CN206223870U - One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus - Google Patents
One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus Download PDFInfo
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- CN206223870U CN206223870U CN201621305415.0U CN201621305415U CN206223870U CN 206223870 U CN206223870 U CN 206223870U CN 201621305415 U CN201621305415 U CN 201621305415U CN 206223870 U CN206223870 U CN 206223870U
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Abstract
The utility model is related to one kind to be applied to YNd11 large-scale power transformer low resistance measurement apparatus, belongs to electrical equipment technical field.Technical scheme is：Comprising low pressure winding（1）, high pressure winding（2）, DC source one（3）With DC source two（4）, the DC source one（3）, DC source two（4）Model it is identical, DC source one（3）It is arranged on low pressure winding（1）With high pressure winding（2）Between, respectively with low pressure winding（1）C phases and high pressure winding（2）A phases interconnect, DC source two（4）It is arranged on high pressure winding（2）C phases and earth point between.The beneficial effects of the utility model are：, to winding series excitation, iron core is rapidly saturated by using measure, shortens the stabilization time of circuit, so as to shorten the time of the accurate measurement of low-pressure direct resistance.
Description
Technical field
The utility model is related to one kind to be applied to YNd11 large-scale power transformer low resistance measurement apparatus, belongs to electric power
Equipment technical field.
Background technology
When DCR of Transformer is measured, due to the presence of inductance in loop, its stabilization time is more long.Join for YNd11
The large-scale power transformer for connecing, when its low resistance is measured, due to the effect for not only having inductance in measuring loop, also in circuit
The transient process of each branch road in each branch road and magnetic circuit, the stabilization time of electric current is longer.
At present, it is general when the large-scale power transformer low-voltage direct resistance of YNd11 connections is measured to use magnetic assist method, to measure
As a example by low pressure winding ac phases, circuit structure such as Fig. 1；The method three-phase excitation magnetic potential unshakable in one's determination is different, the magnetic potential of B, C phase core limb
It is the 1/2 of A phases, saturated velocity unshakable in one's determination is slower, then has the magnetic flux distributions from iron core（Referring to Fig. 2）Analysis, three-phase is unshakable in one's determination
Post magnetic flux difference increased the settling time of each branch road in magnetic circuit, when effectively being measured so as to increased low-voltage direct resistance
Between.
Utility model content
The utility model purpose is to provide one kind and is applied to YNd11 large-scale power transformer low resistance measurement apparatus, leads to
Cross using measure to winding series excitation, be rapidly saturated iron core, shorten the stabilization time of circuit, so that it is accurate to shorten low-pressure direct resistance
Really the time of measurement, efficiently solve above mentioned problem present in background technology.
The technical solution of the utility model is：One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus,
Comprising low pressure winding, high pressure winding, DC source one and DC source two, the DC source one, DC source two model it is identical, direct current
Source one is arranged between low pressure winding and high pressure winding, is interconnected with the c phases of low pressure winding and the A phases of high pressure winding respectively,
DC source two is arranged between the C phases of high pressure winding and earth point.
The DC source one, the size of the series excitation of DC source two and low pressure winding, the magnetic potential of high pressure winding match.
Ammeter one, ammeter two and voltmeter are additionally provided with, the ammeter one is interconnected with DC source one, ammeter
Two are interconnected with DC source two, and voltmeter is arranged between a phases of low pressure winding and c phases.
The beneficial effects of the utility model are：, to winding series excitation, iron core is rapidly saturated by using measure, shortened
The stabilization time of circuit, so as to shorten the time of the accurate measurement of low-pressure direct resistance.
Brief description of the drawings
Fig. 1 is the schematic circuit of the utility model background technology；
Fig. 2 is the flux pattern unshakable in one's determination of the utility model background technology；
Fig. 3 is schematic circuit of the present utility model；
In figure：Low pressure winding 1, high pressure winding 2, DC source 1, DC source 24, ammeter 1, ammeter 26, voltage
Table 7.
Specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus, comprising low pressure winding 1, high pressure winding
2nd, DC source 1 and DC source 24, the DC source 1, DC source 24 model it is identical, DC source 1 is arranged on low pressure
Between winding 1 and high pressure winding 2, interconnected with the c phases of low pressure winding 1 and the A phases of high pressure winding 2 respectively, DC source 24 sets
Put between the C phases and earth point of high pressure winding 2.
The DC source 1, the size of the series excitation of DC source 24 and low pressure winding 1, the magnetic potential phase of high pressure winding 2
Match somebody with somebody.
Ammeter 1, ammeter 26 and voltmeter 7 are additionally provided with, the ammeter 1 is interconnected with DC source 1,
Ammeter 26 is interconnected with DC source 24, and voltmeter 7 is arranged between a phases of low pressure winding 1 and c phases.
In actual applications, using two same model DC sources to winding series excitation, it is ensured that each basic phase of winding magnetic potential
Together, iron core is rapidly saturated, reduces winding effective inductance, reduce the time constant of circuit, reduce each magnetic circuit magnetic flux point unshakable in one's determination
The transit time of cloth, shorten the stabilization time of circuit, reach the time for shortening the accurate measurement of low-pressure direct resistance.Can be than using conventional
Magnetic survey low resistance is helped to reduce for 50% time.
Claims (3)
- It is 1. a kind of to be applied to YNd11 large-scale power transformer low resistance measurement apparatus, it is characterised in that：Comprising low pressure winding （1）, high pressure winding（2）, DC source one（3）With DC source two（4）, the DC source one（3）, DC source two（4）Model phase Together, DC source one（3）It is arranged on low pressure winding（1）With high pressure winding（2）Between, respectively with low pressure winding（1）C phases and high pressure Winding（2）A phases interconnect, DC source two（4）It is arranged on high pressure winding（2）C phases and earth point between.
- 2. according to claim 1 a kind of suitable for YNd11 large-scale power transformer low resistance measurement apparatus, its feature It is：The DC source one（3）, DC source two（4）The size and low pressure winding of series excitation（1）, high pressure winding（2）Magnetic potential Match.
- 3. according to claim 1 a kind of suitable for YNd11 large-scale power transformer low resistance measurement apparatus, its feature It is：It is additionally provided with ammeter one（5）, ammeter two（6）And voltmeter（7）, the ammeter one（5）With DC source one（3）Mutually It is connected, ammeter two（6）With DC source two（4）Interconnect, voltmeter（7）It is arranged on low pressure winding（1）A phases and c phases Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305415.0U CN206223870U (en) | 2016-12-01 | 2016-12-01 | One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305415.0U CN206223870U (en) | 2016-12-01 | 2016-12-01 | One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN206223870U true CN206223870U (en) | 2017-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201621305415.0U Active CN206223870U (en) | 2016-12-01 | 2016-12-01 | One kind is applied to YNd11 large-scale power transformer low resistance measurement apparatus |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113391131A (en) * | 2021-08-03 | 2021-09-14 | 山东双益电气有限责任公司 | Resistance testing device and method for dry-type transformer tapping winding |
| WO2022117549A1 (en) * | 2020-12-03 | 2022-06-09 | Omicron Electronics Gmbh | Method and measuring device for determining a resistance of a transformer winding |
-
2016
- 2016-12-01 CN CN201621305415.0U patent/CN206223870U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2022117549A1 (en) * | 2020-12-03 | 2022-06-09 | Omicron Electronics Gmbh | Method and measuring device for determining a resistance of a transformer winding |
| AT524529A1 (en) * | 2020-12-03 | 2022-06-15 | Omicron Electronics Gmbh | Determining a resistance of a transformer winding |
| CN113391131A (en) * | 2021-08-03 | 2021-09-14 | 山东双益电气有限责任公司 | Resistance testing device and method for dry-type transformer tapping winding |
| CN113391131B (en) * | 2021-08-03 | 2022-07-15 | 山东双益电气有限责任公司 | Resistance testing device and method for dry-type transformer tapping winding |
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