CN202975225U - Misoperation preventive device for power transmission lines - Google Patents
Misoperation preventive device for power transmission lines Download PDFInfo
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- CN202975225U CN202975225U CN 201220687905 CN201220687905U CN202975225U CN 202975225 U CN202975225 U CN 202975225U CN 201220687905 CN201220687905 CN 201220687905 CN 201220687905 U CN201220687905 U CN 201220687905U CN 202975225 U CN202975225 U CN 202975225U
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Abstract
The utility model discloses a misoperation preventive device for power transmission lines. The misoperation preventive device comprises a signal generator, a power coil, a measuring coil, a filter circuit, an A/D (analog/digital) converter, a judging module and indicator lamps. The connection structure of the misoperation preventive device includes that the power coil is sequentially connected with the signal generator, the judging module and the indicator lamps, the measuring coil is sequentially connected with the filter circuit, the A/D converter, the judging module and the indicator lamps, and the power coil and the measuring coil are sleeved on a down conductor. The misoperation preventive device has the advantages that grounding conditions of the lines can be detected before the maintained lines are switched on, and switch-on failure due to the fact that the lines with ground wires are switched on is prevented; and whether the lines have ground points or not can be directly judged according to detection results.
Description
Technical field
The utility model belongs to transmission line of electricity and takes precautions against the misoperation apparatus technical field of structures, relates to the pick-up unit that a kind of transmission line of electricity is taken precautions against maloperation, is the device that after completing for detection of power transmission lines overhauling, whether ground wire is removed.
Background technology
When the electric line interruption maintenance, for guaranteeing the person and device security, can carry out grounding to circuit, after maintenance is completed, need to first untie ground connection, then close a floodgate.Yet due to a variety of causes, the situation that ground connection is just closed a floodgate may appear not untiing, the failure of must closing a floodgate like this, and gently cause power off time to lengthen, and heavy threaten even personal safety of equipment.Some places adopt certain means of communication now, as power carrier communication, note, GPRS, adjacent (opposite end) the grounding switch status information of standing is reached our station, if the distance station grounding switch closes a floodgate, automatic blocking our station closing operation, thus our station band contact of earth maloperation avoided.This class anti-misoperation apparatus has certain effect, but has the problem of two aspects: the one, only can identify grounding switch, and helpless to the ground wire of interim overlap joint; The 2nd, this class device relies on the unimpeded of the correct detection of disconnecting link device state and communications conduit, and system architecture is comparatively complicated, and reliability is difficult to guarantee.Also have in addition the researcher to propose a kind of ferroresonance voltage stabilized transformer and detect the method that ground connection prevents switching on earth wire.This equipment is to become a distant place in the resonance voltage stabilizing to apply voltage, detects transformer pair side voltage swing, if think that the ground connection existence is arranged, near short circuit, voltage is very little in transformer pair side, thereby " pilot lamp " extinguishes, No switching on.This apparatus structure is simple, and stronger practicality is arranged, but due to different electric pressures, the line parameter circuit value difference of obstructed length is large, only relies on " pilot lamp " whether to extinguish and indicates whether to have the ground connection difficulty larger.
The utility model content
In order to overcome waste time and energy, the shortcoming of poor operability just by above-mentioned existing device for the utility model, and the device that provides a kind of new rear ground wire of detection line maintenance whether to disconnect, this device can judge effectively easily whether the line-to-ground line disconnects, save a large amount of manpower and materials, improve the safe operation of power system level.
Technical solution of the present utility model is:
A kind of transmission line of electricity is taken precautions against misoperation apparatus, and the utility model feature is to comprise signal generator, power coil, measuring coil, filtering circuit, A/D converter, judge module and pilot lamp; Its syndeton is: power coil sequentially is connected with signal generator, judge module, pilot lamp; Measuring coil and filtering circuit, A/D converter, judge module, pilot lamp sequentially connect; Power coil and measuring coil are enclosed within on down conductor simultaneously.
The utility model device principle of work is to produce alien frequencies (non-power frequency) sine wave signal with oscillatory circuit, carries out injecting after power amplification comprising iron core, being enclosed within the power coil on down conductor, by electromagnetic induction generation current in the down conductor loop; Measure with a measuring coil electric current that flows through on downlead again, in conjunction with the pumping signal in power coil, the computing electric power line impedance loop; Control module judges according to result of calculation whether circuit has earth point, and judged result is shown.
System controls and to be comprised of filtering circuit, A/D converter, judge module and pilot lamp, and control module receives and judges the data that measuring coil sends, and line status is judged and shows judged result.
The beneficial effects of the utility model are:
(1) the line-to-ground situation is detected before closing a floodgate after line maintenance, avoid the circuit switching on earth wire, cause closing a floodgate unsuccessfully.
(2) can judge directly whether circuit has earth point according to testing result.
Below in conjunction with the drawings and specific embodiments, the present invention is done further explanation.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the utility model testing process schematic diagram.
Embodiment
See Fig. 1, Fig. 2, a kind of transmission line of electricity is taken precautions against misoperation apparatus, and the utility model feature is to comprise signal generator, power coil, measuring coil, filtering circuit, A/D converter, judge module and pilot lamp; Its syndeton is: power coil sequentially is connected with signal generator, judge module, pilot lamp; Measuring coil and filtering circuit, A/D converter, judge module, pilot lamp sequentially connect; Power coil and measuring coil are enclosed within on down conductor simultaneously.
The utility model principle of work is to produce alien frequencies (non-power frequency) sine wave signal with oscillatory circuit, carries out injecting after power amplification comprising iron core, being enclosed within the power coil on down conductor, by electromagnetic induction generation current in the down conductor loop; Measure with a measuring coil electric current that flows through on downlead again, in conjunction with the pumping signal in power coil, the computing electric power line impedance loop; Control module judges according to result of calculation whether circuit has earth point, and judged result is shown.
System control module is comprised of filtering circuit, A/D converter, judge module and pilot lamp, and control module receives and judges the data that measuring coil sends, and line status is judged and shows judged result.）
The utility model operation steps:
1, complete at line maintenance, after all artificial ground wires are removed, the inductive coil in equipment is enclosed within on grounding switch, opposite end transformer station opens the opposite end grounding switch.
2. the signal generator of pick-up unit produces the alien frequencies AC signal, through using signal source as measuring after power amplification; The measurement of the injection in measuring-signal source and loop electric current is completed by two coils that comprise iron core respectively; The impedance loop that analytical calculation can obtain circuit is carried out in Injection Signal and the electric current combination that measures.
3, by filtering circuit, A/D converter, the control system that judge module, pilot lamp form judges according to result of calculation whether circuit has earth point, if testing result greater than 800 ohms circuits without earth point, otherwise show that circuit has ground connection.Control module is shown judged result by the control display traffic lights.
Claims (1)
1. a transmission line of electricity is taken precautions against misoperation apparatus, it is characterized in that, comprises signal generator, power coil, measuring coil, filtering circuit, A/D converter, judge module and pilot lamp; Its syndeton is: power coil sequentially is connected with signal generator, judge module, pilot lamp; Measuring coil and filtering circuit, A/D converter, judge module, pilot lamp sequentially connect; Power coil and measuring coil are enclosed within on down conductor simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687905 CN202975225U (en) | 2012-12-13 | 2012-12-13 | Misoperation preventive device for power transmission lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220687905 CN202975225U (en) | 2012-12-13 | 2012-12-13 | Misoperation preventive device for power transmission lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202975225U true CN202975225U (en) | 2013-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220687905 Expired - Lifetime CN202975225U (en) | 2012-12-13 | 2012-12-13 | Misoperation preventive device for power transmission lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202975225U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201486A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | Portable short-circuit grounding device |
| CN104201485A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | Short circuit grounding wire device with locking function |
| CN104241968A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Anti-misoperation short-circuit grounding device |
| CN104241969A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Simple short circuit grounding device |
| CN104391209A (en) * | 2014-12-10 | 2015-03-04 | 国家电网公司 | Device for measuring line status |
| CN104459441A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Method for preventing misoperation in process of line maintenance |
| CN104459445A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Distributing line misoperation preventing detecting device and detecting method thereof |
| CN104459405A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Method for measuring line state |
-
2012
- 2012-12-13 CN CN 201220687905 patent/CN202975225U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201486A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | Portable short-circuit grounding device |
| CN104201485A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | Short circuit grounding wire device with locking function |
| CN104241968A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Anti-misoperation short-circuit grounding device |
| CN104241969A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Simple short circuit grounding device |
| CN107104328A (en) * | 2014-09-19 | 2017-08-29 | 国家电网公司 | A kind of band aids in the anti-misoperation short-circuit grounding device of chuck |
| CN107104328B (en) * | 2014-09-19 | 2019-06-18 | 国家电网公司 | A kind of anti-misoperation short-circuit grounding device of band auxiliary collet |
| CN104391209A (en) * | 2014-12-10 | 2015-03-04 | 国家电网公司 | Device for measuring line status |
| CN104459441A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Method for preventing misoperation in process of line maintenance |
| CN104459405A (en) * | 2014-12-10 | 2015-03-25 | 国家电网公司 | Method for measuring line state |
| CN104459445A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Distributing line misoperation preventing detecting device and detecting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 677000 Yunnan province Lincang Linxiang District South Road No. 991 Patentee after: LINCANG POWER SUPPLY BUREAU YUNNAN POWER GRID Co.,Ltd. Address before: 677000 Yunnan province Lincang Linxiang District South Road No. 991 Patentee before: YUNNAN POWER GRID CORPORATION, LINCANG POWER SUPPLY BUREAU |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |