CN201110866Y - Extra-high voltage reference capacitor - Google Patents
Extra-high voltage reference capacitor Download PDFInfo
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- CN201110866Y CN201110866Y CNU2007200890348U CN200720089034U CN201110866Y CN 201110866 Y CN201110866 Y CN 201110866Y CN U2007200890348 U CNU2007200890348 U CN U2007200890348U CN 200720089034 U CN200720089034 U CN 200720089034U CN 201110866 Y CN201110866 Y CN 201110866Y
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Abstract
The utility model relates to an ultra-high voltage standard capacitor, which is an upright type structure that a high voltage electrode and a low voltage electrode are fixed in a pressure vessel tank body arranged at the bottom via an insulation support, thereby overcoming the problem that the increasing of the voltage class of the standard capacitor influences the increasing of the voltage coefficient of the standard capacitor. Aiming at the structure for a field test, the utility model divides the standard capacitor into 3 independent sealed air chambers, thereby solving the trouble that large-scale test equipments are not convenient to transport the capacitor, and bringing convenience for field test and detection. When the utility model is used to the ultra-high voltage standard capacitor, the insulation level is quite high, withstand ability of short time power frequency voltage can be over 1600kV, long time rated working voltage can be over 1200kV, and voltage coefficient is superior to 2*10(-6). The ultra-high voltage standard capacitor also can be used to produce a standard capacitor, wherein the rated working voltage is lower than 1600kV.
Description
Technical field
The utility model belongs to high voltage measuring equipment, relate to a kind of 800kV～1600kV electric pressure extra-high voltage reference capacitor, be applicable to the extra-high voltage fields of measurement such as voltage coefficient measurement of the measurement of extra-high voltage reference capacitor value, extra-high voltage electrical equipment dielectric loss measurement, the calibration of extra-high voltage voltage divider intrinsic standoff ratio, extra-high voltage standard potential transformer.
Background technology
Along with the paces of China's extra-high voltage grid technical research and construction are accelerated, original high voltage measuring equipment can not be satisfied the demand.The characteristic parameter of the precision measurement of extra-high voltage equipment electric capacity and dielectric loss, extra-high voltage metering outfit such as AC extra high voltage standard potential transformer is measured, and all needs the means of testing of the higher standard capacitor of electric pressure as indispensability.
Standard capacitor in the past all is inverted structure, for example: the standard capacitor structure that " the electric capacity stability research of the 1000kV standard capacitor " literary composition on " power capacitor " 2006 the 6th phases is introduced, low-field electrode (interior electrode) is the pillar cantilever beam structure, is fixed on the base; High-field electrode is the bell-jar structure, on the top of apparatus insulated tube.Along with the raising of electric pressure, interelectrode insulation distance increases, and the low-field electrode height increases, and it is extremely inhomogeneous to cause internal field to distribute.Simultaneously, the low-field electrode moment of cantilever beam structure strengthens, the trend that skew takes place for concentricity between high-field electrode and low-field electrode, right alignment strengthens, make the voltage coefficient (be electric capacity and apply linear relationship between the voltage magnitude) of standard capacitor become worse and worse, cause the uncertainty of precision measurement test product electric capacity, dielectric loss amount to enlarge.The highest nominal electric pressure of commercial in the world inverted construction standard capacitor is 1200kV at present, but the real work voltage under the usual conditions should not surpass 800kV, otherwise need additional many conditions, envionmental humidity as strictness, apply voltage extremely slowly, the harmonic content of power supply is strictly controlled etc.In addition, the low-field electrode of inverted standard capacitor is a cantilever beam structure, equipment transportation and the on-the-spot top shake that generation is installed cause cantilever support bar and pipe that creep bending takes place easily, make to be easy to be subjected to displacement between low-field electrode and high-field electrode, cause voltage coefficient further to increase.Along with the increase and the equipment size increasing of electric pressure, the difficulty of the processing of concentricity, right alignment, installation, detection, adjusting and control also increases greatly between the electrode of inverted standard capacitor.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes on the existing standard capacitor arrangement, a kind of just vertical extra-high voltage reference capacitor is provided, be applicable to 800kV～1600kV electric pressure, and electrode concentricity and right alignment are easy to control, device fabrication realizes, effectively prevents the electrode supporting creep bending easily, insulation margin big, be convenient to installation and transportation, also can be used for the extra-high voltage equipment in-site measurement.
The technical solution of the utility model is: a kind of extra-high voltage reference capacitor, it is characterized in that: be that high-field electrode and low-field electrode all are fixed on positive vertical structure in the base pressure tank body of container with insulated support, form by tank body 1, bushing 2, high pressure grading ring 3 and earth potential grading ring 4, tank body 1 and bushing 2 can be two independently air chamber so that dismounting transportation is used for the field experiment chamber, also can be an air chamber and be used for fixing the laboratory, inside is all filled with SF
6Gas-insulated, bushing 2 are above tank body 1, and high pressure grading ring 3 and earth potential grading ring 4 are at the two ends of bushing 2; Bushing 2 is combined by compound insulating sleeve 5, intermediate potential radome 6, earth potential radome 7 and high-field electrode pipe 8, and the lower end of high-field electrode pipe 8 is fixed in the base in the tank body 1 in the heart by insulated support 9; The tank body 1 interior guarded electrode 12 that also has high-field electrode 10, low-field electrode 11 and can realize potential tracking method, they are successively between the lower end and tank body 1 wall of high-field electrode pipe 8, one group of insulated support 13 of high-field electrode 10 usefulness is fixed on the tank body base plate, and high-field electrode 10 is connected with high-field electrode pipe 8 usefulness flexible circuit conductors 14; Fix to adjust high-field electrode 10 and the both adjustment of concentricity of low-field electrode 11 relative positions with two-layer a plurality of insulation support rods 15 between low-field electrode 11 and guarded electrode 12 and tank body 1 wall, high-field electrode 10, low-field electrode 11 and guarded electrode 12 all are donuts.
Above-mentioned extra-high voltage reference capacitor is characterized in that: the internal diameter of bushing 2 is more than or equal to 960 millimeters, and its height is more than or equal to 8 meters.
Above-mentioned extra-high voltage reference capacitor, it is characterized in that: a transition air chamber 16 is arranged between bushing 2 and tank body 1, two disc insulators 17 and two Mume flower contact connecting elements 18 are arranged, so that bushing of extra-high voltage reference capacitor 2 and tank body 1 are taken transportation apart in the transition air chamber 16.
Above-mentioned extra-high voltage reference capacitor is characterized in that: low-field electrode 11 and guarded electrode 12 are double-layer structures up and down.
The utility model is a kind of just vertical extra-high voltage reference capacitor, does not have inverted standard capacitor cantilever beam structure, and the raising that has overcome the standard capacitor electric pressure influences the problem of the raising of its voltage coefficient; High-field electrode 10 of the present utility model and high-field electrode pipe 8 support with insulated support 13 and insulating part 9 respectively, carry out current potential with flexible circuit conductor 14 and connect, to reduce the influence of external force that high-field electrode pipe 8 various factorss (expand with heat and contract with cold as vibrations, metal tube etc.) produce the high-field electrode relative position; A kind of structure of the present utility model is that standard capacitor is divided into 3 independent sealed air chambers, solved the difficult problem of large-scale experiment equipment inconvenience transportation, for use in site test and detection, comprise the transmission of quantity value of extra-high voltage reference capacitor and the scene detection of extra-high voltage reference fluid loss device; The utility model has adopted guarded electrode 12, can connect potential tracking method to reduce the leakage current influence of low-field electrode 11, improves electric property; The utility model can be brought up to 1800kV with the electric pressure of standard capacitor, and voltage coefficient can be better than 1 * 10
-5, dielectric loss is better than 1 * 10
-4Transition air chamber of the present utility model adopts the disc insulator structure to be particularly suitable for dismounting, transportation, be fit to on-the-spot the use, for performance study and the parametric test that is used for 1000kV AC extra high voltage power transmission and transforming equipment creates conditions, also provide technical guarantee for 1000kV and even more high-tension power-frequency voltage ratio standard magnitude tracing.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1, structural drawing of the present utility model;
Fig. 2, example structure figure of the present utility model;
Fig. 3, the structural drawing of tank body 1 of the present utility model;
Fig. 4, the cross-sectional view of tank body 1 of the present utility model.
Among the figure, 1 tank body, 2 bushings, 3 high pressure grading rings, 4 earth potential grading rings, 5 compound insulating sleeves, 6 intermediate potential radomes, 7 earth potential radomes, 8 high-field electrode pipes, 9 insulated supports, 10 high-field electrodes, 11 low-field electrodes, 12 guarded electrodes, 13 insulated supports, 14 flexible circuit conductors, 15 insulation support rods, 16 transition air chambers, 17 disc insulators, 18 Mume flower contact assemblies.
Concrete embodiment
Fig. 1 is a structural drawing of the present utility model, the utility model is a kind of extra-high voltage reference capacitor that high-field electrode and low-field electrode all is fixed on the positive vertical structure in the gas isolated pressure vessel tank body of bottom SF6 with insulated support, be made up of tank body 1, bushing 2, high pressure grading ring 3 and earth potential grading ring 4, tank interior is filled with SF
6Gas-insulated, bushing 2 are above tank body 1, and high pressure grading ring 3 and earth potential grading ring 4 are at the two ends of bushing 2; Bushing 2 is combined by compound insulating sleeve 5, intermediate potential radome 6, earth potential radome 7 and high-field electrode pipe 8, and the lower end of high-field electrode pipe 8 is fixed in the base in the tank body 1 in the heart by insulated support 9.
Fig. 2 is the structural drawing of the utility model embodiment, has increased a transition air chamber 16 on an air chamber structure, has increased disc insulator 18 and the Mume flower contact assembly 18 that is electrically connected effect between tank body 1 and bushing 2.
Tank body 1 inner structure and bushing 2 inner structures in two kinds of structures are basic identical, in Fig. 3, high-field electrode 10, low-field electrode 11 and guarded electrode 12 are arranged in the tank body 1, they are successively between the lower end and tank body 1 wall of high-field electrode pipe 8, high-field electrode radome 10 be fixed on the coaxial insulated support 13 of insulated support 9 on and be connected with high-field electrode pipe 8 with flexible circuit conductor 14, in Fig. 4, fix with two-layer eight insulation support rods 15 between low-field electrode 11 and guarded electrode 12 and tank body 1 wall.
Just vertical extra-high voltage reference capacitor adopts SF
6Gas is as the major insulation medium; High-field electrode pipe 8 and high-field electrode 10 are fixed on the base of tank body 1 with two groups of separate insulated supports 9 and insulated support 13 respectively, and the high-field electrode pipe 8 external carbuncle effect that causes reasons such as the stress of the inconsistent generation of different objects expansion coefficient and equipment hoisting, transportation to produce because of temperature variation can not have influence on the relative geometry position of high-field electrode 10 and low-field electrode 11 like this; Adopt the flexible circuit conductor ways of connecting between high-field electrode 10 and the high-field electrode pipe 8, guarantee that high-voltage connection and high-field electrode current potential equate; Adopt fixedly high-field electrode 10 of many (more than two) insulated supports 13, so that adjust the symmetry of its relatively low pressure electrode 11 physical dimension positions; Low-field electrode 11 and guarded electrode 12 adopt a plurality of insulation support rods 15 to be fixed on the tank body 1, and guarantee that enough dielectric strengths are arranged, and 1min industrial frequency withstand voltage level in short-term is not less than 5kV (effective value); Bushing 2 is combined by compound insulating sleeve 5, intermediate potential radome 6, earth potential radome 7 and high-field electrode pipe 8; High pressure grading ring 3, earth potential grading ring 4 are used to improve the dielectric level of bushing 2, and high-field electrode 10, low-field electrode 11 and guarded electrode 12 all are donuts; The internal diameter of bushing 2 should be more than or equal to 960 millimeters, and its height should be more than or equal to 8 meters.
Often be transported to on-the-spot situation about using for needs, just vertical extra-high voltage reference capacitor on Fig. 1 basis can increase transition air chamber 16, the just vertical extra-high voltage reference capacitor (see figure 2) that the transitional gas cell structure is arranged is at pressure vessel tank body 1 and SF that high-field electrode 10, low-field electrode 11 are installed
6Disc insulator 17 is installed between the gas-insulated composite bushing 5, with two disc insulators 17 tank body 1, compound insulating sleeve 5 and transition air chamber 16 is divided into the cabin of three separate sealings, so that the dismounting transportation, tank body 1 is answered vertical transportation; Only transition air chamber 16 is discharged during dismounting or apply SF
6Gas, so that the frequent dismounting of standard capacitor, transport, be used for on-the-spot the use, the transition that Mume flower contact assembly 18 is used for high-voltage connection connects, can the effect of buffer mechanism power.
This be a kind of voltage coefficient minimum, be convenient to transport and the on-the-spot extra-high voltage measuring appliance that uses, can be used for the dielectric loss measurement of the detection of high pressure standard capacitance, the measurement of high pressure standard potential transformer voltage coefficient and high-tension apparatus (device), its principle also can be extended to the manufacturing that electric pressure is lower than 800kV electric pressure standard capacitor.
Claims (4)
1, a kind of extra-high voltage reference capacitor, it is characterized in that: be that high-field electrode and low-field electrode all are fixed on positive vertical structure in the pressure vessel tank body of bottom with insulated support, form by tank body (1), bushing (2), high pressure grading ring (3) and earth potential grading ring (4), tank body (1) and bushing (2) are two independently air chambers, and SF is all used in inside
6Gas-insulated, bushing (2) is in tank body (1) top, and high pressure grading ring (3) and earth potential grading ring (4) are at the two ends of bushing (2); Bushing (2) is combined by compound insulating sleeve (5), intermediate potential radome (6), earth potential radome (7) and high-field electrode pipe (8), and the lower end of high-field electrode pipe (8) is fixed in the base in the tank body (1) in the heart by insulated support (9); Also has high-field electrode (10) in the tank body (1), low-field electrode (11) and guarded electrode (12), they are successively between the lower end and tank body (1) wall of high-field electrode pipe (8), high-field electrode (10) is connected with high-field electrode pipe (8) by being fixed on the base of tank body (1) and with flexible circuit conductor (14) with the coaxial insulated support (13) of insulated support (9), fixing between low-field electrode (11) and guarded electrode (12) and tank body (1) wall with two-layer a plurality of insulation support rods (15), high-field electrode (10), low-field electrode (11) and guarded electrode (12) all are donuts.
2, extra-high voltage reference capacitor as claimed in claim 1 is characterized in that: the internal diameter of bushing (2) is more than or equal to 960 millimeters, and its height is more than or equal to 8 meters.
3, extra-high voltage reference capacitor as claimed in claim 2 is characterized in that: a transition air chamber (16) is arranged between bushing (2) and tank body (1), two disc insulators (17) and two Mume flower contact assemblies (18) are arranged in the transition air chamber (16).
4, as claim 2 or 3 described extra-high voltage reference capacitors, it is characterized in that: low-field electrode (11) and guarded electrode (12) are double-layer structures up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200890348U CN201110866Y (en) | 2007-12-17 | 2007-12-17 | Extra-high voltage reference capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200890348U CN201110866Y (en) | 2007-12-17 | 2007-12-17 | Extra-high voltage reference capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110866Y true CN201110866Y (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200890348U Expired - Lifetime CN201110866Y (en) | 2007-12-17 | 2007-12-17 | Extra-high voltage reference capacitor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201110866Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521064B (en) * | 2009-04-28 | 2011-08-24 | 南通市神马电力科技有限公司 | Supporting piece for bushing electrode |
| CN102901879A (en) * | 2012-09-20 | 2013-01-30 | 中国电力科学研究院 | Standard capacitor installed by separated type coaxial structure |
| CN109003813A (en) * | 2018-07-10 | 2018-12-14 | 昆山国力电子科技股份有限公司 | A kind of vacuum condenser |
-
2007
- 2007-12-17 CN CNU2007200890348U patent/CN201110866Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521064B (en) * | 2009-04-28 | 2011-08-24 | 南通市神马电力科技有限公司 | Supporting piece for bushing electrode |
| CN102901879A (en) * | 2012-09-20 | 2013-01-30 | 中国电力科学研究院 | Standard capacitor installed by separated type coaxial structure |
| WO2014044080A1 (en) * | 2012-09-20 | 2014-03-27 | 国家电网公司 | Standard capacitor mounted using separated-type co-axial structure |
| CN109003813A (en) * | 2018-07-10 | 2018-12-14 | 昆山国力电子科技股份有限公司 | A kind of vacuum condenser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071217 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |