CN106199282A - A kind of recognition methods of secondary stalloy distribution transformer - Google Patents
A kind of recognition methods of secondary stalloy distribution transformer Download PDFInfo
- Publication number
- CN106199282A CN106199282A CN201610665871.4A CN201610665871A CN106199282A CN 106199282 A CN106199282 A CN 106199282A CN 201610665871 A CN201610665871 A CN 201610665871A CN 106199282 A CN106199282 A CN 106199282A
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- distribution transformer
- stalloy
- open circuit
- circuit loss
- recognition methods
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention provides the recognition methods of a kind of secondary stalloy distribution transformer, including open circuit loss P of detection distribution transformer0；Its open circuit loss P is detected after controlling distribution transformer overexcited operation the first preset time0'；According to open circuit loss P0' and open circuit loss P0Judge whether the iron core of distribution transformer uses secondary stalloy inferior.Compared with prior art, the recognition methods of a kind of secondary stalloy distribution transformer that the present invention provides, judge whether the iron core of distribution transformer uses secondary stalloy inferior according to the open circuit loss before and after distribution transformer overexcited operation, can identify in the case of not dismantling, not destroying distribution transformer and iron core thereof whether it uses secondary stalloy inferior, significantly improve the work efficiency of Quality of Transformer sampling observation and reduce sampling observation cost.
Description
Technical field
The present invention relates to transformer core processing technique field, be specifically related to the knowledge of a kind of secondary stalloy distribution transformer
Other method.
Background technology
Secondary stalloy refers to the grain-oriented Si steel sheet disassembled from superseded waste and old transformator, can be used to again add
Work makes the iron core of distribution transformer.But the distribution transformer using secondary stalloy inferior to make has the disadvantages that sky
Load-loss overexcitation ability high, anti-, noise are big, unstable, cause ferrum by producing the biggest eddy-current loss in running
Core local pyrexia, makes the high-low pressure winding temperature rise of distribution transformer aggravate.Meanwhile, secondary stalloy has extremely low insulation resistance
Easily cause core insulation to puncture, ultimately cause distribution transformer and burn because winding insulation punctures and even explode.
At present, direct method and indirect method can be used stalloy in distribution transformer to be carried out sampling check for quality, specifically:
1, direct method
By connecing dismounting distribution transformer, detect the quality of stalloy in its iron core, but this method has bigger
Work when economic cost and practical operation heavy.
2, indirect method
Distribution transformer ferrum is judged with the ratio shared by fundamental frequency according to higher hamonic wave in the noise spectrum of distribution transformer
In core, whether stalloy contains secondary stalloy inferior: if the proportion of higher hamonic wave is the biggest in noise spectrum, stalloy
State is the poorest, and the service life of this stalloy is the longest, therefore this stalloy be secondary stalloy or secondary stalloy inferior can
Energy property is the highest.But this method requires have identical capacity, identical core structure, identical silicon steel with distribution transformer to be detected
The distribution transformer that the new stalloy of employing of sheet model manufactures is as standard control, and during actual execution, difficulty and cost are the biggest.
Summary of the invention
In order to overcome the defect of prior art, the invention provides the identification side of a kind of secondary stalloy distribution transformer
Method.
Described recognition methods includes:
Open circuit loss P of detection distribution transformer0；
Its open circuit loss P ' is detected after controlling described distribution transformer overexcited operation the first preset time0；
According to described open circuit loss P '0With open circuit loss P0Judge whether the iron core of described distribution transformer uses inferior two
Secondary stalloy.
The optimal technical scheme that the present invention further provides is:
Described control distribution transformer overexcited operation includes:
Voltage U ' is applied to the low-pressure side of described distribution transformer1, disconnect the high-pressure side of described distribution transformer；
Wherein, U '1=(1.0～1.3) U1, U1Rated voltage for distribution transformer.
The optimal technical scheme that the present invention further provides is:
Also include after described control distribution transformer overexcited operation the first preset time:
Described distribution transformer after power-off is stood the second preset time.
The optimal technical scheme that the present invention further provides is:
Described first preset time is 20～50 hours；
Second preset time is 20～30 hours.
The optimal technical scheme that the present invention further provides is:
Described according to open circuit loss P '0With open circuit loss P0Judge whether the iron core of distribution transformer uses secondary silicon inferior
Steel disc includes:
IfThe most described iron core uses secondary stalloy inferior；
IfThe most described iron core is provided without secondary stalloy inferior；
Wherein, K is open circuit loss proportion threshold value.
The optimal technical scheme that the present invention further provides is:
Described open circuit loss proportion threshold value K=10%.
Compared with immediate prior art, the invention has the beneficial effects as follows:
The recognition methods of a kind of secondary stalloy distribution transformer that the present invention provides, is crossed by detection distribution transformer and encourages
Open circuit loss before and after magnetic operation, the value comparing twice open circuit loss judges whether the iron core of distribution transformer uses secondary inferior
Stalloy, it is possible to identify in the case of not dismantling, not destroying distribution transformer and iron core thereof whether it uses secondary silicon inferior
Steel disc, significantly improves the work efficiency of Quality of Transformer sampling observation and reduces sampling observation cost.
Accompanying drawing explanation
Fig. 1: the implementing procedure schematic diagram of the recognition methods of a kind of secondary stalloy distribution transformer in the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely illustrated, it is clear that described embodiment is
The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Combine accompanying drawing separately below, the identification side to a kind of secondary stalloy distribution transformer that the embodiment of the present invention provides
Method illustrates.
Fig. 1 is the implementing procedure schematic diagram of the recognition methods of a kind of secondary stalloy distribution transformer in the present invention, such as figure
Shown in, in the present embodiment, the recognition methods of secondary stalloy distribution transformer comprises the steps:
Step S101: open circuit loss P of detection distribution transformer0。
Step S102: detect its open circuit loss P ' after controlling distribution transformer overexcited operation the first preset time0。
Step S103: according to open circuit loss P '0With open circuit loss P0Judge whether the iron core of distribution transformer uses inferior two
Secondary stalloy.
By the open circuit loss before and after detection distribution transformer overexcited operation in the present embodiment, compare twice open circuit loss
Value judge whether the iron core of distribution transformer uses secondary stalloy inferior, it is possible to do not dismantling, do not destroying distribution transformer
And in the case of iron core, identify whether it uses secondary stalloy inferior, significantly improve the work of Quality of Transformer sampling observation
Make efficiency and reduce sampling observation cost.
Further, controlling distribution transformer overexcited operation in the present invention can use following method to implement.
Voltage U ' is applied to the low-pressure side of distribution transformer1, disconnect the high-pressure side of distribution transformer, distribution transformer
To operate in overexcitation state.Wherein, U '1=(1.0～1.3) U1, U1Rated voltage for distribution transformer.
Further, the present invention detects the open circuit loss P ' of distribution transformer0Following method can also be used to implement.
(1) distribution transformer continuous overexcited operation the first preset time is controlled.
(2) distribution transformer after power-off is stood the second preset time continuously.
(3) the open circuit loss P ' of the distribution transformer after detection stands the second preset time0。
In the present embodiment, the first preset time can be 20～50 hours, and the second preset time can be 20～30 hours.
Further, the present invention judging, whether the iron core of distribution transformer uses secondary stalloy inferior to use down
Method of stating is implemented.
According to open circuit loss P '0With open circuit loss P0Judge whether its iron core uses secondary stalloy inferior, particularly as follows:
IfThen iron core uses secondary stalloy inferior；
IfThen iron core is provided without secondary stalloy inferior；
Wherein, K is open circuit loss proportion threshold value.In the present embodiment, open circuit loss proportion threshold value K can be 10%.
The distribution transformer made secondary stalloy and new stalloy respectively below as the embodiment above tries
Checking.
Embodiment 1
In the present embodiment, the thickness of secondary stalloy is 0.35mm, and new stalloy uses 35Q135 stalloy, two distribution
Transformator is the oil immersion-type distribution transformer that structure is identical, and its electric pressure is 10kV, capacity is 30kVA.According to above-mentioned enforcement
Scheme carries out verification experimental verification to the two distribution transformer respectively, particularly as follows:
(1) detecting the open circuit loss of distribution transformer, open circuit loss value is as shown in table 1.
(2) control distribution transformer overexcited operation 24 hours and power-off standing detected its open circuit loss after 24 hours, empty
Load-loss value is as shown in table 1.Wherein, voltage U ' is applied to its low-pressure side during controlling distribution transformer overexcited operation1=
1.25U1。
(3) judge whether the iron core of distribution transformer uses secondary stalloy inferior, unloaded damage according to above-mentioned open circuit loss
Consumption comparative result is as shown in table 1.
Table 1
Understanding, by table 1, its open circuit loss ratio of distribution transformer being made up of secondary stalloy is 17.2%, more than it
Open circuit loss proportion threshold value, its open circuit loss ratio of the distribution transformer being made up of new stalloy is 2.3%, less than its unloaded damage
Consumption proportion threshold value, such that it is able to the recognition methods of the secondary stalloy distribution transformer of checking present invention proposition is implemented reliable.
Embodiment 2
In the present embodiment, the thickness of secondary stalloy is 0.30mm, and new stalloy uses 30Q120 stalloy, two distribution
Transformator is the oil immersion-type distribution transformer that structure is identical, and its electric pressure is 10kV, capacity is 30kVA.According to above-mentioned enforcement
Scheme carries out verification experimental verification to the two distribution transformer respectively, particularly as follows:
(1) detecting the open circuit loss of distribution transformer, open circuit loss value is as shown in table 2.
(2) control distribution transformer overexcited operation 36 hours and power-off standing detected its open circuit loss after 30 hours, empty
Load-loss value is as shown in table 2.Wherein, voltage U ' is applied to its low-pressure side during controlling distribution transformer overexcited operation1=
1.15U1。
(3) judge whether the iron core of distribution transformer uses secondary stalloy inferior, unloaded damage according to above-mentioned open circuit loss
Consumption comparative result is as shown in table 2.
Table 2
Understanding, by table 2, its open circuit loss ratio of distribution transformer being made up of secondary stalloy is 15.5%, more than it
Open circuit loss proportion threshold value, its open circuit loss ratio of the distribution transformer being made up of new stalloy is 3.6%, less than its unloaded damage
Consumption proportion threshold value, such that it is able to the recognition methods of the secondary stalloy distribution transformer of checking present invention proposition is implemented reliable.
Embodiment 3
In the present embodiment, the thickness of secondary stalloy is 0.27mm, and new stalloy uses 27QG095 stalloy, two distribution
Transformator is the oil immersion-type distribution transformer that structure is identical, and its electric pressure is 10kV, capacity is 30kVA.According to above-mentioned enforcement
Scheme carries out verification experimental verification to the two distribution transformer respectively, particularly as follows:
(1) detecting the open circuit loss of distribution transformer, open circuit loss value is as shown in table 3.
(2) control distribution transformer overexcited operation 40 hours and power-off standing detected its open circuit loss after 24 hours, empty
Load-loss value is as shown in table 3.Wherein, voltage U ' is applied to its low-pressure side during controlling distribution transformer overexcited operation1=
1.2U1。
(3) judge whether the iron core of distribution transformer uses secondary stalloy inferior, unloaded damage according to above-mentioned open circuit loss
Consumption comparative result is as shown in table 3.
Table 3
Understanding, by table 3, its open circuit loss ratio of distribution transformer being made up of secondary stalloy is 13.3%, more than it
Open circuit loss proportion threshold value, its open circuit loss ratio of the distribution transformer being made up of new stalloy is 1.8%, less than its unloaded damage
Consumption proportion threshold value, such that it is able to the recognition methods of the secondary stalloy distribution transformer of checking present invention proposition is implemented reliable.
Embodiment 4
In the present embodiment, the thickness of secondary stalloy is 0.23mm, and new stalloy uses 23QG090 stalloy, two distribution
Transformator is the oil immersion-type distribution transformer that structure is identical, and its electric pressure is 10kV, capacity is 30kVA.According to above-mentioned enforcement
Scheme carries out verification experimental verification to the two distribution transformer respectively, particularly as follows:
(1) detecting the open circuit loss of distribution transformer, open circuit loss value is as shown in table 4.
(2) control distribution transformer overexcited operation 48 hours and power-off standing detected its open circuit loss after 30 hours, empty
Load-loss value is as shown in table 4.Wherein, voltage U ' is applied to its low-pressure side during controlling distribution transformer overexcited operation1=
1.1U1。
(3) judge whether the iron core of distribution transformer uses secondary stalloy inferior, unloaded damage according to above-mentioned open circuit loss
Consumption comparative result is as shown in table 4.
Table 4
Understanding, by table 4, its open circuit loss ratio of distribution transformer being made up of secondary stalloy is 12.7%, more than it
Open circuit loss proportion threshold value, its open circuit loss ratio of the distribution transformer being made up of new stalloy is 1.4%, less than its unloaded damage
Consumption proportion threshold value, such that it is able to the recognition methods of the secondary stalloy distribution transformer of checking present invention proposition is implemented reliable.
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention
God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof
Within, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. the recognition methods of a secondary stalloy distribution transformer, it is characterised in that described recognition methods includes:
Open circuit loss P of detection distribution transformer0；
Its open circuit loss P is detected after controlling described distribution transformer overexcited operation the first preset time0'；
According to described open circuit loss P0' and open circuit loss P0Judge whether the iron core of described distribution transformer uses secondary silicon inferior
Steel disc.
The recognition methods of a kind of secondary stalloy distribution transformer the most as claimed in claim 1, it is characterised in that
Described control distribution transformer overexcited operation includes:
Voltage U is applied to the low-pressure side of described distribution transformer1', disconnect the high-pressure side of described distribution transformer；
Wherein, U1'=(1.0～1.3) U1, U1Rated voltage for distribution transformer.
The recognition methods of a kind of secondary stalloy distribution transformer the most as claimed in claim 1, it is characterised in that
Also include after described control distribution transformer overexcited operation the first preset time:
Described distribution transformer after power-off is stood the second preset time.
The recognition methods of a kind of secondary stalloy distribution transformer the most as claimed in claim 3, it is characterised in that
Described first preset time is 20～50 hours；
Second preset time is 20～30 hours.
The recognition methods of a kind of secondary stalloy distribution transformer the most as claimed in claim 1, it is characterised in that
Described according to open circuit loss P0' and open circuit loss P0Judge whether the iron core of distribution transformer uses secondary stalloy inferior
Including:
IfThe most described iron core uses secondary stalloy inferior；
IfThe most described iron core is provided without secondary stalloy inferior；
Wherein, K is open circuit loss proportion threshold value.
The recognition methods of a kind of secondary stalloy distribution transformer the most as claimed in claim 5, it is characterised in that
Described open circuit loss proportion threshold value K=10%.
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| CN201610665871.4A CN106199282A (en) | 2016-08-12 | 2016-08-12 | A kind of recognition methods of secondary stalloy distribution transformer |
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| CN201610665871.4A CN106199282A (en) | 2016-08-12 | 2016-08-12 | A kind of recognition methods of secondary stalloy distribution transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113552852A (en) * | 2021-06-16 | 2021-10-26 | 南方电网科学研究院有限责任公司 | Method and system for controlling no-load performance of transformer, computer equipment and storage medium |
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| CN113552852A (en) * | 2021-06-16 | 2021-10-26 | 南方电网科学研究院有限责任公司 | Method and system for controlling no-load performance of transformer, computer equipment and storage medium |
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Application publication date: 20161207 |