CN202794297U - Photoelectric current transformer - Google Patents
Photoelectric current transformer Download PDFInfo
- Publication number
- CN202794297U CN202794297U CN 201220341488 CN201220341488U CN202794297U CN 202794297 U CN202794297 U CN 202794297U CN 201220341488 CN201220341488 CN 201220341488 CN 201220341488 U CN201220341488 U CN 201220341488U CN 202794297 U CN202794297 U CN 202794297U
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- CN
- China
- Prior art keywords
- modulator
- pressure section
- current transformer
- photoelectric current
- optical fiber
- 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.)
- Expired - Fee Related
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Abstract
Provided is a photoelectric current transformer, which is composed of a high voltage part and a low voltage part. The high voltage part comprises a current sampler sleeved on a high voltage bus and a modulator for receiving signals of the current sampler. The modulator is a thin-film resistor, wherein the surface of the thin-film resistor is coated with a fluorescent material. The modulator is connected to a demodulation device of the low voltage part through an optical fiber. The photoelectric current transformer does not require a DC power supply at a high voltage side, has high reliability, does not employ polarized light, will not be affected by optical fiber birefringence, and is high in measurement precision.
Description
Technical field
The utility model relates to the power system measuring field, is specially a kind of photoelectric current inductor.
Background technology
More and more high along with the electric pressure of electrical power transmission system, capacity is increasing, traditional electromagnetic current transducer manifests its limitation gradually, such as the insulating requirements that can not satisfy extra-high tension unit, can not accurately reflect the transient process of line fault electric current etc.In order effectively to address these problems, the For The Rogowski Optical Current Transformer take photoelectric technology as the basis causes people's close attention gradually, and has obtained certain achievement.
For The Rogowski Optical Current Transformer mainly is divided into passive light current transformer and Active Optical-electronic Current Transformer.Active Optical-electronic Current Transformer needs direct supply in the high-pressure side, has reduced the reliability of mutual inductor; The passive light current transformer also has the types such as full fiber type and block glass ring, and being measuring accuracy, the major defect of full fiber type affected by fiber birefringence, do not reach the requirement of metering, then there is the long-time running poor stability in the ring-like current transformer of block glass and the high shortcoming of faking.
The utility model content
The technical matters that the utility model solves is to provide a kind of photoelectric current inductor, to solve the shortcoming in the above-mentioned background technology.
The technical matters that the utility model solves realizes by the following technical solutions:
A kind of photoelectric current inductor is comprised of high-pressure section and low-pressure section, and described high-pressure section comprises the current sampler that is enclosed within on the high voltage bus, the modulator that receives described current sampler signal.Described modulator is the surperficial sheet resistance that scribbles fluorescent material, and described modulator is connected to the demodulating equipment of described low-pressure section by optical fiber; Described demodulating equipment is the optical fiber temperature-measurement device, and described demodulating equipment also is connected with interface circuit.Described current sampler be one from the Luo-coil of integration.
Beneficial effect
The utility model high-pressure side does not need direct supply, and reliability is high, does not adopt polarized light, is not subjected to the impact of fiber birefringence, and measuring accuracy is high.
Description of drawings
Fig. 1 is a kind of theory diagram of photoelectric current inductor.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, a kind of theory diagram of photoelectric current inductor, a kind of photoelectric current inductor is comprised of high-pressure section and low-pressure section, and described high-pressure section comprises the current sampler 1 that is enclosed within on the high voltage bus, the modulator 2 that receives described current sampler signal.Described modulator 2 is the surperficial sheet resistance that scribbles fluorescent material, and described modulator 2 is connected to the demodulating equipment 3 of described low-pressure section by optical fiber; Described demodulating equipment 3 is the optical fiber temperature-measurement device, and described demodulating equipment 3 also is connected with interface circuit 4.Described current sampler 1 be one from the Luo-coil of integration.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. photoelectric current inductor, formed by high-pressure section and low-pressure section, described high-pressure section comprises the current sampler that is enclosed within on the high voltage bus, the modulator that receives described current sampler signal, it is characterized in that, described modulator is the surperficial sheet resistance that scribbles fluorescent material, and described modulator is connected to the demodulating equipment of described low-pressure section by optical fiber; Described demodulating equipment is the optical fiber temperature-measurement device, and described demodulating equipment also is connected with interface circuit.
2. a kind of photoelectric current inductor according to claim 1 is characterized in that, described current sampler be one from the Luo-coil of integration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341488 CN202794297U (en) | 2012-07-16 | 2012-07-16 | Photoelectric current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341488 CN202794297U (en) | 2012-07-16 | 2012-07-16 | Photoelectric current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794297U true CN202794297U (en) | 2013-03-13 |
Family
ID=47821539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220341488 Expired - Fee Related CN202794297U (en) | 2012-07-16 | 2012-07-16 | Photoelectric current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794297U (en) |
-
2012
- 2012-07-16 CN CN 201220341488 patent/CN202794297U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20150716 |
|
| EXPY | Termination of patent right or utility model |