CN2689243Y - Electronic voltage sensor with double shielding electode - Google Patents
Electronic voltage sensor with double shielding electode Download PDFInfo
- Publication number
- CN2689243Y CN2689243Y CN 200420041803 CN200420041803U CN2689243Y CN 2689243 Y CN2689243 Y CN 2689243Y CN 200420041803 CN200420041803 CN 200420041803 CN 200420041803 U CN200420041803 U CN 200420041803U CN 2689243 Y CN2689243 Y CN 2689243Y
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- China
- Prior art keywords
- voltage
- voltage arm
- low
- electronic
- arm resistance
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Abstract
The utility model discloses a sensor which is an electronic voltage sensor with double shielding electrode suitable for linearly changing primary side high voltage in an electric power system into secondary side low voltage for measurement and protection. The high-voltage end of a high-voltage arm resistor is connected with a bus line, the lower end of the high-voltage arm resistor is connected with a low-voltage arm resistor, the high-voltage arm resistor and the low-voltage arm resistor are respectively provided with shielding electrodes, and the secondary output ends of the high-voltage arm resistor and the low-voltage arm resistor are adopted with double shielding cables connected with a unit for protecting, measuring and adjusting an electronic circuit. The unit for protecting, measuring and adjusting an electronic circuit is composed of an output circuit, a protection unit and a precision adjusting unit which are connected in turn. The output circuit is an impedance converter circuit composed of amplifiers. The electronic voltage sensor with double shielding electrode can improve the distribution of the stable electric field of a resistance divider, the distribution of voltage along resistance can be improved, phase error can be compensated, frequency characteristics can be improved, and interference rejection capability is enhanced.
Description
Technical field
The utility model relates to a kind of sensor, and particularly a kind of being applicable in the electric system is transformed to the secondary side low-voltage with the primary side high voltage linearly, and as the electronic voltage transducer of measuring and protect the band double shielding electode of usefulness.
Background technology
In electric system; electromagnetic potential transformer is mostly adopted in the measurement of voltage and protection; the problem that this mutual inductor exists is that volume is big, Heavy Weight, have ferromagnet; frequency band is very narrow; secondary singal wave form distortion when easily saturated and saturated; measuring error is big, causes the misoperation of protective relaying device then, also potential safety hazard can take place when serious.At present, along with the continuous development of electric system, the continuous increase of power capacity and electric system develop to networking, robotization and digitizing direction, and the required input signal of secondary device significantly reduces, therefore, this traditional electromagnetic potential transformer is difficult to satisfy technical requirement.
The utility model content
But the purpose of this utility model is to provide a kind of can improve antijamming capability, can improve voltage along the distribution of resistance, the also electronic voltage transducer of the band double shielding electode of compensation of phase error again.
The technical solution of the utility model is achieved in that and comprises: adjustment unit is measured in high-voltage arm resistance, secondary low-voltage arm resistance, high-tension shielding electrode pad, low pressure guarded electrode pole plate, an electronic circuit protection; its improvements are: the high-pressure side of high-voltage arm resistance is connected on the bus; lower end at high-voltage arm resistance connects low-voltage arm resistance; guarded electrode is housed respectively on high-voltage arm resistance and low-voltage arm resistance, protects the measurement adjustment unit to be connected at the secondary output terminal employing screened cable and the electronic circuit of high-voltage arm resistance and low-voltage arm resistance.
It is to be connected in sequence by output circuit, protected location and accuracy adjustment unit that adjustment unit is measured in described electronic circuit protection.
The impedance inverter circuit that output circuit is made up of amplifier.
Protected location is the excess voltage protection that is composed in parallel by Transient Suppression Diode and thermistor.
The adjustment circuit that the accuracy adjustment unit is made up of resistance and amplifier.
The utility model both can improve the distribution of the steady-state field of resitstance voltage divider owing to adopt the high-tension shielding electrode and the resitstance voltage divider of low pressure guarded electrode, can improve voltage again along distribution of resistance, but also compensation of phase error is improved its frequency characteristic; Adopt double shield transmission dividing potential drop sampled signal, improve antijamming capability; Low-pressure side is provided with the accuracy regulon, and the accuracy of sensor still can be adjusted behind the primary insulation casting complete easily, thereby guarantees the accuracy of voltage divider intrinsic standoff ratio and the compensation of phase error; At secondary side, be provided with impedance conversion unit, overvoltage protection unit, reach the accuracy adjustment unit; The impedance conversion unit can solve the output coupling, and the two protected locations of superpotential can absorb fast transient voltage, and also may command secondary output area is protected subsequent conditioning circuit, and the accuracy adjustment unit both can be adjusted accuracy, also can adjust output numerical value.
Description of drawings
Accompanying drawing is circuit theory diagrams of the present utility model.
Embodiment
Accompanying drawing is a specific embodiment of the utility model;
Below in conjunction with accompanying drawing content of the present utility model is described in further detail;
Shown in accompanying drawing; adjustment unit 5 is measured in high-voltage arm resistance 1, secondary low-voltage arm resistance 2, high-tension shielding electrode pad 3, low pressure guarded electrode pole plate 4, an electronic circuit protection; the high-pressure side of its high-voltage arm resistance 1 is connected on the bus; lower end at high-voltage arm resistance 1 connects low-voltage arm resistance 2; guarded electrode 3,4 is housed respectively on high-voltage arm resistance 1 and low-voltage arm resistance 2, protects measurement adjustment unit 5 to be connected at the secondary output terminal employing screened cable 6 and the electronic circuit of high-voltage arm resistance 1 and low-voltage arm resistance 2.
It is to connect protected location 8 by output circuit 7 that adjustment unit 5 is measured in described electronic circuit protection, and protected location 8 connects accuracy adjustment unit 9.
The impedance inverter circuit that output circuit 7 is made up of amplifier.
Protected location 8 is the excess voltage protections that composed in parallel by Transient Suppression Diode and thermistor.
The adjustment circuit that accuracy adjustment unit 9 is made up of resistance and amplifier.
Guarded electrode 3,4 is housed respectively on high-voltage arm resistance 1 and low-voltage arm resistance 2, its objective is for uniform electric field distributes, and make the building-out capacitor pole plate and use.Improving the frequency response of voltage divider, and reduce phase error.High-voltage arm resistance 1, high and low pressure guarded electrode 3,4, low-voltage arm resistance 2, output circuit 7, protected location 8 are cast in the epoxy insulation.In the lower end of epoxy insulation pour mass accurate adjustment unit 9 is housed also, can regulates the accuracy and the phase error of output signal easily.The low pressure sampled signal adopts the double shield transmission system, and heart yearn and inner screening are transmitted as coaxial signal, and copper mesh is adopted in inner screening, and ferromagnetic material is adopted in external shield, like this electromagnetic interference (EMI) is had good inhibitory effect.
Its course of work is: a high voltage is by high-voltage arm resistance 1 and low-voltage arm resistance 2 output secondary low-voltages; low voltage signal is sent to output loop 7 through screened cable 6; pass the signal to protected location 8 through after the impedance conversion; protected location 8 is sent to accuracy adjustment unit 9 with the signal of energy operate as normal, adopts screened cable 6 outputs through adjusted pin-point accuracy signal.
The utlity model has that volume is little, in light weight, accuracy of measurement is high, linearity wide ranges, simultaneously full The foot measurement is connected with defencive function and is easy to directly connect, do not need with digital instrumentation and electronic type comprehensive protector Want the advantages such as secondary transmitter.
Claims (5)
1; a kind of electronic voltage transducer with double shielding electode; comprise: a high-voltage arm resistance (1); secondary low-voltage arm resistance (2); high-tension shielding electrode pad (3); low pressure guarded electrode pole plate (4); adjustment unit (5) is measured in the electronic circuit protection; it is characterized in that: the high-pressure side of high-voltage arm resistance (1) is connected on the bus; lower end at high-voltage arm resistance (1) connects low-voltage arm resistance (2); on high-voltage arm resistance (1) and low-voltage arm resistance (2), guarded electrode (3 is housed respectively; 4), the secondary output terminal in high-voltage arm resistance (1) and low-voltage arm resistance (2) adopts screened cable (6) to be connected with electronic circuit protection measurement adjustment unit (5).
2, the electronic voltage transducer of band double shielding electode according to claim 1; it is characterized in that: it is to connect protected location (8) by output circuit (7) that adjustment unit (5) is measured in described electronic circuit protection, and protected location (8) connects accuracy adjustment unit (9) and forms.
3, the electronic voltage transducer of band double shielding electode according to claim 1 and 2 is characterized in that, the impedance inverter circuit that output circuit (7) is made up of amplifier.
4, the electronic voltage transducer of band double shielding electode according to claim 1 and 2 is characterized in that, protected location (8) is the excess voltage protection that is composed in parallel by Transient Suppression Diode and thermistor.
5, the electronic voltage transducer of band double shielding electode according to claim 1 and 2 is characterized in that, the adjustment circuit that accuracy adjustment unit (9) is made up of resistance and amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041803 CN2689243Y (en) | 2004-04-20 | 2004-04-20 | Electronic voltage sensor with double shielding electode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420041803 CN2689243Y (en) | 2004-04-20 | 2004-04-20 | Electronic voltage sensor with double shielding electode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2689243Y true CN2689243Y (en) | 2005-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420041803 Expired - Fee Related CN2689243Y (en) | 2004-04-20 | 2004-04-20 | Electronic voltage sensor with double shielding electode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2689243Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243264A (en) * | 2010-04-13 | 2011-11-16 | 施耐德电器工业公司 | Measurement device with an electric voltage divider |
| CN102539888A (en) * | 2012-01-18 | 2012-07-04 | 周有庆 | Direct measurement capacitance-current primary voltage sensor |
| CN102611092A (en) * | 2012-03-13 | 2012-07-25 | 福建省电力勘测设计院 | Mutation overvoltage impedance suppression device for electronic voltage transformer and application of device |
| EP2693223A1 (en) * | 2012-08-03 | 2014-02-05 | ABB Technology AG | Voltage measurement device with an insulating body |
| EP2696206A1 (en) * | 2012-08-06 | 2014-02-12 | ABB Technology AG | Medium or high voltage arrangement with cable connection terminal |
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
| CN109239439A (en) * | 2018-10-16 | 2019-01-18 | 国网江苏省电力有限公司南京供电分公司 | A kind of embedded-type electric pressure sensor |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN111812392A (en) * | 2020-06-05 | 2020-10-23 | 深圳供电局有限公司 | Overvoltage detection circuit |
| EP4071488A1 (en) * | 2021-04-08 | 2022-10-12 | ABB Schweiz AG | A low capacity interface for sensor based measurement of current and voltage in high voltage networks or electrical grids |
-
2004
- 2004-04-20 CN CN 200420041803 patent/CN2689243Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243264B (en) * | 2010-04-13 | 2016-05-11 | 施耐德电器工业公司 | With the measurement device of voltage divider |
| CN102243264A (en) * | 2010-04-13 | 2011-11-16 | 施耐德电器工业公司 | Measurement device with an electric voltage divider |
| CN102539888A (en) * | 2012-01-18 | 2012-07-04 | 周有庆 | Direct measurement capacitance-current primary voltage sensor |
| CN102611092B (en) * | 2012-03-13 | 2014-06-04 | 福建省电力勘测设计院 | Mutation overvoltage impedance suppression device for electronic voltage transformer and application of device |
| CN102611092A (en) * | 2012-03-13 | 2012-07-25 | 福建省电力勘测设计院 | Mutation overvoltage impedance suppression device for electronic voltage transformer and application of device |
| WO2014019692A1 (en) * | 2012-08-03 | 2014-02-06 | Abb Technology Ag | Voltage measurement device with an insulating body |
| EP2693223A1 (en) * | 2012-08-03 | 2014-02-05 | ABB Technology AG | Voltage measurement device with an insulating body |
| US9696345B2 (en) | 2012-08-03 | 2017-07-04 | Abb Schweiz Ag | Voltage measurement device with an insulating body |
| WO2014023402A1 (en) * | 2012-08-06 | 2014-02-13 | Abb Technology Ag | Medium or high voltage arrangement with cable connection terminal |
| EP2696206A1 (en) * | 2012-08-06 | 2014-02-12 | ABB Technology AG | Medium or high voltage arrangement with cable connection terminal |
| US9689898B2 (en) | 2012-08-06 | 2017-06-27 | Abb Schweiz Ag | Medium or high voltage arrangement with cable connection terminal |
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
| CN109239439A (en) * | 2018-10-16 | 2019-01-18 | 国网江苏省电力有限公司南京供电分公司 | A kind of embedded-type electric pressure sensor |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN111812392A (en) * | 2020-06-05 | 2020-10-23 | 深圳供电局有限公司 | Overvoltage detection circuit |
| EP4071488A1 (en) * | 2021-04-08 | 2022-10-12 | ABB Schweiz AG | A low capacity interface for sensor based measurement of current and voltage in high voltage networks or electrical grids |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050330 Termination date: 20120420 |