CN106842008A - A kind of method of test transformer loaded switch - Google Patents
A kind of method of test transformer loaded switch Download PDFInfo
- Publication number
- CN106842008A CN106842008A CN201710004716.2A CN201710004716A CN106842008A CN 106842008 A CN106842008 A CN 106842008A CN 201710004716 A CN201710004716 A CN 201710004716A CN 106842008 A CN106842008 A CN 106842008A
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- CN
- China
- Prior art keywords
- loaded switch
- test
- resistance
- instrument
- tester
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- 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
Abstract
The invention discloses a kind of method of test transformer loaded switch, it is related to electric power repair technical field.Loaded switch tester and tested load switch of transformer are tested and are connected to form test loop, instrument for measuring DC resistance and loaded switch tester are in parallel, using external auxiliary DC source reduce interference fringe in test process come error to improve the acquisition precision of waveform.This method can make the collection effect of waveform more preferably, and the test of loaded switch is more accurate.
Description
Technical field
The present invention relates to transformer technology field, more particularly to a kind of method of test transformer loaded switch.
Background technology
Loaded switch is the important component of transformer, and safe operation of the load ratio bridging switch field test to transformer is played
Vital effect.Exchange loaded switch test experiments are one during electric power has load high-voltage switch gear to test must do project, it
Reliability directly determine that can transformer reliability service.Therefore when being installed, being overhauled, related experiment is carried out to it,
Ensure that loaded switch being capable of long-term safety operation.The method less stable of existing test loaded switch, contact during switch motion
Contact can produce interference, influence the accuracy of loaded switch transition waveform testing.
The content of the invention
The technical problem to be solved in the present invention is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of test transformer has load
The method of switch, the method stability is higher, and contact moment produces interference small during switch motion, can effectively improve load and open
The accuracy of transition waveform testing is closed, to ensure the safe operation of loaded switch.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of method of test transformer loaded switch, is connected by loaded switch tester and tested load switch of transformer are tested
Connect composition test loop, it is characterised in that：Instrument for measuring DC resistance and the loaded switch tester is in parallel, using external auxiliary
Help the error of interference fringe in DC source reduction test process to improve the acquisition precision of waveform, comprise the following steps that:
1）Oil sample index is checked, the entrance next step of passed examination；
2）Loaded switch D.C. resistance is detected with instrument for measuring DC resistance or loaded switch tester, loaded switch direct current
Resistance detection is qualified must to carry out next step；
3）Test transition waveform：
（1）Instrument for measuring DC resistance is opened, mutually applies auxiliary DC source to transformer is tested by instrument for measuring DC resistance, and keep
Electric current is constant；
（2）After electric current stabilization to be applied, loaded switch tester is opened, it is in parallel in the loop to apply loaded switch test electricity
Source, and keep electric current constant；The sense of current that loaded switch tester is applied is consistent with instrument for measuring DC resistance direction；
（3）After belt current stabilization, loaded switch gear is reopened or changes, loaded switch tester gathers corresponding little bellow
Shape；The waveform for collecting waveform for needed for test result.
Preferably, the loaded switch tester can realize transit time, transition waveform, the transition to load ratio bridging switch
The measurement of resistance, three-phase synchronism parameter；The instrument for measuring DC resistance measurement output current adjustable and electric current of shelves is comprised at least:1A,
The different measurement gears of 3A, 5A, 10A.
Preferably, the step 2）In loaded switch do D.C. resistance detection experiment, arcing contact and main contact need to be measured
Between value, it is to avoid roundabout loop is there are between arcing contact and main contact.
Preferably, the step（1）The size of current that middle instrument for measuring DC resistance is applied is 5A；The step（2）In
The size of current that loaded switch tester is applied is 1A.
Preferably, the step（1）Before, little bellow is first estimated according to loaded switch type and loaded switch switching time
The form of shape；In the step（3）Afterwards, compared with the transition waveform for collecting according to the transition waveform estimated, to there is load
The situation of switch testing is analyzed.
Preferably, the switching time of described loaded switch according to different types depending on, specifically include：S types be 35~
50MS, M type are 35~50MS, and V-type is 45~65MS.
It is using the beneficial effect produced by above-mentioned technical proposal：This method stability is higher, contact during switch motion
Contact produces interference small, the accuracy of loaded switch transition waveform testing can be effectively improved, to ensure the peace of loaded switch
Row for the national games.The present invention can effectively before detection means system testing precision, reduce and the possibility of error occur.That adds is auxiliary
Help DC source to be avoided that and trigger burr phenomena in waveform, improve waveform acquisition effect.
Brief description of the drawings
Fig. 1 is device connection diagram of the invention.
Specific embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
As shown in figure 1, be one embodiment of the present of invention,
A kind of method of test transformer loaded switch, is connected by loaded switch tester and tested load switch of transformer are tested
Connect composition test loop, it is characterised in that：Instrument for measuring DC resistance and the loaded switch tester is in parallel, using external auxiliary
Help the error of interference fringe in DC source reduction test process to improve the acquisition precision of waveform, comprise the following steps that:
1）Oil sample index is checked, the entrance next step of passed examination；
2）Loaded switch D.C. resistance is detected with instrument for measuring DC resistance or loaded switch tester, loaded switch direct current
Resistance detection is qualified must to carry out next step；
3）Test transition waveform：
（1）Instrument for measuring DC resistance is opened, mutually applies auxiliary DC source to transformer is tested by instrument for measuring DC resistance, and keep
Electric current is constant；
（2）After electric current stabilization to be applied, loaded switch tester is opened, it is in parallel in the loop to apply loaded switch test electricity
Source, and keep electric current constant；The sense of current that loaded switch tester is applied is consistent with instrument for measuring DC resistance direction；
（3）After belt current stabilization, loaded switch gear is reopened or changes, loaded switch tester gathers corresponding little bellow
Shape；The waveform for collecting waveform for needed for test result.
The loaded switch tester can realize transit time, transition waveform, transition resistance, three to load ratio bridging switch
The measurement of phase synchronism parameter；The instrument for measuring DC resistance measurement output current adjustable and electric current of shelves is comprised at least:1A,3A,5A,
The different measurement gears of 10A.
The step 2）In loaded switch do D.C. resistance detection experiment, need to measure between arcing contact and main contact
Value, it is to avoid roundabout loop is there are between arcing contact and main contact.
The step（1）The size of current that middle instrument for measuring DC resistance is applied is 5A；The step（2）Middle loaded switch
The size of current that tester is applied is 1A.
The step（1）Before, the shape of transition waveform is first estimated according to loaded switch type and loaded switch switching time
State；In the step（3）Afterwards, compared with the transition waveform for collecting according to the transition waveform estimated, loaded switch is surveyed
The situation of examination is analyzed.
Depending on the switching time of described loaded switch is according to different types, specifically include：S types are 35~50MS, M types
It is 35~50MS, V-type is 45~65MS.
The step 2）During middle measurement transition resistance, should avoid whether having roundabout loop between arcing contact and main contact.Such as M
Type loaded switch should measure side one group transition resistance of the contact not on position is closed when contactor is in odd or even number, keep away
Exempt from roundabout loop and cause measurement error.
After adopting the above technical scheme, the equipment acquisition precision during the test process of load switch of transformer can be improved, ripple
More preferably, the test of loaded switch is more accurate for the collection effect of shape.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of method of test transformer loaded switch, phase is tested by loaded switch tester with tested load switch of transformer
Connect and compose test loop, it is characterised in that：Instrument for measuring DC resistance and the loaded switch tester is in parallel, using external
Aid in the error of interference fringe in DC source reduction test process to improve the acquisition precision of waveform, comprise the following steps that:
1）Oil sample index is checked, passed examination carries out next step；
2）Loaded switch D.C. resistance is detected with instrument for measuring DC resistance or loaded switch tester, loaded switch direct current
Resistance detection is qualified must to carry out next step；
3）Test transition waveform：
（1）Instrument for measuring DC resistance is opened, mutually applies auxiliary DC source to transformer is tested by instrument for measuring DC resistance, and keep
Electric current is constant；
（2）After electric current stabilization to be applied, loaded switch tester is opened, it is in parallel in the loop to apply loaded switch test electricity
Source, and keep electric current constant；The sense of current that loaded switch tester is applied is consistent with instrument for measuring DC resistance direction；
（3）After belt current stabilization, loaded switch gear is reopened or changes, loaded switch tester gathers corresponding little bellow
Shape；The waveform for collecting waveform for needed for test result.
2. a kind of method of test transformer loaded switch according to claim 1, it is characterised in that the loaded switch
Tester can realize transit time, transition waveform, transition resistance, the measurement of three-phase synchronism parameter to load ratio bridging switch；
The instrument for measuring DC resistance measurement output current adjustable and electric current of shelves is comprised at least:The different measurement gears of 1A, 3A, 5A, 10A.
3. a kind of method of test transformer loaded switch according to claim 1, it is characterised in that the step 2）In
Loaded switch do D.C. resistance detection experiment, the value between arcing contact and main contact need to be measured, it is to avoid arcing contact and main contact
Between there are roundabout loop.
4. a kind of method of test transformer loaded switch according to claim 1, it is characterised in that the step（1）In
The size of current that instrument for measuring DC resistance is applied is 5A；The step（2）The electric current that middle loaded switch tester is applied is big
Small is 1A.
5. the method for a kind of test transformer loaded switch according to claim 1, it is characterised in that in the step（1）
Before, the form of transition waveform is first estimated according to loaded switch type and loaded switch switching time；In the step（3）It
Afterwards, compared with the transition waveform for collecting according to the transition waveform estimated, the situation to loaded switch test is analyzed.
6. the method for a kind of test transformer loaded switch according to claim 5, it is characterised in that the described load that has is opened
Depending on the switching time of pass is according to different types, specifically include：S types be 35~50MS, M types be 35~50MS, V-type be 45~
65MS。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004716.2A CN106842008B (en) | 2017-01-04 | 2017-01-04 | Method for testing on-load switch of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004716.2A CN106842008B (en) | 2017-01-04 | 2017-01-04 | Method for testing on-load switch of transformer |
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| CN106842008A true CN106842008A (en) | 2017-06-13 |
| CN106842008B CN106842008B (en) | 2020-07-03 |
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| CN201710004716.2A Active CN106842008B (en) | 2017-01-04 | 2017-01-04 | Method for testing on-load switch of transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
| CN113030790A (en) * | 2021-02-04 | 2021-06-25 | 华能（天津）煤气化发电有限公司 | Method for checking whether contact of tap changer of transformer is good or not |
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| CN201935973U (en) * | 2010-12-31 | 2011-08-17 | 上海市电力公司 | Integrative test device of electric test of transformer |
| CN102707181A (en) * | 2012-06-29 | 2012-10-03 | 广州供电局有限公司 | Multi-parameter electrical test control device of power transformer |
| CN103063924A (en) * | 2012-12-27 | 2013-04-24 | 江苏省电力公司电力科学研究院 | Vehicle-mounted integral three-phase direct-current resistance and transformation ratio and load comprehensive testing device and method |
| CN103293413A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Special high-voltage testing device for transformers |
| CN103698621A (en) * | 2013-09-05 | 2014-04-02 | 国家电网公司 | Vehicle-mounted transformer comprehensive test system |
| US20150035538A1 (en) * | 2012-04-27 | 2015-02-05 | Alfred Bieringer | Method for monitoring an on-load tap changer |
| CN205594052U (en) * | 2016-05-10 | 2016-09-21 | 国网江苏省电力公司电力科学研究院 | Vehicular body jie decreases and direct current resistance transformation ratio has measurement of carrying an automatic switching device |
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Patent Citations (7)
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|---|---|---|---|---|
| CN201935973U (en) * | 2010-12-31 | 2011-08-17 | 上海市电力公司 | Integrative test device of electric test of transformer |
| US20150035538A1 (en) * | 2012-04-27 | 2015-02-05 | Alfred Bieringer | Method for monitoring an on-load tap changer |
| CN102707181A (en) * | 2012-06-29 | 2012-10-03 | 广州供电局有限公司 | Multi-parameter electrical test control device of power transformer |
| CN103063924A (en) * | 2012-12-27 | 2013-04-24 | 江苏省电力公司电力科学研究院 | Vehicle-mounted integral three-phase direct-current resistance and transformation ratio and load comprehensive testing device and method |
| CN103293413A (en) * | 2013-05-19 | 2013-09-11 | 国家电网公司 | Special high-voltage testing device for transformers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
| CN113030790A (en) * | 2021-02-04 | 2021-06-25 | 华能（天津）煤气化发电有限公司 | Method for checking whether contact of tap changer of transformer is good or not |
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| CN106842008B (en) | 2020-07-03 |
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