CN104483463A - Method for identifying distribution transformer winding material - Google Patents
Method for identifying distribution transformer winding material Download PDFInfo
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- CN104483463A CN104483463A CN201410663476.3A CN201410663476A CN104483463A CN 104483463 A CN104483463 A CN 104483463A CN 201410663476 A CN201410663476 A CN 201410663476A CN 104483463 A CN104483463 A CN 104483463A
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Abstract
The invention relates to a method for identifying a distribution transformer winding material. From the perspective of the design of a distribution transformer, the parameters of a basic material of a to-be-detected distribution transformer are acquired, the distribution transformer calculation data obtained in a design calculation manner is compared with data on a nameplate or real data, and the distribution transformer winding is judged to be aluminum material if the deviation of the calculation data and the data on the nameplate or the real data reaches a condition value; the condition value is that the current density is less than 1.5A/mm<2>, the load loss is more than 5 percent of a standard value or a nameplate value, the short-circuit impedance deviation exceeds 10%, the no-load loss exceeds the standard value or the nameplate value by 5%, the no-load loss exceeds the standard value or the nameplate value by 5%, the appearance size deviation is more than 8 percent, and the weight deviation is more than 10 percent. By adopting the method, the winding material of the distribution transformer can be conveniently, rapidly and accurately identified.
Description
Technical field
The invention belongs to for field of power distribution, be particularly useful for the quality testing of distribution transforming.
Background technology
Along with riseing of copper conductor price, transformer manufacturing cost increases day by day, by competitive bidding and market pressure, and the profit atrophy gradually of distribution transforming production firm.By the driving of price interests, there is a lot of phenomenon of pretending to be copper winding with aluminium winding in the market, be embodied in full aluminium distribution transforming (high-low pressure winding is aluminum conductor entirely), half bronze medal half aluminium distribution transforming (only side winding is aluminum conductor) and copper cover aluminum distribution transforming.Fill the appearance of copper distribution transforming with aluminium, allow fraud distribution transforming manufacturer obtain interests by illegitimate competition in bid, the normal distribution transforming market of very disruptive, bring tremendous economic loss to buying side and operation side simultaneously.
Due to the difference of copper aluminum conductor in performance, make to fill the nominal performance of copper distribution transforming with aluminium or potential ability often not up to standard, often show as degradation under weight reduction, volume increase, capacity reduction, direct current resistance increase, loss increase, temperature rise rising, anti-short circuit capability, so the method for distribution transforming winding material discrimination mostly is by test judgement at present, to testing defective or suspecting with the distribution transforming strip inspection of aluminium for copper.
But according to distribution transforming the performance test results, this discrimination method Shortcomings, only judges that erroneous judgement easily appears in winding material.For standard performance, as loss, direct current resistance etc., distribution transforming manufacturer may carry out Curve guide impeller or carry out designing, producing and OEM according to regular aluminium distribution transforming; For nonstandard performance, as weight, volume etc., the material parameter adopted because of each manufacturer is different, does not have the transformer of standard to compare, cannot unify to compare judgement.Needed for distribution transforming performance test, instrument is many in addition, the time is long, also needs a large amount of technical professional, and cost is high, have a big risk, recover difficulty, and the side of examinationing generally is unwilling disintegration.Therefore a kind of convenient, fast and accurate distribution transforming winding discrimination method is needed.
Based on the problem of above-mentioned distribution transforming winding material discrimination difficulty, the present invention proposes the design from distribution transforming, by calculating distribution transforming to be checked to carry out winding material discrimination, and is achieved by technological means.
Summary of the invention
The object of the invention is to the problem solving current distribution transforming winding material discrimination difficulty, a kind of convenient, fast and accurate distribution transforming winding material discrimination method is provided.
The present invention is realized by following technical proposal:
A kind of method of distribution transforming winding material discrimination, the present invention is characterised in that, from the design angle of distribution transforming, by obtaining the stock parameter of distribution transforming to be checked, and by design calculation, the distribution transforming obtained is calculated data and nameplate data or measured data contrast, if both deviations reach conditional value, then judge that this distribution transforming winding is aluminium material; Wherein, conditional value is respectively: current density is less than 1.5A/mm
2, load loss exceeds standard value or name plate rating 5%, and short-circuit impedance deviation is more than 10%, and open circuit loss exceeds standard value or name plate rating 5%, and no-load current exceeds standard value or name plate rating 5%, and apparent size deviation is more than 8%, and deviation of weight is more than 10%.
Distribution transforming stock parameter of the present invention, including, but not limited to wire gauge, coil turn and the number of plies, iron core diameter and cross sectional shape.
Distribution transforming of the present invention calculates data, including, but not limited to current density, load loss, short-circuit impedance, open circuit loss, no-load current, temperature rise, apparent size, weight data.
The present invention is when multiple criterion comprehensive descision, and conditional value is including, but not limited to described conditional value.
If the current density calculating gained is less than 1.5A/mm2, then can judge that this wire is as aluminium material.
If the load loss calculating gained exceeds standard-required value or is greater than name plate rating 5%, short-circuit impedance exceeds standard-required scope or deviation is greater than 10% of name plate rating, then can think that this distribution transforming winding material is aluminium.
If calculating gained open circuit loss and no-load current exceed standard-required value or be greater than name plate rating 5%, then can think that this distribution transforming winding material is aluminium.
If calculate gained temperature rise to exceed standard-required value, then can think that this distribution transforming winding material is aluminium.
If calculate gained apparent size and name plate rating or actual measured value to differ by more than 8%, then can think that this distribution transforming winding material is aluminium.
If calculate the weight of gained and name plate rating or actual measured value to differ by more than 10%, then can think that this distribution transforming winding material is aluminium.
In sum, for improving the accuracy judged, should in conjunction with the determination methods comprehensive descision in the present invention when actual distribution transforming winding material discrimination.
The invention has the beneficial effects as follows:
1. the distribution transforming producer is difficult to fake, and no matter be that data fabrication or material are faked, result all can make the calculating parameter of distribution transforming and actual parameter be difficult to correspondence.
2. the method for the invention can complete without the need to a large amount of human and material resources, and the time is short, and accuracy is high.
3 the present invention can be distribution transforming buying side or examination side provides convenience, distribution transforming winding material discrimination method accurately, prevent user to be deceived, and reduce user's loss.
4. the present invention is a kind of effective distribution transforming winding discrimination method, has the remarkable advantages such as convenient, fast, accurate.
Summary of the invention is set forth further below in conjunction with accompanying drawing and example.
Accompanying drawing explanation
Fig. 1 winding size and core dimensions calculation flow chart;
Fig. 2 wire parameter and load characteristic calculate decision flow chart;
Fig. 3 no-load characteristic calculates decision flow chart;
Fig. 4 distribution transforming apparent size calculates decision flow chart;
Fig. 5 distribution transforming temperature rise calculates decision flow chart;
Fig. 6 distribution transforming Weight computation decision flow chart.
Embodiment
A kind of method of distribution transforming winding material discrimination, the present invention is characterised in that, from the design angle of distribution transforming, by obtaining the stock parameter of distribution transforming to be checked, and by design calculation, the distribution transforming obtained is calculated data and nameplate data or measured data contrast, if both deviations reach conditional value, then judge that this distribution transforming winding is aluminium material; Wherein, conditional value is respectively: current density is less than 1.5A/mm
2, load loss exceeds standard value or name plate rating 5%, and short-circuit impedance deviation is more than 10%, and open circuit loss exceeds standard value or name plate rating 5%, and no-load current exceeds standard value or name plate rating 5%, and apparent size deviation is more than 8%, and deviation of weight is more than 10%.
Distribution transforming stock parameter of the present invention, including, but not limited to wire gauge, coil turn and the number of plies, iron core diameter and cross sectional shape.
Distribution transforming of the present invention calculates data, including, but not limited to current density, load loss, short-circuit impedance, open circuit loss, no-load current, temperature rise, apparent size, weight data.
The present invention is when multiple criterion comprehensive descision, and conditional value is including, but not limited to described conditional value.
If the current density calculating gained is less than 1.5A/mm
2, then can judge that this wire is as aluminium material.
If the load loss calculating gained exceeds standard-required value or is greater than name plate rating 5%, short-circuit impedance exceeds standard-required scope or deviation is greater than 10% of name plate rating, then can think that this distribution transforming winding material is aluminium.
If calculating gained open circuit loss and no-load current exceed standard-required value or be greater than name plate rating 5%, then can think that this distribution transforming winding material is aluminium.
If calculate gained temperature rise to exceed standard-required value, then can think that this distribution transforming winding material is aluminium.
If calculate gained apparent size and name plate rating or actual measured value to differ by more than 8%, then can think that this distribution transforming winding material is aluminium.
If calculate the weight of gained and name plate rating or actual measured value to differ by more than 10%, then can think that this distribution transforming winding material is aluminium.
In sum, for improving the accuracy judged, should in conjunction with the determination methods comprehensive descision in the present invention when actual distribution transforming winding material discrimination.
The resistivity (75 DEG C) of copper is 2.135 × 10
-6Ω/cm, the resistivity (75 DEG C) of aluminium is 3.44 × 10
-6Ω/cm; The density of copper is 8.96g/cm
3, the density of aluminium is 2.70g/cm
3.The performance difference of copper and aluminum metal is large, therefore adopts the distribution transforming of copper and aluminum conductor will there are differences in outward appearance and performance.
General distribution transforming manufacturer can change iron core and winding data according to market in good time, when adopting aluminium winding, for ensureing that capacity of distribution transform meets the demands, need to increase iron core silicon-steel sheet, but the increase of siliconized plate must cause open circuit loss to increase; For guaranteed capacity and loss meet the demands, needing to reduce core section, increase coil turn, for ensureing that direct current resistance meets the demands, also needing to increase aluminum conductor sectional area, because aluminium density is little, distribution transforming will become " greatly ", become " gently ".Therefore, suppose that distribution transforming winding replaces copper conductor with identical aluminum conductor, the capacity of so distribution transforming can reduce, and open circuit loss and load loss become large; Suppose capacity, coil resistance, loss all meets the demands, distribution transforming winding increases for volume after copper with aluminium, and weight reduces.
When requiring that when calling for bid or purchasing distribution transforming the distribution transforming producer provides the wire gauge of purchased distribution transforming, coil parameter and core specification, according to principle of design and the experimental formula of distribution transforming, deduce out the distribution transforming parameter under established condition.Suppose that calculating distribution transforming Parameter and nameplate or actual measurement parameter has larger difference, then can think that the winding material of this distribution transforming is aluminium.
Below for three-phase three-column, double winding, layer-type winding, oil immersed type distribution transforming:
1. obtain distribution transforming parameter
Distribution transforming buy or bid time, outside the conventional technical parameter of removing requires, require that distribution transforming manufacturer marks length and the stock parameter such as wide, coil turn and the number of plies, iron core diameter and cross sectional shape of distribution transforming wire used.
2. winding Size calculation
As shown in Figure 1, according to the wire gauge got, winding parameter, calculate distribution transforming winding size.
Winding height: H
1=b × n × (n
1+ 1)+b+ δ, H
1for winding height (mm); B is diameter of wire or the width (mm) of tape insulation; n
1for every layer of number of turn; δ is coiling nargin (mm), tables look-up and can obtain;
Winding thickness: B
x=a × n' × n
1'+δ
1+ δ
2, B
xfor the radial thickness of winding (mm); A is diameter of wire or the thickness (mm) of tape insulation; The coil number of plies that n ' is oil duct side; δ
1for layer insulation total thickness (mm), table look-up and can obtain; δ
2for width is to coiling nargin (mm), tables look-up and can obtain;
3. core dimensions calculates
As shown in Figure 1, according to the core specification got and the winding size calculating gained, the core dimensions of distribution transforming is calculated.
Rule of thumb formula, calculates iron core diameter:
d is iron core diameter's size (cm); P ' is every column capacity (kVA); K is experience factor, tables look-up and can obtain.
Coil one turn voltage:
e
tfor coil one turn voltage (V); U
xfor coil phase voltage; W is umber of turn.
Magnetic flux density:
b is magnetic flux density (kilogauss); A
tfor the long-pending (cm of core section
2), table look-up can obtain according to iron core diameter.
Calculating gained iron core diameter and magnetic flux density can be used for checking data accuracy that manufacturer marks, and suppose that calculated diameter and magnetic flux density and core material are not inconsistent, then can think that iron core data are marked by manufacturer incorrect, require that the producer accurately provides.
Core center distance: M
0=(R
1+ δ
3+ B
xD+ δ
4+ B
xG) × 2+E, M
0be that two core center are apart from (mm); R
1for iron core radius (mm); δ
3low-voltage coil, to the distance (mm) of iron core, is tabled look-up and can be obtained; B
xDfor low-voltage coil width is to thickness (mm); δ
4for high-voltage coil and low-voltage coil spacing (mm), table look-up and can obtain; B
xGfor high-tension coil width is to thickness total thickness (mm); E is phase spacing (mm), tables look-up and can obtain;
Iron core window is high: H
0=H
1+ H
2+ E
x+ H
3+ δ
5, H
0for window high (mm); H
1for winding height overall (mm); H
2for cushion block is compressed rear height overall (mm); E
xfor static board and the oil duct sum (mm) by static board; H
3for thickness of compressive plate (mm); δ
5for pressing plate is to the space (mm) of upper yoke, tables look-up and can obtain;
4. wire parameter calculates
As shown in Figure 2, according to the wire gauge got and the winding size calculating gained, the correlation parameter of wire is calculated.
Current density:
j is current density (A/mm
2), I
xfor phase current (A), A
xfor wire total sectional area (mm
2).The current density calculating gained tentatively can judge lead material, if current density is less than 1.5A/mm
2, then can judge that this wire is as aluminium material.
Wire overall length: L
m=2 π R
xw
m, L
mfor wire overall length (m); R
xfor coil mean radius (m); W
mfor maximum tap is coil total number of turns.
Bare conductor weight: G
x=3L
ma
xg × 10
-3, G
xfor bare conductor weight (kg); A
xfor sectional area of wire (mm
2); G is wire density (g/cm
3);
Coil direct current resistance:
r
75 DEG Cfor direct current resistance (Ω) during 75 DEG C, wire; L
nfor wire during specified tap long (m); A
xfor sectional area of wire (mm
2); ρ
75 DEG Cfor resistance coefficient (the Ω mm that wire at 75 DEG C is
2/ m).
5. load loss and short-circuit impedance calculate
As shown in Figure 2, according to the coil resistance and the winding size that calculate gained, load loss and the short-circuit impedance of distribution transforming is calculated.
Coil resistance loss: P
x=3I
g 2r
75 DEG C, P
xfor coil resistance loss (W); I
gfor phase current (m); R
75 DEG Cfor the direct current resistance (Ω) during coil 75 DEG C;
Layer-type winding added losses: there is no accurate computing method, rule of thumb, at present by measure at the transformer of below 50kVA by coil resistance loss 3%, capacity at the transformer of 63kVA ~ 630kVA by 5% of coil resistance loss.Ohmic loss adds that added losses are the load loss of distribution transforming.
Short-circuit impedance:
u
kfor short-circuit impedance; u
krfor short-circuit impedance resistive component; u
kxfor short-circuit impedance reactive component.
Short-circuit impedance resistive component:
u
krfor short-circuit impedance resistive component; P
kit is the load loss (W) of 75 DEG C; P
nfor rated capacity (kVA).
Short-circuit impedance reactive component:
u
kxfor short-circuit impedance reactive component; F is frequency (Hz); I is rated current (A); Total number of turns when W is principal tapping; e
tfor every circle electromotive force (V/ circle); H is the average reactance height of coil; ρ is Rockwell coefficient; K is additional reactance coefficient, tables look-up and can obtain.Wherein:
a
1, a
2for the thickness (cm) of inner-outer coil; r
1, r
2for the mean radius (cm) of inner-outer coil; a
12for the thickness (cm) in the empty road of leakage field; r
12for the mean radius (cm) in the empty road of leakage field.
If the load loss calculating gained distribution transforming exceeds standard-required value or is greater than name plate rating 5%, short-circuit impedance exceeds standard-required scope or deviation is greater than 10% of name plate rating, then can think that this distribution transforming winding material is aluminium.
6. open circuit loss and no-load current calculate
As shown in Figure 3, according to the core dimensions calculating gained, open circuit loss and the no-load current of distribution transforming is calculated.
Iron core rod weight: G
f1=3 γ H
0a
t× 10
-4, iron core iron yoke weight: G
f2=4 γ M
0a
e× 10
-4+ G
0, G
f1for the weight (kg) of stem; G
f2for the weight (kg) of iron yoke; γ is siliconized plate density (g/cm3); H
0for window high (mm); M
0be that two core center are apart from (mm); A
tfor iron core column sectional area (cm
2); A
efor iron yoke sectional area (cm
2); G
0for angle heavy (kg).
Open circuit loss: P
0=K
1× (P
1g
f1+ P
2g
f2), P
0for open circuit loss (W); K
1for added losses coefficient; P
1for the specific loss (W/kg) of stem; P
2for the specific loss (W/kg) of iron yoke; G
f1for the weight (kg) of stem; G
f2for the weight (kg) of iron yoke.
No-load current real component:
i
oafor no-load current real component; P
0for open circuit loss (W); S
efor transformer rated capacity (kVA).
No-load current idle component:
i
obfor no-load current idle component; K
0for additional coefficient; G
firon core weight (kg); C is seam number; A
tiron core net sectional area (cm
2); S
efor transformer rated capacity (kVA); g
cfor the heavy exciting power (VA/kg) of unit iron; g
jfor seam unit area exciting power (VA/cm
2), table look-up and can obtain;
No-load current:
If calculating gained open circuit loss and no-load current exceed standard-required value or be greater than name plate rating 5%, then can think that this distribution transforming winding material is aluminium.
7. distribution transforming apparent size calculates
As shown in Figure 4, according to the core dimensions calculating gained, distribution transforming apparent size is calculated.
Fuel tank height: H=H
0+ 2H
e+ H
d+ H
x, H is fuel tank height (mm); H
0for iron core window high (mm); H
efor the most large stretch of wide (mm) of iron yoke; H
dfeet high (mm), tables look-up and can obtain; H
xiron core, to the distance (mm) of case lid, is tabled look-up and can be obtained.
Fuel tank width: B=D
g+ B
1, B is fuel tank width (mm); D
gfor exterior loop diameter (mm); B
1for high and low pressure side is to fuel tank space (mm), tables look-up and can obtain.
Fuel tank length: L=D
g+ 2M
0+ B
2, L is fuel tank length (mm); D
gfor exterior loop diameter (mm); M
0for iron core column centre distance (mm); B
2for long axis direction A/C phase exterior loop is to fuel tank space (mm), tables look-up and can obtain.
If calculate gained apparent size and name plate rating or actual measured value to differ by more than 8%, then can think that this distribution transforming winding material is aluminium.
8. temperature rise calculates
As shown in Figure 5, according to calculating the winding size of gained, distribution transforming size and loss, the temperature rise of distribution transforming is calculated.
Coil surface is to the average temperature rising of oil: T
x=K
xq
n+ K
jqn
j+ K
yq δ
y, T
xfor coil surface is to the average temperature rising (DEG C) of oil; K
xfor layer-type winding temperature rise coefficient, generally get 0.065; Q is the unit thermal load (W/m of coil surface
2), table look-up and can obtain; N is index, is determined by experiment, generally gets 0.8; K
jfor insulation correction coefficient, table look-up and can obtain; n
jfor total number of plies deducts oil duct number; K
yfor coil number of plies correction coefficient, table look-up and can obtain; δ
yadd turn-to-turn insulation for layer insulation is thick thick, table look-up and can obtain;
Self cooling or air-cooled distribution transforming oil top layer temperature rise: T
a=1.2T
y+ T
δ, T
afor oily top layer temperature rise (DEG C); T
ythe average temperature rising (DEG C) of oil to air, for self-cooled:
for air-cooled:
q
tfuel tank unit thermal load (W/m
2), table look-up and can obtain; T
δfor oil temperature rises modified value (DEG C), table look-up and can obtain.
If calculate gained temperature rise to exceed standard-required value, then can think that this distribution transforming winding material is aluminium.
9. distribution transforming Weight computation
As shown in Figure 6, according to calculating the winding size of gained, distribution transforming size and core dimensions, the weight of distribution transforming is calculated.
The device body oil extraction weight of copper winding distribution transforming:
the device body oil extraction weight of aluminium winding distribution transforming:
g
pyfor the oil extraction of device body heavy (kg); G
fefor siliconized plate heavy (kg); G
cufor the copper conductor heavy (kg) of tape insulation; G
alfor the aluminum conductor heavy (kg) of tape insulation.
Barrel type tank empty fuel tank charge of oil weight: G
ky=0.9HA
d, G
kyfor empty fuel tank charge of oil heavy (kg); H is barrel type tank height (dm); A
dfor fuel tank cross-sectional area (dm
2);
Total oil is heavy: G
y=G
ky-G
py+ G
sy, G
yfor total oil heavy (kg); G
kyempty fuel tank charge of oil heavy (kg); G
pyfor the oil extraction of device body heavy (kg); G
syin heating radiator, oil heavy (kg), tables look-up and can obtain;
Device body weight: G
q=K
q(G
fe+ G
r), G
qfor device body heavy (kg); K
qfor device body miscellany coefficient, full copper cash gets 1.15, and half bronze medal half aluminium gets 1.16, and full aluminium gets 1.2; G
fefor siliconized plate heavy (kg); G
rfor the wire heavy (kg) of tape insulation.
Flat-top fuel tank cap weight: G
g=7.85A
gδ
g, G
gfor fuel tank cap heavy (kg); 7.85 is steel plate proportion (kg/dm
3); A
gfor case lid area (dm
2); δ
gfor case lid thickness (dm).
Fuel tank gross weight: G
yx=1.15 × (7.85 × (A
gδ
g+ A
dδ
d+ l
bh
bδ
b)+G
s), G
yxfor fuel tank heavy (kg); 1.15 be coefficient; 7.85 is steel plate proportion (kg/dm3); Ag is case lid area (dm
2); δ
gfor case lid thickness (dm); A
dfor case floorage (dm
2); δ
dfor case base thickness degree (dm); I
bfor fuel tank girth (dm); H
bfor fuel tank height (dm); δ
bfor tank wall thickness (dm); G
sfor heatsink weight, table look-up and can obtain.
Distribution transforming gross weight: G=G
q+ G
yx+ G
y+ G
f, G is distribution transforming gross weight (kg); G
qfor device body heavy (kg); G
yxfor fuel tank heavy (kg); G
yfor oil heavy (kg); G
ffor annex heavy (kg), table look-up and can obtain.
If calculate the weight of gained distribution transforming and name plate rating or actual measured value to differ by more than 10%, then can think that this distribution transforming winding material is aluminium.
In sum, actual distribution transforming winding material discrimination is heavy can, in conjunction with the determination methods comprehensive descision in the present invention, be the accuracy that raising judges.
Content of the present invention is including, but not limited to above-described embodiment, and person skilled can propose other embodiment in guiding theory of the present invention, but this embodiment includes within the scope of the invention.
Claims (1)
1. the method for a distribution transforming winding material discrimination, it is characterized in that, from the design angle of distribution transforming, by obtaining the stock parameter of distribution transforming to be checked, and by design calculation, the distribution transforming obtained is calculated data and nameplate data or measured data contrast, if both deviations reach conditional value, then judge that this distribution transforming winding is aluminium material; Wherein, conditional value is: current density is less than 1.5A/mm
2, load loss exceeds standard value or name plate rating 5%, and short-circuit impedance deviation is more than 10%, and open circuit loss exceeds standard value or name plate rating 5%, and no-load current exceeds standard value or name plate rating 5%, and apparent size deviation is more than 8%, and deviation of weight is more than 10%.
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|---|---|---|---|
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663476.3A CN104483463A (en) | 2014-11-19 | 2014-11-19 | Method for identifying distribution transformer winding material |
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Family
ID=52758031
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158341A (en) * | 2015-09-18 | 2015-12-16 | 重庆大学 | Sound-speed-based method for identifying material of transformer winding |
| CN106404844A (en) * | 2016-08-26 | 2017-02-15 | 国网山东省电力公司高唐县供电公司 | Transformer winding material identification method |
| CN107192738A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer winding material |
| CN109164322A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司铁岭供电公司 | Dry-type distribution transformer winding coil material determination method and analytical equipment |
| CN113884778A (en) * | 2021-10-29 | 2022-01-04 | 浙江华电器材检测研究院有限公司 | Transformer winding parameter identification method based on high-frequency excitation |
-
2014
- 2014-11-19 CN CN201410663476.3A patent/CN104483463A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158341A (en) * | 2015-09-18 | 2015-12-16 | 重庆大学 | Sound-speed-based method for identifying material of transformer winding |
| CN105158341B (en) * | 2015-09-18 | 2018-05-25 | 重庆大学 | Transformer winding material discrimination method based on the velocity of sound |
| CN106404844A (en) * | 2016-08-26 | 2017-02-15 | 国网山东省电力公司高唐县供电公司 | Transformer winding material identification method |
| CN107192738A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer winding material |
| CN107192738B (en) * | 2017-07-19 | 2020-08-18 | 云南电网有限责任公司电力科学研究院 | Method and device for detecting material of distribution transformer winding |
| CN109164322A (en) * | 2018-09-21 | 2019-01-08 | 国网辽宁省电力有限公司铁岭供电公司 | Dry-type distribution transformer winding coil material determination method and analytical equipment |
| CN113884778A (en) * | 2021-10-29 | 2022-01-04 | 浙江华电器材检测研究院有限公司 | Transformer winding parameter identification method based on high-frequency excitation |
| CN113884778B (en) * | 2021-10-29 | 2024-04-05 | 浙江华电器材检测研究院有限公司 | Transformer winding parameter identification method based on high-frequency excitation |
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