CN201332012Y - Electronic type combined transformer for digital transformer substation - Google Patents
Electronic type combined transformer for digital transformer substation Download PDFInfo
- Publication number
- CN201332012Y CN201332012Y CNU2009200386177U CN200920038617U CN201332012Y CN 201332012 Y CN201332012 Y CN 201332012Y CN U2009200386177 U CNU2009200386177 U CN U2009200386177U CN 200920038617 U CN200920038617 U CN 200920038617U CN 201332012 Y CN201332012 Y CN 201332012Y
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- transformer
- main body
- voltage
- current transformer
- voltage divider
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Abstract
An electronic type combined transformer for digital transformer substation is composed of a capacitive voltage divider, a transformer main body and a voltage acquiring device. On the upper part of the transformer main body, a secondary measuring level winding and a secondary protection level winding are arranged on a primary electric conductor and are encapsulated by polyurethane mixed glue, a current acquiring device is arranged above the polyurethane mixed glue, and the transmitting optical fiber arranged thereon is communicated with the capacitive voltage divider in the inner cavity of the transformer main body; the transformer main body is encapsulated by the polyurethane mixed glue; a high voltage bushing is arranged on the outermost layer; a voltage acquiring device is arranged under the transformer main body, a combiner is arranged on the right line. The utility model is connected with the high and lower voltage parts of the transformer by the optical fiber, the performance of the transformer is more stabilized, the mounting and the using are simple and convenient, all signals are transmitted by the twin twisted shield wires, which is propitious to reinforce the anti-electromagnetic interference capability.
Description
Technical field:
The utility model relates to electronic combined transformer for digitalized power station; it is applicable to 110kV digital transformer substation complex automatic system; 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, and 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.Simultaneously because therefore the application of fast development, the integrated automation of transformation stations and the power distribution automation of power industry, develops a kind of have the low energy consumption New type of current of measurement, protection and ability to communicate, the first-selected problem that the voltage combination transformer is manufacturer.
Summary of the invention:
The purpose of this utility model will provide a kind of electronic combined transformer for digitalized power station exactly.The purpose of this utility model is to realize like this, electronic combined transformer for digitalized power station, be by capacitor voltage divider, current transformer body, the voltage acquisition device is formed, and it is characterized in that: the top of current transformer body, primary conductive body are provided with secondary and measure 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 communicated with capacitor voltage divider in being arranged on the current transformer body inner chamber by the Transmission Fibers that is provided with on it; Described current transformer body is to be formed by the embedding of polyurethane epoxy glue, and outermost layer also is provided with bushing; The below of current transformer body is provided with the voltage acquisition device, and the circuit on the right is provided with combiner.
The utility model electronic combined mutual inductor current segment connects the high-low pressure part of instrument transformer by optical fiber, 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, install and use simple and convenient, the operation need not safeguard.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 utility model
1, current acquisition device, 2, secondary measures a level winding, 3, second protection level winding, 4, the polyurethane epoxy glue; 5, primary conductive body, 6, high-voltage terminal ends, 7, Transmission Fibers, 8, bushing; 9, capacitor voltage divider, 10, current transformer body, 11, the voltage acquisition device, 12, combiner.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing;
In the drawings, electronic combined transformer for digitalized power station, be by capacitor voltage divider 9, current transformer body 10, voltage acquisition device 11 is formed, and it is characterized in that: the top of current transformer body 10, primary conductive body 5 are provided with secondary and measure 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 communicated with capacitor voltage divider 9 in being arranged on current transformer body 10 inner chambers by the Transmission Fibers 7 that is provided with on it; Described current transformer body 10 is to be formed by 4 embeddings of polyurethane epoxy glue, and outermost layer also is provided with bushing 8; The below of current transformer body 10 is provided with voltage acquisition device 11, and the circuit on the right is provided with combiner 12.During concrete enforcement, the electronic combined mutual inductor current segment adopts the design principle of Rogowski coil or the little iron core of low energy consumption, and instrument transformer becomes current transformer body and digitalizer two parts to form with Transmission Fibers with the polyurethane embedding by unshakable in one's determination, 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.
The electronic combined mutual inductor voltage segment adopts the design principle of capacitor voltage divider, and instrument transformer is made up of capacitor voltage divider and digitalizer two parts.The output signal of capacitor voltage divider is converted to the output of serial digital light signal after digitalizer is handled.And adopted unique sensing arrangement, and capacitance is minimum, and ripe capacitance partial pressure technology but do not contain iron-core coil, and voltage divider adopts low pressure output, uncompensated reactance and annex, so this capacitance type potential transformer do not have ferro resonance, simple in structure.Need not to consider problems such as complicated technology and stability.
Capacitor voltage divider is the signal acquiring unit of system, by capacitor connection in series-parallel combination the electrical network high voltage is carried out dividing potential drop.Consider from two aspects: the one, capacitor voltage divider places outdoor, and variations in temperature can directly influence the voltage ratio of capacitor voltage divider on a large scale, makes its instability, thereby influences accuracy of measurement; The 2nd, the phase difference that the dividing potential drop of capacitor is introduced.Can adopt the mode of capacitor connection in series-parallel combination to come dividing potential drop, to reduce the influence of temperature to voltage ratio; On the software temperature is carried out information fusion as important parameter in the system and voltage signal, to eliminate the influence of variations in temperature to whole system.Show that by experiment the utility model instrument transformer linearity is good, accuracy satisfies 0.2 grade of requirement in-40 ℃～+ 45 ℃ temperature ranges.Become current transformer body with the polyurethane embedding, insulation system is simple, has substituted the oil or the SF6 of traditional instrument transformer with insulation fat, directly forms dry type integral body, and the instrument transformer performance is more stable, installs and uses simple and conveniently, and operation need not safeguarded.Take signal by collector from low-pressure side, enter the combiner received signal.
The utility model meets IEC60044-8:2002 and GB/T208408-2007 " electronic current mutual inductor " standard and IEC60044-7:1999 and GB/T208407-2007 " electronic type voltage transformer " standard; 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 combined transformer for digitalized power station, be by capacitor voltage divider (9), current transformer body (10), voltage acquisition device (11) is formed, it is characterized in that: the top of current transformer body (10), primary conductive body (5) is provided with secondary and measures level winding (2) and second protection level winding (3), and by polyurethane epoxy glue (4) embedding, only exposes a high-voltage terminal end (6); The top of polyurethane epoxy glue (4) is provided with current acquisition device (1), and is communicated with capacitor voltage divider (9) in being arranged on current transformer body (10) inner chamber by the Transmission Fibers (7) that is provided with on it; Described current transformer body (10) is to be formed by polyurethane epoxy glue (4) embedding, and outermost layer also is provided with bushing (8); The below of current transformer body (10) is provided with voltage acquisition device (11), and the circuit on the right is provided with combiner (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200386177U CN201332012Y (en) | 2009-01-05 | 2009-01-05 | Electronic type combined transformer for digital transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200386177U CN201332012Y (en) | 2009-01-05 | 2009-01-05 | Electronic type combined transformer for digital transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201332012Y true CN201332012Y (en) | 2009-10-21 |
Family
ID=41225394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200386177U Expired - Lifetime CN201332012Y (en) | 2009-01-05 | 2009-01-05 | Electronic type combined transformer for digital transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201332012Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770855B (en) * | 2009-01-05 | 2011-06-22 | 熊江咏 | Electronic combined transformer for digitalized power station |
| CN102707134A (en) * | 2012-06-26 | 2012-10-03 | 福州大学 | Composite power supply-based device for detecting comprehensive parameters of high voltage system on line |
| CN105158545A (en) * | 2015-09-30 | 2015-12-16 | 桂林电力电容器有限责任公司 | Composite bushing with optical fiber used for combined electronic transformer |
-
2009
- 2009-01-05 CN CNU2009200386177U patent/CN201332012Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770855B (en) * | 2009-01-05 | 2011-06-22 | 熊江咏 | Electronic combined transformer for digitalized power station |
| CN102707134A (en) * | 2012-06-26 | 2012-10-03 | 福州大学 | Composite power supply-based device for detecting comprehensive parameters of high voltage system on line |
| CN102707134B (en) * | 2012-06-26 | 2014-10-01 | 福州大学 | Composite power supply-based device for detecting comprehensive parameters of high voltage system on line |
| CN105158545A (en) * | 2015-09-30 | 2015-12-16 | 桂林电力电容器有限责任公司 | Composite bushing with optical fiber used for combined electronic transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091021 Effective date of abandoning: 20090105 |