CN107367637A - The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument - Google Patents
The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument Download PDFInfo
- Publication number
- CN107367637A CN107367637A CN201710575276.6A CN201710575276A CN107367637A CN 107367637 A CN107367637 A CN 107367637A CN 201710575276 A CN201710575276 A CN 201710575276A CN 107367637 A CN107367637 A CN 107367637A
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- winding
- test
- instrument
- dielectric loss
- transformer
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a kind of Transformer Winding insulaion resistance and the automatic testing method of dielectric loss detecting instrument, the detecting instrument includes master controller, the power module being connected with master controller, rectification module, voltage measurement module and current measurement module, some built-in electronic switch and 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface, some built-in electronic switching switches and 4 High voltage output interfaces, 4 current output interfaces and the corresponding connection of 1 low pressure output interface, corresponding built-in electronic switching is controlled to switch on-off come the change detection mode of connection by controller；The automatic testing method can be changed without wiring, output voltage type (AC or DC) and method of testing (insulaion resistance or dielectric loss) only need to be changed, the switching of Dielectric Loss Test and insulation resistance test is can be achieved with, is possessed and simple function instrument identical performance.
Description
Technical field
The present invention relates to a kind of Transformer Winding insulaion resistance and the automatic testing method of dielectric loss detecting instrument.
Background technology
High-power transformer does the transmission of electric energy in power network, the nucleus equipment of conversion, once break down, caused by influence compared with
Greatly, therefore according to relevant criterion, need periodical power failure to carry out checking experiment to it, to examine its performance whether intact, meet operation
It is required that.
It is time-consuming longer because transformer test project is more during the progress routine test that has a power failure, need to test in test process
Personnel constantly change test wiring, and the principle of different method of testings and operating method are different, the requirement to personnel compared with
It is high.In addition, the test voltage used in test is general higher, regulated procedure must be performed before and after experiment, once neglect, quilt
Examination transformer may remain higher voltage, may cause human casualty accident.
Insulation Resistance of Transformer is tested and medium loss test is the main routine test side for examining transformer insulated performance
Method.Two kinds of test methods are both needed to carry out several times during experiment, every time experiment between be both needed to personnel climb up transformer carry out electric discharge and
Wiring is changed, the testing time is relatively long, needs 40 to 60 minutes or so (not considering test abnormality situation).Two pilot projects one
As need to take or so 1.5 to 2 hours altogether, occupy more than the 50% of whole test period.
At present, it is typically all to be respectively adopted absolutely that Insulation Resistance of Transformer experiment and medium loss test are carried out in domestic industry
Edge resistance meter and dielectric loss measuring instrument device are detected, and are also to change wiring by several times to detect to each side winding of transformer.
This mode is carrying out another pilot project after usually first completing a pilot project, and each pilot project needs when carrying out
Test wiring is adjusted, the manpower of consuming and time are longer.
Part producer has development to possess the test apparatus for being provided simultaneously with insulaion resistance and Dielectric Loss Test function, test transformer
Wiring can not be changed during certain side winding, realizes the detection of winding insulation resistance and dielectric loss successively, but still needs artificial become
The method of more test connection realizes the experiment of each side winding of transformer.This mode detection time can relatively original mode reduce
50% or so.
The content of the invention
The invention provides a kind of Transformer Winding insulaion resistance and the automatic testing method of dielectric loss detecting instrument, its
Overcome the deficiencies in the prior art described in background technology.
The technical solution adopted for the present invention to solve the technical problems is：
The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument, the detecting instrument include master control
Device processed, it is the power module being connected with master controller, rectification module, voltage measurement module and current measurement module, some built-in
Electronic switch and 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface, some in-built electricals
The connection corresponding with 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface of son switching switch, passes through control
The corresponding built-in electronic switching of device control, which switches on-off, carrys out the change detection mode of connection；
Its automatic testing method includes following detecting step：
Step 1, the high, medium and low side winding of transformer is distinguished into short circuit；
Step 2, high, medium and low winding is connected respectively to the High voltage output of automatic detection instrument with 3 high-voltage output lines
1X, High voltage output 2X, High voltage output 3X；
Step 3, instrument is arranged to insulaion resistance and medium loss test while detected, and output voltage is respectively set to direct current
5kV with exchange 10kV, transformer type selection is three-winding transformer；
Step 4, after being provided with, firing test；
Step 5, the insulation resistance test on high pressure winding centering pressure, low pressure winding and ground is carried out；Instrument internal passes through electronics
High voltage output 2X, High voltage output 3X are grounded by switch, High voltage output 1X outputs DC experiment voltage 5kV, test period T, instrument
The absorptance of the 15s insulaion resistances and 60s insulaion resistances of automatic record high pressure winding；
Step 6, instrument internal electronic switch is constant, the dielectric loss of detection high pressure winding centering pressure, low pressure winding and ground
Experiment；High voltage output 1X output exchange 10kV, instrument record automatically the centering of high pressure winding, low pressure winding and ground dielectric loss and
Capacitance test value；
Step 7, instrument changes internal electron switch automatically, and alternately high pressure winding is to low pressure winding and ground, senior middle school
Low pressure winding over the ground, it is middle pressure winding to high-low pressure winding and ground, low pressure winding to high pressure winding and the insulation resistance test on ground
And medium loss test.
Among one embodiment：Also include step 8, after total Test terminates, in liquid crystal display screen display result of the test, and
Prompting printing.
Among one embodiment：There is abnormal, then automatic decompression, electric discharge, and prompt to check in experiment midway；Again experiment can be from
There is abnormal part to start.
Among one embodiment：The test period T can be arranged as required to.
Among one embodiment：The detecting instrument also includes the keyboard input module for setting, and it connects main control module；
Among one embodiment：The detecting instrument, which is matched somebody with somebody, is arranged with the p-wire that 3 bands for being used for high tension voltage output shield, and 4
Root testing current line and 4 groups of low-voltage lines.
Compared with background technology, it has the following advantages that the technical program：
The detecting instrument that the present invention disposably can guide to all test leads below transformer, by automatic detection instrument
Portion electronic switch automatically switches to realize the change of the different test modes of connection, and is detected automatically on request, so can be with
The number of transformer adjustment wiring above and below tester is reduced, the physical demands of staff is saved, improves operating efficiency, and
And reduce the security risk of tester.
The automatic testing method can be changed without wiring, only need to change output voltage type (AC or DC) and method of testing
(insulaion resistance or dielectric loss), can be achieved with the switching of Dielectric Loss Test and insulation resistance test, possess identical with simple function instrument
Performance.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is that the detection of the automatic detection instrument of the Transformer Winding insulaion resistance and dielectric loss described in the present embodiment connects
Line schematic diagram.
Embodiment
Fig. 1, Transformer Winding insulaion resistance and dielectric loss automatic detection instrument are refer to, it includes：
Master controller, the regulation and control for detection process；
Power module, rectification module, can be achieved exchange 0-10kV and direct current 0-10kV voltages stepping output, for for be situated between
Matter loss test and insulation resistance test provide test voltage；
Voltage measurement module and current measurement module, for the automatic detection of test voltage and test current, and measure essence
Degree is not less than 1.5%；
Some built-in electronic switch, for detecting the automatic switchover of the mode of connection, can meet that Transformer Winding is anti-
Connection not thread-changing automatic detection, the positive connection detection of capacitive battery current transformer, the four-way of sleeve pipe, capacitance type potential transformer
Triple channel self-excitation method detection etc. requires；
4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface, it can meet while carry out 3 CVT
The demanded power output of self-excitation method experiment；
Display interface and the keyboard input module for setting；
The voltage measurement module, current measurement module, electronic switch, display interface and keyboard input module with master
Controller connects, and some built-in electronic switching switches are defeated with 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure
Outgoing interface is corresponding to be connected, and controls corresponding built-in electronic switching to switch on-off come the change detection mode of connection by controller, from
And realize the automatic switchover of medium loss test and insulation resistance test.
The automatic detection instrument also includes printout module, and it connects master controller, is also used for high pressure with being arranged with 3
The p-wire of the band shielding of voltage output, 4 testing current lines and 4 groups of low-voltage lines.
Based on the automatic detection instrument of above-mentioned Transformer Winding insulaion resistance and dielectric loss, its detection method is included such as
Lower detecting step：
(1) the high, medium and low side winding of transformer is distinguished into short circuit；
(2) high, medium and low winding is connected respectively to High voltage output 1X, the height of automatic detection instrument with 3 high-voltage output lines
Pressure output 2X, High voltage output 3X；
(3) instrument is arranged to insulaion resistance and medium loss test while detected, and output voltage is respectively set to direct current 5kV
With exchange 10kV, transformer type selection is three-winding transformer；
(4) after being provided with, firing test；
(5) insulation resistance test on high pressure winding centering pressure, low pressure winding and ground is carried out；Instrument internal passes through electronic switch
High voltage output 2X, High voltage output 3X are grounded, High voltage output 1X output DC experiments voltage 5kV, test period T (can be according to need
Set, give tacit consent to 1min), instrument records the 15s insulaion resistances of high pressure winding and the absorptance of 60s insulaion resistances automatically；
(6) instrument internal electronic switch is constant, the dielectric loss examination of detection high pressure winding centering pressure, low pressure winding and ground
Test；High voltage output 1X output exchange 10kV, instrument record the dielectric loss and electricity on the centering of high pressure winding, low pressure winding and ground automatically
Volume test value；
(7) instrument changes internal electron switch automatically, and alternately high pressure winding is to low pressure winding and ground, senior middle school's low pressure
Winding over the ground, middle pressure winding to high-low pressure winding and ground, low pressure winding to the insulation resistance test and Jie on high pressure winding and ground
Matter loss test.
The switching mode of instrument internal electronic switch such as following table during different wiring：
Above-mentioned test connection can instrument default setting, also can voluntarily select as needed.
(8) after total Test terminates, in liquid crystal display screen display result of the test, and prompt to print.
(9) experiment midway occurs abnormal, automatic decompression, electric discharge, and prompts to check；Again experiment can be from there is abnormal part
Start (can artificial selection).
It is described above, only present pre-ferred embodiments, therefore the scope that the present invention is implemented can not be limited according to this, i.e., according to
The equivalent changes and modifications that the scope of the claims of the present invention and description are made, all should still it belong in the range of the present invention covers.
Claims (6)
1. the automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument, it is characterised in that：The detector
Device includes master controller, the power module being connected with master controller, rectification module, voltage measurement module and current measurement mould
Block, some built-in electronic switch and 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface,
Some built-in electronic switching switches are corresponding with 4 High voltage output interfaces, 4 current output interfaces and 1 low pressure output interface
Connection, corresponding built-in electronic switching is controlled to switch on-off come the change detection mode of connection by controller；
Its automatic testing method includes following detecting step：
Step 1, the high, medium and low side winding of transformer is distinguished into short circuit；
Step 2, high, medium and low winding is connected respectively to High voltage output 1X, the height of automatic detection instrument with 3 high-voltage output lines
Pressure output 2X, High voltage output 3X；
Step 3, instrument is arranged to insulaion resistance and medium loss test while detected, and output voltage is respectively set to direct current 5kV
With exchange 10kV, transformer type selection is three-winding transformer；
Step 4, after being provided with, firing test；
Step 5, the insulation resistance test on high pressure winding centering pressure, low pressure winding and ground is carried out；Instrument internal passes through electronic switch
High voltage output 2X, High voltage output 3X are grounded, High voltage output 1X outputs DC experiment voltage 5kV, test period T, instrument is automatic
Record the 15s insulaion resistances of high pressure winding and the absorptance of 60s insulaion resistances；
Step 6, instrument internal electronic switch is constant, the medium loss test of detection high pressure winding centering pressure, low pressure winding and ground；
High voltage output 1X output exchange 10kV, instrument record the dielectric loss and electric capacity on the centering of high pressure winding, low pressure winding and ground automatically
Measure test value；
Step 7, instrument changes internal electron switch automatically, and alternately high pressure winding is to low pressure winding and ground, senior middle school's low pressure
Winding over the ground, middle pressure winding to high-low pressure winding and ground, low pressure winding to the insulation resistance test and Jie on high pressure winding and ground
Matter loss test.
2. the automatic testing method of Transformer Winding insulaion resistance according to claim 1 and dielectric loss detecting instrument,
It is characterized in that：Also include step 8, after total Test terminates, in liquid crystal display screen display result of the test, and prompt to print.
3. the automatic detection side of Transformer Winding insulaion resistance according to claim 1 or 2 and dielectric loss detecting instrument
Method, it is characterised in that：There is abnormal, then automatic decompression, electric discharge, and prompt to check in experiment midway；Again experiment can be from there is exception
Part start.
4. the automatic testing method of Transformer Winding insulaion resistance according to claim 1 and dielectric loss detecting instrument,
It is characterized in that：The test period T can be arranged as required to.
5. the automatic testing method of Transformer Winding insulaion resistance according to claim 1 and dielectric loss detecting instrument,
It is characterized in that：The detecting instrument also includes the keyboard input module for setting, and it connects main control module.
6. the automatic testing method of Transformer Winding insulaion resistance according to claim 1 and dielectric loss detecting instrument,
It is characterized in that：The detecting instrument matches somebody with somebody the p-wire for being arranged with 3 band for being used for high tension voltage output shieldings, 4 testing currents
Line and 4 groups of low-voltage lines.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575276.6A CN107367637A (en) | 2017-07-14 | 2017-07-14 | The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575276.6A CN107367637A (en) | 2017-07-14 | 2017-07-14 | The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument |
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| Publication Number | Publication Date |
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| CN107367637A true CN107367637A (en) | 2017-11-21 |
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ID=60307234
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| CN201710575276.6A Pending CN107367637A (en) | 2017-07-14 | 2017-07-14 | The automatic testing method of Transformer Winding insulaion resistance and dielectric loss detecting instrument |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037365A (en) * | 2018-01-19 | 2018-05-15 | 国家电网公司 | A kind of shunt reactor testboard |
| CN108761212A (en) * | 2018-07-20 | 2018-11-06 | 国网吉林省电力有限公司电力科学研究院 | Power transformation main equipment perseverance cryogenic high pressure experimental rig and test method |
| CN109066662A (en) * | 2018-08-29 | 2018-12-21 | 国网河北省电力有限公司电力科学研究院 | A kind of switching device and switching systems |
| CN109142881A (en) * | 2018-08-11 | 2019-01-04 | 国网湖南省电力有限公司电力科学研究院 | Power transformer electrical test intelligently switches line apparatus |
| CN111175577A (en) * | 2020-01-07 | 2020-05-19 | 云南铝业股份有限公司 | Method for detecting single-phase direct current resistance of in-phase and anti-parallel winding on secondary side of rectifier transformer |
| CN111707887A (en) * | 2020-05-22 | 2020-09-25 | 国网河北省电力有限公司保定供电分公司 | Optimal scheme for routine test of power transformer |
| CN111983329A (en) * | 2020-08-25 | 2020-11-24 | 广东电网有限责任公司广州供电局 | Device and method for testing dielectric loss of transformer to ground |
| US10931223B2 (en) | 2019-05-08 | 2021-02-23 | Regal Beloit America, Inc. | Circuit for detecting status of ground connection in an electric motor |
| CN112731210A (en) * | 2020-12-09 | 2021-04-30 | 江苏核电有限公司 | Main transformer electrical preventive test method without dismantling high-voltage side GIS |
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| CN103018576A (en) * | 2012-12-03 | 2013-04-03 | 杭州西湖电子研究所 | Method for measuring dielectric loss factor and insulation resistance of power transformer |
| CN103698621A (en) * | 2013-09-05 | 2014-04-02 | 国家电网公司 | Vehicle-mounted transformer comprehensive test system |
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| CN103941100A (en) * | 2014-02-28 | 2014-07-23 | 国家电网公司 | Intelligent device for measuring dielectric loss factor and insulation resistance of power transformer |
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| CN103018576A (en) * | 2012-12-03 | 2013-04-03 | 杭州西湖电子研究所 | Method for measuring dielectric loss factor and insulation resistance of power transformer |
| CN103698621A (en) * | 2013-09-05 | 2014-04-02 | 国家电网公司 | Vehicle-mounted transformer comprehensive test system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037365A (en) * | 2018-01-19 | 2018-05-15 | 国家电网公司 | A kind of shunt reactor testboard |
| CN108037365B (en) * | 2018-01-19 | 2019-12-31 | 国家电网公司 | Parallel reactor test board |
| CN108761212A (en) * | 2018-07-20 | 2018-11-06 | 国网吉林省电力有限公司电力科学研究院 | Power transformation main equipment perseverance cryogenic high pressure experimental rig and test method |
| CN108761212B (en) * | 2018-07-20 | 2023-12-29 | 国网吉林省电力有限公司电力科学研究院 | Constant low temperature and high voltage test device and test method for transformer main equipment |
| CN109142881A (en) * | 2018-08-11 | 2019-01-04 | 国网湖南省电力有限公司电力科学研究院 | Power transformer electrical test intelligently switches line apparatus |
| CN109142881B (en) * | 2018-08-11 | 2023-12-22 | 国网湖南省电力有限公司电力科学研究院 | Intelligent switching line device for electric test of power transformer |
| CN109066662A (en) * | 2018-08-29 | 2018-12-21 | 国网河北省电力有限公司电力科学研究院 | A kind of switching device and switching systems |
| US10931223B2 (en) | 2019-05-08 | 2021-02-23 | Regal Beloit America, Inc. | Circuit for detecting status of ground connection in an electric motor |
| CN111175577A (en) * | 2020-01-07 | 2020-05-19 | 云南铝业股份有限公司 | Method for detecting single-phase direct current resistance of in-phase and anti-parallel winding on secondary side of rectifier transformer |
| CN111707887A (en) * | 2020-05-22 | 2020-09-25 | 国网河北省电力有限公司保定供电分公司 | Optimal scheme for routine test of power transformer |
| CN111983329A (en) * | 2020-08-25 | 2020-11-24 | 广东电网有限责任公司广州供电局 | Device and method for testing dielectric loss of transformer to ground |
| CN112731210A (en) * | 2020-12-09 | 2021-04-30 | 江苏核电有限公司 | Main transformer electrical preventive test method without dismantling high-voltage side GIS |
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Application publication date: 20171121 |