CN1412567A - Capacitive divided voltage sensor - Google Patents
Capacitive divided voltage sensor Download PDFInfo
- Publication number
- CN1412567A CN1412567A CN 01129750 CN01129750A CN1412567A CN 1412567 A CN1412567 A CN 1412567A CN 01129750 CN01129750 CN 01129750 CN 01129750 A CN01129750 A CN 01129750A CN 1412567 A CN1412567 A CN 1412567A
- Authority
- CN
- China
- Prior art keywords
- electrode
- voltage
- ground
- terminal
- interface relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011810 insulating material Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052768 actinide Inorganic materials 0.000 description 1
- 150000001255 actinides Chemical class 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The capacitive division voltage transformer relates to the electric quantity information transformation technology which is applicable to power system, specially for linearly transforming primary high voltage into secondary low voltage as information input for measurement, protection and control system in 10 kV power system. It is mainly formed from primary electrode, secondary electrode, grounding electrode, insulating material, primary terminal, secondary terminal, base plate, interface relay and metal shielding case.
Description
Technical field:
The present invention relates to a kind of capacitive divided voltage sensor; it is a kind of electric system that is applicable to; particularly in the electric system of 10kV level, the high voltage of primary side is transformed to the secondary side low-voltage linearly, as the technology of the information about power conversion of measurement, protection and the input of control system information.
Background technology:
At present, traditional power system voltage transducer, it all is the voltage sensor of iron core coil structure, these voltage sensors in high-voltage system as the advantage of information of voltage transducer, be that they have utilized electromagnetic induction principle, first and second circuit is isolated on electric, and information is by the changes of magnetic field transmission.Therefore, realize that easily the insulation of secondary side of the low-voltage of high-tension primary side is isolated, thereby secondary device and personal safety are protected.
But they also have following defective:
1, because ferromagnetic saturated, the one-shot measurement value and the secondary singal relation of mutual inductor are non-linear, for obtain one, the linear relationship of binary signal, or measurement range is very narrow; Volume and weight is increased to the degree that can't can allow for equipment, with coordinating to electromagnetic parameter season;
2, traditional mutual inductor provides information to electromagnetic meter and relay; the measurement that constitutes by electromagnetism instrument and relay; protection or control system are the passive systems of an analog quantity; it requires the information of analog quantity strong, capacity big (be generally 100V, more than the 15VA), so volume is big, Heavy Weight.But modern measurement, protection and control system are based on the digitizing active system of electronics and computer technology; it requires the information of analog input interface is weak information, low capacity; requiring dc level signal toward contact is input quantity, and therefore traditional mutual inductor is difficult to directly satisfy modern electric power secondary system requirement.And highly integrated modern electrical secondary system, also be difficult to coordinate with not only big but also heavy traditional mutual inductor.
Because the promotion of electronics and computer technology, electric system generally comes into one's own with the research of high voltage voltage sensor, and the second half year in 2000, the European ABB of transregional company releases the KEVCD combined sensor of 10kV level, its voltage sensor element adopts electric resistance partial pressure, rated voltage ratio
1 grade of precision; Device voltage sensor KEVA in the air insulation switchgear also is to adopt electric resistance partial pressure, rated voltage ratio simultaneously
1 grade of precision; At home, Xian High voltage Apparatus Research Institute belongs to the JDCZ1-10 type voltage sensor model machine that the sky, Xi'an Electric Applicance Co., Ltd released in 1999, also is to adopt electric resistance partial pressure; rated voltage 10kV; rated voltage ratio 5000/1.156V measures level class of accuracy 0.5, protected level 3P.Above-mentioned home and abroad voltage sensor all adopts the electric resistance partial pressure principle, precision is not higher than 0.5 grade, adopt electric resistance partial pressure also can cause following problem: because the high and low pressure both sides have metallic resistance directly to link to each other, if in a single day the earth terminal of high pressure cut-offs, the high voltage of primary side will appear in the secondary side of open circuit, and visible high-low pressure can not be realized effective isolation; Around the high-tension resistive is an actinoid high-voltage electric field, is an electromagnetic interference source, has increased the burden of insulation system again; Usually the radius of resistive element is very little, the increase that can make partial discharge quantity.
Summary of the invention:
The present invention aims to provide a kind of capacitive divided voltage sensor, and it can overcome the deficiencies in the prior art.
The inventor finds, is suitable for as the high voltage voltage sensor element based on the capacitance partial pressure of electro-induction principle, because the transmission medium of induction field can be an insulating medium, can realize effectively that high voltage isolates.
The present invention is achieved in that it is mainly by one-time electrode, second electrode, ground-electrode, insulating material, a terminal, the secondary terminal, base plate, interface relay and metallic shield are formed, wherein, one-time electrode, second electrode and ground-electrode wall thickness are that the metal circular tube of d is made, isolate with insulating material between them, one-time electrode mediates, second electrode is round one-time electrode, ground-electrode is enclosed within the outside of second electrode, one time terminal connects one-time electrode, the secondary terminal is arranged on the interface relay, second electrode connecting interface relay, ground-electrode connects neutral point or ground connection, the interface relay places on the base plate, and the interface relay shields with metallic shield.
The present invention can overcome the defective of conventional voltage mutual inductor, can realize effectively again that high voltage is isolated and the electromagnetic interference (EMI) of weak electric signal is shielded, compared with prior art, have precision higher (precision reaches 0.2 grade), simple in structure, advantage such as loss is less.
Below in conjunction with accompanying drawing the present invention is further described.
Description of drawings:
Fig. 1 is a structural representation of the present invention
Fig. 2 is the circuit theory diagrams of interface relay among the present invention
Embodiment:
As Fig. 1, shown in Figure 2, the present invention is mainly by one-time electrode 1, second electrode 2, ground-electrode 3, insulating material 4, a terminal A, secondary terminal 5, base plate 6, interface relay 7 and metallic shield 8 are formed, wherein, one-time electrode 1, second electrode 3 and ground-electrode 4 usefulness wall thickness are that the metal circular tube of d is made, isolate with insulating material 4 between them, one-time electrode 1 mediates, second electrode 2 is round one-time electrode 1, ground-electrode 3 is enclosed within the outside of second electrode 2, one time terminal A connects one-time electrode 1, secondary terminal 5 is arranged on the interface relay 7, second electrode 2 connecting interface relays 7, ground-electrode 3 connects neutral point or ground connection, interface relay 7 is that a voltage secondary information of being made by thick film integrated circuit amplifies and correcting circuit, place on the base plate 6, outside electromagnetic interference is isolated in 8 shieldings of interface relay 7 usefulness metallic shields effectively.Interface relay 7 also can separate independent installation.
In the present embodiment, one-time electrode 1 external radius is R
1, connecing the input high voltage from a terminal A, second electrode 2 inside radiuss are R
2, output secondary low-voltage information is to interface relay 7, and ground-electrode 3 is the metal outer cylinder, the high-voltage electric field of work can be limited within the sensing element, and electromagnetic interference (EMI) plays effective shielding action to external world.The insulating material 4 that transmits induction field between above-mentioned electrode is the epoxy resin of tolerating high voltage function admirable, realizes reliable high voltage isolation.
The external radius R of one-time electrode 1
1Should satisfy as lower inequality:
In the formula: U
S---power frequency withstand trial voltage (by national standard or ministerial standard value);
E
Max---the dielectric strength of interpolar epoxy resin.The inside radius R of second electrode 2
2, calculate by following formula:
In the formula: U
A---once import high voltage;
U
2---the secondary output voltage.The inside radius R of ground-electrode 3
0, calculate by following formula:
During work, one time terminal A connects high pressure 10kV loop, and ground-electrode 3 connecting to neutral lines, at this moment the VS1 of secondary terminal 5 will have secondary voltage output, these secondary voltages are the secondary low-voltage information with second electrode 2 outputs, obtain after 7 amplifications of interface relay and treatment for correcting, ratings is 5V or other value.Secondary voltage output will be delivered to the input interface of devices such as measurement, protection or control respectively for using.Be embedded in the device body on the base plate 6, with metallic shield 8 shieldings.
Claims (2)
1, a kind of capacitive divided voltage sensor, it is characterized in that by one-time electrode (1), second electrode (2), ground-electrode (3), insulating material (4), a terminal (A), secondary terminal (5), base plate (6), interface relay (7) and metallic shield (8) are formed, wherein, one-time electrode (1), second electrode (2) and ground-electrode (3) are made with metal circular tube, isolate with insulating material (4) between them, one-time electrode (1) mediates, second electrode (2) is round one-time electrode (1), ground-electrode (3) is enclosed within the outside of second electrode (2), a terminal (A) connects one-time electrode (1), secondary terminal (5) is arranged on the interface relay (7), second electrode (2) connecting interface relay (7), ground-electrode (3) connects neutral point or ground connection, interface relay (7) places on the base plate (6), and interface relay (7) shields with metallic shield (8).
2, a kind of capacitive divided voltage sensor according to claim 1 is characterized in that interface relay (7) is that a voltage secondary information of being made by thick film integrated circuit amplifies and correcting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011297506A CN1162709C (en) | 2001-10-15 | 2001-10-15 | Capacitive divided voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011297506A CN1162709C (en) | 2001-10-15 | 2001-10-15 | Capacitive divided voltage sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1412567A true CN1412567A (en) | 2003-04-23 |
| CN1162709C CN1162709C (en) | 2004-08-18 |
Family
ID=4669415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011297506A Expired - Fee Related CN1162709C (en) | 2001-10-15 | 2001-10-15 | Capacitive divided voltage sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162709C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912638B (en) * | 2006-08-17 | 2010-04-14 | 国网电力科学研究院 | Can type capacitor voltage mutual inductor |
| US8115473B2 (en) | 2007-04-18 | 2012-02-14 | Kabushiki Kaisha Toshiba | Optical voltage transformer |
| CN101515001B (en) * | 2009-04-07 | 2012-02-15 | 福州博峰智能电器有限公司 | Electric field induction intelligent instrument for measuring high voltage |
| CN104391161A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Electronic voltage transducer |
| CN105548659A (en) * | 2016-01-21 | 2016-05-04 | 上海固缘电力科技有限公司 | Novel AC high-voltage sensor |
-
2001
- 2001-10-15 CN CNB011297506A patent/CN1162709C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912638B (en) * | 2006-08-17 | 2010-04-14 | 国网电力科学研究院 | Can type capacitor voltage mutual inductor |
| US8115473B2 (en) | 2007-04-18 | 2012-02-14 | Kabushiki Kaisha Toshiba | Optical voltage transformer |
| CN101680918B (en) * | 2007-04-18 | 2012-08-22 | 株式会社东芝 | Optical VT device |
| CN101515001B (en) * | 2009-04-07 | 2012-02-15 | 福州博峰智能电器有限公司 | Electric field induction intelligent instrument for measuring high voltage |
| CN104391161A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Electronic voltage transducer |
| CN105548659A (en) * | 2016-01-21 | 2016-05-04 | 上海固缘电力科技有限公司 | Novel AC high-voltage sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1162709C (en) | 2004-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558440B (en) | A kind of intelligent electronic type voltage transformer | |
| CN201812667U (en) | Electronic current and voltage combined transformer | |
| CN103208360B (en) | A kind of GIS electronic current-voltage combination transformer | |
| EP1573341B1 (en) | A method and a device for voltage measurement in a high-voltage conductor | |
| CN201514849U (en) | Composite insulation compensation type electronic voltage transformer | |
| CN201812668U (en) | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) | |
| CN103208359B (en) | A kind of column support type gas-insulated electronic current-voltage combination transformer | |
| CN101256895B (en) | Novel high voltage combined independent electronic type current, voltage mutual inductor | |
| CN203218098U (en) | Electronic current-voltage combined transformer for GIS (Geographic Information System) | |
| CN101377976A (en) | Electronic voltage transformer | |
| CN1162709C (en) | Capacitive divided voltage sensor | |
| CN201311836Y (en) | Electronic voltage transformer | |
| CN201663050U (en) | Electronic combined transformer | |
| CN208367075U (en) | Individual struts formula optical current voltage combination transformer | |
| CN105826000B (en) | A kind of intelligence gas-filling cabinet punching electronic current mutual inductor | |
| CN201122169Y (en) | Electronic high voltage current mutual inductor | |
| CN201716359U (en) | Non-contact electronic type voltage sampling device | |
| CN1185495C (en) | Voltage and current combined sensor | |
| CN101901679B (en) | Concentricity-autocompensation type coaxial capacitance partial pressure electronic voltage transformer and compensation method thereof | |
| CN202093079U (en) | Electronic type voltage transformer based on coaxial differential pressure | |
| CN201449873U (en) | Automatic concentricity compensation type coaxial capacitor dividing electronic voltage transformer | |
| CN201051120Y (en) | Electronic voltage mutual inductor | |
| CN200950390Y (en) | Electromagnetic voltage potential transformer for superhigh voltage and extra-high voltage | |
| CN202307496U (en) | Electronic high-voltage current transformer | |
| CN2826782Y (en) | Protective electronic combined mutual inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN FANGDA AUTOMATION SYSTEM CO., LTD. Free format text: FORMER OWNER: FANGDA GROUP CO., LTD. Effective date: 20101102 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518000 FANGDACHENG, LONGJING, XILI, NANSHAN DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE TO: 518057 FANGDACHENG, LONGJING, XILI, NANSHAN DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101103 Address after: 526200, Fuhua Road, Dongcheng Street, Sihui City, Guangdong, China 8 Patentee after: Guangdong Sihui Instrument Transformer Works Co., Ltd. Address before: 526200 Sihui City, Guangdong, Dongcheng District Province, Guangdong Sihui transformer factory Co-patentee before: Jiang Haoxian Patentee before: Zhang Shuhua |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangdong Sihui ABB mutual inductor Co., Ltd. Assignor: Guangdong Sihui Instrument Transformer Works Co., Ltd. Contract record no.: 2011990000412 Denomination of invention: Capacitive divided voltage sensor Granted publication date: 20040818 License type: Exclusive License Open date: 20030423 Record date: 20110601 |
|
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG SIHUI ABB INSTRUMENT TRANSFORMER CO., LT Free format text: FORMER OWNER: GUANGDONG SIHUI INSTRUMENT TRANSFORMER WORKS CO., LTD. Effective date: 20130608 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130608 Address after: 526200, No. 8, Fuhua Road, Dongcheng Street, Sihui City, Guangdong Patentee after: Guangdong Sihui ABB mutual inductor Co., Ltd. Address before: 526200, Fuhua Road, Dongcheng Street, Sihui City, Guangdong province 8 Patentee before: Guangdong Sihui Instrument Transformer Works Co., Ltd. |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Guangdong Sihui ABB mutual inductor Co., Ltd. Assignor: Guangdong Sihui Instrument Transformer Works Co., Ltd. Contract record no.: 2011990000412 Date of cancellation: 20130515 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040818 Termination date: 20201015 |