CN1508819A - Dry capacitor type voltage transformer - Google Patents
Dry capacitor type voltage transformer Download PDFInfo
- Publication number
- CN1508819A CN1508819A CNA021566062A CN02156606A CN1508819A CN 1508819 A CN1508819 A CN 1508819A CN A021566062 A CNA021566062 A CN A021566062A CN 02156606 A CN02156606 A CN 02156606A CN 1508819 A CN1508819 A CN 1508819A
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- capacitor voltage
- voltage divider
- dry type
- battery lead
- capacity cell
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Abstract
The invention relates to dry type capacitor voltage transformer utilized in AC high voltage power system and DC electrical power system with 110KV and higher voltage. The transformer comprises capacitor voltage divider utilized in circuit board for signal conversion and amplification treatment. The capacitor voltage divider in insulating sleeve comprises two pieces of cascaded capacitive components. Umbrella skirt covers the insulating sleeve. Based on need, voltage signal is picked out from a plate electrode in middle of the cascaded capacitive components. The said signal through the circuit board for signal conversion and amplification treatment is output to measuring and displaying device and protecting device. Advantages of the invention are dry type, free of maintenance, high insulating strength and small volume.
Description
Technical field
The invention belongs to measurement and protection equipment in the electric power system, particularly a kind ofly be used for the voltage transformer that ac high-voltage contains 110KV and above electric power system and direct current power system.
Background technology
The voltage transformer that uses in the ac high-voltage electric power system of 110KV and above electric pressure at present is divided into two kinds.A kind of is electromagnetic potential transformer, excites ferro resonance easily, poor reliability in service, cost height; Another kind is a capacitance type potential transformer, and its operation principle is the tap voltage value by capacitor voltage divider, reflects the magnitude of voltage of high-pressure side; Tap is received on the calutron, and calutron is made up of intermediate transformer, compensation reactor and ferro resonance control loop; The multiloop secondary winding of intermediate transformer provides output voltage to be used for measuring and protection.Capacitance type potential transformer is convenient to safeguard with respect to the electromagnetic potential transformer low cost of manufacture, and is reliable.But existing capacitance type potential transformer is that capacitor voltage divider is encapsulated in the vertical insulating cylinder on the market, injects insulating oil or insulating gas in insulating cylinder; This structure makes capacitance type potential transformer can cause leakage, environmental pollution unavoidably in installing and using; Wei Xiu cost is also higher in addition.
Summary of the invention
The objective of the invention is to provide a kind of dry type capacitance type potential transformer that does not have oil, no gas.
The object of the present invention is achieved like this, comprise that capacitor voltage divider is installed in the insulating sleeve, there is grading shield the insulating sleeve upper end, there is high-voltage connection terminal the grading shield upper end, full skirt is installed on the dry type capacitance type potential transformer in the periphery outside of insulating sleeve, comprise that also capacitor voltage divider is stacked together by plural capacity cell series connection, each capacity cell is made of the battery lead plate of solid insulation plate and its both sides, and the battery lead plate area of all capacity cells is identical in capacitor voltage divider; The tapping of extracting out on the capacitor voltage divider, earth tap and the circuit board arrangement that is used for the conversion of signals processing and amplifying connect.Solid insulation plate in the capacity cell is the middle circular slab that has round recessed, and the battery lead plate in the capacity cell is a circular slab.Between the battery lead plate of the top spring is arranged in grading shield and the capacitor voltage divider.Circuit board arrangement and capacitor voltage divider lower end are mounted in the housing.
The present invention has two big advantages.
1, capacitor voltage divider is a dry type, has avoided seepage, contaminated environment, has accomplished non-maintaining;
2, the tap of extracting from voltage divider is not to be connected on the calutron, but be connected on the circuit board arrangement of conversion of signals processing and amplifying function, so just reduce tap voltage and tap power output significantly, reduced the pole plate area and the field intensity of capacity cell, avoided ferro resonance effectively; Thereby improved the dielectric strength of voltage transformer, saved raw material, made the smaller volume of capacitor voltage divider.
Description of drawings
Fig. 1 is the cutaway view of a kind of structure of the present invention.
Fig. 2 is the front view of the solid insulation plate of a kind of structure among the present invention.
Fig. 3 is the vertical view of the solid insulation plate of a kind of structure among the present invention.
Fig. 4 is the front view of the battery lead plate of a kind of structure among the present invention.
Fig. 5 is the vertical view of the battery lead plate of a kind of structure among the present invention.
1-high-voltage connection terminal 2-grading shield
3-connecting line 4-spring
5-battery lead plate 6-solid insulation plate
7-insulating sleeve 8-full skirt
9-housing 10-tapping
11-earth tap 12-circuit board arrangement
13-measures output 14-protection output
The 15-power input
Embodiment
Below the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Embodiment one
As the solid insulation plate 6 in the capacity cell, circular groove is arranged in the middle of it with polyfluortetraethylene plate, profile is circle; Battery lead plate 5 is a circular slab, is embedded in the groove of solid insulation plate 6, and little groove face that is higher than; The composition capacitor voltage divider that will superpose one by one with the capacity cell that said method is made is put into the insulating sleeve made from epoxy resin 7, and insulating sleeve 7 inwalls and solid insulation plate 6 closely cooperate, and the gap is gel-filled with silicon.Between grading shield 2 and the top battery lead plate 5 spring 4 is arranged, compress each capacity cell by spring 4.Grading shield 2 is fastened and connected with insulating sleeve 7.High-voltage connection terminal 1 is connected the top of grading shield 2.By connecting line 3 capacity cell the top battery lead plate 5 of series connection is linked and equipotential with grading shield 2 and high-voltage connection terminal 1.The capacity cell of the series connection earth tap 11 that extracts of battery lead plate 5 bottom is connected with ground, the capacity cell that makes series connection bottom with the ground equipotential; The capacity cell of the series connection earth tap 11 of battery lead plate 5 extractions bottom inserts the circuit board arrangement 12 that is used for voltage signal conversion processing and amplifying simultaneously.From the capacity cell of series connection bottom upwards the tapping 10 extracted out of second electrode plate 5 insert the circuit board arrangement 12 that is used for voltage signal conversion processing and amplifying.Circuit board arrangement 12 has power input 15, measures output 13, protection output 14.Circuit board arrangement 12 needs shielding.Insulating sleeve 7 outer periphery are surrounded by the silicon rubber full skirt 9 that increases creep distance.The circuit board arrangement 12 that is used for voltage signal conversion processing and amplifying is mounted in the housing 9 with the capacitor voltage divider lower end.In the use, as required, extract voltage signals, behind the circuit board arrangement 12 of this signal through the conversion processing and amplifying, export to and measure display unit and protective device from certain battery lead plate of centre 5 of the capacity cell of series connection.
Embodiment two
Insulating sleeve 7 usefulness polytetrafluoroethylene are made; The circuit board arrangement 12 that is used for voltage signal conversion processing and amplifying is not mounted in the housing 9, places in the control room by prolonging the shielding on line; Other structure is with embodiment one.
Claims (5)
1. dry type capacitance type potential transformer, comprise that capacitor voltage divider is installed in the insulating sleeve (7), there is grading shield (2) insulating sleeve (7) upper end, there is high-voltage connection terminal (1) grading shield (2) upper end, full skirt (9) is installed on the periphery outside of insulating sleeve (7), it is characterized in that capacitor voltage divider is stacked together by two above identical in structure capacity cell series connection, each capacity cell is made of the battery lead plate (5) of solid insulation plate (6) and its both sides, and the battery lead plate of all capacity cells (5) area is identical in capacitor voltage divider; The tapping of extracting out on the capacitor voltage divider (10), earth tap (11) connect with the circuit board arrangement that is used for the conversion of signals processing and amplifying (12).
2. according to the said dry type capacitance type potential transformer of claim 1, it is characterized in that the solid insulation plate (6) in the capacity cell is the middle circular slab that has round recessed.
3. according to the said dry type capacitance type potential transformer of claim 1, it is characterized in that the battery lead plate (5) in the capacity cell is a circular slab.
4. according to the said dry type capacitance type potential transformer of claim 1, it is characterized in that in grading shield (2) and the capacitor voltage divider between the battery lead plate (5) topmost spring (4) being arranged.
5. according to the said dry type capacitance type potential transformer of claim 1, it is characterized in that circuit board arrangement (12) and capacitor voltage divider lower end are fixed in the housing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021566062A CN1508819A (en) | 2002-12-17 | 2002-12-17 | Dry capacitor type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021566062A CN1508819A (en) | 2002-12-17 | 2002-12-17 | Dry capacitor type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1508819A true CN1508819A (en) | 2004-06-30 |
Family
ID=34236308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021566062A Pending CN1508819A (en) | 2002-12-17 | 2002-12-17 | Dry capacitor type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1508819A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819868A (en) * | 2010-05-04 | 2010-09-01 | 中国电力科学研究院 | Extra-high-voltage equal potential shielded capacitor voltage transformer |
| CN102024555A (en) * | 2009-09-21 | 2011-04-20 | 江苏思源赫兹互感器有限公司 | Electronic voltage transformer |
| CN102354598A (en) * | 2011-06-30 | 2012-02-15 | 中国西电电气股份有限公司 | Capacitive divider with medium voltage positioned at high-voltage side |
| CN102590636A (en) * | 2012-03-16 | 2012-07-18 | 辽宁省电力有限公司沈阳供电公司 | Portable double-shielding standard capacitor |
| CN102735895A (en) * | 2012-06-05 | 2012-10-17 | 平高集团有限公司 | Capacitive voltage divider |
| CN105140000A (en) * | 2015-09-25 | 2015-12-09 | 江苏思源赫兹互感器有限公司 | Capacitive voltage transformer |
| CN106872752A (en) * | 2015-12-14 | 2017-06-20 | 全球能源互联网研究院 | A kind of capacitance type potential transformer |
| CN108333470A (en) * | 2018-01-18 | 2018-07-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of induction electro-optical grid equipment voltage increases monitoring device and method suddenly |
| CN109935460A (en) * | 2017-12-15 | 2019-06-25 | 大连北方互感器集团有限公司 | A kind of capacitance type potential transformer |
-
2002
- 2002-12-17 CN CNA021566062A patent/CN1508819A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024555A (en) * | 2009-09-21 | 2011-04-20 | 江苏思源赫兹互感器有限公司 | Electronic voltage transformer |
| CN102024555B (en) * | 2009-09-21 | 2015-04-22 | 江苏思源赫兹互感器有限公司 | Electronic voltage transformer |
| CN101819868A (en) * | 2010-05-04 | 2010-09-01 | 中国电力科学研究院 | Extra-high-voltage equal potential shielded capacitor voltage transformer |
| CN102354598A (en) * | 2011-06-30 | 2012-02-15 | 中国西电电气股份有限公司 | Capacitive divider with medium voltage positioned at high-voltage side |
| CN102354598B (en) * | 2011-06-30 | 2013-04-10 | 中国西电电气股份有限公司 | Capacitive divider with medium voltage positioned at high-voltage side |
| CN102590636A (en) * | 2012-03-16 | 2012-07-18 | 辽宁省电力有限公司沈阳供电公司 | Portable double-shielding standard capacitor |
| CN102735895B (en) * | 2012-06-05 | 2013-12-11 | 平高集团有限公司 | Capacitive voltage divider |
| CN102735895A (en) * | 2012-06-05 | 2012-10-17 | 平高集团有限公司 | Capacitive voltage divider |
| CN105140000A (en) * | 2015-09-25 | 2015-12-09 | 江苏思源赫兹互感器有限公司 | Capacitive voltage transformer |
| CN106872752A (en) * | 2015-12-14 | 2017-06-20 | 全球能源互联网研究院 | A kind of capacitance type potential transformer |
| CN106872752B (en) * | 2015-12-14 | 2019-08-06 | 全球能源互联网研究院 | A kind of capacitance type potential transformer |
| CN109935460A (en) * | 2017-12-15 | 2019-06-25 | 大连北方互感器集团有限公司 | A kind of capacitance type potential transformer |
| CN108333470A (en) * | 2018-01-18 | 2018-07-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of induction electro-optical grid equipment voltage increases monitoring device and method suddenly |
| CN108333470B (en) * | 2018-01-18 | 2023-05-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Device and method for monitoring voltage steep increase of inductive electro-optical power grid equipment |
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Addressee: Wang Rixin Document name: Notice of publication of application for patent for invention |
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Addressee: Wang Rixin Document name: Deemed as a notice of withdrawal |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |