CN107665768B - Oil injection method of oil-immersed transformer - Google Patents
Oil injection method of oil-immersed transformer Download PDFInfo
- Publication number
- CN107665768B CN107665768B CN201710748171.6A CN201710748171A CN107665768B CN 107665768 B CN107665768 B CN 107665768B CN 201710748171 A CN201710748171 A CN 201710748171A CN 107665768 B CN107665768 B CN 107665768B
- Authority
- CN
- China
- Prior art keywords
- oil
- transformer
- oil tank
- height
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
Developed by the inventionThe oil injection method of the oil-immersed transformer comprises the following steps: pre-oiling: calculating the volume of the transformer oil injected into the oil tank; pre-weighing and metering: calculating the temperature as T1Density rho of transformer oil at DEG C1(ii) a Establishing an oil density curve chart; oil injection metering: calculating the volume v of the transformer oil required to be injected when the temperature of the transformer oil is 70 ℃; and (3) operating oiling: and injecting transformer oil with the volume v into an oil tank of the oil-immersed transformer to be injected by using a vacuum pump. The automatic oiling device has the characteristics of high efficiency and accuracy in oiling, high automation degree and low labor cost.
Description
Technical Field
The invention relates to the field of transformer manufacturing, in particular to an oil injection method of an oil-immersed transformer.
Background
Oil-immersed transformer all needs the oiling, like the oil-immersed transformer on the market, generally all is that the manual work is on the completion of annotating or is on the manual work like filling station and jump the rifle to the oil gun and mend oil again, because oil density is different under the different temperatures, and the manual work is very difficult to hold in addition, so artifical oiling is inefficient, and the cost of labor is high, is difficult to realize automaticly.
Therefore, a scientific and efficient oil injection method needs to be developed.
Disclosure of Invention
The invention aims to provide an oil filling method of an oil-immersed transformer, which has the advantages of high efficiency and accuracy in oil filling, high automation degree and low labor cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
an oil injection method of an oil-immersed transformer comprises the following steps:
A) pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T1Transformer oil at deg.C; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler1Up to the air layer height h1In the range of 0-70 mm; calculating the volume of transformer oil injected into the oil tank based on the volume of the oil tank of the oil-immersed transformer and recording the volume;
B) pre-weighing and metering: weighing the oil tank of the oil-immersed transformer after pre-oiling, and changing the oil tank according to the oil immersed type before pre-oilingCalculating the weight of the transformer oil injected into the oil tank in the step A; based on the mass formula, the temperature is calculated to be T1Density rho of transformer oil at DEG C1And recording;
C) establishing an oil density curve chart: repeating the process of step A and step B n times, and recording the temperature TnHeight h of air layernAnd density ρ of the transformer oilnN is not less than 1 and is a constant; based on temperature TnAnd density ρ of the transformer oilnEstablishing an x-y plot of oil density, TnIn the range of 0-70 ℃;
D) oil injection metering: measuring the size of an oil tank of the oil-immersed transformer to be filled, and calculating the temperature T of the transformer oil according to the height of the air layer set by the oil-immersed transformer to be filledAt normal temperatureWhen the temperature is 70 ℃, the volume v of the transformer oil required to be injected is calculated according to the x-y curve graph of the oil density; t isAt normal temperatureIn the range of 0-70 ℃;
E) and (3) operating oiling: and injecting transformer oil with the volume v into an oil tank of the oil-immersed transformer to be injected by using a vacuum pump.
During vacuum oil injection, the temperature of transformer oil is often required to be heated to 70 ℃, and the temperature of transformer oil of an oil-immersed transformer is often at a normal temperature in daily use (the normal temperature depends on the working environment of the transformer). Based on the fact that the density of the transformer oil changes along with the temperature, the volume of the transformer oil with the same weight is different at different temperatures, therefore, in order to achieve accurate oil injection, the invention collects the density values of the transformer oil at different temperatures through two steps of pre-oil injection and pre-weighing measurement, and establishes an oil density curve table of the transformer oil according to the density values. When the oil is filled really, under the condition that the size of an oil tank of the oil-immersed transformer to be filled and the height of an air layer required by the process are known, a worker can know the volume of transformer oil required to be filled in the vacuum oil filling process based on an oil density curve table. The workman can realize accurate oiling with the flow control appearance of volume numerical value input vacuum oiling machine, and whole oiling process need not the manual work and waits, and the oiling operation is accomplished in the automation, can save a large amount of time.
Under the long-time operation, equipment or pipeline probably appear ageing condition, increase the hidden damage of oiling, for this, after step E accomplishes, can increase step F: observing the height of the oil level in the oil tank, and measuring the height from the oil level in the oil tank to the height of an air layer at the top of the oil tank in the step E by using a steel ruler; and if the measurement shows that the height of the air layer in the oil tank in the step E is not equal to the height of the air layer set by the oil-immersed transformer to be filled in the step D, supplementing and filling transformer oil with the temperature of 70 ℃ into the oil tank until the height of the air layer in the oil tank is equal to the height of the air layer set by the oil-immersed transformer to be filled in the step D. Meanwhile, in step F, recording the volume of the transformer oil which is additionally injected into the oil tank, and correcting an x-y curve chart of the oil density based on a mass formula. Therefore, even if the oil injection is hidden and damaged due to the aging of equipment or pipelines, workers can correct the x-y curve chart of the oil density according to the volume of the supplemented transformer oil. After the x-y curve diagram of the oil density is corrected, the x-y curve diagram of the oil density contains the hidden loss information of oil injection, and during the next operation, workers input the volume value of the transformer oil to be injected according to the x-y curve diagram of the oil density to realize accurate oil injection.
The corrected x-y curve of the oil density refers to that the temperature of the transformer oil at T is recalculated according to the volume of the supplemented transformer oilAt normal temperatureThe density of the transformer oil is information containing the hidden damage of oil filling caused by aging of equipment or pipelines.
The automatic oiling device has the characteristics of high efficiency and accuracy in oiling, high automation degree and low labor cost.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a transformer tank in embodiment 1 and embodiment 2 of the invention.
Description of reference numerals: 1-transformer oil; 2-box cover; and 3-oil tank.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1:
the oil-immersed transformer oil tank shown in fig. 1 is in a size of 1110mm in length; the width is 540 mm; the height is 700mm, and the oil injection method comprises the following steps:
A) pre-oiling for the first time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T1Transformer oil at 25 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler160 mm; calculating the volume of transformer oil injected into the oil tank to be 384L based on the volume of the oil tank of the oil-immersed transformer and recording;
B) first pre-weighing and metering: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step A to be 345kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T1At 25 ℃, the density of the transformer oil is ρ1Record at 0.9kg/dm 3;
C) pre-oiling for the second time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T2Transformer oil at a temperature below 4 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler269 mm; calculating the volume of transformer oil injected into the oil tank to be 379L and recording the volume based on the volume of the oil tank of the oil-immersed transformer;
D) and (3) pre-weighing and metering for the second time: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step C to be 340kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T2The density of the transformer oil is rho when the temperature is below 4 DEG C20.9122kg/dm3 and recorded;
E) pre-oiling for the third time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T35-14 ℃ transformer oil(ii) a In the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler366 mm; calculating the volume of transformer oil injected into the oil tank to be 380L based on the volume of the oil tank of the oil-immersed transformer and recording;
F) and (3) carrying out pre-weighing metering for the third time: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step E to be 342kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T3The density of the transformer oil is rho at 5-14 DEG C30.9078kg/dm3 and recorded;
G) fourth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T4Transformer oil with the temperature of 15-24 ℃ or below; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler463 mm; calculating the volume of transformer oil injected into the oil tank to be 382L and recording based on the volume of the oil tank of the oil-immersed transformer;
H) fourth pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step G to be 344kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T4The density of the transformer oil is rho when the temperature is below 15-24 DEG C40.9036kg/dm3 and recorded;
I) fifth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T5Transformer oil with the temperature of 26-35 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler557 mm; based on the volume of an oil tank of the oil-immersed transformer, calculating and recording the volume of transformer oil injected into the oil tank as 386L;
J) fifth pre-weighing: weighing the oil tank of the pre-filled oil-immersed transformerCalculating the weight of the transformer oil injected into the oil tank in the step I to be 347kg according to the weight of the oil tank of the oil-immersed transformer before pre-oil injection; based on the mass formula, the temperature is calculated to be T5At 26-35 ℃, the density of the transformer oil is rho50.8951kg/dm3 and recorded;
K) and (3) sixth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T6Transformer oil with the temperature of 36-40 ℃ or below; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler654 mm; calculating the volume of the transformer oil injected into the oil tank to be 388L based on the volume of the oil tank of the oil-immersed transformer and recording;
l) sixth pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step K to be 348kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T6The density of the transformer oil is rho when the temperature is below 36-40 DEG C6Record at 0.891kg/dm 3;
m) seventh pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T7Transformer oil at 70 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler740 mm; calculating the volume of transformer oil injected into the oil tank to be 384L based on the volume of the oil tank of the oil-immersed transformer and recording;
n) seventh pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step M to be 396kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T7At 70 ℃, the density of the transformer oil is ρ70.8721kg/dm3 and recorded;
o) establishing an oil density profile: respectively recording the injection of fuel into the fuel tank according to the calculation of the steps A to NTemperature T of transformer oil1～T7The height h from the oil level to the air layer at the top of the oil tank1～h6And density ρ of the transformer oil1～ρ7The values of (a) are shown in Table 1; and establishing an x-y curve diagram of the oil density, namely establishing the temperature of the transformer oil at TAt normal temperatureDensity profile of transformer oil at 25 ℃;
| temperature of | Air layer height mm | Oil tank width mm | Oil tank length mm | Height mm | Volume L | Oil weight kg | Density kg/dm3 | Volume L of oil injection |
| 4 or less | 69 | 540 | 1110 | 700 | 379 | 340 | 0.9122 | 373 |
| 14～5 | 66 | 540 | 1110 | 700 | 380 | 342 | 0.9078 | 377 |
| 24～15 | 63 | 540 | 1110 | 700 | 382 | 344 | 0.9036 | 381 |
| 25 | 60 | 540 | 1110 | 700 | 384 | 345 | 0.9 | 384 |
| 26～35 | 57 | 540 | 1110 | 700 | 386 | 347 | 0.8951 | 388 |
| 36～40 | 54 | 540 | 1110 | 700 | 388 | 348 | 0.891 | 391 |
| 70 | 40 | 540 | 1110 | 700 | 396 | 356 | 0.8721 | 409 |
TABLE 1
P) oil injection metering: measuring an oil tank of an oil-immersed transformer to be filled with oil, wherein the size of the oil tank is 1310mm in length; the width is 550 mm; the height is 730mm, the height of an air layer set by an oil-immersed transformer to be filled is 70mm, the weight and the volume of the transformer oil required to be filled are 428kg and 476L respectively when the temperature of the transformer oil is 25 ℃, and the volume V of the transformer oil required to be filled is 497L when the temperature of the transformer oil is 70 ℃ according to an x-y curve graph of oil density;
q) operating and oiling: injecting transformer oil with the volume of V497L into an oil tank of an oil-immersed transformer to be injected by using a vacuum pump, and then finishingAnd (7) oiling. When the temperature of the transformer oil returns to TAt normal temperatureThe height of the air layer from the level of the oil to the top of the tank was measured at 25 ℃ using a steel ruler to be 49 mm.
Example 2:
the difference between this embodiment 2 and embodiment 1 is that, in this embodiment 2, after the step of operating the oil injection, a step is added for correcting the possible aging condition of the equipment or the pipeline, and increasing the hidden loss of the oil injection, and the specific oil injection process is as follows:
A) pre-oiling for the first time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T1Transformer oil at 25 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler160 mm; calculating the volume of transformer oil injected into the oil tank to be 384L based on the volume of the oil tank of the oil-immersed transformer and recording;
B) first pre-weighing and metering: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step A to be 345kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T1At 25 ℃, the density of the transformer oil is ρ1Record at 0.9kg/dm 3;
C) pre-oiling for the second time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T2Transformer oil at a temperature below 4 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler269 mm; calculating the volume of transformer oil injected into the oil tank to be 379L and recording the volume based on the volume of the oil tank of the oil-immersed transformer;
D) and (3) pre-weighing and metering for the second time: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step C to be 340kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T2Density of transformer oil below 4 ℃Degree is rho20.9122kg/dm3 and recorded;
E) pre-oiling for the third time: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T3Transformer oil at 5-14 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler366 mm; calculating the volume of transformer oil injected into the oil tank to be 380L based on the volume of the oil tank of the oil-immersed transformer and recording;
F) and (3) carrying out pre-weighing metering for the third time: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step E to be 342kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T3The density of the transformer oil is rho at 5-14 DEG C30.9078kg/dm3 and recorded;
G) fourth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T4Transformer oil with the temperature of 15-24 ℃ or below; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler463 mm; calculating the volume of transformer oil injected into the oil tank to be 382L and recording based on the volume of the oil tank of the oil-immersed transformer;
H) fourth pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step G to be 344kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T4The density of the transformer oil is rho when the temperature is below 15-24 DEG C40.9036kg/dm3 and recorded;
I) fifth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T5Transformer oil with the temperature of 26-35 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler557 mm; based on oil-immersed transformerThe volume of the transformer oil injected into the oil tank is calculated to be 386L and recorded;
J) fifth pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step I to be 347kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T5At 26-35 ℃, the density of the transformer oil is rho50.8951kg/dm3 and recorded;
K) and (3) sixth pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T6Transformer oil with the temperature of 36-40 ℃ or below; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler654 mm; calculating the volume of the transformer oil injected into the oil tank to be 388L based on the volume of the oil tank of the oil-immersed transformer and recording;
l) sixth pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step K to be 348kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T6The density of the transformer oil is rho when the temperature is below 36-40 DEG C6Record at 0.891kg/dm 3;
m) seventh pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T7Transformer oil at 70 ℃; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler740 mm; calculating the volume of transformer oil injected into the oil tank to be 384L based on the volume of the oil tank of the oil-immersed transformer and recording;
n) seventh pre-weighing: weighing the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step M to be 396kg according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, calculate the temperature asT7At 70 ℃, the density of the transformer oil is ρ70.8721kg/dm3 and recorded;
o) establishing an oil density profile: respectively recording the temperature T of the transformer oil injected into the oil tank according to the calculation of the steps A to N1～T7The height h from the oil level to the air layer at the top of the oil tank1～h6And density ρ of the transformer oil1～ρ7The values of (a) are shown in Table 1; and establishing an x-y curve diagram of the oil density, namely establishing the temperature of the transformer oil at TAt normal temperatureDensity profile of transformer oil at 25 ℃;
| temperature of | Air layer height mm | Oil tank width mm | Oil tank length mm | Height mm | Volume L | Oil weight kg | Density kg/dm3 | Volume L of oil injection |
| 4 or less | 69 | 540 | 1110 | 700 | 379 | 340 | 0.9122 | 373 |
| 14～5 | 66 | 540 | 1110 | 700 | 380 | 342 | 0.9078 | 377 |
| 24～15 | 63 | 540 | 1110 | 700 | 382 | 344 | 0.9036 | 381 |
| 25 | 60 | 540 | 1110 | 700 | 384 | 345 | 0.9 | 384 |
| 26～35 | 57 | 540 | 1110 | 700 | 386 | 347 | 0.8951 | 388 |
| 36～40 | 54 | 540 | 1110 | 700 | 388 | 348 | 0.891 | 391 |
| 70 | 40 | 540 | 1110 | 700 | 396 | 356 | 0.8721 | 409 |
TABLE 1
P) oil injection metering: measuring an oil tank of an oil-immersed transformer to be filled with oil, wherein the size of the oil tank is 1310mm in length; the width is 550 mm; the height is 730mm, the height of an air layer set by an oil-immersed transformer to be filled is 70mm, the weight and the volume of the transformer oil required to be filled are 428kg and 476L respectively when the temperature of the transformer oil is 25 ℃, and the volume V of the transformer oil required to be filled is 497L when the temperature of the transformer oil is 70 ℃ according to an x-y curve graph of oil density;
q) operating and oiling: injecting variable pressure oil with the volume of V497L into an oil tank of an oil-immersed transformer to be filled with oil by using a vacuum pump;
r) observing the height of the oil level in the oil tank, and measuring the height from the oil level in the oil tank to the height of an air layer at the top of the oil tank in the step Q by using a steel ruler, wherein the height of the air layer is 70 mm; if the height of the air layer in the oil tank in the step R is not equal to the height of the air layer set by the oil-immersed transformer to be filled in the step Q by 70mm through measurement, the situation that the equipment or the pipeline is aged is avoided, the hidden damage of oil filling is avoided, and correction is not needed; if the measurement shows that the height of the air layer in the oil tank in the step R is not equal to the height of the air layer set by the oil-immersed transformer to be filled in the step Q by 70mm, supplementing and filling transformer oil with the temperature of 70 ℃ into the oil tank until the height of the air layer in the oil tank is equal to the height of the air layer set by the oil-immersed transformer to be filled in the step Q by 70 mm; meanwhile, recording the volume of the transformer oil which is additionally injected into the oil tank, and correcting the x-y curve chart of the oil density, namely the temperature of the transformer oil is TAt normal temperatureDensity profile of transformer oil at 25 ℃.
According to the oil injection method, the oil injection amount can be calculated during oil injection, the oil can be accurately transported by inputting the oil into the flow controller of the vacuum oil injection machine without manual waiting and oil supplement, and the time is saved. The automatic oiling is completed, and the automatic grade is improved.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or application to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (3)
1. An oil injection method of an oil-immersed transformer is characterized by comprising the following steps:
A) pre-oiling: the injection temperature of the vacuum pump into the oil tank of the oil-immersed transformer is T1Transformer oil at deg.C; in the process of oil injection, the height of the oil level in the oil tank is observed, and the height h from the oil level to the air layer at the top of the oil tank is measured by using a steel ruler1Up to the air layer height h1In the range of 0-70 mm; calculating the volume of transformer oil injected into the oil tank based on the volume of the oil tank of the oil-immersed transformer and recording the volume;
B) pre-weighing and metering: weighing the weight of the oil tank of the oil-immersed transformer after pre-oiling, and calculating the weight of the transformer oil injected into the oil tank in the step A according to the weight of the oil tank of the oil-immersed transformer before pre-oiling; based on the mass formula, the temperature is calculated to be T1Density rho of transformer oil at DEG C1And recording;
C) establishing an oil density curve chart: repeating the process of step A and step B n times, and recording the temperature TnHeight h of air layernAnd density ρ of the transformer oilnN is not less than 1 and is a constant; based on temperature TnAnd density ρ of the transformer oilnEstablishing an x-y plot of oil density, TnIn the range of 0-70 ℃;
D) oil injection metering: measuring the size of an oil tank of the oil-immersed transformer to be filled, and calculating the temperature T of the transformer oil according to the height of the air layer set by the oil-immersed transformer to be filledAt normal temperatureWhen the temperature is 70 ℃, the volume v of the transformer oil required to be injected is calculated according to the x-y curve graph of the oil density; t isAt normal temperatureIn the range of 0-70 ℃;
E) and (3) operating oiling: and injecting transformer oil with the volume v into an oil tank of the oil-immersed transformer to be injected by using a vacuum pump.
2. The oil filling method of the oil-filled transformer according to claim 1, wherein after the step E, a step F: observing the height of the oil level in the oil tank, and measuring the height from the oil level in the oil tank to the height of an air layer at the top of the oil tank in the step E by using a steel ruler; and if the measurement shows that the height of the air layer in the oil tank in the step E is not equal to the height of the air layer set by the oil-immersed transformer to be filled in the step D, supplementing and filling transformer oil with the temperature of 70 ℃ into the oil tank until the height of the air layer in the oil tank is equal to the height of the air layer set by the oil-immersed transformer to be filled in the step D.
3. The oil filling method of an oil filled transformer according to claim 2, wherein in step F, the volume of the transformer oil which is additionally filled into the oil tank is recorded, and the x-y curve of the oil density is corrected based on a mass formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748171.6A CN107665768B (en) | 2017-08-28 | 2017-08-28 | Oil injection method of oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710748171.6A CN107665768B (en) | 2017-08-28 | 2017-08-28 | Oil injection method of oil-immersed transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107665768A CN107665768A (en) | 2018-02-06 |
| CN107665768B true CN107665768B (en) | 2021-01-01 |
Family
ID=61098268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710748171.6A Active CN107665768B (en) | 2017-08-28 | 2017-08-28 | Oil injection method of oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107665768B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568764A (en) * | 2012-02-01 | 2012-07-11 | 宁波奥克斯高科技有限公司 | Oil injection method for oil immersion type transformers |
| CN203132642U (en) * | 2013-03-30 | 2013-08-14 | 国家电网公司 | Portable oil level detection tool for transformer |
| CN106024317A (en) * | 2016-08-10 | 2016-10-12 | 青海送变电工程公司 | High-voltage-class insulating oil purification treatment device and treatment method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005302794A (en) * | 2004-04-07 | 2005-10-27 | Hitachi Industrial Equipment Systems Co Ltd | Transformer monitoring system |
-
2017
- 2017-08-28 CN CN201710748171.6A patent/CN107665768B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568764A (en) * | 2012-02-01 | 2012-07-11 | 宁波奥克斯高科技有限公司 | Oil injection method for oil immersion type transformers |
| CN203132642U (en) * | 2013-03-30 | 2013-08-14 | 国家电网公司 | Portable oil level detection tool for transformer |
| CN106024317A (en) * | 2016-08-10 | 2016-10-12 | 青海送变电工程公司 | High-voltage-class insulating oil purification treatment device and treatment method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107665768A (en) | 2018-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102644736B (en) | Oil mass measuring method and oil mass measuring device | |
| CN103629341A (en) | Wet-type double-clutch automatic transmission electromagnetic valve characteristic curve compensation method | |
| CN105300699B (en) | A kind of assessment method of motor power transient performance | |
| CN110553152B (en) | Pressure maintaining detection method and system for gas conveying pipe network | |
| CN107665768B (en) | Oil injection method of oil-immersed transformer | |
| CN111339615A (en) | Aircraft fuel tank gravity center calculation and compensation method based on two-step interpolation | |
| CN105547420A (en) | Ultrasonic fuel meter flow point coefficient correcting device and method | |
| CN113485466B (en) | Proportional valve control method, proportional valve control device, computer equipment and readable storage medium | |
| CN105571873A (en) | Dual-opposed two-stroke engine external characteristic calibration method | |
| RU2017128802A (en) | VEHICLE FILLING OPERATIONS OPERATIONS | |
| CN104807953A (en) | Method for rapidly detecting engine oil dilution rate | |
| CN111912761B (en) | Method for accurately representing oil-water phase permeability relation curve in ultra-high water-cut period | |
| CN112065700B (en) | Torque control method for compressor and storage medium | |
| CN112096532B (en) | Method and system for limiting fuel injection quantity | |
| CN116679218A (en) | Compensation correction method for lithium ion battery capacity | |
| EP3152531B1 (en) | Level gauge featuring propagation time correction | |
| CN112255138B (en) | Inspection and maintenance method for special fire extinguishing agent concentration measurement system | |
| CN104123459A (en) | Circuit semi-accommodation parameter estimation method based on reactive loss deviation | |
| CN102393631B (en) | Lubricating oil temperature control system based on fuzzy control | |
| CN205300712U (en) | Ultrasonic wave gas surface low volume point coefficient correcting unit | |
| CN112163729A (en) | Process capability analysis method based on supply product truncation normal distribution quality data | |
| CN103206313A (en) | Method and system for controlling oil injection quantity of engine | |
| CN104121127B (en) | The defining method of fuel oil injector amount compensate for reference operating mode point | |
| CN106908197B (en) | A kind of pressure gauge temperature drift calibration bearing calibration | |
| CN103266880B (en) | A kind of oil well load measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.15 Shunjing Avenue, B District, Lishui hegui Industrial Zone, Nanhai District, Foshan City, Guangdong Province, 528200 Patentee after: Foshan Zhongyan Magnetoelectric Technology Co.,Ltd. Address before: No.15 Shunjing Avenue, B District, Lishui hegui Industrial Zone, Nanhai District, Foshan City, Guangdong Province, 528200 Patentee before: FOSHAN ZHONGYAN AMORPHOUS TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |