CN101770859A - Electronic current transformer for digitalized power substation - Google Patents
Electronic current transformer for digitalized power substation Download PDFInfo
- Publication number
- CN101770859A CN101770859A CN200910028713A CN200910028713A CN101770859A CN 101770859 A CN101770859 A CN 101770859A CN 200910028713 A CN200910028713 A CN 200910028713A CN 200910028713 A CN200910028713 A CN 200910028713A CN 101770859 A CN101770859 A CN 101770859A
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- current transformer
- epoxy glue
- polyurethane epoxy
- transformer body
- current
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
An electronic current transformer for a digitalized power substation is composed of a current transformer body and a digital converter. A secondary measurement winding and a secondary protection winding are arranged on a primary conductive body above the current transformer body, and are encapsulated by polyurethane epoxy glue with only the primary high voltage outlet end exposed; a current collector is arranged above the polyurethane epoxy glue, and penetrates through the inner cavity of the current transformer to reach the lower end low-voltage side through a transmission optic fiber arranged on the current collector; and a combiner is arranged on the right side wire. The invention ensures the high voltage and low voltage parts of the current transformer to be connected with each other through the optic fiber, has simple structure, adopts insulation grease to replace oil or SF6 of traditional current transformer, ensures the performance of the current transformer to be more stable, is simple and convenient in mounting and use, and is maintenance free for operation.
Description
Technical field: the present invention relates to a kind of electronic current mutual inductor; particularly relate to and be used for the electronic current mutual inductor that the 110kV digital transformer substation is used; its output is the small voltage signal; can be directly and instrument, protective relaying device interface, thus realize metering, control, measure, the function of protection.
Background technology: along with the develop rapidly of electronic technology; microcomputer type relay protection and electronic electricity meter have progressively occupied leading position; in relaying protection and measuring, the energy stream and the separate from information flow of control section, thereby monitoring equipment no longer needs the instrument transformer of high power output.While, therefore, developing a kind of low energy consumption New type of current instrument transformer with measurement, protection and ability to communicate was the first-selected problem of manufacturer owing to the application of fast development, the integrated automation of transformation stations and the power distribution automation of power industry.
Summary of the invention: purpose of the present invention will provide a kind of electronic current transformer for digitalized power substation exactly.It can satisfy the needs of present electric power industry development.The object of the present invention is achieved like this, a kind of electronic current transformer for digitalized power substation, form by current transformer body and digitalizer two parts, it is characterized in that: the top of current transformer body, the primary conductive body is provided with secondary and measures level winding and second protection level winding, and, only expose the high-voltage terminal end one time by the embedding of polyurethane epoxy glue; The top of polyurethane epoxy glue is provided with the current acquisition device, and is through to the lower end low-pressure side by the Transmission Fibers that is provided with on it in the current transformer body inner chamber, and described current transformer body is to be formed by the embedding of polyurethane epoxy glue; The right circuit is provided with combiner.The present invention connects the high-low pressure part of instrument transformer by optical fiber, and insulation system is simple, has substituted the oil or the SF6 of traditional instrument transformer with insulation fat, and the instrument transformer performance is more stable, installs and uses simple and conveniently, and operation need not safeguarded.In light weight, precision is high, good linearity, measuring range are wide, shortcoming such as the frequency band that has overcome traditional electromagnetic current transducer is narrow, low-response.Can not produce high voltage during the Current Transformer Secondary open circuit, fundamentally eliminate the significant trouble hidden danger in the power system operation, farthest ensure the safety of personnel and equipment.Safe, the not danger such as inflammable, explosive that produces because of trapped fuel.Cost is low, and instant effect has realistic meaning to the transformation of existing transformer station electric equipment and the construction of raising digital transformer substation.All signals transmit by the multiple twin shielding conductor, help strengthening the ability of anti-electromagnetic interference.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
1, collector, 2, secondary measures a level winding, 3, second protection level winding, 4, the polyurethane epoxy glue, 5, the primary conductive body, 6, high-voltage terminal ends, 7, Transmission Fibers, 8, current transformer body, 9, combiner.
Embodiment: the invention will be further described below in conjunction with accompanying drawing;
In the drawings, a kind of electronic current transformer for digitalized power substation, form by current transformer body 8 and digitalizer two parts, it is characterized in that: the top of current transformer body 8, primary conductive body 5 is provided with secondary and measures level winding 2 and second protection level winding 3, and, only expose high-voltage terminal end 6 one time by 4 embeddings of polyurethane epoxy glue; The top of polyurethane epoxy glue 4 is provided with current acquisition device 1, and is through to the lower end low-pressure side by the Transmission Fibers 7 that is provided with on it in current transformer body 8 inner chambers, and described current transformer body 8 is to be formed by 4 embeddings of polyurethane epoxy glue; The right circuit is provided with combiner 9.During concrete enforcement, adopt the design principle of Rogowski coil or the little iron core of low energy consumption, instrument transformer becomes current transformer body and digitalizer two parts to form with Transmission Fibers with the polyurethane embedding by primary conductive body, winding, a secondary winding.By collector take from the high-pressure side signal by optical fiber transmission signal to low-pressure side, enter the combiner received signal.
Secondary is measured the level winding and is adopted the little ironcore choke principle of low energy consumption to be made, and second protection level winding adopts little ironcore choke principle of low energy consumption or Rogowski (Rogowski) coil principle to be made.Output meets the specified secondary output voltage of IEC60044-8:2002 and GB/T208408-2007 " electronic current mutual inductor " standard.
Adopt the electronic current mutual inductor that above principle produces can be directly and instrument, protective relaying device interface, directly supporting with the digital transformer substation complex automatic system.Thereby realize the function of metering, control, measurement, protection.
Claims (1)
1. electronic current transformer for digitalized power substation, form by current transformer body (8) and digitalizer two parts, it is characterized in that: the top of current transformer body (8), primary conductive body (5) is provided with secondary and measures level winding (2) and second protection level winding (3), and, only expose a high-voltage terminal end (6) by polyurethane epoxy glue (4) embedding; The top of polyurethane epoxy glue (4) is provided with current acquisition device (1), and is through to the lower end low-pressure side by the Transmission Fibers (7) that is provided with on it in current transformer body (8) inner chamber, and described current transformer body (8) is to be formed by polyurethane epoxy glue (4) embedding; The right circuit is provided with combiner (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910028713A CN101770859A (en) | 2009-01-05 | 2009-01-05 | Electronic current transformer for digitalized power substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910028713A CN101770859A (en) | 2009-01-05 | 2009-01-05 | Electronic current transformer for digitalized power substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101770859A true CN101770859A (en) | 2010-07-07 |
Family
ID=42503661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910028713A Pending CN101770859A (en) | 2009-01-05 | 2009-01-05 | Electronic current transformer for digitalized power substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101770859A (en) |
-
2009
- 2009-01-05 CN CN200910028713A patent/CN101770859A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100707 |