CN205353258U - Transformer core ground connection on -line monitoring system - Google Patents
Transformer core ground connection on -line monitoring system Download PDFInfo
- Publication number
- CN205353258U CN205353258U CN201620071279.7U CN201620071279U CN205353258U CN 205353258 U CN205353258 U CN 205353258U CN 201620071279 U CN201620071279 U CN 201620071279U CN 205353258 U CN205353258 U CN 205353258U
- Authority
- CN
- China
- Prior art keywords
- sensing unit
- transformer
- monitoring system
- current sensing
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Locating Faults (AREA)
Abstract
The utility model discloses a transformer core ground connection on -line monitoring system, including electric current sensing unit, monitor cell and fusing unit, the electric current sensing unit is punching formula current transformer, the electric current sensing unit is connected with the transformer to be connected with monitor cell through secret connecting wire, the setting of fusing unit is in on the transformer earth connection, and with the current input of electric current sensing unit connects. The utility model provides a transformer core ground connection on -line monitoring system can accurately monitor transformer core ground connection situation, multiple guarantee transformer safety work.
Description
Technical field
This utility model relates to transformer monitoring apparatus field, particularly relates to a kind of transformer core grounding on-line monitoring system.
Background technology
The iron core of the big-and-middle-sized transformator that current China manufactures both passes through a sleeve pipe and causes oil box external ground.This is because power transformer is when properly functioning, there is electric field around winding, and the hardware such as iron core and folder is in this electric field, and field intensity is different, if the unreliable ground connection of iron core, charge and discharge phenomena will be produced, damage its solid and oil-insulation.Therefore, iron core must have some reliable grounds, if iron core another one point earth occurs in certain position for a certain reason, forms closed-loop path, then arises that circulation on the lead-in wire of normal ground, here it is multipoint earthing of iron core fault.After the multipoint earthing of iron core of transformator, iron core partial short-circuit can be caused overheated on the one hand, time serious, even can cause iron core partial burnt-out, lead to the significant trouble needing to change iron core silicon-steel sheet；On the other hand, owing to the normal ground line of iron core produces circulation, cause transformator hot-spot, it is likely to generation discharging fault, it is thus desirable to real time on-line monitoring transformer iron core grounding current, finding the insulation defect of electrical transformer cores, folder in time, in order to take corresponding treatment measures, implementing repair based on condition of component for transformator provides foundation.
Utility model content
Because the drawbacks described above of prior art, technical problem to be solved in the utility model is to provide a kind of transformer core grounding on-line monitoring system, energy accurate measurements transformer core grounding situation, ensures transformer safety work.
For achieving the above object, this utility model provides a kind of transformer core grounding on-line monitoring system, including current sensing unit, monitoring means and fusing unit；Described current sensing unit is straight-through current transformer, and described current sensing unit is connected with transformator, and is connected with monitoring means by underground connecting line；Described fusing unit is arranged on described transformer grounding line, and is connected with the current input terminal of described current sensing unit.
Further, also including temperature detected by optical fiber sensing unit, described temperature detected by optical fiber sensing unit is connected with described transformator, and is connected with described monitoring means by underground connecting line.
Preferably, the power current measurement of described straight-through current transformer ranges for 5mA～10A.
This utility model has the advantages that
During utility model works, current sensing unit is enclosed within the iron core of main body transformator, distortionless collection iron core Leakage Current signal over the ground, then pass through buried cable and current signal is sent to monitoring means, the analogue signal collected is converted to digital signal by monitoring means, can accurate analysis, judge, dope the health status of core insulation.
The temperature signal that temperature detected by optical fiber sensing unit induces reaches monitoring means through optical fiber, and monitoring means can pass through wired or wireless interface outwards to be transmitted and reports to the police.Owing to being the temperature directly measuring iron core, not only degree of accuracy is high, and can detect within the very first time iron core overheated and and alarm, it is to avoid because of delayed occurred safety problem of reporting to the police, also can confirm that the particular location of point occurs fault, it is simple to maintenance simultaneously.And by the setting of the unit that fuses, when transformer core electric current over the ground exceedes certain value, if owing to failing maintenance in time, also automatically fusing, cut off original earth lead, the safety of double shield transformator.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to be fully understood from the purpose of this utility model, feature and effect.
Accompanying drawing explanation
Fig. 1 is the system connection diagram of a preferred embodiment of the present utility model；
In figure, 1 is current sensing unit, and 2 is fusing unit, and 3 is monitoring means, and 4 is transformator, and 5 is iron core, and 6 is underground connecting line, and 7 is temperature detected by optical fiber sensing unit.
Detailed description of the invention
As it is shown in figure 1, a kind of transformer core grounding on-line monitoring system, including current sensing unit 1, monitoring means 3, fusing unit 2 and temperature detected by optical fiber sensing unit 7.Current sensing unit 1 is straight-through current transformer, and the power current measurement of straight-through current transformer ranges for 5mA～10A, and current sensing unit 1 is connected with transformator 4, and is connected with monitoring means 3 by underground connecting line 6；According to site specific, can be directly mounted on earth cable line, it is possible to be arranged on iron core grounding bronze medal and folder ground connection bronze medal.What sensor adopted is active electric current sensing unit, sensor and acquisition module are fixed in place, adopt the output of single channel ac voltage signal: owing to the electric current in iron core or folder earth lead is only tens milliamperes when single-point grounding, and when multipoint earthing up to tens of peaces, the excursion of electric current is big especially, adopt a road current sensing unit output, ensured the precision measured by the software algorithm of current sensing unit high-accuracy data acquisition and monitoring means 3.
Fusing unit 2 is arranged on the earth lead of transformator 4 (earth lead, for attractive in appearance, is generally located in transformator monolithic case, and iron core 5 is extended in shell and is grounded by earth lead), and is connected with the current input terminal of current sensing unit 1.
Temperature detected by optical fiber sensing unit 7 is connected with transformator 4, and is connected with monitoring means 3 by underground connecting line 6.Temperature detected by optical fiber sensing unit 7 is distributed in each phase of transformer core 5, can be embedded in iron core 5 surface when transformer manufacturing, simultaneously by arranging optical fiber joint end on transformator 4 shell, it is possible to connects optical fiber and can prevent transformer oil from spilling.Being connected with monitoring means 3 by optical fiber joint end by temperature detected by optical fiber sensing unit 7 with optical fiber, optical fiber cabling is incorporated in underground connecting line 6.
Preferred embodiment of the present utility model described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technical staff in the art pass through the available technical scheme of logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model, all should in the protection domain being defined in the patent claims.
Claims (3)
1. a transformer core grounding on-line monitoring system, it is characterised in that include current sensing unit (1), monitoring means (3) and fusing unit (2)；Described current sensing unit (1) is straight-through current transformer, and described current sensing unit (1) is connected with transformator (4), and is connected with described monitoring means (3) by underground connecting line (6)；Described fusing unit (2) is arranged on described transformator (4) earth lead, and is connected with the current input terminal of described current sensing unit (1).
2. transformer core grounding on-line monitoring system as claimed in claim 1, it is characterized in that, also include temperature detected by optical fiber sensing unit (7), described temperature detected by optical fiber sensing unit (7) is connected with described transformator (4), and is connected with described monitoring means (3) by underground connecting line (6).
3. transformer core grounding on-line monitoring system as claimed in claim 1, it is characterised in that the power current measurement of described straight-through current transformer ranges for 5mA～10A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620071279.7U CN205353258U (en) | 2016-01-25 | 2016-01-25 | Transformer core ground connection on -line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620071279.7U CN205353258U (en) | 2016-01-25 | 2016-01-25 | Transformer core ground connection on -line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205353258U true CN205353258U (en) | 2016-06-29 |
Family
ID=56180823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620071279.7U Active CN205353258U (en) | 2016-01-25 | 2016-01-25 | Transformer core ground connection on -line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205353258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
-
2016
- 2016-01-25 CN CN201620071279.7U patent/CN205353258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108318732B (en) * | 2018-03-13 | 2024-01-23 | 国家电网公司 | On-line monitoring device and method for grounding current of transformer core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103293443B (en) | A kind of distribution network overhead line Earth design method | |
| CN201229389Y (en) | Cable sheath insulation on-line monitoring device | |
| CN103323751B (en) | A kind of high pressure stub cable insulation terminal local discharge test device and using method | |
| CN203688725U (en) | On-line power cable insulating monitoring device | |
| CN106896300B (en) | The monitoring device of power cable connector temperature and PD parameter | |
| CN201965191U (en) | Capacitor intelligentizing device | |
| CN103344884B (en) | Power overhead network fault two-frequency signal detection and location method and special orientator thereof | |
| CN102590670A (en) | High voltage cable smart grounding box | |
| CN101975911B (en) | Earth fault judging method for overhead line fault indicator | |
| CN102495340A (en) | Online power cable partial discharge monitoring system based on electromagnetic waves and high-frequency current transformer (CT) | |
| CN202443038U (en) | High-voltage cable intelligence earth box | |
| CN103558511A (en) | Online earth fault positioning system for power distribution network | |
| CN204228878U (en) | A kind of cable sheath grounding circulation detection system | |
| CN105371742A (en) | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method | |
| CN204214974U (en) | High voltage power cable terminal on-Line Monitor Device | |
| CN203658430U (en) | Capacitive equipment insulation online monitoring and electrification test integrated sampling protection device | |
| CN103487725B (en) | A kind of overhead distribution earth fault indicating device based on zero-sequence component method | |
| CN108089086B (en) | A kind of power distribution network cable and junction malfunction diagnostic device and diagnostic method | |
| CN205353258U (en) | Transformer core ground connection on -line monitoring system | |
| CN105158657A (en) | High-voltage switch cabinet partial discharge online monitoring system | |
| CN105445633A (en) | High-voltage cable protective layer loop current multi-state monitoring device | |
| CN203164360U (en) | Transformer device insulation online monitoring system | |
| KR20100037375A (en) | Apparatus for measuring earth resistance | |
| CN204008979U (en) | The early warning of power cable insulation On-line Fault and positioning system | |
| CN105046018A (en) | Non-contact line over-voltage monitoring apparatus and monitoring method based on finite element analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |