CN201282017Y - Capacitor voltage transformer capable of regulating error on site - Google Patents
Capacitor voltage transformer capable of regulating error on site Download PDFInfo
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- CN201282017Y CN201282017Y CNU2008200300186U CN200820030018U CN201282017Y CN 201282017 Y CN201282017 Y CN 201282017Y CN U2008200300186 U CNU2008200300186 U CN U2008200300186U CN 200820030018 U CN200820030018 U CN 200820030018U CN 201282017 Y CN201282017 Y CN 201282017Y
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- 230000001105 regulatory effect Effects 0.000 title abstract description 26
- 239000003990 capacitor Substances 0.000 title abstract 6
- 238000004804 winding Methods 0.000 claims abstract description 101
- 238000007789 sealing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
The utility model relates to a capacitor voltage transformer, and discloses a capacitor voltage transformer capable of regulating errors on site. The capacitor voltage transformer comprises a casing, an intermediate transformer and a compensating reactor arranged in the casing, wherein, the intermediate transformer is provided with a primary main winding, a primary regulating winding and a secondary winding; and the compensating reactor is provided with a main winding and a regulating winding. The capacitor voltage transformer is characterized in that a low-voltage terminal of the main winding of the compensating reactor, a connection terminal of the regulating winding of the compensating reactor and a connection terminal of the primary regulating winding of the intermediate transformer are led out of the casing; the primary main winding of the intermediate transformer and the main winding of the compensating reactor form a main series circuit; the regulating winding of the compensating reactor and the primary regulating winding of the intermediate transformer form an auxiliary series circuit; and one end of the auxiliary series circuit is connected with the ground, and the main series circuit is connected in series between the other end of the auxiliary series circuit and a medium-voltage terminal of the capacitor voltage transformer.
Description
Technical field
The utility model relates to capacitance type potential transformer, relates in particular to a kind of capacitance type potential transformer that can on-the-spot carry out the error adjusting.
Background technology
Capacitance type potential transformer (CVT) is as transmission system voltage measurement, protective relaying device, and its accuracy has high requirements.The intermediate transformer of capacitance type potential transformer and compensation reactor all have certain number of turn regulated quantity, and it mainly is potential errors and a phase error of adjusting capacitance type potential transformer.The adjusting winding of the intermediate transformer of existing product and compensation reactor is all in electromagnetic unit inside, and product carries out error when delivery test regulates, and back sealing assembling meets the demands.
The capacitance type potential transformer of this structure has following shortcoming:
The one, product operation site error is regulated difficulty.Because the product operation is on-the-spot big with laboratory's environment difference, when perhaps secondary load need change, requires to carry out on-the-spot error and regulate.At this moment just must open the sealing of electromagnetic unit, assemble again after having debugged, the debugging cost height, and can't carry out leakage test after the assembling, leave potential safety hazard.
The 2nd, the delivery test of product need be finished accuracy test before sealing, and sealing assembling back state changes, and the wiring defective of existence may not can find that potential safety hazard removes difficulties.
Summary of the invention
The purpose of this utility model is to provide a kind of can on-the-spot carry out the capacitance type potential transformer that error is regulated, and it can user friendly field adjustable, and can eliminate because of there being the potential safety hazard of wiring defective after the product sealing.
For achieving the above object, the utility model is achieved by the following technical solutions: a kind of capacitance type potential transformer that can on-the-spot carry out the error adjusting, comprise housing, place the intermediate transformer and the compensation reactor of housing, intermediate transformer has main winding, once regulates winding and secondary winding, compensation reactor has main winding and regulates winding, it is characterized in that the once adjusting winding connection terminal of the binding post of the adjusting winding of the low-voltage terminal of the main winding of compensation reactor, compensation reactor and intermediate transformer is drawn housing; The main winding of intermediate transformer and the main winding of compensation reactor are formed main series circuit, the once adjusting winding of the adjusting winding of compensation reactor and intermediate transformer is formed auxilliary series circuit, end that should auxilliary series circuit is connected with ground, is connected in series described main series circuit between intermediate voltage terminal of the other end and capacitance type potential transformer.
The once adjusting winding of described intermediate transformer is a plurality of, and its binding post is drawn housing.
The adjusting winding of described compensation reactor is a plurality of, and its binding post is drawn housing.
The utility model is with the adjusting winding of once regulating winding and compensation reactor of intermediate transformer, be serially connected in after the main winding of main winding of intermediate transformer and compensation reactor, two kinds of electric pressures of regulating the winding connection terminal significantly reduce, passable safety is drawn housing, therefore, can change the mode of connection outside housing easily, the scene of being implemented in is carried out error and is regulated.
Description of drawings
Fig. 1 is the electrical schematic diagram of conventional CVT product;
Fig. 2 is a kind of electrical connection diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Referring to Fig. 1, conventional CVT product comprises housing, places intermediate transformer T and compensation reactor L and the high-voltage capacitance C1 and the piezoelectricity appearance C2 of housing; The common node that high-voltage capacitance C1 and middle piezoelectricity hold C2 is intermediate voltage terminal of CVT.Intermediate transformer T has main winding one time, once regulates winding B1, B2, B3 for three, and their binding post is respectively B11-B13, B21-B23, B31-B33 and three secondary winding 1a-1n, 2a-2n, da-dn.Compensation reactor L has main winding and two adjusting winding k1, k2, and their binding post is respectively k11-k13, k21-k23.The main winding of intermediate transformer T, once regulate the binding post of winding, and the main winding of compensation reactor L, regulate the binding post of winding, all be encapsulated in the housing.All terminals of intermediate transformer T secondary winding are all drawn housing.
The order that is electrically connected of whole primary circuit is the sub-A ' of intermediate voltage terminal---main winding HV Terminal of intermediate transformer, adjusting winding K2, the K1 of a main winding low-voltage terminal---is once regulated winding B3, B2, B1---compensation reactor, compensation reactor main winding HV Terminal, the terminal X terminal in main winding low-voltage terminal---primary circuit.Intermediate transformer is once regulated the selecting for use of adjusting winding of winding and compensation reactor, regulates needs according to error and decide, and after the error adjusting, above-mentioned being electrically connected is encapsulated in the housing.
With reference to Fig. 2, the adjusting winding that intermediate transformer is once regulated winding and compensation reactor all has three binding posts, and all binding posts are all drawn housing.The order that is electrically connected of whole primary circuit is the sub-A ' of intermediate voltage terminal---main winding HV Terminal of intermediate transformer, the main winding HV Terminal of a main winding low-voltage terminal---compensation reactor, the main winding low-voltage terminal is regulated winding K2, the terminal X terminal in K1---the once adjusting winding B3 of intermediate transformer, B2, B1---primary circuit.Intermediate transformer is once regulated the selecting for use of adjusting winding of winding and compensation reactor, regulates needs according to error and decides.When error is regulated, regulate being electrically connected outside housing of winding and carry out for two kinds that select for use.
Be a concrete electric connecting mode of the present utility model above, core of the present utility model is, intermediate transformer is once regulated the adjusting winding of winding and compensation reactor in once being connected, preferential near the terminal X terminal (being earth terminal) in primary circuit, and all binding posts that are connected with them are drawn housing.
In actual applications, conventional CVT product generally has two kinds of modes of connection by the position of intermediate transformer.Wherein: first kind is that intermediate transformer T is in the primary circuit earth terminal, at this moment compensation reactor is positioned at the intermediate voltage end, being electrically connected order is: the main winding HV Terminal of the sub-A ' of intermediate voltage terminal---compensation reactor, the main winding low-voltage terminal, regulate winding K2, K1---the once adjusting winding B3 of intermediate transformer, B2, B1---main winding HV Terminal of intermediate transformer, low-voltage terminal---the terminal X terminal in primary circuit.Second kind is the intermediate transformer T voltage end that mediates, at this moment compensation reactor is positioned at the primary circuit earth terminal, be electrically connected order and be the sub-A ' of intermediate voltage terminal---main winding HV Terminal of intermediate transformer, low-voltage terminal---the once adjusting winding B3 of intermediate transformer, B2, B1---adjusting winding K2, K1 of compensation reactor---the main winding HV Terminal of compensation reactor, the terminal X terminal in main winding low-voltage terminal---primary circuit.
The nominal intermediate voltage of CVT product is generally 10-20kV.Product is when normal operation, and the voltage on the compensation reactor is very little, and nearly all below 1kV, intermediate transformer holds all intermediate voltages of receptor.But product produces ferro resonance in transient process, excite 2-3 times overvoltage.Under this state, the intermediate transformer iron core is saturated, and impedance is very low, and compensation reactor need bear very high overvoltage.Therefore often at the compensation reactor two ends and protective device is arranged or air gap, with the overvoltage on the restriction compensation reactor.Nonetheless, the tolerance of the overvoltage on the compensation reactor also will reach 6-10kV.
For first kind of mode of connection, intermediate transformer T is near earth terminal, and when normally moving, its above earth potential of once regulating winding is the amplitude level of intermediate voltage, is approximately 10-20kV, will occur the overvoltage up to several times in transient process.
For second kind of mode of connection, when intermediate transformer T mediated voltage side, when normally moving, it is lower that it once regulates the winding above earth potential, generally is no more than 5% of its main winding voltage, generally below 1kV.The normal working voltage of compensation reactor is no more than 1kV, and therefore in the voltage range of normal operation (maximum 1.2 times of rated voltages), it is regulated the winding above earth potential and generally is no more than 2.5kV; But the adjusting winding above earth potential of compensation reactor is that compensation reactor bears superpotential level in transient process, can reach 6kV-10kV.
All regulate terminal all near the ground connection side in the utility model, the voltage of once regulating winding of intermediate transformer is the highest about 1kV during normal the operation, compensation reactor regulate the voltage of winding the highest can not surpass its main winding voltage 20%, promptly can not surpass 0.2kV.In transient process, intermediate transformer adjusting winding overvoltage is very little, and the overvoltage that compensation reactor is regulated winding is no more than 3 times, so all adjusting winding above earth potentials can not surpass 2kV yet, and the insulation against ground level of leading-out terminal is regulated winding and is drawn safe and reliable more than 4kV.
In the utility model, the main winding low-voltage terminal of compensation reactor, all terminal X terminals in leading-out terminal, primary circuit of adjusting winding are drawn by the insulating end daughter board.Have several to have on the insulating end daughter board and keep certain insulation distance and copper guide rod sealing, withstand voltage is not less than 4kV between each copper guide rod.The sealing of insulating end daughter board is assemblied on the housing, and the copper guide rod on the insulating end daughter board is as the terminal of each exit.
Claims (3)
1, a kind of capacitance type potential transformer that can on-the-spot carry out the error adjusting, comprise housing, place the intermediate transformer and the compensation reactor of housing, intermediate transformer has main winding, once regulates winding and secondary winding, compensation reactor has main winding and regulates winding, it is characterized in that the once adjusting winding connection terminal of the binding post of the adjusting winding of the low-voltage terminal of the main winding of compensation reactor, compensation reactor and intermediate transformer is drawn housing; The main winding of intermediate transformer and the main winding of compensation reactor are formed main series circuit, the once adjusting winding of the adjusting winding of compensation reactor and intermediate transformer is formed auxilliary series circuit, end that should auxilliary series circuit is connected with ground, is connected in series described main series circuit between intermediate voltage terminal of the other end and capacitance type potential transformer.
2, a kind of capacitance type potential transformer that can on-the-spot carry out the error adjusting according to claim 1 is characterized in that the once adjusting winding of described intermediate transformer is a plurality of, and its binding post is drawn housing.
3, a kind of capacitance type potential transformer that can on-the-spot carry out the error adjusting according to claim 1 is characterized in that the adjusting winding of described compensation reactor is a plurality of, and its binding post is drawn housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200300186U CN201282017Y (en) | 2008-08-21 | 2008-08-21 | Capacitor voltage transformer capable of regulating error on site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200300186U CN201282017Y (en) | 2008-08-21 | 2008-08-21 | Capacitor voltage transformer capable of regulating error on site |
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| Publication Number | Publication Date |
|---|---|
| CN201282017Y true CN201282017Y (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200300186U Expired - Lifetime CN201282017Y (en) | 2008-08-21 | 2008-08-21 | Capacitor voltage transformer capable of regulating error on site |
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| CN (1) | CN201282017Y (en) |
Cited By (7)
| 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 |
| CN102368431A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
| CN102368433A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | Multi-range standard voltage transformator |
| CN105510667A (en) * | 2015-12-21 | 2016-04-20 | 中国西电电气股份有限公司 | Design method of capacitance voltage transformer for multiple voltage grades |
| CN106253777A (en) * | 2016-08-15 | 2016-12-21 | 中国西电电气股份有限公司 | The method improving capacitance type potential transformer secondary output capacity |
| CN106531415A (en) * | 2016-12-28 | 2017-03-22 | 江苏思源赫兹互感器有限公司 | Electric reactance device with over voltage suppression and preparation method thereof |
| CN110488068A (en) * | 2019-08-07 | 2019-11-22 | 国网河北省电力有限公司 | A kind of sampling unit on capacitance type potential transformer |
-
2008
- 2008-08-21 CN CNU2008200300186U patent/CN201282017Y/en not_active Expired - Lifetime
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 |
| CN102368431A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
| CN102368433A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | Multi-range standard voltage transformator |
| CN102368431B (en) * | 2011-03-08 | 2013-06-19 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
| CN105510667A (en) * | 2015-12-21 | 2016-04-20 | 中国西电电气股份有限公司 | Design method of capacitance voltage transformer for multiple voltage grades |
| CN105510667B (en) * | 2015-12-21 | 2019-02-01 | 中国西电电气股份有限公司 | A kind of design method of multi-voltage grade capacitance type potential transformer |
| CN106253777A (en) * | 2016-08-15 | 2016-12-21 | 中国西电电气股份有限公司 | The method improving capacitance type potential transformer secondary output capacity |
| CN106531415A (en) * | 2016-12-28 | 2017-03-22 | 江苏思源赫兹互感器有限公司 | Electric reactance device with over voltage suppression and preparation method thereof |
| CN110488068A (en) * | 2019-08-07 | 2019-11-22 | 国网河北省电力有限公司 | A kind of sampling unit on capacitance type potential transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091218 Address after: Shaanxi city of Xi'an Province Tang Hing Road No. 7, zip code: 710075 Co-patentee after: State Grid Corporation of China Patentee after: China Electric electric Limited by Share Ltd Address before: Shaanxi city of Xi'an Province Tang Hing Road No. 7, zip code: 710075 Patentee before: China XD Electronic Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090729 |