CN101770855B - Electronic combined transformer for digitalized power station - Google Patents
Electronic combined transformer for digitalized power station Download PDFInfo
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- CN101770855B CN101770855B CN2009100287157A CN200910028715A CN101770855B CN 101770855 B CN101770855 B CN 101770855B CN 2009100287157 A CN2009100287157 A CN 2009100287157A CN 200910028715 A CN200910028715 A CN 200910028715A CN 101770855 B CN101770855 B CN 101770855B
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Abstract
An electronic combined transformer for a digitalized power station is composed of a capacitive divider, a transformer body and a voltage collector. A secondary measurement winding and a secondary protection winding are arranged are arranged on a primary conductive body above the transformer body and are encapsulated by polyurethane epoxy glue, a current collector is arranged above the polyurethane epoxy glue, the transmission optic fiber arranged on the current collector is communicated with the capacitive divider arranged in the inner cavity of the transformer body; the transformer body is encapsulated by the polyurethane epoxy and a high voltage sleeve is arranged on the outmost layer; a voltage collector is arranged under the transformer body and a combiner is arranged on the right side wire. The invention adopts the optical fiber to connect the high voltage port with the low voltage part of the transformer, has more stable performance, is simple and convenient in mounting and use, adopts twisted-pair shielding wire for transmission and facilitates reinforcing the capacity of anti-electromagnetic interference.
Description
Technical field:
The present invention relates to a kind of 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:
Purpose of the present invention will provide a kind of electronic combined transformer for digitalized power station exactly, and it can solve the existing problem of above product well.The object of the present invention is achieved like this, a kind of 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.
Electronic combined mutual inductor current segment of 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, 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 invention will be further described below in conjunction with accompanying drawing;
In the drawings, a kind of 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 instrument transformer linearity of the present invention 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 present invention 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, comprise capacitor voltage divider (9), current transformer body (10), voltage acquisition device (11), 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 polyurethane epoxy glue (4) embedding is arranged, only expose 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 go up to be provided with at current acquisition device (1); 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 |
|---|---|---|---|
| CN2009100287157A CN101770855B (en) | 2009-01-05 | 2009-01-05 | Electronic combined transformer for digitalized power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100287157A CN101770855B (en) | 2009-01-05 | 2009-01-05 | Electronic combined transformer for digitalized power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101770855A CN101770855A (en) | 2010-07-07 |
| CN101770855B true CN101770855B (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100287157A Active CN101770855B (en) | 2009-01-05 | 2009-01-05 | Electronic combined transformer for digitalized power station |
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| CN (1) | CN101770855B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393216A (en) * | 2011-08-02 | 2012-03-28 | 上官明禹 | A method of manufacturing an ultrasonic sensor |
| CN103558440B (en) * | 2013-10-22 | 2016-03-02 | 江苏靖江互感器厂有限公司 | A kind of intelligent electronic type voltage transformer |
| CN104459300A (en) * | 2014-12-23 | 2015-03-25 | 国家电网公司 | Strut type combination electronic transformer combined with disconnecting switch |
| CN104597305B (en) * | 2015-01-07 | 2017-11-14 | 马鞍山万兆科技有限公司 | A kind of optical voltage transformer and its method for packing |
| CN104977449A (en) * | 2015-07-20 | 2015-10-14 | 三峡大学 | An Optical Voltage Transformer Based on SF6 Coaxial Capacitive Voltage Divider |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2329006Y (en) * | 1998-05-09 | 1999-07-14 | 华中理工大学 | 110 kV ceramic capacitor voltage divider fiber optic voltage transformer |
| EP1624311A1 (en) * | 2004-08-06 | 2006-02-08 | Passoni & Villa Fabbrica Isolatori e Condensatori S.p.A. | Combined current and voltage measurement transformer of the capacitor bushing type |
| CN201146102Y (en) * | 2007-10-25 | 2008-11-05 | 河南省电力公司郑州供电公司 | Electronic type current transformer |
| CN201332012Y (en) * | 2009-01-05 | 2009-10-21 | 熊江咏 | Electronic type combined transformer for digital transformer substation |
-
2009
- 2009-01-05 CN CN2009100287157A patent/CN101770855B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2329006Y (en) * | 1998-05-09 | 1999-07-14 | 华中理工大学 | 110 kV ceramic capacitor voltage divider fiber optic voltage transformer |
| EP1624311A1 (en) * | 2004-08-06 | 2006-02-08 | Passoni & Villa Fabbrica Isolatori e Condensatori S.p.A. | Combined current and voltage measurement transformer of the capacitor bushing type |
| CN201146102Y (en) * | 2007-10-25 | 2008-11-05 | 河南省电力公司郑州供电公司 | Electronic type current transformer |
| CN201332012Y (en) * | 2009-01-05 | 2009-10-21 | 熊江咏 | Electronic type combined transformer for digital transformer substation |
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|---|---|
| CN101770855A (en) | 2010-07-07 |
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Effective date of registration: 20160810 Address after: 214500 No. 23, Ping Road, west of Jiangsu, Jingjiang, Zhenjiang Patentee after: Jingjiang Jiangsu mutual inductor Limited by Share Ltd Address before: 214500 Jiangsu Zhenjiang Jingjiang Ping Lu 8 Jiangsu Jingjiang Mutual Inductor Factory Co., Ltd. Patentee before: Xiong Jiangyong |