CN202189142U - Complete set of error checking device for super/extra-high voltage CVT - Google Patents
Complete set of error checking device for super/extra-high voltage CVT Download PDFInfo
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- CN202189142U CN202189142U CN201120293675.1U CN201120293675U CN202189142U CN 202189142 U CN202189142 U CN 202189142U CN 201120293675 U CN201120293675 U CN 201120293675U CN 202189142 U CN202189142 U CN 202189142U
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- 239000004020 conductor Substances 0.000 claims abstract description 11
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 229910018503 SF6 Inorganic materials 0.000 claims description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 24
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a complete set of error checking device for super/extra-high voltage CVT (Capacitor Voltage Transformer). A voltage equalizing cover is mounted at the upper end of a primary wiring board, wherein the primary wiring board is connected to one end of an insulating sleeve; a three-way flange is connected to the other end of the insulating sleeve; a reference voltage transformer and a reactor upper-end flange are connected to the lower end of the three-way flange; the reference voltage transformer and the reactor upper-end flange are electrically connected via a high-voltage conductor; connecting plates are respectively connected with the reference voltage transformer and the reactor upper-end flange; a pair of main shafts are welded on the side face of box bodies of the reference voltage transformer and the reactor; a pair of main shafts are welded on the side face of the three-way flange; the voltage input end of a voltage regulator is connected with an AC power supply; the voltage output end of the voltage regulator is connected with the voltage input end of an exciting transformer; the voltage output end of the exciting transformer is connected with the low voltage end of the reactor; and an electrical control platform is used for displaying a voltage value measured by the reference voltage transformer and a current value of the reactor. The device provided by the utility model is applied to a super/extra-high voltage power station, and is used for performing an error checking test by applying power frequency voltage to the CVT.
Description
(1) technical field
The utility model is ultra, extra-high voltage capacitance type potential transformer error checking complete equipment; Relate to a kind of capacitance type potential transformer error detecting facility; Be mainly used in ultra, scene, extra-high voltage power station; Capacitance type potential transformer is applied power-frequency voltage and carries out error-detecting, belong to capacitance type potential transformer testing equipment field.
(2) background technology
When capacitance type potential transformer carried out error checking at the scene, test frequency must carry out under the condition of 50Hz (or 60Hz).Because the electric capacity of capacitance type potential transformer is bigger, is generally 0.005～0.02uF, therefore; Capacity requirement to experiment power supply is just very high; Be generally up to a hundred kilovolt-amperes even hundreds of kilovolt-ampere, the scene often is difficult to find so jumbo power supply, and is complicated because of on-the-spot traffic condition simultaneously; Tradition such as the power frequency testing transformer equipment that boosts is bigger because of volume, weight, is difficult to satisfy the requirement of onsite moving, test.
For reducing the experiment power supply capacity; Adopt the series resonance principle to apply voltage; In the test loop, seal in reactor; During as
;
then reaches resonant condition in
loop this moment; The method that reaches this state has two kinds; A kind of is to regulate inductance L, is called industrial frequency resonance; A kind of is regulating frequency f, is called frequency conversion resonance vibration, to the testing requirements of capacitance type potential transformer error testing, adopts industrial frequency resonance to do pressure build-up test according to national standard.
Traditional ultra, extra-high voltage capacitance type potential transformer error detecting facility; General two joints or the two above oil immersed types of joint or dry reactor of adopting carry out resonance step-up; Cooperate independent standard potential transformer equipment to carry out error-detecting again, the equipment set volume is bigger, and transportation is also inconvenient.Also need arrive high-altitude wiring to the scene, power station, increase the danger of testing crew work high above the ground.Oil immersed type or dry reactor non-uniform electric are prone in the use to puncture and burn.The reactor whole height is higher, is inconvenient to bridge, culvert etc., as adopting the split means of transportation, also needs every joint reactor is installed to together through instruments such as cranes to the scene, power station, has increased the working strength of testing crew, and test efficiency is lower.
(3) summary of the invention
For addressing the above problem; The utility model provides a kind of ultra, extra-high voltage capacitance type potential transformer error checking complete equipment; Adopt the series resonance principle; Make the test loop reach resonant condition through regulating the reactor inductance value, realize capacitance type potential transformer is applied the requirement of power-frequency voltage.Standard potential transformer and capacitance type potential transformer are connected in parallel at high-pressure side, and both draw measuring error through the secondary voltage comparison.Reactor connects together through the threeway flange with standard potential transformer, and the inner conductor that adopts is realized being electrically connected, and testing crew needn't arrive eminence and carry out wiring, has improved the security of testing crew.The shared insulating sleeve of reactor and standard potential transformer, compact conformation has dwindled the set of equipments volume.Reactor and standard potential transformer overall fixed on hydraulic lift, the operation of can holding up easily and fall.Reactor and standard potential transformer all adopt sulfur hexafluoride gas-insulating, at device interior guarded electrode are set, and make the equipment Electric Field Distribution more even, have improved the dielectric strength of equipment.Reactor and standard potential transformer are fixed to one structure, and integral width is below 2.3 meters, convenient transportation.Through optimal design, can tolerate the physical shock of acceleration of gravity more than 10 times in the complete equipment transportation, calculate through theoretical, quality factor of reactor Q >=10, the standard potential transformer accuracy class reaches the 0.005-0.1 level.
The utility model solves the technical scheme that its technical matters adopted: a kind of ultra, extra-high voltage capacitance type potential transformer error checking complete equipment; Mainly form by grading shield (1), primary connection plate (2), high-pressure conductor (3), insulating sleeve (4), threeway flange (5), standard potential transformer (6), web joint (7), reactor (8), driver transformer (9), pressure regulator (10), electrical control panel (11), hydraulic platform (12), Hydraulic Station (13), hydraulic cylinder (14), support (15), hydrostatic control cabinet (16) etc.; It is characterized in that: grading shield (1) is installed in primary connection plate (2) upper end; Primary connection plate (2) is connected insulating sleeve (4) one ends; Insulating sleeve (4) other end is connected on the threeway flange (5); Threeway flange (5) lower end is connected with standard potential transformer (6) and reactor (8) upper flanges respectively; Standard potential transformer (6) and reactor (8) upper flanges realize being electrically connected through high-pressure conductor (3); Web joint (7) is connected with standard potential transformer (6) and the following end flanges of reactor (8) respectively; The casing side of standard potential transformer (6) and reactor (8) is welded with a pair of main shaft, and threeway flange (5) side is welded with a pair of main shaft, and the voltage input end of pressure regulator (10) connects AC power; The voltage output end of pressure regulator (10) is connected with the voltage input end of driver transformer (9); The voltage output end of driver transformer (9) is connected with the low pressure end of reactor (8), the output end voltage of electrical control panel (11) control pressure regulator (10), the current value of electrical control panel (11) display standard voltage transformer (VT) (6) measured voltage value and reactor (8).
It is characterized in that: sulfur hexafluoride gas is filled in reactor (8) and standard potential transformer (6) inside, and both connect together through threeway flange (5), realizes being electrically connected through high-pressure conductor (3) in inside.
It is characterized in that: reactor (8) and the shared insulating sleeve of standard potential transformer (6) (4).
It is characterized in that: reactor (8) and standard potential transformer (4) realize holding up and falling operation through hydraulic lift.
The beneficial effect of the utility model is, reactor (8) and standard potential transformer (6) all adopt the sulfur hexafluoride gas-insulating technology, and inside is placed with guarded electrode, has improved apparatus insulated intensity.Reactor (8) and standard potential transformer (6) are connected to one through threeway flange (5), and the inner high-pressure conductor (3) that adopts is realized being electrically connected, and testing crew needn't arrive the eminence wiring, has improved the security of testing crew.Reactor (8) and the shared insulating sleeve of standard potential transformer (6) (4), both overall fixed on hydraulic lift, the operation of can holding up easily and fall, the reactor width is below 2.3 meters, convenient transportation.
(4) description of drawings
Fig. 1 is the cross section view of the utility model.
Fig. 2 is the equivalent electrical schematic diagram of the utility model.
Fig. 3 is the electric hookup of the utility model.
Fig. 4 is reactor, the standard potential transformer synoptic diagram that fell.
Fig. 5 is that reactor, standard potential transformer are holded up synoptic diagram.
1. grading shields among the figure, 2. primary connection plate, 3. high-pressure conductor, 4. insulating sleeve, 5. threeway flange; 6. standard potential transformer, 7. web joint, 8. reactor, 9. driver transformer; 10. pressure regulator, 11. electrical control panels, 12. hydraulic platforms, 13. Hydraulic Stations; 14. hydraulic cylinder, 15. supports, 16. hydrostatic control cabinets, 17. capacitance type potential transformers.
(5) embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
In Fig. 1; Grading shield (1) is installed in primary connection plate (2) upper end; Primary connection plate (2) is connected insulating sleeve (4) one ends; Insulating sleeve (4) other end is connected on the threeway flange (5), and threeway flange (5) lower end is connected with standard potential transformer (6) and reactor (8) upper flanges respectively, and standard potential transformer (6) and reactor (8) upper flanges realize being electrically connected through high-pressure conductor (3); Web joint (7) is connected with standard potential transformer (6) and the following end flanges of reactor (8) respectively; The casing side of standard potential transformer (6) and reactor (8) is welded with a pair of main shaft, and threeway flange (5) side is welded with a pair of main shaft, and the voltage input end of pressure regulator (10) connects AC power; The voltage output end of pressure regulator (10) is connected with the voltage input end of driver transformer (9); The voltage output end of driver transformer (9) is connected with the low pressure end of reactor (8), the output end voltage of electrical control panel (11) control pressure regulator (10), the current value of electrical control panel (11) display standard voltage transformer (VT) (6) measured voltage value and reactor (8).
In Fig. 2; Note explanatory note: JB-driver transformer; The R-equivalent resistance; The L-equivalent inductance; The C-equivalent capacity;
-driver transformer voltage;
-equivalent resistance voltage;
-equivalent inductance voltage;
-equivalent capacity voltage,
-loop current.The present invention adopts the series resonance principle, in the test loop, seals in reactor, when
The time,
Then
This moment, the loop reached resonant condition, when resonant condition, then had
At this moment
Test specimen C goes up the capacity that obtains
Reactor L goes up the capacity S that obtains
L=I
2ω L, the output capacity that excitation becomes is S=UI=U
RI=I
2R, therefore, quality factor
Because ω is L＞＞R, so Q＞＞1 this shows that suitably design the figure of merit value in loop, then resonator system can obtain the capacity that Q doubly imports power supply on test specimen C, can reduce the capacity of experiment power supply greatly.
In Fig. 3; The voltage input end of pressure regulator (10) connects AC power; The voltage output end of pressure regulator (10) is connected with the voltage input end of driver transformer (9); The voltage output end of driver transformer (9) is connected with the low pressure end of reactor (8); The high-pressure side of reactor (8) is connected with the high-pressure side of standard potential transformer (6) and capacitance type potential transformer (17) respectively, and the low-voltage terminal of driver transformer (9), standard potential transformer (6) and capacitance type potential transformer (17) is parallel to ground connection together.
In Fig. 4; The main shaft of reactor (8) and standard potential transformer (6) casing side is fixed on the support (15); Support (15) is welded on the hydraulic platform (12), and threeway flange (5) connects the spindle set of side to hydraulic cylinder (14) upper end, and hydraulic cylinder (14) lower end is fixed on the hydraulic platform (12); Hydraulic Station (13) and hydrostatic control cabinet (16) are fixed on the hydraulic platform (12); Testing crew is through hydrostatic control cabinet action button, and the operation of holding up and fell of reactor (8) and standard potential transformer (6) can be realized in the different operating position of control hydraulic buttery valve.
In Fig. 5, be that reactor (8) and standard potential transformer (6) are holded up synoptic diagram, under shown position, accomplish that capacitance type potential transformer applied power-frequency voltage and error-detecting test.
The utility model reactor (8) housing, standard potential transformer (6) and threeway flange (5) material are Q235A steel plate or 5A02 aluminium sheet, and grading shield (1) material is the 5A02 aluminium sheet, adopt the rotary pressing processing moulding.
The utility model passes through experimental test; Complete equipment overall quality factor Q >=10; The standard potential transformer accuracy class reaches the 0.005-0.1 level, can satisfy testing requirements ultra, scene, extra-high voltage power station applies power-frequency voltage and error-detecting to capacitance type potential transformer.
Claims (4)
1. ultra, extra-high voltage capacitance type potential transformer error checking complete equipment; Mainly form by grading shield, primary connection plate, high-pressure conductor, insulating sleeve, threeway flange, standard potential transformer, web joint, reactor, driver transformer, pressure regulator, electrical control panel, hydraulic platform, Hydraulic Station, hydraulic cylinder, support, hydrostatic control cabinet etc.; It is characterized in that: grading shield is installed in primary connection plate upper end; The primary connection plate is connected insulating sleeve one end; The insulating sleeve other end is connected on the threeway flange, and threeway flange lower end is connected with standard potential transformer and reactor upper flanges respectively, and standard potential transformer and reactor upper flanges realize being electrically connected through high-pressure conductor; Web joint respectively with standard potential transformer and reactor under end flanges be connected; The casing side of standard potential transformer and reactor is welded with a pair of main shaft, and threeway flange side is welded with a pair of main shaft, and the voltage input end of pressure regulator connects AC power; The voltage output end of pressure regulator is connected with the voltage input end of driver transformer; The voltage output end of driver transformer is connected with the low pressure end of reactor, the output end voltage of electrical control panel control pressure regulator, the magnitude of voltage of electrical control panel display standard voltage measuring transformer and the current value of reactor.
2. a kind of ultra, extra-high voltage capacitance type potential transformer error checking complete equipment according to claim 1; It is characterized in that: sulfur hexafluoride gas is filled in reactor and standard potential transformer inside; Both connect together through the threeway flange, realize being electrically connected through high-pressure conductor in inside.
3. a kind of ultra, extra-high voltage capacitance type potential transformer error checking complete equipment according to claim 1 is characterized in that: the shared insulating sleeve of reactor and standard potential transformer.
4. a kind of ultra, extra-high voltage capacitance type potential transformer error checking complete equipment according to claim 1, it is characterized in that: reactor and standard potential transformer realize holding up and falling operation through hydraulic lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120293675.1U CN202189142U (en) | 2011-08-12 | 2011-08-12 | Complete set of error checking device for super/extra-high voltage CVT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120293675.1U CN202189142U (en) | 2011-08-12 | 2011-08-12 | Complete set of error checking device for super/extra-high voltage CVT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202189142U true CN202189142U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120293675.1U Expired - Fee Related CN202189142U (en) | 2011-08-12 | 2011-08-12 | Complete set of error checking device for super/extra-high voltage CVT |
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| Country | Link |
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| CN (1) | CN202189142U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323562A (en) * | 2011-08-12 | 2012-01-18 | 山东泰开互感器有限公司 | Complete set of error checking device for ultrahigh/extra-high voltage capacitor voltage transformer |
| CN105742044A (en) * | 2016-05-11 | 2016-07-06 | 山东泰开互感器有限公司 | 500kV wide-transformation-ratio standard voltage transformer |
| CN107576443A (en) * | 2017-10-12 | 2018-01-12 | 西安亚能电气有限责任公司 | Pressure on-line monitoring system for 750kV high-tension insulating bushings |
| CN111199009A (en) * | 2020-01-15 | 2020-05-26 | 广西电网有限责任公司 | Method and system for evaluating influence of primary wiring on error of capacitive voltage transformer |
-
2011
- 2011-08-12 CN CN201120293675.1U patent/CN202189142U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323562A (en) * | 2011-08-12 | 2012-01-18 | 山东泰开互感器有限公司 | Complete set of error checking device for ultrahigh/extra-high voltage capacitor voltage transformer |
| CN105742044A (en) * | 2016-05-11 | 2016-07-06 | 山东泰开互感器有限公司 | 500kV wide-transformation-ratio standard voltage transformer |
| CN107576443A (en) * | 2017-10-12 | 2018-01-12 | 西安亚能电气有限责任公司 | Pressure on-line monitoring system for 750kV high-tension insulating bushings |
| CN111199009A (en) * | 2020-01-15 | 2020-05-26 | 广西电网有限责任公司 | Method and system for evaluating influence of primary wiring on error of capacitive voltage 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: 20120411 Termination date: 20140812 |
|
| EXPY | Termination of patent right or utility model |