CN204256096U - A kind of distribution line takes precautions against maloperation pick-up unit - Google Patents
A kind of distribution line takes precautions against maloperation pick-up unit Download PDFInfo
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- CN204256096U CN204256096U CN201420792667.5U CN201420792667U CN204256096U CN 204256096 U CN204256096 U CN 204256096U CN 201420792667 U CN201420792667 U CN 201420792667U CN 204256096 U CN204256096 U CN 204256096U
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- distribution line
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- 230000001939 inductive effect Effects 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000005674 electromagnetic induction Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The utility model discloses a kind of distribution line and take precautions against maloperation pick-up unit.Its principle of work be by electromagnetic coupled apply in measuring circuit one ac-excited, and by the electric current in electromagnetic induction measuring circuit, through controller analyzing and processing impedance loop; Control diemaker judges according to reactive power throughput direction and loop resistance values and whether there is the temporary ground wire leaking and tear open in circuit; The position of leaking the temporary ground wire torn open can be shown further in conjunction with the pole tower ground resistance of input and essential parameter of circuit and loop resistance values, the temporary ground wire Lou torn open is removed rapidly to facilitate maintainer, ensure the success ratio of combined floodgate power transmission, improve the safety operation level of electrical network.
Description
Technical field
The utility model belongs to power distribution line maintenance technical field, is specifically that a kind of distribution line takes precautions against maloperation pick-up unit.
Background technology
Distribution line dielectric level is not as good as transmission line of electricity, and direct user oriented, complex circuit is various, broad covered area, easily breaks down, and often needs interruption maintenance.When distribution line interruption maintenance, for ensureing the person and device security, grounding can be carried out to circuit, after maintenance completes, needing first to untie ground connection, then closing a floodgate.But due to the carelessness of maintenance person or other reasons, may occur that temporary ground wire leaks the situation of tearing open, power transmission of now closing a floodgate, gently then cause power off time to lengthen, the heavy then equipment of threat even personal safety.Some method existing adopts certain means of communication, as power carrier communication, note, GPRS, grounding switch status information of adjacent (opposite end) being stood reaches our station, if distance station grounding switch closes a floodgate, then automatic blocking our station closing operation, thus avoid our station combined floodgate maloperation with ground.This kind of anti-misoperation apparatus has certain effect, but there is the problem of two aspects: one is only can identify grounding switch, and helpless to the ground wire of interim overlap joint; Two is that this kind of device relies on the correct detection of disconnecting link device state and the unimpeded of communications conduit, and system architecture is comparatively complicated, and reliability is difficult to ensure.Also have researcher to propose a kind of ferroresonance voltage stabilized transformer in addition and detect ground connection to prevent the method for switching on earth wire.This equipment becomes a distant place in resonance voltage stabilizing to apply voltage, and detect transformer secondary voltage size, have ground connection to exist if think, in transformer pair side close to short circuit, voltage is very little, thus " pilot lamp " extinguishes, No switching on.This apparatus structure is simple, has stronger practicality, but due to different electric pressure, the line parameter circuit value difference of obstructed length is large, only relies on " pilot lamp " whether to extinguish to indicate whether there is ground connection difficulty larger.
Utility model content
In order to overcome, above-mentioned existing method wastes time and energy the utility model the utility model, the shortcoming of poor operability just, and provide a kind of distribution line strick precaution maloperation pick-up unit, this pick-up unit can judge whether line-to-ground line disconnects effectively easily, and provide a kind of location to save a large amount of manpower and materials, improve safe operation of power system level.
The utility model solves the technical scheme that its technical matters adopts: a kind of distribution line takes precautions against maloperation pick-up unit, it is characterized in that: comprise down conductor, controller, signal generator, filtering circuit, A/D converter, display, power supply pickup coil and measure inductive coil, signal generator is connected with controller with power supply pickup coil respectively, measurement inductive coil, filtering circuit, A/D converter are connected successively with controller, display is connected with controller, and power supply pickup coil and measurement inductive coil are enclosed within down conductor respectively.
Further, described display comprises the LED light that display screen and two can show different colours, LED light one of them be green light, another is red light.
Will terminate in maintenance, not yet during combined floodgate power transmission, utilize electromagnetic induction principle, non-cpntact measurement is carried out to the distribution line of maintenance, first give one, tested loop excitation pulse signal by signal generator, a pulse electromotive force E is responded in tested loop, will at tested loop generation current I under the effect of electromotive force E, controller is measured E and I and is processed, and shows tested impedance loop.Because distribution line is general shorter, under the signal of hundreds of hertz, lumped parameter still can be adopted to calculate, without temporary ground wire, when namely opening a way, its impedance loop is mainly made up of the ground capacitance of circuit, and its value is very large; And the promising temporary ground wire untied, and during short circuit, the reactance of circuit is the function with line length linear change, then by the measured value of impedance loop, the position of reflection temporary ground wire.Connect the controller collection measurement result measured and export, compare with the criterion formulated, whether line-to-ground line is disconnected and judges, and it is bright to control the corresponding pilot lamp of Different Results, shows simultaneously.
The utility model compared with prior art, has the following advantages:
(1) before closing a floodgate after line maintenance, line-to-ground situation is detected, avoid circuit switching on earth wire, cause closing a floodgate unsuccessfully.
(2) can directly judge whether circuit has earth point according to testing result.
(3) roughly can judge the position of the temporarily line of not removing according to impedance loop, be conducive to finding easily and fast and removing temporary ground wire, complete the work of maintenance power transmission faster to facilitate.
Accompanying drawing explanation
Fig. 1 is the structural representation of this pick-up unit.
Shown in figure: 1, down conductor 2, controller 3, signal generator 4, filtering circuit 5, A/D converter 6, display 61, display screen 62, LED light 621, green light 622, red light 7, power supply pickup coil 8, measurement inductive coil.
Embodiment
Below by drawings and Examples, the utility model is further elaborated.
As shown in Figure 1: a kind of distribution line takes precautions against maloperation pick-up unit, comprise down conductor 1, controller 2, signal generator 3, filtering circuit 4, A/D converter 5, display 6, power supply pickup coil 7 and measure inductive coil 8.Signal generator 3 is connected with controller 2 with power supply pickup coil 7 respectively.Measurement inductive coil 8, filtering circuit 4, A/D converter 5 are connected successively with controller 2, and display 6 is connected with controller 2, and power supply pickup coil 7 and measurement inductive coil 8 are enclosed within down conductor 1 respectively.
Above-described controller 2 is FPC3000-P080E-D2550-T type industrial panel computer.
In the present embodiment, described display 6 comprises the LED light 62 that display screen 61 and two can show different colours, LED light 62 one of them be green light 621, another is red light 622.
In the present embodiment, also comprise selftest module in described pick-up unit, whether selftest module is used for self-inspection wiring normal.
Above-mentioned distribution line takes precautions against the detection method of maloperation pick-up unit, comprises the following steps:
One. pick-up unit wiring: complete at line maintenance, after temporary ground wire is removed, is enclosed within down conductor 1 or grounding switch by the power supply pickup coil 7 in this pick-up unit and measurement inductive coil 8 respectively;
Two. startup self-detection: pick-up unit is energized, whether self-inspection wiring is normal, if so, then enters next step testing; If not, then check wiring, after having checked, repeat startup self-detection again, till self-inspection wiring is normal;
Three. detect and start: signal generator 3 first applies an excitation pulse signal by power supply pickup coil 7 to tested loop, a pulse electromotive force E is responded in tested loop, will at tested loop generation current I under the effect of electromotive force E, electric current I and electromotive force E is measured again by measuring inductive coil 8, and by filtering circuit 4 and A/D converter 5 by the Signal transmissions that measures in controller 2, the signal that controller 2 processes Injection Signal and measures, loop resistance values and transmission power direction can be obtained, simultaneously, controller 2 accepts input function, in conjunction with the pole tower ground resistance of concrete circuit and the loop resistance values of distribution line basic parameter and measurement, the position of the temporary ground wire leak torn open can be obtained.
Four. judge: judged whether " loop resistance values outrange " by controller 2, if, then controller 2 drives green light 621 bright, and " ground wire disconnects " is shown in display screen 61, in explanation circuit like this, all temporary ground wires are removed all, and now maintainer can close a floodgate power transmission after removing the grounding switch of this side or down conductor 1; If not, then controller 2 drives red light 622 bright, and in display screen 61, show the position of " far-end ground wire is not removed ", " loop resistance values " and temporary ground wire, temporary ground wire is had not remove in explanation circuit like this, now maintainer is according to the position of the temporary ground wire of display, rapid investigation, unties the ground wire Lou torn open, and then repeats step 2.
The utility model distribution line take precautions against maloperation pick-up unit and detection method thereof by electromagnetic coupled apply in measuring circuit one ac-excited, and by the electric current in electromagnetic induction measuring circuit, through controller 2 analyzing and processing the impedance loop that exports of auto levelizer; Controller 2 judges according to loop resistance values and whether there is the temporary ground wire leaking and tear open in circuit; The position of leaking the temporary ground wire torn open can be shown further in conjunction with the pole tower ground resistance of input and essential parameter of circuit and loop resistance values, the temporary ground wire Lou torn open is removed rapidly to facilitate maintainer, ensure the success ratio of combined floodgate power transmission, improve the safety operation level of electrical network.
Claims (2)
1. a distribution line takes precautions against maloperation pick-up unit, it is characterized in that: comprise down conductor, controller, signal generator, filtering circuit, A/D converter, display, power supply pickup coil and measure inductive coil, signal generator is connected with controller with power supply pickup coil respectively, measurement inductive coil, filtering circuit, A/D converter are connected successively with controller, display is connected with controller, and power supply pickup coil and measurement inductive coil are enclosed within down conductor respectively.
2. a kind of distribution line according to claim 1 takes precautions against maloperation pick-up unit, it is characterized in that: described display comprises the LED light that display screen and two can show different colours, LED light one of them be green light, another is red light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792667.5U CN204256096U (en) | 2014-12-16 | 2014-12-16 | A kind of distribution line takes precautions against maloperation pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792667.5U CN204256096U (en) | 2014-12-16 | 2014-12-16 | A kind of distribution line takes precautions against maloperation pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256096U true CN204256096U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420792667.5U Expired - Fee Related CN204256096U (en) | 2014-12-16 | 2014-12-16 | A kind of distribution line takes precautions against maloperation pick-up unit |
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| Country | Link |
|---|---|
| CN (1) | CN204256096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490635A (en) * | 2018-12-25 | 2019-03-19 | 国网江苏省电力有限公司南京供电分公司 | Pole tower ground resistance on-line monitoring system and on-line monitoring method |
-
2014
- 2014-12-16 CN CN201420792667.5U patent/CN204256096U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490635A (en) * | 2018-12-25 | 2019-03-19 | 国网江苏省电力有限公司南京供电分公司 | Pole tower ground resistance on-line monitoring system and on-line monitoring method |
| CN109490635B (en) * | 2018-12-25 | 2021-11-26 | 国网江苏省电力有限公司南京供电分公司 | Online monitoring system and online monitoring method for tower grounding resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20191216 |