CN101813738A - Wireless digital power supply line fault alarm device and method - Google Patents
Wireless digital power supply line fault alarm device and method Download PDFInfo
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- CN101813738A CN101813738A CN201010139154A CN201010139154A CN101813738A CN 101813738 A CN101813738 A CN 101813738A CN 201010139154 A CN201010139154 A CN 201010139154A CN 201010139154 A CN201010139154 A CN 201010139154A CN 101813738 A CN101813738 A CN 101813738A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention relates to the technical field of power line detection, in particular to a wireless digital power supply line fault alarm device and a wireless digital power supply line fault alarm method. The device comprises a signal pick-up unit, a processing unit, and an indicating unit, and is characterized in that: the signal pick-up unit comprises a conductive rubber block, a magnetic permeability material and a coil; the conductive rubber block and the magnetic permeability material form a button clamping structure; the coil is wound on the magnetic permeability material to form a current transformer for picking up current and voltage signals; the processing unit comprises a power-off detection unit, a power supply detection unit, a short-circuit detection unit and a grounding detection unit; and the indicating unit comprises a flop unit, an indicator light unit and a radio-frequency unit. The system and the method have the advantages that: 1) wireless signals are uploaded to a control center, so fault points can be accurately positioned in real time; 2) the labor intensity is lightened, and the fault points are quickly transmitted to the control center; and 3) the indication of faults is obvious, and the system and the method are suitable for wide promotion and have important effect of ensuring safe operation of a power grid.
Description
Technical field
The present invention relates to power circuit detection technique field, relate in particular to the wireless digital power supply line fault alarm device and the method for a kind of medium and high voltage power line road indicating fault, warning.
Background technology
Along with the develop rapidly of national economy, the scale of electric system constantly enlarges, and the safety of electric line, stable operation play a part very important to electric system.Behind the line failure, find out the trouble spot as early as possible, fix a breakdown that the safety and stability and the economical operation of electric system had crucial meaning.
At present, traditional line fault warning device of line fault detection has type field fault address device, small current earthing wire-selecting system.Type field fault address device is merely able to detect short trouble can detect the earth fault about short trouble and 40%; The small current earthing wire-selecting system only can detection line earth fault.
Traditional troubleshooting mode does not all realize the failure message upload function, do not possess the fault automatic location function, in case circuit breaks down, need manually to search along the line, troubleshooting difficulty and time have been increased, and utilize distribution automation system can realize the automatic location of fault, but cost is too big, is difficult to promote.Therefore, utilize means of communication simple, with low cost that the failure message that fault detector collected is uploaded to system of robotization main website, thereby the automatic location of realizing fault section is very necessary.
Summary of the invention
The purpose of this invention is to provide a kind of wireless digital power supply line fault alarm device and method, be used for detecting, indicate, transmit fault-signal and send long-range indication and report to the police, make the maintainer can accurately differentiate the interval that fault takes place, improve the ability of fault analysis, so that fix a breakdown rapidly, dwindle power supply interrupted district, shorten power off time.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of wireless digital power supply line fault alarm device, comprise signal pick-up unit, processing unit, indicating member, it is characterized in that, described signal pick-up unit comprises conductive rubber block, permeability magnetic material and coil, conductive rubber block and permeability magnetic material are formed the button clamp structure, and coil constitutes the current transformer that picks up electric current, voltage signal on permeability magnetic material; Described processing unit comprises power failure detecting unit respectively, send the electro-detection unit, short-circuit detecting unit, ground connection detecting unit; Described indicating member comprises board turning unit, indicator unit, radiofrequency signal unit respectively.
A kind of alarm method of wireless digital power supply line fault alarm device, on the main line ABC of supply line three-phase respectively successively multiple spot some warning devices are set, the moment of breaking down, signal pick-up unit picks up abnormal current, magnitude of voltage, failure judgement type after the processing unit analysis, trigger indicating member and send light, board turning rotation, radio frequency signal warning simultaneously, described wireless signal carries fault type and faulty section coded message, and pass through the SMARTRF technology transfer to control center, this device earth fault operation condition is:
1) ground connection moment capacitance current 〉=3A;
2) ground connection phase-to-ground voltage rate of change＞40%;
3) lead does not cut off the power supply;
This device short trouble operation condition:
1) the direct mutation value 〉=200A of detection electric current;
2) line voltage distribution is zero, U=0.
The particular circuit configurations of described signal pick-up unit, processing unit, display unit is described below:
In the signal pick-up unit loop, coil 1-L1 one end links to each other with electric capacity 1-C9, resistance 1-R14 successively, constitute high-frequency filter circuit, resistance 1-R15, diode 1-D8 pressure limiting are connected to the base stage of 1-T2,1-R13,1-C11 forms oscillatory circuit, 1-R13 links to each other with 1-R5, is connected to VCC, and the 1-T2 collector is connected to 1 pin of U6 by pickup point A; Coil 1-L1 two ends also connect to form high-pass filtering with electric capacity 1-C1,1-R1,1-R2, again through 1-D1,1-D2,1-D4, the filtering of 1-D5 bridge-type, export electric capacity 1-C2 to, through resistance 1-R4, be connected to 1 pin of optocoupler U9, the 2 pin ground connection GND of U9,3 pin of U9 are pickup point C, 4 pin ground connection GND, pickup point C links to each other with battery VCC through resistance 1-R3,1-R5,1-D7, and pickup point C is connected to 13 pin of U6 through resistance 2-R9; The base stage of triode 1-T2 links to each other with diode 1-D9, through resistance 1-R17, and through 1-C8 filtering, with resistance 1-R16, electric capacity 1-C11 constitutes oscillatory circuit, export the base stage of triode 1-T3 to, the collector of triode 1-T3 meets pickup point D, pickup point D is by electric capacity 2-C8 ground connection, link to each other with 5 pin of U6 by resistance 2-R10, simultaneously, pickup point D is connected to VCC by resistance 1-R5, diode 1-D10 plus earth GND, diode 1-D11, the anti-phase isolation of resistance 1-R18, pickup point B is by resistance 1-R5,1-R10 links to each other with VCC, is connected to triode 1-T1 collector, the output termination GND of 1-T1, base stage meets GND by resistance 1-R11, and inductance capacitance 1-C1 is through diode 1-D3 in the coil, 1-D6 is through resistance 1-R6,1-R7,1-R8,1-R9 electric capacity 1-C3,1-C4,1-C5, the capacitance-resistance filter that 1-C6 forms, by resistance 1-R12,1-C7 connects the 1-T1 base stage of triode successively;
In the processing unit loop, the anti-phase output of 2 pin of U6 is connected to 3 pin of U4, and 4 pin of U4 also link to each other with 1 pin of U4 by resistance 2-R4 by electric capacity 2-C7 ground connection, 5 pin of U4 link to each other with VCC, 2 pin of U4 link to each other by resistance 3-R5 with signaling point E, and U4 is connected into single-shot trigger circuit, and 10 pin of U4 link to each other with 13 pin of U4 by resistance 2-R6, and by electric capacity 2-C5 ground connection, 9 pin link to each other with VCC, and 8 pin of U4 link to each other with ground GND, 12 pin of U4 with link to each other with signaling point F by 3-R6; 4 pin of U6 link to each other with 11 pin of U4, anti-phase 3 pin that export U6 to of 2 pin of U6, anti-phase again 4 pin that export U6 to, 13 pin of U6 are connected to picking up signal point C through resistance 2-R9,12 pin of U6 link to each other with 5 pin of U2,6 pin of U2 link to each other with ground GND, 3 pin of U2 link to each other with 4 pin of U6,2 pin of U2 link to each other with signaling point G, and 4 pin of U2 link to each other with 1 pin of U3, and 6 pin of U6 link to each other with 11 pin of U2,10 pin of U2 link to each other with 1 pin of U3,12 pin link to each other with signaling point H by resistance 3-R8, and 9 pin of U2 link to each other with 11 pin of U5, and 8 pin of U2 link to each other with ground GND; 11 pin of U5 are output terminal, its input end 13 pin link to each other with 3 pin of U5, input end 12 pin link to each other with 12 of U2,3 pin of U5 are output terminal, its input end 1 pin links to each other with 8 pin of U6, input end 2 pin link to each other with 2 pin of U6,9 pin of U6 link to each other with pickup point B by resistance 2-R8,1 pin of U1 links to each other with resistance 2-R1 one end, the other end of resistance 2-R1 links to each other with 2 pin of U1 by electric capacity 2-C1, also pass through resistance 2-R2 successively with 3 pin of U1,5 pin of U1,12 pin of U1,13 pin of U1, VCC links to each other, 9 pin of U1,10 pin link to each other with GND, wherein 6 pin of U1 link to each other by resistance 2-R3 with 2 pin of U3, and link to each other with ground GND by electric capacity 2-C4,5 pin of U3 are connected to VCC, 6 pin of U3 be connected to GND, 4 pin of U3 link to each other by resistance 2-R5 with 8 pin of U1,1 pin of U3 links to each other with 11 pin of U3,1 pin of U3 and 4 pin of U2,10 pin link to each other, and 9 pin of U3 link to each other with VCC, 8 pin of U3 link to each other with GND, and 10 pin of U3 link to each other with 4 pin of U3;
In the display unit loop, board turning element circuit structure is: 8 pin of U1 link to each other with the base stage of triode 3-T1 by 2-D1,2-R1, and the collector of triode 3-T1 meets the X end of flip coils 3-L5, the emission termination GND of triode 3-T1; 13 pin of U3 link to each other by resistance 3-R2 with the base stage of triode 3-T2, and the transmitting terminal of triode 3-T2 links to each other with ground GND, and the collector terminal of 3-T2 links to each other with the Y end of flip coils 3-L5;
The indicator unit circuit structure is: 4 pin of U2 link to each other with 1 pin of U3, also link to each other with triode 3-T3 base stage by resistance 3-R3, and triode 3-T3 grounded emitter, triode 3-T3 collector links to each other by resistance 3-R4, light emitting diode 3-D1 successively;
Radiofrequency signal element circuit structure is: signaling point E, signaling point F, signaling point G, signaling point H is connected to 16 of U8 respectively, 17 of U8,27 of U8,26 pin of U8,7 of U8,8 pin of U8 meet crystal oscillator 3-J1, and by electric capacity 3-C1,3-C2 ground connection, 11 of U8,12 of U8,13 of U8,23 of U8,24 of U8,25 pin of U8 are correspondence and 7 of U7 respectively, 6 of U7,5 of U7,2 of U7,1 of U7,20 pin of U7 link to each other, 8 pin of U7,10 pin of U7 meet crystal oscillator 3-J2,13 pin of U7 are by electric capacity 3-C7 ground connection GND, and connection inductance 3-L1,12 pin of U7 meet electric capacity 3-C8 again and receive the other end of 3-L1 and meet electric capacity 3-C11 and meet GND, be connected to inductance 3-L4 one end, the inductance 3-L4 other end is tandem electric inductance 3-L3 successively, electric capacity 3-C10 is to ground GND, and 3-L3 serial connection electric capacity 3-C9 is connected to antenna terminal.
In a single day compared with prior art, the advantage of this patent is: 1) break down, utilize wireless signal to upload to control center, can accurately locate the trouble spot in real time, thereby handle and solve the supply lines fault rapidly, improved production efficiency greatly; 2) reduce labor intensity, the signal transmission is fast, utilizes radio frequency signal and GPRS module, rapidly the trouble spot is delivered to control center; 3) phenomenon of the failure is obvious, has pilot lamp and direction board to show and is easy to install, and the opening current transformer utilizes the button assembling, and is cheap, is suitable for extensive popularization, to guaranteeing electric power netting safe running, improves grid supply quality and plays an important role.
Description of drawings
Fig. 1 is a wireless digital power supply line fault alarm device theory structure synoptic diagram;
Fig. 2 is that wireless digital power supply line fault alarm device is used exemplary plot;
Fig. 3 is the circuit theory diagrams of wireless digital power supply line fault alarm device.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
See Fig. 1, a kind of wireless digital power supply line fault alarm device, comprise signal pick-up unit, processing unit, indicating member, described signal pick-up unit comprises conductive rubber block 1, permeability magnetic material 2 and coil 3, conductive rubber block 1 and permeability magnetic material 2 are formed the button clamp structure, are clamped on the exposed electrical lead 4, and coil 3 constitutes the current transformer that picks up electric current, voltage signal on permeability magnetic material 2; Described processing unit comprises power failure detecting unit respectively, send the electro-detection unit, short-circuit detecting unit, ground connection detecting unit; Described indicating member comprises board turning unit, indicator unit, radiofrequency signal unit respectively.The signal pick-up unit pickoff signals uses for the digit chip of processing unit, processing unit sums up working condition in the signal combination scene and send electric signal, power-off signal, short-circuit signal, ground signalling, indicating member sends the board turning rotation simultaneously according to signal, and flashing light sends less radio-frequency.
See Fig. 2, on the high-tension line, 1-9 of the present invention place is set, when trouble spot (AL point) when breaking down, 9 place devices are emission radio frequency signals rapidly simultaneously, 6# point apparatus wherein, and it is consistent with voltage direction that electric current is accepted in its inside, and electric current and voltage reversal that the 9# point apparatus is flow through, so control center rapidly fault location point (AL point) be between 6#, the 9# point.
See Fig. 3, circuit theory diagrams of the present invention are made Rapid Alarm at common current supply circuit fault as sending electricity, power failure, short circuit, ground connection, and circuit structure is described below respectively:
In the following signal pick-up unit, A is that circuit stops sending electric pickup point, and B is a circuit capacity current pickup point, and C is big current break pickup point, and D is the first half-wave pickup point of line voltage distribution, and wherein U9 is optocoupler P521.
U1 is chip CD4541 in the processing unit, and U2 is chip HEF4013, and U3 is chip HEF4013, and U4 is chip HEF4013, and U5 is chip HEF4093, and U6 is chip HEF40106.Power cut signal unit wherein, mainly finish by first group of D type flip chip of U4, send the electrical signal detection unit mainly to finish by second group of D flip-flop of U4, the short-circuit signal detecting unit is finished the triggering of short-circuit signal by first group of trigger of U2, and the ground signalling detecting unit is finished the triggering of ground signalling by second group of trigger of U2; U6 finishes picking up signal to become square-wave signal, and U5 is the combination logic function that four schmidt trigger circuits are finished signal, and wherein, U3 and U1 also finish the function of indicating member board turning timing, handles as the clock of board turning input signal.
Indicating member comprises board turning unit, indicator unit, radiofrequency signal unit, and the board turning unit mainly is made of permanent magnetism pointer rotating disk and peripheral circuit; Indicator unit is both by triode 3-T3 driven for emitting lights diode 3-D1; U7 is chip CC1100 in the radiofrequency signal unit, U8 is singlechip chip ATMEGA88PA, E is that circuit send the electric signal tie point, F is a circuit power-off signal tie point, and G is a line short signal tie point, and H is a line-to-ground signal tie point, be in dormant state when U8 is flat, when above-mentioned signal became low level by high level, U8 resetted and wakes up, drove U7 CC1100 emission rf data.
Specifically describe when sending electric signal, power-off signal, short-circuit signal, ground signalling generation alarm procedure of the present invention below:
1, send electrical signal detection, bare conductor is directly in the number of the winning the confidence output loop, sine wave signal is by electric capacity 1-C9, resistance 1-R14 filters high frequency, and by resistance 1-R15, diode 1-D8 pressure limiting, be connected to the base stage of triode 1-T2, resistance 1-R13, electric capacity 1-C11 forms oscillatory circuit, and resistance 1-R13 links to each other with 1-R5, is connected to VCC, triode 1-T2 collector is connected 1 pin of U6 with picking up signal point A, the anti-phase output of 2 pin of U6 is connected to 3 pin of U4, U4 4 with by electric capacity 2C7 ground connection, link to each other with 1 pin of U4 by resistance 2-R4,5 pin of U4 link to each other with VCC, and 2 pin of U4 link to each other by resistance 3-R5 with sending electric signal point E.Wherein, U4 is connected into single-shot trigger circuit, after the energized, is in stable state, its output pin Q1=0, Q1=1.
When supply line restored electricity, triode 1-T2 current collection is square-wave signal very, adjusted oscillatory circuit and made A point=0, produce a negative edge, the 3 pin CP end of U4 produces a rising edge, the 6 pin S1=0 of U4, the 4 pin R1=0 of U4, the 5 pin D1=1 of U4, the 2 pin Q1=0 of U4 at this moment, Q1=1, the 1 pin Q1 of U4 charges to 2-C7 through resistance 2-R4, and fixed length is after the time, the 4 pin R1=1 of U4, after this U4 resets, the 2 pin Q1=1 of U4, the 3 pin Q1=0 of U4.The E point obtains a low level square-wave pulse signal in this course, thereby send electric signal to produce.
2, power cut signal detects, picking up signal A point, be connected to 1 pin of U6, anti-phase 3 pin that export U6 to of 2 pin of U6, anti-phase again 4 pin that export U6 to, 4 pin of U6 link to each other with 11 pin of U4, and 10 pin of U4 link to each other with 13 pin by resistance 2-R6, and by electric capacity 2-C5 ground connection, 9 pin link to each other with VCC, and 8 pin of U4 link to each other with ground GND, 12 pin of U4 with link to each other with the F point by 3-R6.After wherein U4 is connected into the single-shot trigger circuit energized, be in stable state, its output pin Q2=0,
When supply line has a power failure suddenly, picking up signal point A=1, rising edge appears in the A point, and the 11 pin CP of U4 produce rising edge, the 8 pin S2=0 of U4, the 9 pin D2=1 of U4, the 10 pin R2=0 of U4, at this moment, the 13 pin Q2=1 of U4,12 pin of U4
Next, the 13 pin Q2 of U4 give electric capacity 2-C5 charging by resistance 2-R6, and fixed length is after the time, the 10 pin R2=1 of U4, and after this U4 resets, the 13 pin Q2=0 of U4,12 pin of U4
Signaling point F obtains a low level square-wave pulse signal in this course, thereby power-off signal produces.
3, short-circuit signal detects, and realizes that mainly principle is: within a certain period of time, bigger mutation current occurs; and follow protectiveness outage action; coil 1-L1 is from supply line's induction sense circuit signal, after electric capacity 1-C1,1-R1,1-R2 high-pass filtering, again through diode 1-D1,1-D2,1-D4, the filtering of 1-D5 bridge-type; export electric capacity 1-C2 to; through resistance 1-R4, be connected to 1 pin of optocoupler U9, the 2 pin ground connection GND of U9; 3 pin of U9 are picking up signal point C, 4 pin ground connection GND.Picking up signal point C links to each other with battery VCC through resistance 1-R3,1-R5,1-D7, picking up signal point C is connected to 13 pin of U6 through resistance 2-R9,12 pin of U6 link to each other with 5 pin of U2,6 pin of U2 link to each other with ground GND, and 3 pin of U2 link to each other with 4 pin of U6, and 2 pin of U2 link to each other with signaling point G, 4 pin of U2 link to each other with 1 pin of U3, U2 is in reset mode, its output pin Q1=0, Q1=1 after sending electricity
When being short-circuited in the circuit, big electric current results from the 1-C2 both sides, and the 1-C2 discharge makes the one end conducting of U9 optocoupler, picking up signal point C point=0,12 pin and the picking up signal point C point of U6 are anti-phase, make the 5 pin D1=1 of U2, and this moment, U3 was positioned at the 4 pin R1=0 of its output=U2 of reset mode, the 6 pin S1=0 of U2, this moment, the 3 pin CP of U2 held when having power-off signal to give birth to, and U2 exports Q1=1
The G point is sent short-circuit signal, the U3 timing that is triggered, U2 after U3 resets, the Q1=1 of the R1=U3 of U2, U2 is reset, U2 exports Q1=0, Q1=1, thereby G point short circuit low level square-wave pulse signal produces and finishes.
4, ground signalling detects, the main principle that realizes is: line voltage distribution reduces over the ground＞and 40% o'clock, the capacitive discharge electric current reaches more than the 3A, and the phenomenon of not cutting off the power supply, supply line's voltage signal is through 1-C9,1-R14, the first half-wave voltage signal of circuit is delivered to 1-D9, through resistance 1-R17, and through 1-C8 filtering, to 1-R16,1-C11 formation oscillatory circuit, export the base stage while of triode 1-T3 to, the collector of 1-T3 meets signaling point D, and the D point links to each other with 5 pin of U6 by 2-R10 by electric capacity 2-C8 ground connection, simultaneously, the D point is connected to VCC by 1-R5.Inversion signal flow to GND through 1-D10,1-D11, the anti-phase isolation of 1-R8; 6 pin of U6 link to each other with 11 pin of U2, and 10 pin of U2 link to each other with 1 pin of U3, and 12 pin link to each other with the H point by resistance 3-R8, and 9 pin of U2 link to each other with 11 pin of U5, and 8 pin of U2 link to each other with GND; 11 pin of U5 are output terminal, and its input end 13 pin link to each other with 3 pin of U5, and input end 12 pin link to each other with 12 of U2,3 pin of U5 are output terminal, its input end 1 pin links to each other with 8 pin of U6, and input end 2 pin link to each other with 2 pin of U6, and the 9 pin 2-R8 of U6 link to each other with picking up signal point B point; Picking up signal point B point links to each other with VCC by resistance 1-R5,1-R10, be connected to triode 1-T1 collector, the output termination GND of 1-T1, base stage meets GND by resistance 1-R11, inductance capacitance 1-C1 among the coil 1-L1 is through diode 1-D3,1-D6, capacitance-resistance filter through resistance 1-R6,1-R7,1-R8,1-R9 electric capacity 1-C3,1-C4,1-C5,1-C6 form removes high-frequency signal output capacitance electric current to resistance 1-R12, and electric capacity 1-C7 connects the 1-T1 base stage of triode.U2 is in reset mode, its output pin Q2=0,
During electric line generation earth fault, line side voltage reduces, line signal forms high level signal over the ground through 1-R16,1-C11, make triode 1-T3 conducting, picking up signal point D electric capacity step-down produces a negative edge, 5 pin of the 6 pin output rising edge discharge U6 of U6 become low level by high level, its anti-phase output 6 pin output rising edge, CP=1 rising edge appears, in 11 pin of U2; This moment, U3 was positioned at reset mode, output Q1=0, the 10 pin R2=0 of U2, the 8 pin S2=0 of U2, the 11 pin M of the 9 pin D2=U5 of U2; 11 pin of U5
13 pin of U5
8 pin of the 1 pin A=U6 of U5, this moment capacitance current output signal turn-on transistor 1-T1, pickup point B=0, the 8 pin output high level of U6, the 2 pin B points of U5 have electric signal=1 for circuit; The value of 9 pin of U2 is taken from following formula:
When the circuit jump signal triggers 11 pin of U2, by above-mentioned formula, i.e. Q1=2,
The H point is sent ground signalling, and after U3 was triggered, U3 resetted, and the 10 pin R2=1 U2 of U2 are reset, and U2 exports Q1=0, Q1=1, thus the generation of H point ground connection low level square-wave pulse signal finishes.
When above-mentioned fault took place, the present invention can provide the generation of board turning, flashing light, transmission less radio-frequency indication fault, and implementation method is as described below:
1 pin of U1 links to each other with resistance 2-R1 one end, the other end of resistance 2-R1 links to each other with 2 pin of U1 by electric capacity 2-C1, also link to each other with 3 pin of U1 by resistance 2-R2,5 pin link to each other with 12 pin, 13 pin, VCC, 9 pin, 10 pin of U1 link to each other with GND, wherein 6 pin of U1 link to each other by resistance 2-R3 with 2 pin of U3, and link to each other with GND by electric capacity 2-C4,8 pin of U1 link to each other with the base stage of triode 3-T1 by 2-D1,2-R1, the collector of 3-T1 meets the X end of flip coils 3-L5, the emission termination GND of triode 3-T1; 8 pin of U5 connect short-circuit signal, 9 pin of U5 connect ground signalling, and 10 pin of U5 are output terminal, are connected to the 3 pin CP end of U3,5 pin of U3 are connected to VCC, 6 pin of U3 are connected to GND, and 4 pin of U3 link to each other with 8 pin of U1, and 1 pin of U3 links to each other with 11 pin of 3 pin of U2, U2,1 pin of U3 links to each other with 11 pin, 13 pin of U3 link to each other by resistance 3-R2 with the base stage of triode 3-T2, and the transmitting terminal of triode 3-T2 links to each other with ground GND, and the collector terminal of 3-T2 links to each other with the Y end of flip coils 3-L5; 9 pin of U3 link to each other with VCC, and 8 pin of U3 link to each other with GND, and 10 pin of U3 link to each other by 4 pin of U3.U1 is single-cycle mode of operation, and U1 is in reset mode, Q point output high level, and the R=1 of U3 is operated in reset mode, the 1 pin Q1=0 of U3,2 pin Q1=1, triode 3-T1 ends.The 13 pin Q2=0 of U3, the 12 pin Q1=1 of U3, triode 3-T2 ends.
Be short-circuited or during earth fault 10 pin of U5 output high level, i.e. 3 pin of U3 input rising edge, the 3 pin CP1=1 of U3, the 1 pin Q1=1 of U3, the 2 pin Q1=0 of U3, (short circuit this moment and ground signalling are reset), the 6 pin step-down level of U1, U1 enters count mode, and gate time is by 1 pin of U1, the 2 pin decision of U1: t=2.3*R2-R1*C2-C1, at this moment, 8 pin output low level during counting of U1, triode 3T1 ends, and does not control flip coils 3-L5; The 11 pin output rising edge of U3, the 11 pin CP2=1 of U3, the 10 pin R2=0 of U3, the 9 pin D2=1 of U3, the 8 pin S2=0 of U3, U3 is triggered, the 13 pin Q2=1 of U3, triode 3-T2 conducting, have forward current to flow through among the flip coils 3-L5, flip coils 3L5 turns to Y, makes the permanent magnetism pointer rotate and realizes routing up direction board, this moment, the Q1 of U3 exported high level, through the base stage of 3-R3 to triode 3-T3, the bright lamp of triode 3-T3 conducting pilot lamp 3-D1, one termination VCC, the other end connects the collector of triode 3-T3 through resistance, and triode 3-T3 emitter exports GND to; After the U1 gate time had been expired, Q exported high level, and U3 is resetted, the 1 pin Q1=0 of U3, the 2 pin Q1=1 of U3, electric current flow to triode 3-T1 base stage through resistance 3-R1, makes triode 3-T1 conducting, the 13 pin Q2=0 of U3, triode 3-T2 ends, and pilot lamp 3-D1 turn-offs, and has negative current to flow through among the flip coils 3-L5, flip coils 3-L5 turns to X, makes the permanent magnetism pointer rotate and realizes no indication state.
The implementation method of output radio frequency signal is as described below:
Signaling point E, F, G, H are connected to 16 pin, 17 pin, 27 pin, 26 pin of U8 respectively, and 7 pin, 8 pin of U8 meet crystal oscillator 3-J1, and by electric capacity 3-C1,3-C2 ground connection, single-chip microcomputer U8 is in power-down state, use interruption to wake mode up and work.11 pin of U8,12 pin, 13 pin, 23 pin, 24 pin, 25 pin are corresponding respectively to link to each other with 7 pin, 6 pin, 5 pin, 2 pin, 1 pin, 20 pin of U7,8 pin, 10 pin of radio frequency chip U7 meet crystal oscillator 3-J2,13 pin of U7 meet GND by 3-C7, and connect 3-L1 one end, 12 pin of U7 meet 3-C8 again and receive the other end of 3-L1 and meet electric capacity 3-C11 ground connection GND, and connect inductance 3-L4 one end, another termination inductance of inductance 3-L4 3-L3, and meeting electric capacity 3-C10 to GND, inductance 3-L3 links to each other with antenna terminal after meeting electric capacity 3-C9.
When negative edge appears in above-mentioned signal, wake single-chip microcomputer U8 up, single-chip microcomputer U8 control U7 output radiofrequency signal, thus realize the less radio-frequency transmission.
Claims (3)
1. wireless digital power supply line fault alarm device, comprise signal pick-up unit, processing unit, indicating member, it is characterized in that, described signal pick-up unit comprises conductive rubber block, permeability magnetic material and coil, conductive rubber block and permeability magnetic material are formed the button clamp structure, and coil constitutes the current transformer that picks up electric current, voltage signal on permeability magnetic material; Described processing unit comprises power failure detecting unit respectively, send the electro-detection unit, short-circuit detecting unit, ground connection detecting unit; Described indicating member comprises board turning unit, indicator unit, radiofrequency signal unit respectively.
2. the alarm method of the described a kind of wireless digital power supply line fault alarm device of claim 1, it is characterized in that, on the main line ABC of supply line three-phase respectively successively multiple spot some warning devices are set, the moment of breaking down, signal pick-up unit picks up abnormal current, magnitude of voltage, failure judgement type after the processing unit analysis, trigger indicating member and send light, board turning rotation, radio frequency signal warning simultaneously, described wireless signal carries fault type and faulty section coded message, and passes through the SMARTRF technology transfer to control center;
This device earth fault operation condition is:
1) ground connection moment capacitance current 〉=3A;
2) ground connection phase-to-ground voltage rate of change＞40%;
3) lead does not cut off the power supply;
This device short trouble operation condition is:
1) the direct mutation value 〉=200A of detection electric current;
2) line voltage distribution is zero, U=0.
3. a kind of wireless digital power supply line fault alarm device according to claim 1 and 2 is characterized in that, the particular circuit configurations of described signal pick-up unit, processing unit, display unit is described below:
In the described signal pick-up unit, coil 1-L1 one end links to each other with electric capacity 1-C9, resistance 1-R14 successively, constitute high-frequency filter circuit, resistance 1-R15, diode 1-D8 pressure limiting are connected to the base stage of 1-T2,1-R13,1-C11 forms oscillatory circuit, 1-R13 links to each other with 1-R5, is connected to VCC, and the 1-T2 collector is connected to 1 pin of U6 by pickup point A; Coil 1-L1 two ends also connect to form high-pass filtering with electric capacity 1-C1,1-R1,1-R2, again through 1-D1,1-D2,1-D4, the filtering of 1-D5 bridge-type, export electric capacity 1-C2 to, through resistance 1-R4, be connected to 1 pin of optocoupler U9, the 2 pin ground connection GND of U9,3 pin of U9 are pickup point C, 4 pin ground connection GND, pickup point C links to each other with battery VCC through resistance 1-R3,1-R5,1-D7, and pickup point C is connected to 13 pin of U6 through resistance 2-R9; The base stage of triode 1-T2 links to each other with diode 1-D9, through resistance 1-R17, and through 1-C8 filtering, with resistance 1-R16, electric capacity 1-C11 constitutes oscillatory circuit, export the base stage of triode 1-T3 to, the collector of triode 1-T3 meets pickup point D, pickup point D is by electric capacity 2-C8 ground connection, link to each other with 5 pin of U6 by resistance 2-R10, simultaneously, pickup point D is connected to VCC by resistance 1-R5, diode 1-D10 plus earth GND, diode 1-D11, the anti-phase isolation of resistance 1-R18, pickup point B is by resistance 1-R5,1-R10 links to each other with VCC, is connected to triode 1-T1 collector, the output termination GND of 1-T1, base stage meets GND by resistance 1-R11, and inductance capacitance 1-C1 is through diode 1-D3 in the coil, 1-D6 is through resistance 1-R6,1-R7,1-R8,1-R9 electric capacity 1-C3,1-C4,1-C5, the capacitance-resistance filter that 1-C6 forms, by resistance 1-R12,1-C7 connects the 1-T1 base stage of triode successively;
In the described processing unit, the anti-phase output of 2 pin of U6 is connected to 3 pin of U4, and 4 pin of U4 also link to each other with 1 pin of U4 by resistance 2-R4 by electric capacity 2-C7 ground connection, 5 pin of U4 link to each other with VCC, 2 pin of U4 link to each other by resistance 3-R5 with signaling point E, and U4 is connected into single-shot trigger circuit, and 10 pin of U4 link to each other with 13 pin of U4 by resistance 2-R6, and by electric capacity 2-C5 ground connection, 9 pin link to each other with VCC, and 8 pin of U4 link to each other with ground GND, 12 pin of U4 with link to each other with signaling point F by 3-R6; 4 pin of U6 link to each other with 11 pin of U4, anti-phase 3 pin that export U6 to of 2 pin of U6, anti-phase again 4 pin that export U6 to, 13 pin of U6 are connected to picking up signal point C through resistance 2-R9,12 pin of U6 link to each other with 5 pin of U2,6 pin of U2 link to each other with ground GND, 3 pin of U2 link to each other with 4 pin of U6,2 pin of U2 link to each other with signaling point G, and 4 pin of U2 link to each other with 1 pin of U3, and 6 pin of U6 link to each other with 11 pin of U2,10 pin of U2 link to each other with 1 pin of U3,12 pin link to each other with signaling point H by resistance 3-R8, and 9 pin of U2 link to each other with 11 pin of U5, and 8 pin of U2 link to each other with ground GND; 11 pin of U5 are output terminal, its input end 13 pin link to each other with 3 pin of U5, input end 12 pin link to each other with 12 of U2,3 pin of U5 are output terminal, its input end 1 pin links to each other with 8 pin of U6, input end 2 pin link to each other with 2 pin of U6,9 pin of U6 link to each other with pickup point B by resistance 2-R8,1 pin of U1 links to each other with resistance 2-R1 one end, the other end of resistance 2-R1 links to each other with 2 pin of U1 by electric capacity 2-C1, also pass through resistance 2-R2 successively with 3 pin of U1,5 pin of U1,12 pin of U1,13 pin of U1, VCC links to each other, 9 pin of U1,10 pin link to each other with GND, wherein 6 pin of U1 link to each other by resistance 2-R3 with 2 pin of U3, and link to each other with ground GND by electric capacity 2-C4,5 pin of U3 are connected to VCC, 6 pin of U3 be connected to GND, 4 pin of U3 link to each other by resistance 2-R5 with 8 pin of U1,1 pin of U3 links to each other with 11 pin of U3,1 pin of U3 and 4 pin of U2,10 pin link to each other, and 9 pin of U3 link to each other with VCC, 8 pin of U3 link to each other with GND, and 10 pin of U3 link to each other with 4 pin of U3;
In the described display unit loop, board turning element circuit structure is: 8 pin of U1 link to each other with the base stage of triode 3-T1 by 2-D1,2-R1, and the collector of triode 3-T1 meets the X end of flip coils 3-L5, the emission termination GND of triode 3-T1; 13 pin of U3 link to each other by resistance 3-R2 with the base stage of triode 3-T2, and the transmitting terminal of triode 3-T2 links to each other with ground GND, and the collector terminal of 3-T2 links to each other with the Y end of flip coils 3-L5;
The indicator unit circuit structure is: 4 pin of U2 link to each other with 1 pin of U3, also link to each other with triode 3-T3 base stage by resistance 3-R3, and triode 3-T3 grounded emitter, triode 3-T3 collector links to each other by resistance 3-R4, light emitting diode 3-D1 successively;
Radiofrequency signal element circuit structure is: signaling point E, signaling point F, signaling point G, signaling point H is connected to 16 of U8 respectively, 17 of U8,27 of U8,26 pin of U8,7 of U8,8 pin of U8 meet crystal oscillator 3-J1, and by electric capacity 3-C1,3-C2 ground connection, 11 of U8,12 of U8,13 of U8,23 of U8,24 of U8,25 pin of U8 are correspondence and 7 of U7 respectively, 6 of U7,5 of U7,2 of U7,1 of U7,20 pin of U7 link to each other, 8 pin of U7,10 pin of U7 meet crystal oscillator 3-J2,13 pin of U7 are by electric capacity 3-C7 ground connection GND, and connection inductance 3-L1,12 pin of U7 meet electric capacity 3-C8 again and receive the other end of 3-L1 and meet electric capacity 3-C11 and meet GND, be connected to inductance 3-L4 one end, the inductance 3-L4 other end is tandem electric inductance 3-L3 successively, electric capacity 3-C10 is to ground GND, and 3-L3 serial connection electric capacity 3-C9 is connected to antenna terminal.
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| CN102590581A (en) * | 2012-01-12 | 2012-07-18 | 航天科工深圳（集团）有限公司 | Device for detecting power failure |
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| CN104539049A (en) * | 2014-12-26 | 2015-04-22 | 广州大中电力技术有限公司 | Remote power supply system and cable short circuit fault positioning method |
| CN104539049B (en) * | 2014-12-26 | 2016-08-24 | 广州大中电力技术有限公司 | Remote feeding power system and the localization method of cable short trouble |
| CN106556766A (en) * | 2016-10-11 | 2017-04-05 | 国网上海市电力公司 | A kind of distribution network failure monitoring system based on distribution line multidate information |
| CN106569089A (en) * | 2016-10-11 | 2017-04-19 | 国网上海市电力公司 | Power distribution line dynamic Information-based power distribution network fault monitoring method |
| CN106501671A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring method of electric distribution network overhead wire failure |
| CN106501657A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of monitoring system of electric distribution network overhead wire failure |
| CN106501656A (en) * | 2016-10-12 | 2017-03-15 | 国网上海市电力公司 | A kind of on-line acquisition system of distribution line failure waveform |
| CN106556754A (en) * | 2016-10-12 | 2017-04-05 | 国网上海市电力公司 | A kind of online acquisition method of distribution line failure waveform |
| CN110376481A (en) * | 2019-06-26 | 2019-10-25 | 威胜信息技术股份有限公司 | Low voltage failure sensor and method are based on edge calculations low voltage failure detection system |
| CN110888022A (en) * | 2019-12-20 | 2020-03-17 | 海南电网有限责任公司电力科学研究院 | Single-phase earth fault detection and positioning device for power distribution network |
| CN110888022B (en) * | 2019-12-20 | 2021-10-08 | 海南电网有限责任公司电力科学研究院 | Single-phase earth fault detection and positioning device for power distribution network |
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