CN204882704U - Digital current transmitter of active high pressure - Google Patents
Digital current transmitter of active high pressure Download PDFInfo
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- CN204882704U CN204882704U CN201520527586.7U CN201520527586U CN204882704U CN 204882704 U CN204882704 U CN 204882704U CN 201520527586 U CN201520527586 U CN 201520527586U CN 204882704 U CN204882704 U CN 204882704U
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Abstract
The utility model discloses a digital current transmitter of active high pressure, including high voltage power supply, high voltage power supply is connected with high pressure sample coil, and the sample coil is connected with the signal sample thief, and the signal sample thief still is connected with signal amplifier, and signal amplifier still is connected with signal modulator, and signal modulator is equipped with optic fibre output port, and optic fibre output port is connected with optic fibre input port through optic fibre, and optic fibre input port sets up on the signal demodulation ware, and the signal demodulation ware still is connected with the contravariant converter. Digital current transmitter of active high pressure has avoided the battery when can send the electrorheological be the danger that current transformer can produce, simultaneously less in signal transmission, storage and processing error of mean square.
Description
Technical field
The utility model relates to a kind of current transducer, refers in particular to a kind of active high-voltage digital current transducer.
Background technology
At present, electromagnetic current transducer winding mode centered by magnetic core is manufactured, and has exposed some deadly defects in high-voltage electrical apparatus applications:
1 Insulation Problems, the air insulation that conventional electromagnetic current transformer adopts, paper oil insulation, gas-insulated and tandem insulation all can not meet electric pressure to be increased increasingly, the requirement that cabinet or installation environment are day by day compact;
2 error problems: electromagnetic current transducer iron core-closed saturated by the aperiodic component effect of electric current, magnetoconductivity plunges and error is increased in transient process;
3 magnetic cores are criticized and are shaken: the continuation caused due to the saturation of current transformer inductance, amplitude resonance overvoltage;
The iron core of 4 electromagnetic transformers, therefore range of dynamic measurement is limited;
Cause that Keep Clear-High Voltage during 5 electromagnetic transformer output terminals open circuit; Weight is large, and cost is high, easily produces interference; Not easily numeral connects, and oiliness insulation also has the risk of blast.Be difficult to the high-precision requirement meeting electric system on-line checkingi.
Utility model content
The purpose of this utility model overcomes electromagnetic current transducer poor insulativity in prior art, easily produce danger after standby time long-time, the defect that result of use is poor, a kind of good insulating is provided, security is high, the good active high-voltage digital current transducer of result of use.
The purpose of this utility model is achieved by following technical proposals:
A kind of active high-voltage digital current transducer, comprise high-voltage power supply, high-voltage power supply is connected with high-pressure sampling coil, sample coil is connected with signal sampler, and signal sampler is also connected with signal amplifier, and signal amplifier is also connected with signal modulator, signal modulator is provided with fiber-optic output mouth, fiber-optic output mouth is connected with optic fibre input end mouth by optical fiber, and optic fibre input end mouth is arranged on demodulator of PM signal PM, and demodulator of PM signal PM is also connected with inversion converter.
High-voltage power supply feed circuit are provided with in high-pressure side, high-pressure sampling coil forms sampled signal to current sample, sampled signal is after signal amplifier amplifies, by signal modulator, signal is modulated, electric signal is made to convert light signal to, light signal is by fiber-optic output port transmission to optic fibre input end mouth, and then by demodulator of PM signal PM, light signal is gone back to electric signal, electric signal exports the required signal of other equipment by inversion converter again.
The utility model has the following advantages:
1) Digital output, simplifies the interface of active high-voltage digital current transducer and secondary device, avoids the additive error of signal in transmission, storage and process, improves system reliability.
2) signal transmission by optical fiber, electromagnetism interference performance is good, ensures accuracy and the reliability of signal in strong electromagnetic environment.
3) iron-core-free, there is not magnetic saturation, ferroresonance phenomenon, the linearity is good, and insulation is simple, and range of dynamic measurement is large, bandwidth, precision are high.And volume is little, lightweight, low cost, reduces the area of transformer station.
4) secondary side low pressure is not opened a way danger.
As a kind of preferred version, signal modulator is also provided with RF output port, and RF output port is connected by RF and RF input port, and RF input port is arranged on demodulator of PM signal PM.RF signal also can complete the identical function of light signal, provides related personnel's multiple choices.
As a kind of preferred version, signal amplifier is also connected with negative-feedback circuit.Negative-feedback circuit improves the stability of system works.
The beneficial effects of the utility model are, active high-voltage digital current transducer avoids battery while sending ER effect be the danger that current transformer can produce, simultaneously less at Signal transmissions, Storage and Processing medial error.The utility model small volume, lighter in weight, cost be lower, be easy to realize.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory connection layout of the present utility model.
Wherein: 1, high-voltage power supply, 2, signal sampler, 3, signal amplifier, 4, signal modulator, 5, demodulator of PM signal PM, 6, inversion converter, 7, optical fiber, 8, RF, 9, high-pressure sampling coil.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment: a kind of active high-voltage digital current transducer, its circuit theory connection layout as shown in Figure 1, comprise high-voltage power supply 1, high-voltage power supply is connected with high-pressure sampling coil 9, sample coil is connected with signal sampler 2, signal sampler is also connected with signal amplifier 3, and signal amplifier is also connected with negative-feedback circuit.Signal amplifier is also connected with signal modulator 4, signal modulator is provided with fiber-optic output mouth and RF output port, fiber-optic output mouth is connected with optic fibre input end mouth by optical fiber 7, RF output port is connected by RF8 and RF input port, optic fibre input end mouth and RF input port are all arranged on demodulator of PM signal PM 5, and demodulator of PM signal PM is also connected with inversion converter 6.
High-voltage power supply feed circuit are provided with in high-pressure side, high-pressure sampling coil forms sampled signal to current sample, sampled signal is after signal amplifier amplifies, by signal modulator, signal is modulated, electric signal is made to convert light signal or RF signal to, light signal passes through fiber-optic output port transmission to optic fibre input end mouth, then by demodulator of PM signal PM, light signal is gone back to electric signal, RF signal transfers to RF input port by RF output port, then by demodulator of PM signal PM, RF signal is gone back to electric signal.Electric signal exports the required signal of other equipment by inversion converter again.
Claims (3)
1. an active high-voltage digital current transducer, it is characterized in that, comprise high-voltage power supply, high-voltage power supply is connected with high-pressure sampling coil, sample coil is connected with signal sampler, signal sampler is also connected with signal amplifier, signal amplifier is also connected with signal modulator, signal modulator is provided with fiber-optic output mouth, fiber-optic output mouth is connected with optic fibre input end mouth by optical fiber, optic fibre input end mouth is arranged on demodulator of PM signal PM, and demodulator of PM signal PM is also connected with inversion converter.
2. the active high-voltage digital current transducer of one according to claim 1, it is characterized in that, described signal modulator is also provided with RF output port, and RF output port is connected by RF and RF input port, and RF input port is arranged on demodulator of PM signal PM.
3. the active high-voltage digital current transducer of one according to claim 1 and 2, it is characterized in that, described signal amplifier is also connected with negative-feedback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527586.7U CN204882704U (en) | 2015-07-21 | 2015-07-21 | Digital current transmitter of active high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527586.7U CN204882704U (en) | 2015-07-21 | 2015-07-21 | Digital current transmitter of active high pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204882704U true CN204882704U (en) | 2015-12-16 |
Family
ID=54827063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520527586.7U Active CN204882704U (en) | 2015-07-21 | 2015-07-21 | Digital current transmitter of active high pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204882704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526200A (en) * | 2020-11-11 | 2021-03-19 | 西安爱科赛博电气股份有限公司 | High-precision high-dynamic isolation type voltage transmitter |
-
2015
- 2015-07-21 CN CN201520527586.7U patent/CN204882704U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526200A (en) * | 2020-11-11 | 2021-03-19 | 西安爱科赛博电气股份有限公司 | High-precision high-dynamic isolation type voltage transmitter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |