CN201540326U - Alternating current extra-high voltage shield voltage measuring device - Google Patents
Alternating current extra-high voltage shield voltage measuring device Download PDFInfo
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- CN201540326U CN201540326U CN2009202552330U CN200920255233U CN201540326U CN 201540326 U CN201540326 U CN 201540326U CN 2009202552330 U CN2009202552330 U CN 2009202552330U CN 200920255233 U CN200920255233 U CN 200920255233U CN 201540326 U CN201540326 U CN 201540326U
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- screened condenser
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Abstract
The utility model relates to an alternating current extra-high voltage shield voltage measuring device, which comprises a voltage divider, a shield capacitor, a grading shield and a low-voltage alternating current measuring meter, wherein the voltage divider is formed by connecting a high-voltage arm and a low-voltage arm in series; the shield capacitor is used for stray capacitance generated under shield high voltage; the grading shield used for restraining generation of a corona is positioned on the shield capacitor or on the top portion of voltage divider; and the low-voltage alternating current measuring meter is used for reflecting high-voltage voltage according to proportion relation. The shield capacitor surrounding the periphery of the voltage divider is connected parallelly with the voltage divider, namely a top end electrode of the voltage divider is connected with a top end electrode of the shield capacitor in equipotential manner; a grounding end of the voltage divider is connected with a grounding end of the shield capacitor in equipotential manner; the high-voltage arm of the voltage divider is electrically insulated from and not communicated with the positions of segmentations of the shield capacitor; and insulation materials are used for supporting and fixing. The voltage measuring device uses the shield capacitor for shielding the stray capacitance, and capacitance (mainly relates to the high-voltage arm) of the voltage divider is basically not influenced by the stray capacitance even in high-voltage.
Description
Technical field
The utility model relates to a kind of AC extra high voltage shielding pressure tester, the particularly measurement mechanism that can measure up to millions of volt AC extreme high voltages, satisfies in-site measurement that exchanges extreme high voltage and the requirement of setting up voltage standard.
Background technology
Up to the present, the measurement of ac high voltage and calibration concentrate in the 1000kV substantially, and the accuracy lower usually (below 1 grade) of the voltage measuring apparatus that 500kV is above, and majority can only adopt indirect calibration method, promptly only under relatively low voltage (500kV even 300kV or below the 200kV) apply voltage and directly compare, rare high voltage down directly comparison calibrate, so under the high voltage because of the influence of stray capacitance, accuracy of measurement is difficult to effective assurance.The extreme high voltage that 1000kV is above, the voltage divider of traditional structure be because of being subjected to the influence of stray capacitance, and lack easy, effective correcting device, is difficult to substantially measure accurately or calibrate.Along with the employing and the popularization of domestic extreme high voltage technology of transmission of electricity, and the more input and the startup of related electric technical research under the voltage levels, press for and can measure or calibrate the equipment that exchanges extreme high voltage accurately and efficiently.
The utility model content
The utility model purpose is to provide a kind of accurate and effective measurement or calibration the interchange extreme high voltage up to millions of volts to shield pressure tester in order to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution adopted in the utility model is: a kind of interchange extreme high voltage shielding pressure tester comprises the voltage divider, the screened condenser that is used to shield the stray capacitance that generates high voltage under that are made of high and low pressure arm series connection, is used to suppress the grading shield that is positioned at screened condenser or voltage divider top of corona generation and be used for concerning in proportion the low-voltage alternating-current meter meter that reacts high tension voltage; Described screened condenser around voltage divider around, and it is in parallel with voltage divider, this parallel connection refers to that the apex electrode of voltage divider connects with the apex electrode equipotential of screened condenser, the earth terminal of voltage divider connects with the earth terminal equipotential of screened condenser, and each merogenesis of voltage divider high-voltage arm and screened condenser to be on electric be that insulation is disconnected, use the insulating material support fixation.
Preferably, described voltage divider and screened condenser are at the arbitrary essentially identical height of vertical direction place, and the two ratio to the electric capacity of earth terminal is a constant substantially, and at arbitrary height place, voltage divider is under the equivalent potential screen state of its peripheral screened condenser.
Preferably, described interchange extreme high voltage shielding pressure tester also is provided with the merogenesis place, described merogenesis place operated by rotary motion finished product sustained height place after installation, and in the two insulation of merogenesis place, described merogenesis place also is provided with grading shield, and described grading shield only connects with screened condenser.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage:
This pressure tester utilizes screened condenser to mask stray capacitance, voltage divider electric capacity (mainly being high-voltage arm) is not even be subjected to the influence of stray capacitance substantially yet under high voltage, thereby as long as guarantee the linearity of voltage divider body and low pressure measurement table meter, just can guarantee the system linearity degree, therefore this measuring system is as long as directly comparison calibration under relatively low voltage just can guarantee the accuracy of under high pressure measuring.So this measuring system not only can be used for measuring accurately the interchange extreme high voltage, even can be used for setting up the higher voltage standard with lower voltage standard, and then the calibration operation of being correlated with.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Accompanying drawing 1: the front view that shields the preferred embodiment of pressure tester for a kind of AC extra high voltage of the present utility model;
Accompanying drawing 2: be the vertical view of the merogenesis junction of accompanying drawing 1;
Wherein: 1, voltage divider (high-voltage arm); 2, screened condenser; 3, top grading shield; 4, middle part grading shield; 5, insulator foot; 6, base for supporting strut; 7, insulation steady brace; 8, base for supporting metal base plate; 9, screened condenser fixed connecting piece (metal); 10, insulating fixing piece.
Embodiment
The synoptic diagram of a kind of scheme of implementing for the utility model as shown in Figures 1 and 2, the promptly overall two merogenesis forms that adopt, if the scheme of four set of shield capacitor arrangements, its main body constitutes by capacitive divider 1 and screened condenser 2 are in parallel, after on the insulator foot 5 bottom being installed in together, be fixed in jointly together with insulator foot 5 on the base for supporting that mainly constitutes by strut 6 and metal base plate 8 etc. of bottom, top high-voltage and middle part merogenesis place are provided with top grading shield 3 and corresponding middle part grading shield, and other is provided with insulation steady brace 7 and thinks reinforcement fixed effect and whole rigidity.
Screened condenser 2 evenly distributes around voltage divider 1.The screened condenser that right quantity can be set according to the actual requirements and is not limited to illustrate 4 groups of quantity evenly around voltage divider 1.The diagram screened condenser is that vertical direction is placed, and is parallel with the voltage divider body, also can be adopted as other structure or the mode screened condenser that distributes, as evenly spiral around etc. mode, but purpose is consistent, promptly evenly around the periphery of voltage divider.
Screened condenser 2 is in parallel with voltage divider 1, the apex electrode (being high-pressure side) that only limits to top high-voltage punishment depressor connects with the apex electrode equipotential of screened condenser, and connect with top grading shield 3, and the earth terminal of voltage divider (being the lower end of voltage divider low-voltage arm capacitor) connects with the earth terminal equipotential of screened condenser.
Merogenesis place, middle part is equipped with corresponding middle part grading shield 4.The voltage divider partial node need be connected and fixed by insulating fixing piece 10 and screened condenser fixed connecting piece (metal) 9, screened condenser 2 is all realized installing and fixing and being connected and fixed between the joint up and down in the single-units by metal fixed connecting piece 9 at the merogenesis place, simultaneously the middle part grading shield 4 at this screened condenser metal fixed connecting piece 9 and this merogenesis place electric together with, realize all pressing shielding action, and the grading shield 4 at this place is not to be communicated with the voltage divider partial node that occupy its center.
The measuring system of the interchange extreme high voltage of implementing according to the utility model can adopt more merogenesis or ameristic structure according to tested electric pressure and mounting condition.Higher as electric pressure, the then corresponding increasing of overall height, for strengthening fixed effect and whole rigidity, need to adopt insulation steady brace 7, except the top to the bottom support base strut 6, when overall height is big, even merogenesis place in middle part also needs bottom support base strut 6 is provided with insulation steady brace 7.
The voltage divider in the interchange extreme high voltage measuring system of being implemented according to the present invention and the electric capacity of screened condenser, mainly the accuracy requirement by tested electric pressure and measurement determines.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage:
This pressure tester utilizes screened condenser to mask stray capacitance, voltage divider electric capacity (mainly being high-voltage arm) is not even be subjected to the influence of stray capacitance substantially yet under high voltage, thereby as long as guarantee the linearity of voltage divider body and low pressure measurement table meter, just can guarantee the system linearity degree, therefore this measuring system is as long as directly comparison calibration under relatively low voltage just can guarantee the accuracy of under high pressure measuring.So this measuring system not only can be used for measuring accurately the interchange extreme high voltage, even can be used for setting up the higher voltage standard with lower voltage standard, and then the calibration operation of being correlated with.
Below only be concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, or any to move mode dull and stereotyped described in the utility model, all drop within the utility model rights protection scope.
Claims (2)
1. AC extra high voltage shielding pressure tester is characterized in that: comprise the voltage divider, the screened condenser that is used to shield the stray capacitance that generates high voltage under that are made of high and low pressure arm series connection, be used to suppress the grading shield that is positioned at screened condenser or voltage divider top and merogenesis place of corona generation and be used for concerning in proportion the low-voltage alternating-current meter meter that reacts high tension voltage; Described screened condenser around voltage divider around, and it is in parallel with voltage divider, this parallel connection refers to that the apex electrode of voltage divider connects with the apex electrode equipotential of screened condenser, the earth terminal of voltage divider connects with the earth terminal equipotential of screened condenser, and each merogenesis of voltage divider high-voltage arm and screened condenser to be on electric be that insulation is disconnected, use the insulating material support fixation; Also be provided with the merogenesis place, described merogenesis place operated by rotary motion finished product sustained height place after installation, and in the two insulation of merogenesis place, described merogenesis place also is provided with grading shield, and described grading shield only connects with screened condenser.
2. AC extra high voltage shielding pressure tester according to claim 1, it is characterized in that: described voltage divider and screened condenser are at the arbitrary essentially identical height of vertical direction place, the two ratio to the electric capacity of earth terminal is a constant substantially, at arbitrary height place, voltage divider is under the equivalent potential screen state of its peripheral screened condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202552330U CN201540326U (en) | 2009-11-20 | 2009-11-20 | Alternating current extra-high voltage shield voltage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202552330U CN201540326U (en) | 2009-11-20 | 2009-11-20 | Alternating current extra-high voltage shield voltage measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540326U true CN201540326U (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202552330U Expired - Lifetime CN201540326U (en) | 2009-11-20 | 2009-11-20 | Alternating current extra-high voltage shield voltage measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540326U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513081A (en) * | 2012-10-15 | 2014-01-15 | 上海市计量测试技术研究院 | High-precision rapid-responding electric resistor type impulse voltage divider |
| CN104459262A (en) * | 2014-12-04 | 2015-03-25 | 中国西电电气股份有限公司 | High-voltage measuring resistance voltage divider |
-
2009
- 2009-11-20 CN CN2009202552330U patent/CN201540326U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513081A (en) * | 2012-10-15 | 2014-01-15 | 上海市计量测试技术研究院 | High-precision rapid-responding electric resistor type impulse voltage divider |
| CN103513081B (en) * | 2012-10-15 | 2016-05-18 | 上海市计量测试技术研究院 | A kind of resistor-type impulse voltage divider of high accuracy fast-response |
| CN104459262A (en) * | 2014-12-04 | 2015-03-25 | 中国西电电气股份有限公司 | High-voltage measuring resistance voltage divider |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SUZHOU HUADIAN ELECTRIC CO., LTD. Free format text: FORMER NAME: SUZHOU HUADIAN ELECTRIC TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee after: Suzhou Huadian Electric Co., Ltd. Address before: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee before: Suzhou Huadian Electric Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100804 |