CN101566640B - Electronic voltage transducer - Google Patents
Electronic voltage transducer Download PDFInfo
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- CN101566640B CN101566640B CN2009100625079A CN200910062507A CN101566640B CN 101566640 B CN101566640 B CN 101566640B CN 2009100625079 A CN2009100625079 A CN 2009100625079A CN 200910062507 A CN200910062507 A CN 200910062507A CN 101566640 B CN101566640 B CN 101566640B
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- flexible printed
- printed circuit
- circuit board
- side flexible
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Abstract
The invention discloses an electronic voltage transducer which comprises a high voltage electriferous stick, wherein the upper end of the high voltage electriferous stick is provided with a bus connector and the lower end thereof is a base seat. An insulation cylinder made from a solid insulation material is sheathed outside the high voltage electriferous stick and is externally adhered with a double-side flexible printed circuit board, on which a signal processing circuit is arranged. Copper moulds at the inner layer and the outer layer of the double-side flexible printed circuit board are connected by a precision resistor and the copper mould at the outer layer of the double-side flexible printed circuit board is further connected electrically. The transducer has simple structure and is applicable to industrialized mass production; with the adoption of the double-side flexible printed circuit board, a signal modulation circuit can be arranged inside the transducer and the signal-to-noise ratio of the transducer can be improved; the voltage transducer is particularly applicable to an electric power system with poor electromagnetic environment; and the precision resistor and the signal modulation circuit are arranged at a layout board at the outer layer of the double-side flexible printed circuit board, thus being capable of effectively reducing lead errors, increasing the signal-to-noise ratio of a system and improving measurement accuracy.
Description
Technical field
The present invention relates to a kind of electronic type voltage transformer, be specifically related to the voltage transformation of a kind of 35kV of being applicable to and the following electric system of 35kV, for measuring and protected location provides the electronic voltage transducer of secondary voltage signal.
Background technology
Voltage transformer (VT) is the visual plant that carries out voltage measurement in the electric system and obtain relay protection signal, and the security and the economical operation of its precision and reliability and electric system are closely related.For a long time, traditional induction voltage transformer (VT) dominate always in relay protection and voltage measurement.But it is low that induction voltage transformer (VT) has measuring accuracy, and volume is big, the cost height, and the insulation system complexity is prone to shortcomings such as ferroresonance.And electronic mutual inductor has the measuring accuracy height, bandwidth, and dynamic range is big, compact conformation, antijamming capability is strong, is convenient to and computer interface, satisfies Automation of Electric Systems and digitizing requirement, is particularly suitable for advantages such as digital transformer substation needs.
As the sensor of electronic type voltage transformer core, obtain the difference of aspect according to it, can be divided into optical crystal type, electric resistance partial pressure type and capacitance partial pressure type.Optical crystal type sensor is subject to the influence of environment temperature, so its structure and signal processing circuit more complicated; Electric resistance partial pressure type sensor adopts two resistance that one sub-high pressure is carried out dividing potential drop, obtains secondary low-voltage, so its high-voltage arm side needs the resistance that resistance is very high, and also very big of the high resistance error of resistance influences its measuring accuracy; For capacitance partial pressure type sensor, traditional method be adopt the power capacitor dividing potential drop or with gas as insulating material, so its complex structure, volume is big, use and operation expense height.
Summary of the invention
The objective of the invention is to divide the die mould sensor, overcome the deficiency of existing induction voltage transformer (VT) and traditional electrical minor voltage transformer (VT), for electric system provides safe and reliable voltage signal for electronic type voltage transformer provides a kind of novel capacitor.
The object of the present invention is achieved like this: a kind of electronic voltage transducer, comprise the high pressure zone torch, high pressure zone torch upper end is provided with busbar joint, the lower end is a pedestal, at high pressure zone torch overcoat the insulating concrete cylinder of being made by solid insulating material is housed, insulating concrete cylinder posts double-side flexible printed circuit board outward, double-side flexible printed circuit board is provided with signal processing circuit, the internal layer of double-side flexible printed circuit board is connected by precision resistance with outer copper mold, and the outer copper mold of double-side flexible printed circuit board with electrically link to each other.
Precision resistance and signal processing circuit are at the outer fabric swatch of double-side flexible printed circuit board.
Electronic voltage transducer provided by the invention, it is simple in structure, is fit to industrial mass manufacture; The employing double-side flexible printed circuit board can be placed on signal conditioning circuit the inside of sensor, can improve the signal to noise ratio (S/N ratio) of sensor; Be particularly suitable for using in the abominable electric system of electromagnetic environment; Precision resistance, signal conditioning circuit can effectively reduce the lead-in wire error at the outer fabric swatch of double-side flexible printed circuit board, have increased the signal to noise ratio (S/N ratio) of system, have improved measuring accuracy.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of electronic voltage transducer, comprise high pressure zone torch 2, high pressure zone torch 2 upper ends are provided with busbar joint 1, the lower end is a pedestal 8, outside high pressure zone torch 2, be set with the insulating concrete cylinder of making by solid insulating material 4, the insulating concrete cylinder 4 outer double-side flexible printed circuit boards 6 that post, double-side flexible printed circuit board 6 is provided with signal processing circuit 7, the internal layer of double-side flexible printed circuit board 6 is connected by precision resistance 5 with outer copper mold, and the outer copper mold of double-side flexible printed circuit board 6 with electrically link to each other.
Principle of work of the present invention is to utilize equivalent capacity to form voltage-dividing capacitor, to a sub-high pressure dividing potential drop, obtains secondary low-voltage, after the secondary low-voltage signal is handled with signal conditioning circuit 7, through 9 outputs of output interface terminal.Wherein, the copper mold equivalence of the top layer of high pressure zone torch 2, insulating concrete cylinder 4 and double-side flexible printed circuit board 6 internal layers is a high-voltage arm electric capacity, wherein, the copper mold equivalence of charged rod surface and double-side flexible printed circuit board 6 internal layers is two pole plates, and insulating concrete cylinder 4 equivalences are dielectric; Double-side flexible printed circuit board 6 equivalences are low-voltage arm electric capacity, and wherein double-side flexible printed circuit board 6 inside and outside two-layer copper mold equivalences are two pole plates, and the equivalence of the substrate of double-side flexible printed circuit board 6 is a dielectric.Because the thickness of insulating concrete cylinder 4 will be much larger than the thickness of double-side flexible printed circuit board 6, computing formula according to the cylindrical shape capacitor, the electric capacity of high-voltage arm will be much smaller than the electric capacity of low-voltage arm, therefore most of voltage drop obtains the secondary low-voltage signal at low-voltage arm electric capacity two ends like this in high-voltage arm electric capacity both sides.Like this, after overvoltage sensor is handled, export, finish voltage signal acquisition work from output interface 9 via the voltage signal that busbar joint 1 collects.
For improving transient response, improve measuring accuracy, at low-voltage capacitance arm two ends, inside and outside precision resistance 5 in parallel between two-layer of double-side flexible printed circuit board 6 just.Like this under the power frequency condition, secondary singal and a signal are not simple dividing potential drop relations, and secondary singal is the differential of a signal, and secondary singal is amplified, can be restored signal one time after the processing such as integration, phase shift.
Claims (2)
1. electronic voltage transducer, comprise high pressure zone torch (2), high pressure zone torch (2) upper end is provided with busbar joint (1), the lower end is pedestal (8), it is characterized in that: outside high pressure zone torch (2), be set with the insulating concrete cylinder of making by solid insulating material (4), the outer double-side flexible printed circuit board (6) that posts of insulating concrete cylinder (4), double-side flexible printed circuit board (6) is provided with signal processing circuit (7), the internal layer of double-side flexible printed circuit board (6) is connected by precision resistance (5) with outer copper mold, and the outer copper mold of double-side flexible printed circuit board (6) with electrically link to each other, the top layer of high pressure zone torch (2), the copper mold equivalence of insulating concrete cylinder (4) and double-side flexible printed circuit board (6) internal layer is a high-voltage arm electric capacity, wherein, the copper mold equivalence of high pressure zone torch (2) surface and double-side flexible printed circuit board (6) internal layer is two pole plates, and insulating concrete cylinder (4) equivalence is a dielectric; Double-side flexible printed circuit board (6) equivalence is a low-voltage arm electric capacity, wherein the inside and outside two-layer copper mold equivalence of double-side flexible printed circuit board (6) is two pole plates, and the equivalence of the substrate of double-side flexible printed circuit board (6) is a dielectric, and the thickness of insulating concrete cylinder (4) will be much larger than the thickness of double-side flexible printed circuit board (6).
2. a kind of electronic voltage transducer according to claim 1 is characterized in that: precision resistance (5) and signal processing circuit (7) are at the outer fabric swatch of double-side flexible printed circuit board (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100625079A CN101566640B (en) | 2009-06-09 | 2009-06-09 | Electronic voltage transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100625079A CN101566640B (en) | 2009-06-09 | 2009-06-09 | Electronic voltage transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101566640A CN101566640A (en) | 2009-10-28 |
| CN101566640B true CN101566640B (en) | 2011-05-18 |
Family
ID=41282899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100625079A Expired - Fee Related CN101566640B (en) | 2009-06-09 | 2009-06-09 | Electronic voltage transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101566640B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901258A (en) * | 2014-04-09 | 2014-07-02 | 福建鑫恒源智能电气有限公司 | Supporting insulator type high voltage induction sensor |
| 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 |
| EP3298417A1 (en) * | 2015-05-18 | 2018-03-28 | 3M Innovative Properties Company | Voltage sensor |
| CN110244110A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of voltage sensor control module that more ratios are adjusted |
| CN112768887B (en) * | 2020-12-22 | 2022-09-30 | 中国船舶集团有限公司第七一一研究所 | Antenna for wireless sensor of motion mechanism and wireless sensor with antenna |
-
2009
- 2009-06-09 CN CN2009100625079A patent/CN101566640B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101566640A (en) | 2009-10-28 |
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| 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yichang Navigation Instrument Co., Ltd. Assignor: China Three Gorges University Contract record no.: 2012420000080 Denomination of invention: Electronic voltage transducer Granted publication date: 20110518 License type: Exclusive License Open date: 20091028 Record date: 20120702 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20140609 |
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| EXPY | Termination of patent right or utility model |