CN201583600U - Device for testing the dielectric loss of high voltage transformer - Google Patents

Device for testing the dielectric loss of high voltage transformer Download PDF

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Publication number
CN201583600U
CN201583600U CN2009202927806U CN200920292780U CN201583600U CN 201583600 U CN201583600 U CN 201583600U CN 2009202927806 U CN2009202927806 U CN 2009202927806U CN 200920292780 U CN200920292780 U CN 200920292780U CN 201583600 U CN201583600 U CN 201583600U
Authority
CN
China
Prior art keywords
transformer
circuit
noninductive
electrically
tested
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 - Lifetime
Application number
CN2009202927806U
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Chinese (zh)
Inventor
王天正
杨杰
武国亮
孙凤俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
Original Assignee
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd filed Critical Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
Priority to CN2009202927806U priority Critical patent/CN201583600U/en
Application granted granted Critical
Publication of CN201583600U publication Critical patent/CN201583600U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a device for testing the dielectric loss of a high voltage transformer, which solves the problems in the prior art that the high-voltage test is pressurized difficultly, and the dielectric loss test on 500 kV high voltage transformer can not be finished. The device comprises a frequency conversion circuit (1), a control circuit (2), a step-up transformer (3), a serial resonant inductor L (4) and a schering bridge (5), wherein two output terminals of the frequency conversion circuit (1) are connected with two input terminals of the step-up transformer (3) together, one input terminal of the step-up transformer (3) is connected with one end of the serial resonant inductor L (4) together, while the other input terminal thereof is grounded, and the other end of the serial resonant inductor L (4) is respectively connected with the schering bridge (5) comprising a reference capacitor (7), a tested high voltage transformer (8), a parallel non-inductive fixed resistor R4, an adjustable capacitor C4 and a non-inductive adjustable resistor R4, thereby realizing the test on the dielectric loss of the high voltage transformer.

Description

The dielectric loss of high voltage transformer proving installation
Technical field
The utility model relates to a kind of device that 500kV electric pressure mutual inductor is carried out the on-the-spot automatic measurement of high voltage dielectric loss.。
Background technology
To the measurement of mutual inductor dielectric loss is to judge the power equipment insulation important means of whole degradation such as make moist, wear out.Generally carry out in the industry at present to the test of the dielectric loss below the mutual inductor 10kV because trial voltage is far from the operating voltage that reaches specified, thereby can not effectively reflect the insulation status of this equipment.Existing equipment and measuring technology are owing to exist Hi-pot test pressurization difficulty, can't finish the test of 500kV dielectric loss of high voltage transformer, simultaneously owing to adopt the power frequency manual voltage boosting, being subjected to on-the-spot power frequency disturbs, cause the inaccurate of test data, had influence on accurate judgement dielectric loss of high voltage transformer.
Summary of the invention
The dielectric loss of high voltage transformer proving installation that the utility model provides has solved the Hi-pot test pressurization difficulty that prior art exists, and can't finish the technical matters of 500kV dielectric loss of high voltage transformer test.
The utility model overcomes the above problems by following scheme:
The dielectric loss of high voltage transformer proving installation, comprise frequency changer circuit, control circuit, step-up transformer, go here and there humorous inductor L and Schering bridge, two output terminals of described frequency changer circuit and two input ends of step-up transformer are electrically connected, output terminal of step-up transformer is electrically connected with the end of the humorous inductor L of string, another output head grounding of step-up transformer, the other end of humorous inductor L of going here and there is electrically connected the other end A of standard capacitor and noninductive fixed resistance R in parallel with an end of end of standard capacitor and tested high tension instrument transformer respectively 4With adjustable condenser C 4An end be electrically connected noninductive fixed resistance R in parallel 4With adjustable condenser C 4Other end ground connection, the other end B of tested high tension instrument transformer and noninductive adjustable resistance R 3An end be electrically connected noninductive adjustable resistance R 3Other end ground connection, between the other end B of the other end A of standard capacitor and tested high tension instrument transformer, be connected with alternating-current galvanometer P, standard capacitor, tested high tension instrument transformer, noninductive fixed resistance R in parallel 4With adjustable condenser C 4With noninductive adjustable resistance R 3Form described Schering bridge as four branch roads; Described control circuit comprises CPU main control unit, sample circuit, display circuit and A/D change-over circuit; Described frequency changer circuit is composed in series successively by rectification circuit, inverter and filtering circuit; The CPU main control unit is electrically connected with inverter and step-up transformer respectively by interface circuit; The series resonance frequency of humorous inductor L and tested high tension instrument transformer of going here and there is 45Hz~55Hz, and step-up transformer is the step-up transformer of 0~550kV.
The utility model adopts the different-frequency measure that can establish flexibly to improve measuring accuracy, has realized high voltage dielectric loss test full process automatization, intelligent test, has adopted unique split measuring technique, has guaranteed tester's safety.
Description of drawings:
Fig. 1 is a circuit structure block diagram of the present utility model
Embodiment
The dielectric loss of high voltage transformer proving installation, comprise frequency changer circuit 1, control circuit 2, step-up transformer 3, go here and there humorous inductor L4 and Schering bridge 5, two output terminals of described frequency changer circuit 1 and two input ends of step-up transformer 3 are electrically connected, output terminal of step-up transformer 3 is electrically connected with the end of the humorous inductor L4 of string, another output head grounding of step-up transformer 3, the other end of humorous inductor L4 of going here and there is electrically connected the other end A of standard capacitor 7 and noninductive fixed resistance R in parallel with an end of end of standard capacitor 7 and tested high tension instrument transformer 8 respectively 4With adjustable condenser C 4An end be electrically connected noninductive fixed resistance R in parallel 4With adjustable condenser C 4Other end ground connection, the other end B of tested high tension instrument transformer 8 and noninductive adjustable resistance R 3An end be electrically connected noninductive adjustable resistance R 3Other end ground connection, between the other end B of the other end A of standard capacitor 7 and tested high tension instrument transformer 8, be connected with alternating-current galvanometer P6, standard capacitor 7, tested high tension instrument transformer 8, noninductive fixed resistance R in parallel 4With adjustable condenser C 4With noninductive adjustable resistance R 3Form described Schering bridge 5 as four branch roads; Described control circuit 2 comprises CPU main control unit, sample circuit, display circuit and A/D change-over circuit; Described frequency changer circuit 1 is composed in series successively by rectification circuit, inverter and filtering circuit; The CPU main control unit is electrically connected with inverter and step-up transformer 3 respectively by interface circuit; The series resonance frequency of humorous inductor L4 and tested high tension instrument transformer 8 of going here and there is 45Hz~55Hz, and step-up transformer 3 is the step-up transformer of 0~550kV.

Claims (1)

1. dielectric loss of high voltage transformer proving installation, comprise frequency changer circuit (1), control circuit (2), step-up transformer (3), go here and there humorous inductor L (4) and Schering bridge (5), it is characterized in that: two input ends of two output terminals of described frequency changer circuit (1) and step-up transformer (3) are electrically connected, output terminal of step-up transformer (3) is electrically connected with the end of the humorous inductor L of string (4), another output head grounding of step-up transformer (3), the other end of humorous inductor L (4) of going here and there is electrically connected the other end A of standard capacitor (7) and noninductive fixed resistance R in parallel with an end of end of standard capacitor (7) and tested high tension instrument transformer (8) respectively 4With adjustable condenser C 4An end be electrically connected noninductive fixed resistance R in parallel 4With adjustable condenser C 4Other end ground connection, the other end B of tested high tension instrument transformer (8) and noninductive adjustable resistance R 3An end be electrically connected noninductive adjustable resistance R 3Other end ground connection, between the other end B of the other end A of standard capacitor (7) and tested high tension instrument transformer (8), be connected with alternating-current galvanometer P (6), standard capacitor (7), tested high tension instrument transformer (8), noninductive fixed resistance R in parallel 4With adjustable condenser C 4With noninductive adjustable resistance R 3Form described Schering bridge (5) as four branch roads; Described control circuit (2) comprises CPU main control unit, sample circuit, display circuit and A/D change-over circuit; Described frequency changer circuit (1) is composed in series successively by rectification circuit, inverter and filtering circuit; The CPU main control unit is electrically connected with inverter and step-up transformer (3) respectively by interface circuit; The series resonance frequency of humorous inductor L (4) and tested high tension instrument transformer (8) of going here and there is 45Hz~55Hz, and step-up transformer (3) is the step-up transformer of 0~550kV.
CN2009202927806U 2009-12-09 2009-12-09 Device for testing the dielectric loss of high voltage transformer Expired - Lifetime CN201583600U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202927806U CN201583600U (en) 2009-12-09 2009-12-09 Device for testing the dielectric loss of high voltage transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202927806U CN201583600U (en) 2009-12-09 2009-12-09 Device for testing the dielectric loss of high voltage transformer

Publications (1)

Publication Number Publication Date
CN201583600U true CN201583600U (en) 2010-09-15

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Family Applications (1)

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CN2009202927806U Expired - Lifetime CN201583600U (en) 2009-12-09 2009-12-09 Device for testing the dielectric loss of high voltage transformer

Country Status (1)

Country Link
CN (1) CN201583600U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102043099A (en) * 2010-10-28 2011-05-04 河南省电力公司平顶山供电公司 Device for testing dielectric loss at high voltage
CN105071667A (en) * 2015-08-12 2015-11-18 哈尔滨理工大学 Harmonic wave generator and method for detecting elements of power grid via the same
CN107860982A (en) * 2017-11-06 2018-03-30 国网福建省电力有限公司 The dielectric loss test circuit and its control method that a kind of pre- anti-induced electrical is sent

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102043099A (en) * 2010-10-28 2011-05-04 河南省电力公司平顶山供电公司 Device for testing dielectric loss at high voltage
CN105071667A (en) * 2015-08-12 2015-11-18 哈尔滨理工大学 Harmonic wave generator and method for detecting elements of power grid via the same
CN105071667B (en) * 2015-08-12 2017-09-12 哈尔滨理工大学 A kind of harmonic oscillator and the method detected by it to electric network element
CN107860982A (en) * 2017-11-06 2018-03-30 国网福建省电力有限公司 The dielectric loss test circuit and its control method that a kind of pre- anti-induced electrical is sent
CN107860982B (en) * 2017-11-06 2019-12-27 国网福建省电力有限公司 Dielectric loss test circuit for preventing induced electricity from being sent backwards and control method thereof

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C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20100915

Effective date of abandoning: 20091209