CN201112121Y - 1000kV optical fiber mutual inductor - Google Patents
1000kV optical fiber mutual inductor Download PDFInfo
- Publication number
- CN201112121Y CN201112121Y CNU2007201266101U CN200720126610U CN201112121Y CN 201112121 Y CN201112121 Y CN 201112121Y CN U2007201266101 U CNU2007201266101 U CN U2007201266101U CN 200720126610 U CN200720126610 U CN 200720126610U CN 201112121 Y CN201112121 Y CN 201112121Y
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- current
- signal transmission
- voltage
- sensor
- transmission fiber
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Abstract
The utility model relates to a 1000KV fiber mutual inductor which is characterized in that a micro current sensor, a self-powered sensor of a voltage mutual conductor, a self-powered sensor and a magnetostrictive sensor of a current mutual inductor and a precision resistance voltage divider which are connected with a current conducting rod are respectively and electrically connected with a photoelectric signal converter plate; a signal transmission fiber and the precision resistance voltage divider are arranged in a compound insulating bushing or a hollow cavity of a bushing insulator, and the signal transmission fiber and the photoelectric signal converter plate are optically connected. Weak electrical signals collected by the sensors are converted to digital signals and optical signals by the photoelectric signal converter plate, and the signal transmission fiber transmits the optical signals from the 1000KV extra-high voltage electric potential to the earth potential, therefore, the technical problem of extra-high voltage insulating treatment is effectively solved. The 1000KV fiber mutual inductor is widely applied to the measurement and protection of the voltage and current of an AC electricity gird and a DC electricity gird of the voltage class of 1000KV or below.
Description
Technical field
The utility model relates to a kind of electric power mutual-inductor, particularly a kind of 1000kV optical fiber instrument transformer.
Background technology
At present, the electric power mutual-inductor of power department use is respectively voltage transformer, current transformer, function singleness; Because traditional capacitance type potential transformer and electromagnetic current transducer are difficult to solve the insulation technology problem under the ultra high voltage, also are not used in the instrument transformer product in the 1000KV extra-high voltage grid in the prior art.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned weak point, and a kind of 1000kV optical fiber instrument transformer that is suitable for voltage, current measurement and the protection of digital transformer substation in the extra-high voltage grid is provided.
The purpose of this utility model is achieved in that 1000kV optical fiber instrument transformer comprises main body cover, base, compound insulating sleeve or bushing insulator, it is characterized in that passing main body cover both sides and fixedly connected with it current conduction bar two ends respectively with power bus-bar input wires terminal, output wiring terminal connects, be connected to the low current sensor at current conduction bar middle part, voltage transformer self-supply power source transducer, current transformer self-supply power source transducer and the magneto strictive sensor that places in the main body cover, precision resistance voltage divider is electrically connected with the photosignal change-over panel respectively, the main body cover lower end connects compound insulating sleeve or bushing insulator, signal transmission fiber and precision resistance voltage divider are installed in compound insulating sleeve or the bushing insulator cavity, signal transmission fiber is connected with photosignal change-over panel light, compound insulating sleeve or bushing insulator lower end are connected with base, and the signal transmission fiber lower end is the sensor signal output.
The utility model is owing to adopt above design, precision resistance voltage divider, low current sensor, magneto strictive sensor obtain voltage, the current signal of 1000KV ultra high voltage respectively by power bus-bar binding post and current conduction bar, the weak electric signal that the photosignal change-over panel obtains each transducer is converted to digital signal and light signal, solves the anti-interference problem of measuring-signal effectively.Voltage, channel current signal that voltage transformer self-supply power source transducer summation current transformer self-supply power source transducer is respectively on the photosignal change-over panel provide DC power supply, guarantee that the A/D conversion of each passage and the function of opto-electronic conversion realize.Signal transmission fiber is transferred to earth potential with light signal from 1000KV ultra high voltage current potential, has solved the technical problem of ultra high voltage insulation processing effectively.Compound insulating sleeve or bushing insulator cavity, main body cover and base intracavity form an airtight space, can fill dry air, nitrogen, sulphur hexafluoride, oiling, transformer oil or other insulation filler in the space, or be vacuum, can strengthen the insulation property of each parts effectively, prolong service life.Be widely used in interchange, the voltage in the direct current network, current measurement and the protection of 1000KV and following various electric pressures.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.
As shown in Figure 1,1000kV optical fiber instrument transformer comprises main body cover 1, base 2, compound insulating sleeve 3, pass main body cover 1 both sides and by fixedly connected with it current conduction bar 5 two ends of interior fit sealing nut 4 respectively with power bus-bar input wires terminal 6, output wiring terminal 7 connects, the iron-core coil that the is connected to current conduction bar 5 middle parts current sensor 8 that declines, voltage transformer self-supply power source transducer 9, current transformer self-supply power source transducer 10 and the PSSM passive solid magneto strictive sensor 11 that places in the main body cover 1, precision resistance voltage divider 14 is electrically connected with photosignal change-over panel 12 respectively, main body cover 1 lower end connects compound insulating sleeve 3, signal transmission fiber 13 and precision resistance voltage divider 14 are installed in compound insulating sleeve 3 cavitys, signal transmission fiber 13 is connected with photosignal change-over panel 12 light, compound insulating sleeve 3 lower ends are connected with base 2, signal transmission fiber 13 lower ends are sensor signal output 15, current conduction bar 5 and main body cover 1, compound insulating sleeve 3 and main body cover 1, be with the O RunddichtringO between the junction of base 2 respectively.
According to the test result to model machine of the present utility model, its important technological parameters is as follows:
(1) voltage transformer
Rated frequency: 50Hz
Rated primary voltage: 1000/ √ 3kV
Rated voltage factor: 1.5
Allow duration: 30s
Specified secondary output: digital quantity
Class of accuracy: 0.2,3P
(2) current transformer
Rated frequency: 50Hz
Rated primary current: 2kA
Rated primary current coefficient: 1.2
Rated short time thermal current: 50kA/3s
Specified dynamic current: 125kA
Specified symmetrical short-circuit electric current multiple: 20
Specified secondary output: digital quantity
Class of accuracy: 0.2S, 5P
(3) transient state oscillograph
Frequency bandwidth: 1MHz
Rated primary current: 40kA
Specified secondary output: digital quantity
(4) optical fiber instrument transformer highest voltage for equipment: 1100/ √ 3kV
Insulation level: 1100/1300/1800/2400kV
Power-frequency withstand voltage a: 1300kV/1min
Once-through operation impulse withstand voltage: 1800kV
Lightning impulse withstand voltage a: 2400kV
Claims (1)
1. 1000kV optical fiber instrument transformer, comprise main body cover (1), base (2), compound insulating sleeve or bushing insulator (3), it is characterized in that passing main body cover (1) both sides and fixedly connected with it current conduction bar (5) two ends respectively with power bus-bar input wires terminal (6), output wiring terminal (7) connects, be connected to the low current sensor (8) at current conduction bar (5) middle part, voltage transformer self-supply power source transducer (9), current transformer self-supply power source transducer (10) and place magneto strictive sensor (11) in the main body cover (1), precision resistance voltage divider (14) is electrically connected with photosignal change-over panel (12) respectively, main body cover (1) lower end connects compound insulating sleeve or bushing insulator (3), signal transmission fiber (13) and precision resistance voltage divider (14) are installed in compound insulating sleeve or bushing insulator (3) cavity, signal transmission fiber (13) is connected with photosignal change-over panel (12) light, compound insulating sleeve or bushing insulator (3) lower end is connected with base (2), and signal transmission fiber (13) lower end is sensor signal output (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201266101U CN201112121Y (en) | 2007-08-04 | 2007-08-04 | 1000kV optical fiber mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201266101U CN201112121Y (en) | 2007-08-04 | 2007-08-04 | 1000kV optical fiber mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201112121Y true CN201112121Y (en) | 2008-09-10 |
Family
ID=39963865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201266101U Expired - Fee Related CN201112121Y (en) | 2007-08-04 | 2007-08-04 | 1000kV optical fiber mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201112121Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713793B (en) * | 2009-12-04 | 2012-02-01 | 中国西电电气股份有限公司 | Gas insulation-based DC high voltage measuring device |
| CN104111367A (en) * | 2014-07-02 | 2014-10-22 | 中国西电电气股份有限公司 | Ultra-high voltage direct current voltage transformer |
| CN107449982A (en) * | 2017-07-28 | 2017-12-08 | 中国西电电气股份有限公司 | A kind of power frequency testing transformer high pressure winding head end electric current monitoring device and method |
-
2007
- 2007-08-04 CN CNU2007201266101U patent/CN201112121Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713793B (en) * | 2009-12-04 | 2012-02-01 | 中国西电电气股份有限公司 | Gas insulation-based DC high voltage measuring device |
| CN104111367A (en) * | 2014-07-02 | 2014-10-22 | 中国西电电气股份有限公司 | Ultra-high voltage direct current voltage transformer |
| CN107449982A (en) * | 2017-07-28 | 2017-12-08 | 中国西电电气股份有限公司 | A kind of power frequency testing transformer high pressure winding head end electric current monitoring device and method |
| CN107449982B (en) * | 2017-07-28 | 2020-02-07 | 中国西电电气股份有限公司 | Device and method for monitoring head end current of high-voltage winding of power frequency test transformer |
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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: 20080910 Termination date: 20140804 |
|
| EXPY | Termination of patent right or utility model |