CN102945739B - Power-frequency single-phase resonant transformer for calibration and boosting of voltage transformer - Google Patents

Power-frequency single-phase resonant transformer for calibration and boosting of voltage transformer Download PDF

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Publication number
CN102945739B
CN102945739B CN 201210441144 CN201210441144A CN102945739B CN 102945739 B CN102945739 B CN 102945739B CN 201210441144 CN201210441144 CN 201210441144 CN 201210441144 A CN201210441144 A CN 201210441144A CN 102945739 B CN102945739 B CN 102945739B
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China
Prior art keywords
transformer
voltage
winding
compensation
line bag
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CN102945739A (en
Inventor
黄奇峰
徐敏锐
卢树峰
杨世海
余青
李刚
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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Priority to CN 201210441144 priority Critical patent/CN102945739B/en
Publication of CN102945739A publication Critical patent/CN102945739A/en
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Publication of CN102945739B publication Critical patent/CN102945739B/en
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Abstract

The invention discloses a power-frequency single-phase resonant transformer for onsite calibration and boosting of a voltage transformer. A resonant transformer body (2) and a compensation type adjustable reactor (14) are arranged in a transformer shell (4), a cable package (3) is arranged in the resonant transformer body (2) and comprises a low-voltage winding (10), a medium-voltage compensation winding (12) and a high-voltage winding (9), and the medium-voltage compensation winding (12) is provided with a medium-voltage tap and is connected with the compensation type adjustable reactor (14) through the medium-voltage tap. Due to connection with the compensation type adjustable reactor through the medium-voltage tap, an inductive component can be introduced, the internal impedance of the resonant transformer can be adjusted to be matched with the capacitance of the tested voltage transformer to form a resonant testing circuit, and the input capacity of the low-voltage winding can be reduced effectively. Moreover, the power-frequency single-phase resonant transformer has the advantages of small size, light weight and good application prospects, and the onsite calibration and boosting of the voltage transformer on a vehicle can be realized.

Description

Be used for the single-phase resonance transformer of power frequency that the voltage transformer calibration is boosted
Technical field
The present invention relates to a kind of single-phase resonance transformer of power frequency that boosts for 500 kV voltage transformer field-checkings, belong to high voltage power transmission and transformation technical field.
Background technology
Along with going deep into of power industry system reform, the accuracy of high pressure metering devices such as electric power mutual-inductor is directly connected to the fair and just and fast-developing of electricity market, therefore high pressure metering device such as electric power mutual-inductor need detect by the rules requirement of " electric power mutual-inductor ", wherein the 500kV voltage transformer belongs to the high-tension apparatus of fixed installation formula, can only carry out the scene detects, to 500 kV voltage transformer verifications the time, the power frequency of tested voltage transformer need be risen to rated voltage, to simulate the actual motion state of tested voltage transformer, thereby compare with standard potential transformer and to realize the transmission of quantity value work of national standard, the voltage transformer of 500 kV electric pressures mostly is capacitance type potential transformer, be capacitive character during its electrician's frequency, and the scene when testing tested voltage transformer can't take out stitches, need whole section bus or GIS pipeline together with boosting, thereby the input capacity of low pressure winding adds ground capacitance, should add the size of ground capacitance and the length of bus or GIS pipeline, the testing ground environment, overhead wire layouts etc. are relevant, it is a non-regularity, discrete numerical value can influence the accuracy of detection of 500kV voltage transformer.
Summary of the invention
The objective of the invention is to overcome the problems of the prior art, what provide is used for the single-phase resonance transformer of power frequency that the voltage transformer field-checking boosts, press the compensation winding to introduce perceptual weight in being equipped with, can adjust the internal driving of resonance transformer, and be complementary with tested voltage transformer capacitance and form the resonance test loop, effectively reduce the input capacity of low pressure winding, and volume is little, in light weight, be convenient to vehicle-mountedization that realize that the voltage transformer field-checking boosts, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking, comprise bushing and transformer case, described bushing is positioned at the top of transformer case, it is characterized in that: described transformer case inside is provided with resonance transformer main body and compensation Regulatable reactor, be provided with the line bag in the described resonance transformer main body, described line bag comprises low pressure winding, middle pressure compensation winding and high pressure winding, press the compensation winding to be provided with the tap of middle pressure in described, and be connected with described compensation Regulatable reactor by middle pressure tap.
The aforesaid single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking, it is characterized in that: described line bag is connected by the securing member of insulating part with resonance transformer main body one side.
The aforesaid single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking, it is characterized in that: described line bag also comprises iron core column, described low pressure winding, middle pressure compensation winding and high pressure winding are looped around on the described iron core column from inside to outside successively.
The aforesaid single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking, it is characterized in that: described line bag is fixed on transformer case inside by line bag fixed mount.
The invention has the beneficial effects as follows: the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking provided by the invention, press the compensation winding in being equipped with, be connected with described compensation Regulatable reactor by middle pressure tap, introduce perceptual weight, can adjust the internal driving of resonance transformer, and be complementary with tested voltage transformer capacitance and form the resonance test loop, effectively reduce the input capacity of low pressure winding, and volume is little, in light weight, and be provided with vibration protection, be convenient to realize have a good application prospect vehicle-mountedization that 500 kV voltage transformer field-checkings are boosted.
Description of drawings
Fig. 1 is the structural representation of the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking of the present invention.
Fig. 2 is the structural representation of resonance transformer main body of the present invention.
Fig. 3 is the structural representation of line bag of the present invention.
Implication mark in the accompanying drawing is as follows:
1: bushing; 2: the resonance transformer main body; 3: the line bag; 4: transformer case; 5: securing member; 6: insulating part; 7: iron core column; 8: line bag fixed mount; 9: the high pressure winding; 10: the low pressure winding; 11: the compensation Regulatable reactor; 12: middle pressure compensation winding.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As Fig. 1, Fig. 2 and shown in Figure 3, the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking of the present invention, press the compensation winding in being provided with in the line bag, introduce perceptual weight to adjust the internal driving of resonance transformer, thereby effectively reduce input capacity, dwindle the volume and weight of testing equipment and realize vehicle-mountedization, concrete structure comprises bushing 1 and transformer case 4, bushing 1 is positioned at the top of transformer case 4, transformer case 4 inside are provided with resonance transformer main body 2 and compensation Regulatable reactor 11, be provided with line bag 3 in the resonance transformer main body 2, described line bag 3 comprises low pressure winding 10, middle compensation winding 12 and the high pressure winding 9 of pressing, the middle compensation winding 12 of pressing is provided with the middle tap of pressing, and be connected with described compensation Regulatable reactor 11 by middle pressure tap, compensation Regulatable reactor 11 can be passed through the size of its air gap and adjust inductance value, change the internal driving of whole resonance transformer, make the internal driving of resonance transformer be perceptual state, the tested 500 kV voltage transformers that are capacitive with the benefit test loop form resonance condition, the input capacity of the low pressure winding of this moment is 1/Q times of high pressure coil volume, Q is the quality factor of test loop, effectively reduce the input capacity of low pressure winding, line bag 3 is connected by the securing member 5 of insulating part 6 with resonance transformer main body 2 one sides, line bag 3 also comprises iron core column 7, low pressure winding 10, middle compensation winding 12 and the high pressure winding 9 of pressing is looped around on the described iron core column 7 from inside to outside successively, line bag 3 is fixed on transformer case 4 inside by line bag fixed mount 8, line bag 3 compact conformations of design, volume is little, in light weight, be convenient to vehicle-mountedization that realize that the voltage transformer field-checking boosts, the line bag fixed mount 8 here, transformer case 4 and bushing 1 all possess vibration protection, and adopt the SF6 gas type to insulate, satisfy the needs of vehicle-mountedization design, have a good application prospect.
More than show and described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (4)

1. be used for the single-phase resonance transformer of power frequency that the voltage transformer field-checking boosts, comprise bushing (1) and transformer case (4), described bushing (1) is positioned at the top of transformer case (4), it is characterized in that: described transformer case (4) inside is provided with resonance transformer main body (2) and compensation Regulatable reactor (11), be provided with line bag (3) in the described resonance transformer main body (2), described line bag (3) comprises low pressure winding (10), middle compensation winding (12) and the high pressure winding (9) of pressing, press compensation winding (12) to be provided with the tap of middle pressure in described, and be connected with described compensation Regulatable reactor (11) by middle pressure tap.
2. the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking according to claim 1, it is characterized in that: described line bag (3) is connected with the securing member (5) of resonance transformer main body (2) one sides by insulating part (6).
3. the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking according to claim 1, it is characterized in that: described line bag (3) also comprises iron core column (7), and described low pressure winding (10), middle pressure compensation winding (12) and high pressure winding (9) are looped around on the described iron core column (7) from inside to outside successively.
4. the single-phase resonance transformer of power frequency that boosts for the voltage transformer field-checking according to claim 1, it is characterized in that: described line bag (3) is fixed on transformer case (4) inside by line bag fixed mount (8).
CN 201210441144 2012-11-08 2012-11-08 Power-frequency single-phase resonant transformer for calibration and boosting of voltage transformer Active CN102945739B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201210441144 CN102945739B (en) 2012-11-08 2012-11-08 Power-frequency single-phase resonant transformer for calibration and boosting of voltage transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201210441144 CN102945739B (en) 2012-11-08 2012-11-08 Power-frequency single-phase resonant transformer for calibration and boosting of voltage transformer

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CN102945739A CN102945739A (en) 2013-02-27
CN102945739B true CN102945739B (en) 2013-07-10

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104569898A (en) * 2015-01-04 2015-04-29 国家电网公司 Fixing and voltage sharing device for vehicle-mounted standard voltage transformer used for verifying transformer of 500 kV
CN104851573A (en) * 2015-05-11 2015-08-19 国家电网公司 Vehicle-mounted transformer coil fixing and pressure equalizing device for 500kV mutual inductor calibration

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2210456Y (en) * 1994-07-13 1995-10-18 金玮 Transformer for the test of resonance
CN202110270U (en) * 2011-04-27 2012-01-11 国网电力科学研究院 Integrated standard device for on-site inspection of super/ extra high voltage constant-voltage transformer (CVT)
CN102288880A (en) * 2011-05-12 2011-12-21 辽宁省电力有限公司沈阳供电公司 Frequency-changing resonant withstand voltage testing device
CN202217047U (en) * 2011-08-25 2012-05-09 中国电力科学研究院 Complete field capacitive voltage transformer error checking apparatus
CN202855519U (en) * 2012-11-08 2013-04-03 江苏省电力公司电力科学研究院 Power frequency single-phase resonance transformer used for calibrating and boosting voltage of voltage transformer on site

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