induction lightening stream signal;
Described integrating resistor, for signal coil, forming from integrated form, make the direct proportional relation of output voltage signal and lightning current;
Described positive polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the positive polarity lightning current is exported;
Described negative polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the negative polarity lightning current is exported;
The sampling end of described integrating resistor is connected to respectively positive polarity peak holding circuit and negative polarity peak holding circuit, other end ground connection;
The output terminal of described positive polarity peak holding circuit and negative polarity peak holding circuit and the input end of collecting unit link.
Described signal coil adopts from the integration type Rogowsky coil.
Described get can unit comprise get can coil, front end protective device, rectification filtering unit, charging capacitor, voltage-limiting protection unit and voltage regulation unit,
The described energy coil of getting, obtain energy for the induction of the lightning current from the lightning current passage of flowing through;
Described front end protective device, for the protection of subsequent conditioning circuit, avoid when amplitude of lightning current is excessive, subsequent conditioning circuit being caused damage;
Described rectification filtering unit, the output of getting the energy coil for rectifying and wave-filtering, the electric energy that rough purification is obtained;
Described charging capacitor, for storing the electric energy after the rectification filtering unit rectification;
Described voltage-limiting protection unit, be not subjected to superpotential infringement for the protection of voltage regulation unit;
Described voltage regulation unit, for stabilizing to electric energy the 3.3V Voltage-output;
The output terminal of described voltage regulation unit is connected with collecting unit.
Described collecting unit comprises mould/number (A/D) converter, single-chip microcomputer, clock unit and data storage element;
Described mould/number (A/D) converter is digital signal for the analog signal conversion by the output of signal condition unit;
Described single-chip microcomputer, be used to controlling collection, storage, communication etc.;
Described clock unit, the time occurred be used to recording lightning current;
Described data storage element, the amplitude signal, lightning current time of origin and the lightning current polarity that collect for storage.
Described shell comprises coil shielding box 4, gathers shielding box 1 and fixed support, described fixed support is fixed in lightning channel or lightning arrester enters on the ground band iron, described coil shielding box connects as one by the jack mode with gathering shielding box, is positioned on fixed support; Described signal coil and line taking circle are placed in the coil shielding box, ,Qu Neng unit, described signal condition unit, the remainder of collecting unit except coil are placed in the collection shielding box, by plug and coil, become one, then via fixed support, be fixed in various lightning channels or lightning arrester and enter on the ground band iron; Described coil shielding box is divided into two parts up and down of flexible connection, and horizontal and vertical a gap 6 is arranged all; Described fixed support comprises bracket tray 5, strap 2 and set bolt 3, and described bracket tray is for placing the coil shielding box, and described strap and set bolt enter the ground band iron for support being fixed in to lightning channel or lightning arrester.
Fig. 3, in Fig. 4 and Fig. 5, the first diode means with D1, the second diode means with D2, the 3rd diode means with D3, the 4th diode means with D4, the 5th diode means with D5, the 6th diode means with D6, the first electric capacity means with C1, the second electric capacity means with C2, the 3rd electric capacity means with C3, the 8th electric capacity means with C8, the first resistance means with R1, the second resistance means with R2, the 3rd resistance means with R3, the 4th resistance means with R4, the 5th resistance means with R5, the 6th resistance means with R6, the 7th resistance means with R7, the effective TVS1 of the first unidirectional TVS means, the effective TVS2 of the second unidirectional TVS means,
Described positive polarity peak holding circuit comprises the first diode, the second resistance, the 4th resistance and the first electric capacity, the sampling end of described integrating resistor and the positive pole of the first diode link, the negative pole of described the first diode accesses the Single-chip Controlling unit after with the 4th resistance, connecting, ground connection after described the first diode and the common junction of the 4th resistance connect with the first electric capacity, described the 4th resistance and ground connection after the common junction of Single-chip Controlling unit connects the second resistance;
Described negative polarity peak holding circuit comprises the second diode, the 3rd resistance, the 5th resistance and the second electric capacity, the sampling end of described sample resistance and the positive pole of the second diode link, the negative pole of described the second diode accesses the Single-chip Controlling unit after with the 5th resistance, connecting, described the second diode connects by coil ground connection with the second electric capacity with the common junction of the 5th resistance, described the 5th resistance and ground connection after the common junction of Single-chip Controlling unit connects the 3rd resistance.
The front-end protection unit of described energy taking device comprise access get can coil surge protection resistance (the 6th resistance) between two output terminals;
Described rectification filtering unit comprises by the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 3rd electric capacity and the 7th resistance; Described the 3rd diode, the 4th diode, the 5th diode and the 6th diode form rectifier bridge, wherein, the negative pole of the positive pole of described the 3rd diode and the 4th diode links, the negative pole of the negative pole of described the 4th diode and the 6th diode links, the negative pole of the positive pole of described the 6th diode and the 5th diode links, and the positive pole of the positive pole of described the 5th diode and the 3rd diode links;
The described output terminal of getting the energy coil accesses respectively the common junction of the 3rd diode and the 4th diode and the common junction of the 5th diode and the 6th diode, described the 3rd electric capacity accesses respectively the common junction of the 4th diode and the 6th diode and the common junction of the 3rd diode and the 5th diode with two ends after the 7th resistance is in parallel, wherein, be connected to an end ground connection of the common junction of the 3rd diode and the 5th diode; The output stage of described rectification filtering unit exports the voltage-limiting protection unit to after connecting the first unidirectional TVS pipe parallel with one another and the 4th electric capacity, and the described first unidirectional TVS pipe and the 4th electric capacity are all in parallel with the 3rd electric capacity and the 7th resistance, for voltage stabilizing.
Described voltage regulation unit comprises voltage stabilizing chip and peripheral circuit thereof; Described voltage stabilizing chip adopts Max5035, the output terminal of described voltage-limiting protection unit is connected to the VIN end of voltage stabilizing chip, between described VIN end and SGND end, be connected with the 8th resistance and the 9th resistance be cascaded, the ON/OFF of described voltage stabilizing chip end with by switch and SGND end, link after the common junction of the 8th resistance and the 9th resistance connects, described VD end passes through that the 7th electric capacity is held with GND respectively and SGND connects rear ground connection; After the BST end of described voltage stabilizing chip passes through the 6th electric capacity and the LX end connects, then by the second unidirectional TVS pipe ground connection; The common junction of described the 6th electric capacity and LX end is connected to the microcontroller power supply input end by the tenth resistance, and the FB end of described voltage stabilizing chip is connected between the tenth resistance and microcontroller power supply input end;
On the input end of described voltage regulation unit, be connected with the 5th electric capacity of ground connection, on the output terminal of described voltage regulation unit, be connected with the 8th electric capacity of ground connection;
In described collecting unit, the single-chip microcomputer model is C8051F912; In described collecting unit, storage unit adopts ferroelectric memory FM3130.
Lightning stream testing apparatus of the present invention in use, device is installed in to lightning channel or lightning arrester and enters the ground band iron, getting can coil and signal coil is coupled in lightning channel or lightning arrester enters the ground band iron, when lightning current passes through lightning channel or lightning arrestor movement, signal coil is coupled out lightning current waveform by electromagnetic induction principle (Rogowsky coil), be transformed to voltage signal and keep its peak value through the signal condition unit, then by the collecting unit image data; Now get and can also sense lightning current by coil, the lightning current energy of sensing is via getting the energy processing of circuit, becoming stable 3.3V Voltage-output powers to single-chip microcomputer, under in He Quneng unit, signal condition unit, acting on, in real time polarity, amplitude and the time of origin of lightning current are monitored, result store is at data storage cell.
The system experimentation effect:
1. monitoring effect: when the input waveform is 8us/20us, during 10kA, as shown in Figure 9, the monitor signal obtained as shown in figure 10, as can be seen from Figure: when input 8us/20us lightning current waveform, by just/negative peak holding circuit, amplitude can be kept to 10.8s, for collection provides the sufficient time.
2. getting can effect: when the input waveform as shown in Figure 7 the time, the power supply signal obtained as shown in Figure 8, as can be seen from Figure: as input 8us/20us, during the lightning current waveform of 10kA, through getting the energy cell translation, obtaining output voltage is the 3.3V left and right, and the voltage stabilizing time is 0.4s, meets needed acquisition time fully.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a lightning stream testing apparatus, is characterized in that: comprise ,Qu Neng unit, signal condition unit and collecting unit;
Described signal condition unit, keep for the induction lightening signal and to the thunder and lightning amplitude signal of sensing;
The described energy unit of getting, obtain energy for the lightning current of flowing through from lightning channel, and the stable output energy is the collecting unit energy supply after getting energy unit effect;
Described collecting unit, be used to completing the output signal that gathers and store after the conditioning of signal condition unit.
2. a kind of lightning stream testing apparatus according to claim 1 is characterized in that: described signal adjusts unit to comprise signal coil, integrating resistor, positive polarity peak holding circuit and negative polarity peak holding circuit;
Described signal coil, for induction lightening stream signal;
Described integrating resistor, for signal coil, forming from integrated form, make the direct proportional relation of output voltage signal and lightning current;
Described positive polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the positive polarity lightning current is exported;
Described negative polarity peak holding circuit, respond to for holding coil the amplitude of lightning current signal that the negative polarity lightning current is exported;
The sampling end of described integrating resistor is connected to respectively positive polarity peak holding circuit and negative polarity peak holding circuit, other end ground connection;
The output terminal of described positive polarity peak holding circuit and negative polarity peak holding circuit and the input end of collecting unit link.
3. a kind of lightning stream testing apparatus according to claim 2 is characterized in that: described signal coil adopts from the integration type Rogowsky coil.
4. a kind of lightning stream testing apparatus according to claim 1 is characterized in that: described get can unit comprise get can coil, front end protective device, rectification filtering unit, charging capacitor, voltage-limiting protection unit and voltage regulation unit,
The described energy coil of getting, obtain energy for the induction of the lightning current from the lightning current passage of flowing through;
Described front end protective device, be used to limiting amplitude of lightning current with the protection subsequent conditioning circuit;
Described rectification filtering unit, for rectifying and wave-filtering get can coil the output electric energy;
Described charging capacitor, for storing the electric energy after the rectification filtering unit rectification;
Described voltage-limiting protection unit, be used to limiting the voltage magnitude of voltage regulation unit;
Described voltage regulation unit, for stabilizing to electric energy the 3.3V Voltage-output;
The output terminal of described voltage regulation unit is connected with collecting unit.
5. a kind of lightning stream testing apparatus according to claim 1, it is characterized in that: described collecting unit comprises A/D converter, single-chip microcomputer, clock unit and data storage element;
Described A/D converter is digital signal for the analog signal conversion by the output of signal condition unit;
Described single-chip microcomputer, for collection, the storage of control signal with communicate by letter;
Described clock unit, the time occurred be used to recording lightning current;
Described data storage element, the amplitude signal, lightning current time of origin and the lightning current polarity that collect for storage.
6. a kind of lightning stream testing apparatus according to claim 1, it is characterized in that: also comprise shell, described shell comprises the coil shielding box, gathers shielding box and fixed support, described fixed support is fixed in lightning channel or lightning arrester enters on the ground band iron, described coil shielding box connects as one by the jack mode with gathering shielding box, is positioned on fixed support; Described signal coil and line taking circle are placed in the coil shielding box, ,Qu Neng unit, described signal condition unit, the remainder of collecting unit except coil are placed in the collection shielding box, by plug and coil, become one, then via fixed support, be fixed in various lightning channels or lightning arrester and enter on the ground band iron; Described coil shielding box is divided into two parts up and down of flexible connection, and horizontal and vertical a gap is arranged all; Described fixed support comprises bracket tray, strap and set bolt, and described bracket tray is for placing the coil shielding box, and described strap and set bolt enter the ground band iron for support being fixed in to lightning channel or lightning arrester.
7. a kind of lightning stream testing apparatus according to claim 2, it is characterized in that: described positive polarity peak holding circuit comprises the first diode, the second resistance, the 4th resistance and the first electric capacity, the sampling end of described integrating resistor and the positive pole of the first diode link, the negative pole of described the first diode accesses the Single-chip Controlling unit after with the 4th resistance, connecting, ground connection after described the first diode and the common junction of the 4th resistance connect with the first electric capacity, described the 4th resistance and ground connection after the common junction of Single-chip Controlling unit connects the second resistance;
Described negative polarity peak holding circuit comprises the second diode, the 3rd resistance, the 5th resistance and the second electric capacity, the sampling end of described sample resistance and the positive pole of the second diode link, the negative pole of described the second diode accesses the Single-chip Controlling unit after with the 5th resistance, connecting, described the second diode connects by coil ground connection with the second electric capacity with the common junction of the 5th resistance, described the 5th resistance and ground connection after the common junction of Single-chip Controlling unit connects the 3rd resistance.
8. a kind of lightning stream testing apparatus according to claim 4 is characterized in that: described get can unit the front-end protection unit comprise that access gets the 6th resistance between can coil two output terminals;
Described rectification filtering unit comprises by the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 3rd electric capacity and the 7th resistance; Described the 3rd diode, the 4th diode, the 5th diode and the 6th diode form rectifier bridge, wherein, the negative pole of the positive pole of described the 3rd diode and the 4th diode links, the negative pole of the negative pole of described the 4th diode and the 6th diode links, the negative pole of the positive pole of described the 6th diode and the 5th diode links, and the positive pole of the positive pole of described the 5th diode and the 3rd diode links;
The described output terminal of getting the energy coil accesses respectively the common junction of the 3rd diode and the 4th diode and the common junction of the 5th diode and the 6th diode, described the 3rd electric capacity accesses respectively the common junction of the 4th diode and the 6th diode and the common junction of the 3rd diode and the 5th diode with two ends after the 7th resistance is in parallel, wherein, be connected to an end ground connection of the common junction of the 3rd diode and the 5th diode; The output stage of described rectification filtering unit exports the voltage-limiting protection unit to after connecting the first unidirectional TVS pipe parallel with one another and the 4th electric capacity, and the described first unidirectional TVS pipe and the 4th electric capacity are all in parallel with the 3rd electric capacity and the 7th resistance.
9. a kind of lightning stream testing apparatus according to claim 4, it is characterized in that: described voltage regulation unit comprises voltage stabilizing chip and peripheral circuit thereof; Described voltage stabilizing chip adopts Max5035, the output terminal of described voltage-limiting protection unit is connected to the VIN end of voltage stabilizing chip, between described VIN end and SGND end, be connected with the 8th resistance and the 9th resistance be cascaded, the ON/OFF of described voltage stabilizing chip end with by switch and SGND end, link after the common junction of the 8th resistance and the 9th resistance connects, described VD end passes through that the 7th electric capacity is held with GND respectively and SGND connects rear ground connection; After the BST end of described voltage stabilizing chip passes through the 6th electric capacity and the LX end connects, then by the second unidirectional TVS pipe ground connection; The common junction of described the 6th electric capacity and LX end is connected to the microcontroller power supply input end by the tenth resistance, and the FB end of described voltage stabilizing chip is connected between the tenth resistance and microcontroller power supply input end;
On the input end of described voltage regulation unit, be connected with the 5th electric capacity of ground connection, on the output terminal of described voltage regulation unit, be connected with the 8th electric capacity of ground connection;
10. a kind of lightning stream testing apparatus according to claim 5, it is characterized in that: in described collecting unit, the single-chip microcomputer model is C8051F912; In described collecting unit, storage unit adopts ferroelectric memory FM3130.
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| CN201310373741XA CN103412185A (en) | 2013-08-23 | 2013-08-23 | Lightning current detecting device |
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| CN201310373741XA CN103412185A (en) | 2013-08-23 | 2013-08-23 | Lightning current detecting device |
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| CN103592506A (en) * | 2013-11-30 | 2014-02-19 | 国家电网公司 | On-line monitoring device for lightning current of overhead transmission line |
| CN103795025A (en) * | 2014-01-23 | 2014-05-14 | 重庆四联光电科技有限公司 | Anti-lightning overvoltage protecting circuit |
| CN103969523A (en) * | 2014-04-18 | 2014-08-06 | 南京信息工程大学 | Device capable of automatically monitoring performance of voltage limiting type surge protection device |
| CN103995168A (en) * | 2014-03-18 | 2014-08-20 | 国家电网公司 | Lightning stroke detection device of lightning protection facility |
| CN104267250A (en) * | 2014-10-20 | 2015-01-07 | 武汉大学 | Thunder and lightning waveform on-line monitoring device of high-speed railway overhead line system |
| CN105866522A (en) * | 2016-05-30 | 2016-08-17 | 石家庄汇点科技有限公司 | Starting-type holographic high-pressure wireless current transformer |
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| CN108414843A (en) * | 2018-03-08 | 2018-08-17 | 南方电网科学研究院有限责任公司 | The method of discrimination of the direct lightning strike and inductive lightning of electric-field sensor is integrated based on optics |
| CN109444522A (en) * | 2018-12-27 | 2019-03-08 | 广州开能电气实业有限公司 | Lightning stroke detection trigger circuit |
| CN109904725A (en) * | 2019-02-26 | 2019-06-18 | 北京雷布斯雷电安全科技有限公司 | Thunder and lightning electromagnetism neutralized system |
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| CN103592506A (en) * | 2013-11-30 | 2014-02-19 | 国家电网公司 | On-line monitoring device for lightning current of overhead transmission line |
| CN103795025A (en) * | 2014-01-23 | 2014-05-14 | 重庆四联光电科技有限公司 | Anti-lightning overvoltage protecting circuit |
| CN103995168A (en) * | 2014-03-18 | 2014-08-20 | 国家电网公司 | Lightning stroke detection device of lightning protection facility |
| CN103969523A (en) * | 2014-04-18 | 2014-08-06 | 南京信息工程大学 | Device capable of automatically monitoring performance of voltage limiting type surge protection device |
| CN104267250B (en) * | 2014-10-20 | 2017-04-12 | 武汉大学 | Thunder and lightning waveform on-line monitoring device of high-speed railway overhead line system |
| CN104267250A (en) * | 2014-10-20 | 2015-01-07 | 武汉大学 | Thunder and lightning waveform on-line monitoring device of high-speed railway overhead line system |
| CN105866522A (en) * | 2016-05-30 | 2016-08-17 | 石家庄汇点科技有限公司 | Starting-type holographic high-pressure wireless current transformer |
| CN105866522B (en) * | 2016-05-30 | 2018-08-03 | 石家庄汇点科技有限公司 | Open-type holography high-voltage wireless current transformer |
| CN107682756A (en) * | 2017-11-06 | 2018-02-09 | 广西电网有限责任公司电力科学研究院 | Distribution terminal communication system based on LoRa |
| CN107682756B (en) * | 2017-11-06 | 2023-07-18 | 广西电网有限责任公司电力科学研究院 | LoRa-based power distribution terminal communication system |
| CN108414843A (en) * | 2018-03-08 | 2018-08-17 | 南方电网科学研究院有限责任公司 | The method of discrimination of the direct lightning strike and inductive lightning of electric-field sensor is integrated based on optics |
| CN109444522A (en) * | 2018-12-27 | 2019-03-08 | 广州开能电气实业有限公司 | Lightning stroke detection trigger circuit |
| CN109444522B (en) * | 2018-12-27 | 2024-03-29 | 广州开能电气实业有限公司 | Lightning stroke detection trigger circuit |
| CN109904725A (en) * | 2019-02-26 | 2019-06-18 | 北京雷布斯雷电安全科技有限公司 | Thunder and lightning electromagnetism neutralized system |
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Application publication date: 20131127 |