CN101901680A - Electronic type voltage transformer - Google Patents
Electronic type voltage transformer Download PDFInfo
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- CN101901680A CN101901680A CN2009100227033A CN200910022703A CN101901680A CN 101901680 A CN101901680 A CN 101901680A CN 2009100227033 A CN2009100227033 A CN 2009100227033A CN 200910022703 A CN200910022703 A CN 200910022703A CN 101901680 A CN101901680 A CN 101901680A
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Abstract
The invention relates to an electronic type voltage transformer. The electronic type voltage transformer comprises a cylindrical measuring electrode and a high-voltage electrode bar, wherein the high-voltage electrode bar is arranged in the cylindrical measuring electrode; and the cylindrical measuring electrode is connected in series with a voltage-dividing capacitor. The electronic type voltage transformer has the characteristics of small volume, light weight and convenient installation and movement. At the same time, the electronic type voltage transformer is not provided with a ferromagnetic core and a coil, so a large number of copper enameled wires and silicon-steel sheets are saved and cost is greatly reduced; and the high-voltage voltage-dividing capacitor of the electronic type voltage transformer is a gas capacitor, so the electronic type voltage transformer has the characteristics of high stability, good voltage characteristic and temperature characteristic, high accuracy and wide measurement range. The electronic type voltage transformer divides the voltage by the capacitor, acquires the divided voltage, and performs data processing, data compensation and electronic-to-optical conversion to output in an optical data form so as to realize digital quantity output.
Description
Technical field
The present invention relates to a kind of voltage transformer, especially a kind of electronic type voltage transformer that is applied to GIS (Gas InsulatedSwitchgear) sulphur hexafluoride gas insulated metal enclosed swit chgear.
Background technology
Voltage transformer be the primary side cross-over connection between high-voltage fence bus and ground, secondary side is connected on wattmeter, kilowatt-hour meter and the mechanical and electrical protection equipment, and the device of bus voltage signal is provided for mechanical and electrical protection equipment and electric energy metrical.The voltage transformer that GIS (Gas Insulated Switchgear) sulphur hexafluoride gas insulated metal enclosed swit chgear is used is owing to be to be installed on the sulphur hexafluoride gas insulated metal enclosed swit chgear, and its structure and installation to voltage transformer has proposed special requirement.
Because high-voltage fence voltage is very high, and is also very high to the insulating requirements of voltage transformer; And certainty of measurement required also very highly (generally to require 0.2 grade; 3P); traditional voltage transformer based on electromagnetic coupling theory; its principle is a transformer principle; its structure is just as the transformer of low capacity; the first siding ring cross-over connection is between high-voltage fence bus and ground, and the second siding ring output voltage provides signal for mechanical and electrical protection equipment and electric energy metrical.High-voltage fence voltage is very high, core section that will the changes persuing depressor long-pending enough greatly and coil turn very big.Complex structure; Bulky; Weight is big, and electric pressure is expensive more high more, makes that traditional voltage transformer that is installed on the sulphur hexafluoride gas insulated metal enclosed swit chgear is bulky, weight is big, the cost height, and it is very high that insulation property also are difficult to do, and analog quantity output can not be satisfied the requirement of digital transformer substation.
Summary of the invention
Above-mentioned technical problem for the voltage transformer that solves in the background technology exists the invention provides a kind of electronic type voltage transformer.
Technical solution of the present invention is: the present invention is a kind of electronic type voltage transformer, its special character is: this electronic type voltage transformer comprises cylindric measurement electrode and is arranged on the interior high-field electrode rod of cylindric measurement electrode, is serially connected with dividing potential drop electric capacity on the cylindric measurement electrode.
Above-mentioned cylindric measurement electrode and the coaxial setting of high-field electrode rod.
The two ends up and down of above-mentioned cylindric measurement electrode are respectively arranged with on the measurement electrode changeover portion under the changeover portion and measurement electrode, on the measurement electrode under changeover portion, the measurement electrode changeover portion all be cylindric and internal diameter identical with the internal diameter of cylindric measurement electrode.
This electronic type voltage transformer also includes the insulator that contains metal insert, and metal insert is electrically connected to the high-field electrode rod.
This electronic type voltage transformer also includes housing, on measurement electrode, high-field electrode rod, the measurement electrode under changeover portion and the measurement electrode changeover portion all be arranged in the housing and and be connected housing and the airtight air chamber of insulator formation with housing.
Above-mentioned housing is provided with density controller and inflation triple valve, and this inflation triple valve inserts air chamber and density controller respectively.
Above-mentioned high-field electrode rod and cylindric measurement electrode all are one or three, and when high-field electrode rod and cylindric measurement electrode all were three, each ring-type measurement electrode outer periphery was equipped with separation net.
This electronic type voltage transformer also includes the signal picker that carries out signal processing and the conversion of signal electric light, and signal picker is connected with measurement electrode by shielded conductor.
On the above-mentioned measurement electrode under changeover portion and the measurement electrode extension of changeover portion all are arcs.
Be respectively arranged with dead ring between changeover portion and the cylindric measurement electrode under changeover portion, the measurement electrode on the above-mentioned measurement electrode.
Above-mentioned insulator is a disc insulator.
Because electronic type voltage transformer of the present invention adopts technology such as coaxial capacitance dividing potential drop, data acquisition process, and is installed on cleverly in the tank body, realize and GIS sulphur hexafluoride (SF
6) butt joint of gas insulated metal enclosed swit chgear, therefore to have a volume little, in light weight for electronic type voltage transformer of the present invention, and the characteristics very easily that move are installed; Simultaneously, electronic type voltage transformer of the present invention has been saved a large amount of copper enamelled wire and silicon steel sheet owing to do not have ferromagnetic core and coil, has reduced cost greatly; And, have high accuracy, the wide characteristics of measuring range because electronic type voltage transformer of the present invention so stability is very good, has good voltage characteristic and temperature characterisitic because its high pressure dividing potential drop electric capacity is gas electric capacity; Because the high-voltage capacitance dielectric of electronic type voltage transformer of the present invention adopts SF
6, can design according to the needs of electric pressure; The present invention gathers branch pressure voltage then by capacitance partial pressure, and the line data of going forward side by side is handled, compensation data, and last electric light conversion, the form output with the light data has realized digital quantity output; And under the measurement electrode of the present invention on changeover portion and the measurement electrode changeover portion guaranteed the uniformity that electric field distributes on measurement electrode, thereby guaranteed the linearity of amplitude ratio of the voltage on voltage division signal and the high-field electrode and the precision of phase difference.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention;
Fig. 2 is the cutaway view of the specific embodiment of the invention;
Fig. 3 is the schematic diagram of binding post of the present invention.
Embodiment
Electronic type voltage transformer of the present invention comprises cylindric measurement electrode and is arranged on the interior high-field electrode rod of cylindric measurement electrode, be serially connected with dividing potential drop electric capacity on the cylindric measurement electrode, cylindric measurement electrode and the coaxial voltage-dividing capacitor of the common formation of high-field electrode rod.Wherein cylindric measurement electrode needs coaxial setting with the high-field electrode rod, to guarantee insulating requirements and certainty of measurement.Cylindric measurement electrode is only around the mid portion that is arranged on the high-field electrode rod, and the two ends up and down of cylindric measurement electrode are respectively arranged with on the measurement electrode changeover portion under the changeover portion and measurement electrode.On the measurement electrode under changeover portion, the measurement electrode changeover portion all be cylindric and internal diameter identical with the internal diameter of cylindric measurement electrode, on the measurement electrode under changeover portion, the measurement electrode changeover portion can guarantee the uniformity that electric field distributes on cylindric measurement electrode, and then guaranteed the linearity of amplitude ratio of the voltage on voltage division signal and the high-field electrode rod and the precision of phase difference.On the measurement electrode under changeover portion and the measurement electrode extension of changeover portion all are arcs.Be respectively arranged with dead ring between changeover portion and the cylindric measurement electrode under changeover portion, the measurement electrode on the measurement electrode, to guarantee the insulating properties between the changeover portion and cylindric measurement electrode under changeover portion on the measurement electrode, the measurement electrode.This electronic type voltage transformer also includes the insulator that contains metal insert, and metal insert is electrically connected to the high-field electrode rod.This electronic type voltage transformer also includes housing, on measurement electrode, high-field electrode rod, the measurement electrode under changeover portion and the measurement electrode changeover portion all be arranged in the housing and and be connected housing and the airtight air chamber of insulator formation with housing.Housing is provided with density controller and inflation triple valve, and this inflation triple valve inserts air chamber and density controller respectively.High-field electrode rod and cylindric measurement electrode all are one or three, and when high-field electrode rod and cylindric measurement electrode all were three, each ring-type measurement electrode outer periphery was equipped with separation net.When institute's circuit closer circuit when being single-phase, high-field electrode rod and cylindric measurement electrode all are one, and when institute's circuit closer circuit is three phase times, the excellent and cylindric measurement electrode of high-field electrode all is three.This electronic type voltage transformer also includes the signal picker that carries out signal processing and the conversion of signal electric light, and signal picker is connected with measurement electrode by shielded conductor.Insulator is a disc insulator.
Referring to Fig. 1,2,3, a specific embodiment of the present invention is to utilize the three-phase combined type type electronic type voltage transformer that uses on the GIS sulphur hexafluoride gas insulated metal enclosed swit chgear of concentric capacitance partial pressure art designs.High-field electrode rod 4 and cylindric measurement electrode 5 in the three-phase combined type type electronic type voltage transformer among this embodiment all are three, each high-field electrode rod 4 and be a combination wherein around being arranged on these high-field electrode rod 4 outer cylindric measurement electrode 5, in order to prevent the influencing each other of high-field electrode rod 4 between each such combination, therefore on each measurement electrode, be provided with electric field isolation net 8 outside the changeover portion 7, be used to eliminate influencing each other between each high-field electrode rod 4 of isolation.
Binding post 14:A, B in the GIS sulfur fluoride gas insulated metal enclosed swit chgear, C three-phase high-voltage bus respectively by with disc insulator 1 that housing 2 connects on three metal inserts high voltage is guided to three high-field electrode rods 4 corresponding and that metal insert is electrically connected; Each constitutes a coaxial voltage-dividing capacitor to cylindric measurement electrode 5 and high-field electrode rod 4, the two ends up and down of this cylindric measurement electrode 5 are respectively arranged with and are used to guarantee electric field changeover portion 7 on changeover portion 3 and measurement electrode under the inhomogeneity measurement electrode that distributes on the cylindric measurement electrode 5, and the housing 2 of this electronic type voltage transformer constitutes airtight SF with disc insulator 1
6Air chamber is to guarantee the insulation property of voltage-dividing capacitor.Wherein, on the electrode under changeover portion 7, the measurement electrode changeover portion 3 all be cylindraceous and its internal diameter identical with the internal diameter of cylindric measurement electrode 4.
And be arranged on SF on the housing 2
6 Density controller 10 is used to monitor SF
6The leakage of gas; Be arranged on and inflate triple valve 11 on the housing 2 for regularly detecting SF
6Parameter and additional SF such as little water
6Usefulness.
Each cylindric measurement electrode 5 serial connections one dividing potential drop electric capacity by measuring the voltage of each dividing potential drop electric capacity, just can calculate the voltage of high-field electrode rod 4.By shielded conductor the cylindric measurement electrode 5 of A, B, C three-phase is introduced signal picker 9, signal picker 9 comprises A/D conversion, CPU (or DSP) and electrical to optical converter, the circuit of signal picker 9 is by nursing one's health, gather the branch pressure voltage on the dividing potential drop electric capacity, carry out the A/D conversion again, again the digital signal after the A/D conversion is compensated by CPU (or DSP) and handle and coding, convert the light digital signal to by electrical to optical converter then, export by signal outlet 13 with the form of light data.Signal Collection Technology belongs to the common sense technology of this area, so the physical circuit formation of signal picker 9 is not described in detail.
Be respectively arranged with dead ring 6 between changeover portion 3 and the cylindric measurement electrode 5 under changeover portion 7, the measurement electrode on the measurement electrode, to guarantee on the measurement electrode insulating properties between the changeover portion 3 and cylindric measurement electrode 5 under changeover portion 7, the measurement electrode.And the insulating properties between cylindric measurement electrode 5 and the housing 2.
Among this embodiment, high-field electrode rod 4 and 5 of cylindric measurement electrode are the FS by charging into
6Gas-insulated because high-field electrode rod 4 and cylindric measurement electrode 5 coaxial settings, has therefore constituted and comprises high-field electrode rod 4 and cylindric measurement electrode 5 and charge into insulating gas FS
6Gas electric capacity, can realize the electric pressure design of this voltage transformer, and have extraordinary stability that well voltage characteristic and temperature characterisitic have high accuracy, the wide characteristics of measuring range.
High-field electrode rod 5 is installed on the metal insert of disc insulator 1, and disc insulator 1 is the strutting piece of high-field electrode rod 5.
Also be provided with ground connection piece 12 on the housing 2.
Claims (10)
1. electronic type voltage transformer is characterized in that: this electronic type voltage transformer comprises cylindric measurement electrode and is arranged on high-field electrode rod in the cylindric measurement electrode, is serially connected with dividing potential drop electric capacity on the described cylindric measurement electrode.
2. electronic type voltage transformer according to claim 1 is characterized in that: described cylindric measurement electrode and the coaxial setting of high-field electrode rod.
3. electronic type voltage transformer according to claim 2, it is characterized in that: the two ends up and down of described cylindric measurement electrode are respectively arranged with on the measurement electrode changeover portion under the changeover portion and measurement electrode, on the described measurement electrode under changeover portion, the measurement electrode changeover portion all be cylindric and internal diameter identical with the internal diameter of cylindric measurement electrode.
4. electronic type voltage transformer according to claim 3 is characterized in that: this electronic type voltage transformer also includes the insulator that contains metal insert, and described metal insert is electrically connected to the high-field electrode rod.
5. electronic type voltage transformer according to claim 4, it is characterized in that: this electronic type voltage transformer also includes housing, on described measurement electrode, high-field electrode rod, the measurement electrode under changeover portion and the measurement electrode changeover portion all be arranged in the housing, described housing and insulator constitute airtight air chamber.
6. electronic type voltage transformer according to claim 5 is characterized in that: described housing is provided with density controller and inflation triple valve, and this inflation triple valve inserts air chamber and density controller respectively.
7. according to claim 1 or 2 or 3 or 4 or 5 or 6 described electronic type voltage transformers, it is characterized in that: described high-field electrode rod and cylindric measurement electrode all are one or three, when described high-field electrode rod and cylindric measurement electrode all were three, each ring-type measurement electrode outer periphery was equipped with separation net.
8. electronic type voltage transformer according to claim 7 is characterized in that: this electronic type voltage transformer also includes the signal picker that carries out signal processing and the conversion of signal electric light, and described signal picker is connected with measurement electrode by shielded conductor.
9. electronic type voltage transformer according to claim 3 is characterized in that: on the described measurement electrode under changeover portion and the measurement electrode extension of changeover portion all are arcs.
10. electronic type voltage transformer according to claim 3 is characterized in that: be respectively arranged with dead ring between changeover portion and the cylindric measurement electrode under changeover portion, the measurement electrode on the described measurement electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100227033A CN101901680A (en) | 2009-05-26 | 2009-05-26 | Electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100227033A CN101901680A (en) | 2009-05-26 | 2009-05-26 | Electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101901680A true CN101901680A (en) | 2010-12-01 |
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ID=43227144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100227033A Pending CN101901680A (en) | 2009-05-26 | 2009-05-26 | Electronic type voltage transformer |
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| CN (1) | CN101901680A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474221A (en) * | 2013-09-05 | 2013-12-25 | 江苏思源赫兹互感器有限公司 | Novel voltage transformer |
| CN105469970A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | Hierarchical type current voltage combined transformer |
| CN105632744A (en) * | 2015-12-04 | 2016-06-01 | 国家电网公司 | Gas-insulated stagewise combined current and voltage transformer |
-
2009
- 2009-05-26 CN CN2009100227033A patent/CN101901680A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474221A (en) * | 2013-09-05 | 2013-12-25 | 江苏思源赫兹互感器有限公司 | Novel voltage transformer |
| CN103474221B (en) * | 2013-09-05 | 2015-09-23 | 江苏思源赫兹互感器有限公司 | A kind of novel voltage transformer |
| CN105469970A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | Hierarchical type current voltage combined transformer |
| CN105632744A (en) * | 2015-12-04 | 2016-06-01 | 国家电网公司 | Gas-insulated stagewise combined current and voltage transformer |
| CN105469970B (en) * | 2015-12-04 | 2017-08-22 | 国家电网公司 | Stagewise Current Voltage combination transformer |
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Application publication date: 20101201 |