CN109060180A - The data processing method of oil-immersed transformer hot spot temperature of winding - Google Patents
The data processing method of oil-immersed transformer hot spot temperature of winding Download PDFInfo
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Abstract
The present invention provides the data processing method of oil-immersed transformer hot spot temperature of winding, and hot(test)-spot temperature calculated value is calculated in the second calculation formula of hot(test)-spot temperature when which includes: the first calculation formula of hot(test)-spot temperature or hot(test)-spot temperature reduction when being increased according to hot(test)-spot temperature；The hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value, change the characterisitic parameter of transformer in first calculation formula and second calculation formula according to comparison result so that the hot(test)-spot temperature calculated value is equal with the hot(test)-spot temperature measured value or be in the hot(test)-spot temperature calculated value and the difference of the hot(test)-spot temperature measured value in setting range value, thus the calculation formula after being adjusted.The present invention considers environment temperature, load current to the Transient State Influence of hot(test)-spot temperature, and the hot(test)-spot temperature that may make dynamic to be calculated is closer to true value.
Description
Technical field
The present invention relates to the data processings of transformer, the in particular to data processing of oil-immersed transformer hot spot temperature of winding
Method.
Background technique
The winding temperature gage that traditional oil-immersed transformer uses is using " thermal simulation method ", by the top layer easily measured
On the basis of oil temperature, then apply the additional temperature rise of a transformer load curent change, thus sum of the two, that is, analog transformation
The hot spot temperature of winding (temperature of the hottest point in winding) of device.The product is because error increases after operation a period of time, and deposits
In security risk, disabled in French power grid.
The method that hot(test)-spot temperature is directly measured using fiber plant can accurately measure hot(test)-spot temperature, but since optical fiber is set
Standby the price is very expensive, is not suitable for applying in oil-immersed transformer.
Indirect calculating method is the hot(test)-spot temperature based on the direct calculating transformer winding of hot(test)-spot temperature calculation formula.GB/T
Section 8.2 of 1094.7-2008 (corresponding to IEC60076-7:2005) gives hot under the environment temperature and loading condition of variation
Point temperature computation formula, but had certain problems in the formula, also it is worth discussion, research achievement is in Chinese electrical engineering
It is delivered in association's nd Annual Meeting " discussion to transient state hot spot temperature computation in oil-immersed power transformer in GB 1094.7 ".It should
Paper is corrected formula.But in actual usage scenario, China also mainly uses thermal simulation method.
Summary of the invention
The present invention is based on revised hot(test)-spot temperature calculation formula, propose the data of oil-immersed transformer hot spot temperature of winding
Processing method makes the hot(test)-spot temperature being calculated closer to true value.
In order to solve the above technical problems, the invention adopts the following technical scheme:
The data processing method of oil-immersed transformer hot spot temperature of winding, comprising:
Hot(test)-spot temperature when the first calculation formula of hot(test)-spot temperature when being increased according to hot(test)-spot temperature or hot(test)-spot temperature reduce the
Hot(test)-spot temperature calculated value is calculated in two calculation formula；
The hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value, changes described first according to comparison result
The characterisitic parameter of transformer is so that the hot(test)-spot temperature calculated value and the hot spot in calculation formula and second calculation formula
Temperature measured value is equal or the hot(test)-spot temperature calculated value and the difference of the hot(test)-spot temperature measured value is made to be in setting range
In value, thus the calculation formula after being adjusted；
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein,
θhIt (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiWhen to start
Gradient of the top-oil temperature to environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot spot temperature when to start
The gradient to top-oil temperature is spent, R is the ratio of load loss and no-load loss under rated current, and K is load factor, and H is hot spot
Coefficient, grFor gradient of the winding mean temperature to oily mean temperature, g under rated currentrThat is copper oil temperature is poor, and x is total losses to top layer
The exponential depth that oil temperature rises, y are exponential depth of the electric current to winding temperature rise, function f1(t) it indicates to press top-oil temperature liter when steady-state value is 1
Relative increase, function f2(t) indicate to press relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13
(t) relative reduction amount of the top-oil temperature to environment temperature gradient, function f when total decreasing value is 1 are indicated4(t) indicating total reduces
For hot spot to the relative reduction amount of top-oil temperature degree gradient, e is natural constant, τ when value is 1wFor the thermal time constant of winding, τ0For
Average oil time constant, k11、k21And k22For the thermal characteristics constant of transformer.
In some preferred embodiments, the hot(test)-spot temperature measured value utilizes fiber plant by transformer test
Measurement obtains or when off-test is obtained by resistance measurement；If passing through optical fibre measuring method using fiber plant
Obtain hot(test)-spot temperature measured value；If using electric-resistivity method, using temperature rise test at the end of the temperature value that measures as hot spot
Temperature measured value.
In some preferred embodiments, the hot(test)-spot temperature for measuring the transformer winding obtains the hot(test)-spot temperature
Measured value.
In some preferred embodiments, further includes:
The hot(test)-spot temperature calculated value and the hot(test)-spot temperature measured value of different moments of different moments are obtained, the different moments
Hot(test)-spot temperature calculated value is calculated by first calculation formula and second calculation formula；
The hot(test)-spot temperature calculated value of the different moments is compared with the hot(test)-spot temperature measured value of the different moments,
The characterisitic parameter for changing transformer in first calculation formula and second calculation formula according to comparison result, so that described
The hot(test)-spot temperature calculated value of different moments and the hot(test)-spot temperature measured value of the different moments are corresponding equal, or make it is described not
Hot(test)-spot temperature calculated value in the same time is also corresponding in setting model with the difference of the hot(test)-spot temperature measured value of the different moments
It encloses in value, thus the formula after being adjusted.
In further preferred embodiment, further includes: measure the hot spot temperature of the different moments of the transformer winding
Degree, obtains the hot(test)-spot temperature measured value of the different moments.
In some preferred embodiments, first calculation formula of hot(test)-spot temperature when being increased according to hot(test)-spot temperature or
It includes: the outer of measuring transformer that hot(test)-spot temperature calculated value, which is calculated, in the second calculation formula of hot(test)-spot temperature when hot(test)-spot temperature reduces
The load current value of portion's environment temperature, the top-oil temperature of transformer and transformer.
In some preferred embodiments, further includes: GB/T 1094.7-2008 is to transformer according to national standards
The selection requirement of characterisitic parameter, primarily determines the initial value of the characterisitic parameter of the transformer.
In some preferred embodiments, the characterisitic parameter of the transformer includes k11、k21、k22、x、y、H、τ0And τw。
In some preferred embodiments, further includes: update calculation formula adjusted into calculating equipment.
On the other hand, it the present invention also provides a kind of computer readable storage medium, is stored with and calculates in conjunction with equipment
The computer program used, the computer program are executed by processor to realize above-mentioned data processing method.
Compared with prior art, the beneficial effects of the present invention are as follows:
Hot spot temperature of winding is calculated by the measurement of environment temperature, top-oil temperature to transformer and the input of load current
And be compared with hot(test)-spot temperature measured value, the characterisitic parameter of transformer is corrected, so that calculated result is matched with true value, is considered
Environment temperature, load current are to the Transient State Influence of hot(test)-spot temperature, and the hot(test)-spot temperature that may make dynamic to be calculated is closer to true
Real value.
Detailed description of the invention
Fig. 1 is the flow chart of the data processing method of oil-immersed transformer hot spot temperature of winding of the invention.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
The data processing method of oil-immersed transformer hot spot temperature of winding of the invention can be applied in each scene, such as
Calibration for measuring instrument itself, design or configuration for calibrating other measuring instruments, for transformer.It, should with reference to Fig. 1
Data processing method includes step S1 and step S2.
Step S1, hot spot when the first calculation formula of hot(test)-spot temperature and hot(test)-spot temperature when being increased according to hot(test)-spot temperature reduce
Hot(test)-spot temperature calculated value is calculated in two calculation formula of temperature control；
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein,
θhIt (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiWhen to start
Gradient of the top-oil temperature to environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot spot temperature when to start
The gradient to top-oil temperature is spent, R is the ratio of load loss and no-load loss under rated current, and K is load factor (load electricity
Stream/rated current), H is hot spot coefficient, grIt is winding mean temperature under rated current to the ladder of oily mean temperature (in fuel tank)
Degree, grThat is copper oil temperature is poor, and x is the exponential depth (oily index) that total losses rise top-oil temperature, and y is index of the electric current to winding temperature rise
Power (around class index), function f1(t) it indicates to press the relative increase that top-oil temperature rises when steady-state value is 1, function f2(t) it indicates to press
Relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13(t) top layer oil when total decreasing value is 1 is indicated
Relative reduction amount of the temperature to environment temperature gradient, function f4(t) indicate that hot spot is to top-oil temperature degree gradient when total decreasing value is 1
Relative reduction amount, e are natural constant, τwFor the thermal time constant of winding, τ0For average oily time constant, k11、k21And k22To become
The thermal characteristics constant of depressor.Wherein x and y can be by tabling look-up to obtain.The characterisitic parameter of transformer includes k11、k21、k22、x、y、H、
τ0And τw。
Specifically, obtaining basic concept, these physical quantitys include the external environment of the top-oil temperature of transformer, transformer
The load current value of temperature and transformer.These physical quantitys can (hereinafter referred to as " be by the system of operation data processing method
System ") by measurement obtain, then step S1 just include the ambient temperature of measuring transformer, transformer top-oil temperature and
The load current value of transformer；Or system is sent to after can also obtaining by other device measurings；Alternatively, above-mentioned parameter
It is achieved other ways.System is calculated using above-mentioned physical quantity as the input of the first calculation formula or the second calculation formula
Obtain hot(test)-spot temperature calculated value.Specifically, calculating hot(test)-spot temperature calculated value according to the first calculation formula when hot(test)-spot temperature increases；
When hot(test)-spot temperature reduces, hot(test)-spot temperature calculated value is calculated according to the second calculation formula.
Step S2, hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value, changes first according to comparison result
The characterisitic parameter of transformer is so that hot(test)-spot temperature calculated value and hot(test)-spot temperature measured value phase in calculation formula and the second calculation formula
Deng or be in hot(test)-spot temperature calculated value and the difference of hot(test)-spot temperature measured value in setting range value, thus after being adjusted
First calculation formula and the second calculation formula.
Hot(test)-spot temperature calculated value is obtained by step S1.Hot(test)-spot temperature measured value can be passed through transformer test by system, such as
Temperature rise test etc., is obtained using fiber plant measurement or when off-test is obtained by resistance measurement；If utilizing optical fiber
Equipment then obtains hot(test)-spot temperature measured value by optical fibre measuring method；If will be surveyed at the end of temperature rise test using electric-resistivity method
The temperature value measured is as hot(test)-spot temperature measured value；Specific measurement method please refers to standard GB/T/T 1094.7-2008,
So step S2 also just further includes the hot(test)-spot temperature of measuring transformer winding, obtains hot(test)-spot temperature measured value；Hot(test)-spot temperature actual measurement
Value is sent to system after can also being obtained by other device measurings.
Due to the influence of various factors, after equipment runs a period of time, hot(test)-spot temperature calculated value and hot(test)-spot temperature measured value
It will appear difference.System obtains difference after being compared, system changes the first calculation formula and second according to the difference and calculates
The characterisitic parameter of transformer is so that hot(test)-spot temperature calculated value is equal with hot(test)-spot temperature measured value, or makes hot(test)-spot temperature meter in formula
Calculation value and the difference of hot(test)-spot temperature measured value are in such as ± 0.1% in setting range value, be can be obtained adjusted first and are calculated
Formula and the second calculation formula, hot(test)-spot temperature measured value here, which can be, obtains hot(test)-spot temperature actual measurement by optical fibre measuring method
Value is also possible to using the electric-resistivity method temperature value that measurement obtains at the end of temperature rise test.Adjust the first calculation formula of front and back
It is that at least a part of difference of characterisitic parameter of the transformer of the two namely system change transformer with the difference of the second calculation formula
Characterisitic parameter in one or more.System is subsequent to be counted according to the first calculation formula adjusted and the second calculation formula
Calculate hot(test)-spot temperature.
Certainly, in the scene for calibrating other measuring instruments, system is communicated with measuring instrument, and system will be adjusted
First calculation formula and the second calculation formula are updated to calculating in equipment namely measuring instrument, measuring instrument it is subsequent according to adjustment after
The first calculation formula and second calculation formula calculate hot(test)-spot temperature.
The design of such as transformer in some scenes, need first according to national standards GB/T1094.7-2008 to transformer
Characterisitic parameter selection requirement, primarily determine the initial value of the characterisitic parameter of transformer, then execute above-mentioned steps S1 and S2.
As described above, the present invention passes through the measurement of environment temperature, top-oil temperature to transformer and load current
Input calculates hot spot temperature of winding and is compared with hot(test)-spot temperature measured value, corrects relevant parameter (the characteristic ginseng of transformer
Number) so that calculated result is matched with true value, it is contemplated that environment temperature, load current can make the Transient State Influence of hot(test)-spot temperature
The hot(test)-spot temperature that dynamically be calculated closer to true value.
The present invention can also be achieved:
Since the temperature of hot spot (hottest point of winding) changes over time, the hot spot temperature of different moments can get
Spend the hot(test)-spot temperature measured value of calculated value and different moments, the hot(test)-spot temperature calculated values of different moments is by the first calculation formula or the
Two calculation formula are calculated, and the basic concept of different moments measured is inputted the first calculation formula and second and calculates public affairs
The hot(test)-spot temperature calculated value of different moments can be obtained in formula.For the hot(test)-spot temperature measured value of different moments, measurement can be passed through
The hot(test)-spot temperature of the different moments of transformer winding, for example measured using optical fibre measuring method, to obtain different moments
Hot(test)-spot temperature measured value.
In this way, the hot(test)-spot temperature calculated value of different moments can be compared with the hot(test)-spot temperature measured value of different moments,
The characterisitic parameter for changing transformer in the first calculation formula and the second calculation formula according to comparison result, so that the heat of different moments
Point temperature calculations and the hot(test)-spot temperature measured value of different moments are corresponding equal, or calculate the hot(test)-spot temperature of different moments
Value with the difference of the hot(test)-spot temperature measured value of different moments is also corresponding is in setting range value, thus the after being adjusted
One calculation formula and the second calculation formula.System is subsequent to be calculated according to the first calculation formula adjusted and the second calculation formula
Hot(test)-spot temperature.It is such to be advantageous in that, the hot(test)-spot temperature being calculated can be made closer to true value.
On the other hand, it the present invention also provides a kind of computer readable storage medium, is stored with and calculates in conjunction with equipment
The computer program used, the computer program are executed by processor to realize above-mentioned data processing method.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (10)
1. the data processing method of oil-immersed transformer hot spot temperature of winding, characterized by comprising:
Hot(test)-spot temperature second when the first calculation formula of hot(test)-spot temperature or hot(test)-spot temperature when being increased according to hot(test)-spot temperature reduce is counted
It calculates formula and hot(test)-spot temperature calculated value is calculated；
The hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value, changes described first according to comparison result and calculates
The characterisitic parameter of transformer is so that the hot(test)-spot temperature calculated value and the hot(test)-spot temperature in formula and second calculation formula
Measured value is equal or is in the hot(test)-spot temperature calculated value and the difference of the hot(test)-spot temperature measured value in setting range value,
Thus the calculation formula after being adjusted；
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein,
θhIt (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiTop layer when to start
Gradient of the oil temperature to environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot(test)-spot temperature when to start is to top
The gradient of layer oil temperature, R are the ratio of load loss and no-load loss under rated current, and K is load factor, and H is hot spot coefficient, gr
For gradient of the winding mean temperature to oily mean temperature, g under rated currentrThat is copper oil temperature is poor, and x is total losses to top-oil temperature liter
Exponential depth, y be exponential depth of the electric current to winding temperature rise, function f1(t) indicate by steady-state value be 1 when top-oil temperature rise it is opposite
Incrementss, function f2(t) indicate to press relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13(t) table
Show relative reduction amount of the top-oil temperature to environment temperature gradient, function f when total decreasing value is 14(t) indicate that total decreasing value is 1
When hot spot to the relative reduction amount of top-oil temperature degree gradient, e is natural constant, τwFor the thermal time constant of winding, τ0For average oil
Time constant, k11、k21And k22For the thermal characteristics constant of transformer.
2. data processing method according to claim 1, it is characterised in that: the hot(test)-spot temperature measured value passes through transformer
Test, is obtained using fiber plant measurement or when off-test is obtained by resistance measurement；If using fiber plant,
Hot(test)-spot temperature measured value is obtained by optical fibre measuring method；If measurement at the end of temperature rise test obtained using electric-resistivity method
Temperature value as hot(test)-spot temperature measured value.
3. data processing method according to claim 1, it is characterised in that further include: measure the heat of the transformer winding
Point temperature, obtains the hot(test)-spot temperature measured value.
4. data processing method according to claim 1, it is characterised in that further include:
Obtain the hot(test)-spot temperature calculated value and the hot(test)-spot temperature measured value of different moments of different moments, the hot spot of the different moments
Temperature calculations are calculated by first calculation formula and second calculation formula；
The hot(test)-spot temperature calculated value of the different moments is compared with the hot(test)-spot temperature measured value of the different moments, according to
Comparison result changes the characterisitic parameter of transformer in first calculation formula and second calculation formula, so that the difference
The hot(test)-spot temperature calculated value at moment and the hot(test)-spot temperature measured value of the different moments are corresponding equal, or make it is described difference when
The difference of the hot(test)-spot temperature measured value of the hot(test)-spot temperature calculated value and different moments at quarter is also corresponding to be in setting range value
It is interior, thus the formula after being adjusted.
5. data processing method according to claim 4, it is characterised in that further include: measure the transformer winding not
Hot(test)-spot temperature in the same time obtains the hot(test)-spot temperature measured value of the different moments.
6. data processing method according to claim 1, it is characterised in that hot spot when being increased according to hot(test)-spot temperature
Hot(test)-spot temperature calculated value is calculated in the second calculation formula of hot(test)-spot temperature when one calculation formula of temperature control or hot(test)-spot temperature reduce
It include: the load current value of the ambient temperature of measuring transformer, the top-oil temperature of transformer and transformer.
7. data processing method according to claim 1, it is characterised in that further include: GB/T according to national standards
Selection requirement of the 1094.7-2008 to the characterisitic parameter of transformer, primarily determines the initial value of the characterisitic parameter of the transformer.
8. data processing method according to claim 1, it is characterised in that: the characterisitic parameter of the transformer includes k11、
k21、k22、x、y、H、τ0And τw。
9. data processing method according to any one of claims 1 to 8, it is characterised in that further include: by meter adjusted
Formula is calculated to update into calculating equipment.
10. a kind of computer readable storage medium is stored with the computer program being used in combination with calculating equipment, the calculating
Machine program is executed by processor to realize any one of claim 1-9 data processing method.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596926A (en) * | 2018-12-30 | 2019-04-09 | 国网北京市电力公司 | The modification method and device of transformer test temperature |
| CN110991123A (en) * | 2019-11-26 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Transformer winding hot spot transient temperature calculation method based on L-M algorithm optimization |
| CN111831025A (en) * | 2019-04-19 | 2020-10-27 | 宁波奥克斯高科技有限公司 | Oil temperature control method of transformer and transformer using same |
| CN116432406A (en) * | 2023-03-09 | 2023-07-14 | 广东电网有限责任公司佛山供电局 | Method and device for calculating hot spot temperature of working winding of oil immersed transformer |
| CN117589334A (en) * | 2024-01-19 | 2024-02-23 | 湖南华夏特变股份有限公司 | Hot spot temperature detection method and system for oil immersed transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11337417A (en) * | 1998-05-26 | 1999-12-10 | Toshiba Fa Syst Eng Corp | Electrical machinery and apparatus |
| CN103324215A (en) * | 2013-05-17 | 2013-09-25 | 郑州华力信息技术有限公司 | Method for setting up thermal circuit model used for transformer load intelligent management system |
| CN104036125A (en) * | 2014-05-30 | 2014-09-10 | 河北省电力建设调整试验所 | Method for accurately calculating temperature field in oil-immersed transformer |
| CN104236754A (en) * | 2014-08-21 | 2014-12-24 | 国家电网公司 | Oil-immersed transformer winding hot-spot temperature monitoring method based on tank wall temperature |
| CN106653342A (en) * | 2016-12-02 | 2017-05-10 | 国网四川省电力公司电力科学研究院 | Oil-immersed transformer for uniform high temperature insulation system and structure optimization method thereof |
-
2018
- 2018-07-16 CN CN201810778921.9A patent/CN109060180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11337417A (en) * | 1998-05-26 | 1999-12-10 | Toshiba Fa Syst Eng Corp | Electrical machinery and apparatus |
| CN103324215A (en) * | 2013-05-17 | 2013-09-25 | 郑州华力信息技术有限公司 | Method for setting up thermal circuit model used for transformer load intelligent management system |
| CN104036125A (en) * | 2014-05-30 | 2014-09-10 | 河北省电力建设调整试验所 | Method for accurately calculating temperature field in oil-immersed transformer |
| CN104236754A (en) * | 2014-08-21 | 2014-12-24 | 国家电网公司 | Oil-immersed transformer winding hot-spot temperature monitoring method based on tank wall temperature |
| CN106653342A (en) * | 2016-12-02 | 2017-05-10 | 国网四川省电力公司电力科学研究院 | Oil-immersed transformer for uniform high temperature insulation system and structure optimization method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 侯丹等: ""对GB1094.7中油浸式电力变压器内暂态热点温度计算的商榷"", 《豆丁建筑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596926A (en) * | 2018-12-30 | 2019-04-09 | 国网北京市电力公司 | The modification method and device of transformer test temperature |
| CN111831025A (en) * | 2019-04-19 | 2020-10-27 | 宁波奥克斯高科技有限公司 | Oil temperature control method of transformer and transformer using same |
| CN110991123A (en) * | 2019-11-26 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Transformer winding hot spot transient temperature calculation method based on L-M algorithm optimization |
| CN116432406A (en) * | 2023-03-09 | 2023-07-14 | 广东电网有限责任公司佛山供电局 | Method and device for calculating hot spot temperature of working winding of oil immersed transformer |
| CN116432406B (en) * | 2023-03-09 | 2024-02-02 | 广东电网有限责任公司佛山供电局 | Method and device for calculating hot spot temperature of working winding of oil immersed transformer |
| CN117589334A (en) * | 2024-01-19 | 2024-02-23 | 湖南华夏特变股份有限公司 | Hot spot temperature detection method and system for oil immersed transformer |
| CN117589334B (en) * | 2024-01-19 | 2024-03-26 | 湖南华夏特变股份有限公司 | Hot spot temperature detection method and system for oil immersed transformer |
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Application publication date: 20181221 |