CN202256590U - Insulation on-line monitoring device for transformer bushing - Google Patents
Insulation on-line monitoring device for transformer bushing Download PDFInfo
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- CN202256590U CN202256590U CN2011203866262U CN201120386626U CN202256590U CN 202256590 U CN202256590 U CN 202256590U CN 2011203866262 U CN2011203866262 U CN 2011203866262U CN 201120386626 U CN201120386626 U CN 201120386626U CN 202256590 U CN202256590 U CN 202256590U
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- line monitoring
- current measurement
- transformer
- bushing
- converting unit
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Abstract
The utility model discloses an insulation on-line monitoring device for a transformer bushing. The insulation on-line monitoring device comprises a bushing tap adapter, a tap grounding current measuring module, an on-line monitoring merging unit, an on-line monitoring intelligent electronic device (IED), a voltage transformer merging unit and a transmission optical fiber. A set of tap grounding current measuring module is additionally arranged at a transformer bushing tap outlet part, the bushing tap grounding current is subjected to in-site digital conversion, and the on-line monitoring merging unit is connected through the optical fiber. The insulation on-line monitoring device has the advantages that: (1) the optical fiber is adopted for transmitting digital signals, the problem of inaccurate remote transmission of measurement signals of a zero-flux micro current sensor is solved, and the measurement accuracy is improved; (2) the optical fiber power supply and the optical fiber signal transmission are adopted, the electric isolation between high-voltage equipment and low-voltage equipment is realized, the voltage transfer hidden danger cannot be caused, and the device can be used for the transformer bushing tap current measurement at any voltage stages; (3) the modularization and the standardization of a tap grounding current measuring device are realized; and (4) the appearance of a transformer body is more attractive.
Description
Technical field
The utility model relates to a kind of transformer online monitoring equipment, is specially the bushing shell for transformer insulation line monitoring device.
Background technology
The bushing shell for transformer insulated on-line monitoring is an important content of transformer main equipment on-line monitoring; Through real-time monitoring bushing shell for transformer end screen ground current i; And take sleeve pipe magnitude of voltage u (providing) by system busbar voltage; Calculate sleeve pipe insulation factor tg δ, but the dielectric level of effecting reaction sleeve pipe, and the prevention bushing shell for transformer reduces substantial equipment accidents such as puncture and blast take place because of dielectric level.Must can measure phase angle difference between the two synchronously when sampled voltage u and current i.To conventional substation, u and i are analog quantity, and be simple synchronously.To digital transformer substation, u is a digital quantity, and i is an analog quantity, i through IED (intelligent electronic device) convert to digital quantity in merge cells through the B sign indicating number to the time or network to the time realize synchronously.After the i value is measured by the Zero Magnetic Flux Little Electric Current Transducer of special use, and cause through cable and to monitor IED near being installed in transformer body or transformer body, again to merge cells.Since the signal of i value own a little less than, its measured value size draws through 2～10 meters cables that to connect the back decay bigger generally below 700mA, signal measurement is forbidden, and drawing of cable connects the hidden danger of bringing the voltage transfer simultaneously.
Summary of the invention
To the problems referred to above, the utility model provides the bushing shell for transformer insulation line monitoring device that a kind of measurement result is accurate, the electrical isolation performance is good, safe in utilization.
The utility model is that the technical scheme that its technical matters of solution is adopted is:
The bushing shell for transformer insulation line monitoring device; Comprise bottom shielding of bushing adapter, end screen ground current measurement module, on-line monitoring merge cells, on-line monitoring IED, voltage transformer (VT) merge cells and transmission cable; After drawing through the bottom shielding of bushing adapter, the bottom shielding of bushing ground current shields ground current measurement module ground connection through the end; Be provided with the current measurement signal converting unit in the screen ground current measurement module of end; Current measurement signal is transported to the on-line monitoring merge cells through transmission cable after the current measurement signal converting unit is changed, the input end of voltage transformer (VT) merge cells is connected with electronic type busbar voltage sensor, and output terminal links to each other with the on-line monitoring merge cells; The output of on-line monitoring merge cells is sent into on-line monitoring IED and is carried out data processing, and the output terminal of on-line monitoring IED links to each other with upper system.
As preferred embodiment, said upper system is on-the-spot main IED and/or station level advanced analysis system.
As preferred embodiment, said current measurement signal converting unit comprises A/D converting unit and photosignal converting unit, and current measurement signal is successively through delivering on the transmission cable after A/D converting unit and the photosignal converting unit.
The beneficial effect of the utility model is: the utility model is through installing a cover end screen ground current measurement module additional in screen exit, bushing shell for transformer end; The bottom shielding of bushing ground current is carried out the in-situ digitalization conversion; Insert the on-line monitoring merge cells through optical fiber; (1) adopts the Optical Fiber Transmission digital signal, solved the inaccurate problem of Zero Magnetic Flux Little Electric Current Transducer measuring-signal teletransmission, improved the measurement accuracy; (2) through optical fiber power supply and optical fiber transmission signal, realized the electrical isolation of high-low pressure equipment room, can not bring voltage to shift hidden danger, this device is applicable to the bushing shell for transformer end screen current measurement of any electric pressure; (3) modularization and the standardization of last screen ground current measurement mechanism have been realized; (4) transformer body outward appearance is more attractive in appearance.
Description of drawings
Further explain below in conjunction with accompanying drawing and embodiment:
Fig. 1 is the structure composition diagram of a kind of embodiment of the utility model.
Embodiment
With reference to Fig. 1, the bushing shell for transformer insulation line monitoring device of the utility model comprises bottom shielding of bushing adapter 1, end screen ground current measurement module 2, on-line monitoring merge cells 3, on-line monitoring IED 4, voltage transformer (VT) merge cells 5 and transmission cable 6.After drawing through bottom shielding of bushing adapter 1, the bottom shielding of bushing ground current shields ground current measurement module 2 ground connection through the end; Be provided with the current measurement signal converting unit in the end screen ground current measurement module 2; The current measurement signal converting unit comprises A/D converting unit and photosignal converting unit, and current measurement signal is successively through delivering on the transmission cable 6 after A/D converting unit and the photosignal converting unit.Current measurement signal is transported to on-line monitoring merge cells 3 through transmission cable 6 after the current measurement signal converting unit is changed; The input end of voltage transformer (VT) merge cells 5 is connected with electronic type busbar voltage sensor; Output terminal links to each other with on-line monitoring merge cells 3; The output of on-line monitoring merge cells 3 is sent into on-line monitoring IED 4 and is carried out data processing; The output terminal of on-line monitoring IED 4 links to each other with upper system, and it is on-the-spot main IED and/or station level advanced analysis system that this upper system is generally upper system.
End screen ground current measurement module 2 is except the current measurement signal converting unit; Generally also comprise Zero Magnetic Flux Little Electric Current Transducer; Precision resister partial pressure unit etc., it is through being connected in series high precision copper manganese resistance, the voltage signal at measuring resistance two ends at current return; Carry out the A/D conversion by processor on the spot, again after opto-electronic conversion with light signal or digital signal form output.The synchronizing process of sampled voltage signal u and current signal i realizes through on-line monitoring merge cells 3 that generally a kind of method of synchronization is directly in merge cells, to accomplish synchronously; Another kind of for merge cells send out pulse signal by force to the time sampling.
The data processing of on-line monitoring IED 4 can calculate corresponding dielectric loss angle, loss factor and capacitance, and result is delivered to on-the-spot main IED or station level advanced analysis system with storing on the data.
The embodiment of the utility model is not restricted to the described embodiments, as long as it reaches the technique effect of the utility model with essentially identical means, all should belong to the protection domain of the utility model.
Claims (3)
1. bushing shell for transformer insulation line monitoring device; It is characterized in that comprising bottom shielding of bushing adapter (1), end screen ground current measurement module (2), on-line monitoring merge cells (3), on-line monitoring IED (4), voltage transformer (VT) merge cells (5) and transmission cable (6); After drawing through bottom shielding of bushing adapter (1), the bottom shielding of bushing ground current shields ground current measurement module (2) ground connection through the end; Be provided with the current measurement signal converting unit in the end screen ground current measurement module (2); Current measurement signal is transported to on-line monitoring merge cells (3) through transmission cable (6) after the current measurement signal converting unit is changed; The input end of voltage transformer (VT) merge cells (5) is connected with electronic type busbar voltage sensor; Output terminal links to each other with on-line monitoring merge cells (3), and the output of on-line monitoring merge cells (3) is sent into on-line monitoring IED (4) and carried out data processing, and the output terminal of on-line monitoring IED (4) links to each other with upper system.
2. bushing shell for transformer insulation line monitoring device according to claim 1 is characterized in that said upper system is on-the-spot main IED and/or station level advanced analysis system.
3. bushing shell for transformer insulation line monitoring device according to claim 1; It is characterized in that said current measurement signal converting unit comprises A/D converting unit and photosignal converting unit, current measurement signal is successively through delivering on the transmission cable (6) after A/D converting unit and the photosignal converting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203866262U CN202256590U (en) | 2011-10-12 | 2011-10-12 | Insulation on-line monitoring device for transformer bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203866262U CN202256590U (en) | 2011-10-12 | 2011-10-12 | Insulation on-line monitoring device for transformer bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256590U true CN202256590U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203866262U Expired - Fee Related CN202256590U (en) | 2011-10-12 | 2011-10-12 | Insulation on-line monitoring device for transformer bushing |
Country Status (1)
| Country | Link |
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| CN (1) | CN202256590U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841245A (en) * | 2012-09-24 | 2012-12-26 | 广西电网公司电力科学研究院 | Device for detecting end screen current parameter of high-voltage transformer bushing in real time, and control method for device |
| CN103206984A (en) * | 2013-03-26 | 2013-07-17 | 国家电网公司 | Intelligent component for oil-immersed transformer |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN108333439A (en) * | 2018-03-21 | 2018-07-27 | 广东电网有限责任公司电力科学研究院 | A kind of bushing shell for transformer dielectric loss and capacitance monitor system |
| CN114594351A (en) * | 2022-03-18 | 2022-06-07 | 国网浙江省电力有限公司电力科学研究院 | Transformer bushing partial discharge monitoring chip device and method |
-
2011
- 2011-10-12 CN CN2011203866262U patent/CN202256590U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841245A (en) * | 2012-09-24 | 2012-12-26 | 广西电网公司电力科学研究院 | Device for detecting end screen current parameter of high-voltage transformer bushing in real time, and control method for device |
| CN103206984A (en) * | 2013-03-26 | 2013-07-17 | 国家电网公司 | Intelligent component for oil-immersed transformer |
| CN106645822A (en) * | 2017-01-16 | 2017-05-10 | 江苏骏龙光电科技股份有限公司 | Voltage transformer insulation sleeve tube monitoring device and installation method therefor |
| CN108333439A (en) * | 2018-03-21 | 2018-07-27 | 广东电网有限责任公司电力科学研究院 | A kind of bushing shell for transformer dielectric loss and capacitance monitor system |
| CN114594351A (en) * | 2022-03-18 | 2022-06-07 | 国网浙江省电力有限公司电力科学研究院 | Transformer bushing partial discharge monitoring chip device and method |
| WO2023174448A1 (en) * | 2022-03-18 | 2023-09-21 | 国网浙江省电力有限公司电力科学研究院 | Transformer bushing partial discharge monitoring chip device and method |
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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 |
Granted publication date: 20120530 Termination date: 20171012 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |