CN109255192A - A kind of emulated computation method of Transformer Winding Temperature Rise characteristic - Google Patents
A kind of emulated computation method of Transformer Winding Temperature Rise characteristic Download PDFInfo
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- CN109255192A CN109255192A CN201811104968.3A CN201811104968A CN109255192A CN 109255192 A CN109255192 A CN 109255192A CN 201811104968 A CN201811104968 A CN 201811104968A CN 109255192 A CN109255192 A CN 109255192A
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- 238000004804 winding Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 230000004907 flux Effects 0.000 claims description 12
- 230000002457 bidirectional effect Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 238000004422 calculation algorithm Methods 0.000 claims description 4
- 238000013178 mathematical model Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 239000002828 fuel tank Substances 0.000 description 8
- 238000009413 insulation Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Abstract
The invention discloses a kind of emulated computation methods of Transformer Winding Temperature Rise characteristic, it is based on FInite Element, hydrodynamics and numerical heat transfer, and the emulated computation method of oil-immersed power transformer coiling hotspot temperature rise is proposed using temperature-fluid field coupling mathematical calculation model using ANSYS Fluent software.
Description
Technical field
The present invention relates to simulation technical field more particularly to a kind of emulated computation methods of Transformer Winding Temperature Rise characteristic.
Background technique
Power transformer is one of electrical equipment important in power transmission, and reliability transports the safety of electric system
Row has a very important role.When Winding in Power Transformer temperature rise exceeds national regulations limit value, oil-impregnated paper insulation is at 80 DEG C
Within the scope of~140 DEG C, the every raising 6K insulation ag(e)ing rate of hot(test)-spot temperature will be doubled.Temperature rise is excessively high to make insulating materials old in advance
Change and reduce insulation performance, shorten the working life, and then influences the efficiency and normal operation of power transformer.Therefore, quantitative, quasi-
The temperature characteristic of true calculating transformer is necessary.
However, since the calculating of the components such as transformer winding and oil stream temperature rise is a multidisciplinary problem, and transformer
Structure it is more complex, the factor for influencing heat transfer is more, therefore has to the calculating of power transformer interior point temperature rise certain
Difficulty.
Currently, what most domestic scholar was recommended using GB/T15164-94 " oil-immersed power transformer load directive/guide "
Hot(test)-spot temperature calculation method assesses transformer temperature characteristic, but this method is deposited with 140 DEG C of hot spot temperature of winding for constraint condition
In following problems: 1) having ignored influence of the flow field to temperature characteristic of transformer oil in power transformer；2) in assessment transformer
When temperature characteristic, fails to assess the temperature characteristic under dynamic load, be unfavorable for practical application.
Summary of the invention
For overcome the deficiencies in the prior art, technical problem solved by the invention is to provide a kind of Transformer Winding Temperature Rise
The emulated computation method of characteristic based on FInite Element, hydrodynamics and numerical heat transfer, and utilizes ANSYS Fluent
Software proposes the imitative of oil-immersed power transformer coiling hotspot temperature rise using temperature-fluid field coupling mathematical calculation model
True calculation method.
In order to solve the above technical problems, the technical solution adopted in the present invention content is specific as follows:
A kind of emulated computation method of Transformer Winding Temperature Rise characteristic, includes the following steps:
S1: it establishes model: being existed according to the actual size of the tank body of oil tank of transformer, high-voltage winding, low pressure winding and iron core
Model is established in finite element emulation software；
S2: finite element division is carried out to model: the adaptive meshing algorithm carried using ANSYS software and division pair manually
The model carries out finite element division；
S3: setting transformer oil physical parameter: setting transformer oil density, thermal coefficient, dynamic viscosity and specific heat at constant pressure
Hold；
S4: the material category of transformer core, high-voltage winding and low pressure winding setting transformer part parameter: is respectively set
Property, specific heat capacity, density, thermal coefficient and heat flux；
S5: setting boundary condition；
S6: it carries out bidirectional couple calculating: different loads COEFFICIENT K being set to the transformer, utilizes finite element emulation software
The bidirectional couple carried out between temperature field and fluid field calculates, material properties iteration with the variation of temperature and flow velocity, until full
Transformer temperature characteristic can be obtained in the sufficient condition of convergence.
Further, the actual size according to oil tank of transformer, winding and iron core is built in finite element emulation software
Include following assuming in the step of vertical model:
(1) transformer single analysis is selected, two-dimensional axial symmetric model is established, iron core center is set as symmetry axis；
(2) heat source is iron core, high-voltage winding and low pressure winding；
(3) circumferentially radial direction temperature is identical for the high-voltage winding and low pressure winding.
Further, the step of setting boundary condition includes the following steps:
S51: the initial temperature of the model is defined；
S52: setting the ambient temperature of the transformer, and assumes that ambient temperature is constant；
S53: the transformer equivalent convection heat transfer coefficient is calculated, and radiating surface emissivity is set, and is described equivalent
Convection transfer rate indicates are as follows: he=h (S1+S2), in which: S1For the surface area of tank body of oil tank, S2For the gross area of cooling fin, h
For fuel tank and the convection transfer rate of cooling fin；
S54: defining the boundary of fixed part as no slip boundary, and the symmetrical border for defining fixed part is slip boundary.
Further, the mathematical model that the bidirectional couple calculates are as follows:
Wherein: ρ is fluid density, and ν is flow velocity, and F is external volume power, and p is pressure, and μ is dynamic viscosity, and c is specific heat capacity, and T is
Temperature, λ are thermal conductivity, and q is volumetric heat.
Further, step S6 further includes the steps that heat flux is corrected, and the heat flux amendment is real in the following manner
It is existing: Q (t)=Q0[1+α(Ts-T0)], in which: Q0For initial temperature T0When heat flux, TsTo iteratively solve obtained real-time temperature
Degree, α are instead of temperature hierarchy.
Compared with prior art, the beneficial effects of the present invention are:
The emulated computation method of Transformer Winding Temperature Rise characteristic of the present invention, by FInite Element, hydrodynamics and in terms of
Based on calculating thermal conduction study, and proposed using ANSYS Fluent software using temperature-fluid field coupling mathematical calculation model
The emulated computation method of oil-immersed power transformer coiling hotspot temperature rise.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the calculation flow chart of emulated computation method of the present invention；
Fig. 2 is temperature fluid coupling analysis flow chart；
Fig. 3 is the temperature characteristic simulation result of transformer under dynamic load；
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to specific embodiment, structure, feature and its effect according to the present invention, detailed description are as follows:
Embodiment one:
A kind of emulated computation method of Transformer Winding Temperature Rise characteristic of the present invention as shown in Fig. 1, including such as
Lower step:
S1: it establishes model: being existed according to the actual size of the tank body of oil tank of transformer, high-voltage winding, low pressure winding and iron core
Model is established in finite element emulation software；
Specifically: in modeling process, transformer single analysis is selected, two-dimensional axial symmetric model is established, by iron
The heart is set as symmetry axis in the heart；Low-tension side of power transformer winding parameter, high-pressure side winding parameter, oil duct parameter, iron core ginseng are set
Several and fuel tank parameter；Heat source only considers iron core and high-low pressure windings section；Transformer high-low-voltage winding circumferentially radial temperature etc.
Effect is unchanged.
S2: finite element division is carried out to model: the adaptive meshing algorithm carried using ANSYS software and division pair manually
The model carries out finite element division, specifically carries out subdivision using surface grids of the Hypermesh to model, recycles icem cfd
Module carries out subdivision with tetrahedron to volume mesh.
S3: setting transformer oil physical parameter: setting transformer oil density, thermal coefficient, dynamic viscosity and specific heat at constant pressure；
S4: the material category of transformer core, high-voltage winding and low pressure winding setting transformer part parameter: is respectively set
Property, specific heat capacity, density, thermal coefficient and heat flux；
S5: setting boundary condition；
S6: it carries out bidirectional couple calculating: different loads COEFFICIENT K being set to the transformer, utilizes finite element emulation software
The bidirectional couple carried out between temperature field and fluid field calculates, material properties iteration with the variation of temperature and flow velocity, until full
Transformer temperature characteristic can be obtained in the sufficient condition of convergence.
Specifically, the condition of convergence is unbalanced error less than 0.1%, as shown in Fig. 2 of the present invention double
It is calculated to coupling comprising following steps: a
S61: temperature fluid field computation model is established；
S62: temperature field and fluid field are solved respectively；
S63: judging whether temperature field and fluid field meet the condition of convergence respectively, such as meets, then exports calculated result；If
It is unsatisfactory for, then recalculates temperature field and fluid field is iterated, until meeting the condition of convergence, stopping iteration and exporting calculating knot
Fruit.
It is preferably carried out mode as one kind, the actual size according to oil tank of transformer, winding and iron core is limited
Include following hypothesis in the step of model established in first simulation software:
(1) transformer single analysis is selected, two-dimensional axial symmetric model is established, iron core center is set as symmetry axis；
(2) heat source is iron core, high-voltage winding and low pressure winding；
(3) circumferentially radial direction temperature is identical for the high-voltage winding and low pressure winding.
Mode is preferably carried out as one kind, and the step of setting boundary condition includes the following steps:
S51: defining the initial temperature of the model, specifically, defines the initial temperature of the model to define transformer
Fuel tank, iron core, high-voltage winding and low pressure winding initial temperature；
S52: setting the ambient temperature of the transformer, and assumes that ambient temperature is constant；
S53: the transformer equivalent convection heat transfer coefficient is calculated, and radiating surface emissivity is set, and is described equivalent
Convection transfer rate indicates are as follows: he=h (S1+S2), in which: S1For the surface area of tank body of oil tank, S2For the gross area of cooling fin, h
For fuel tank and the convection transfer rate of cooling fin；
S54: the boundary of fixed part is defined as no slip boundary, the symmetrical border of fixed part is slip boundary, specifically
Ground, the fixed part include fuel tank, iron core, low pressure winding and high-voltage winding etc..
Mode, the mathematical model that the bidirectional couple calculates are preferably carried out as one kind are as follows:
Wherein: ρ is fluid density, and ν is flow velocity, and F is external volume power, and p is pressure, and μ is dynamic viscosity, and c is specific heat capacity, and T is
Temperature, λ are thermal conductivity, and q is volumetric heat.
It is preferably carried out mode as one kind, step S6 further includes the steps that heat flux is corrected, and considers direct current damage in copper loss
Consumption accounts for major part, and the resistance value of winding is synthermal directly proportional, and the heat flux amendment is accomplished by the following way: Q (t)=Q0
[1+α(Ts-T0)], in which: Q0For initial temperature T0When heat flux, TsTo iteratively solve obtained real time temperature, α is to replace temperature
Degree system, for copper conductor, α=0.00393.
Embodiment two:
The used model of the present embodiment is 35kV/315kVA oil-immersed transformer, and the transformer is based on ANSYS
Transformer temperature characteristic emulation mode is emulated under the dynamic load of Fluent, the specific steps are as follows:
S1, model is established: according to the actual size of oil tank of transformer, winding and iron core in finite element emulation software
(ANSYS) model is established in；
Specifically in the present embodiment, fuel tank height is set as 1070mm, width 255mm；Iron core height is 840mm, width
For 87.5mm；Low pressure winding is divided into two layers, is highly 438mm, and width is 8.75mm, the wide 5mm of the oil clearance between two layers；It is high
Pressure winding height is 378mm, width 40mm；The wide 6.5mm of oil clearance between iron core and low pressure winding, it is oily between low pressure and high-voltage winding
The wide 20mm of gap, the wide 75mm of oil clearance between high-voltage winding and oil tank wall；Iron core is apart from tank bottoms 12mm, high-low pressure winding and iron core
Align center.
S2, finite element division is carried out to model: the adaptive meshing algorithm carried using ANSYS software and division pair manually
The model carries out finite element division；
Specifically in the present embodiment: being cutd open in the edge of iron core, low pressure winding and high-voltage winding using extreme tessellated mesh
Point, other regions use standard tessellated mesh subdivision, and the total unit number of mesh generation is 2086.
S3, setting transformer oil physical parameter: setting transformer oil density, thermal coefficient, dynamic viscosity and specific heat at constant pressure
Hold；
Specifically in the present embodiment, the oily physical parameter of the transformer is as shown in table 1:
1 transformer oil physical parameter of table
During thermostabilization, the physical characteristic of transformer oil varies with temperature variation, and T is that transformer oil is real-time in table 1
Temperature.
S4, setting transformer part parameter: the material category of transformer core, high-voltage winding and low pressure winding is respectively set
Property, specific heat capacity, density, thermal coefficient and heat flux；
Specifically in the present embodiment, the fastener material physical parameter of the transformer is as shown in table 2
2 transformer firmware physical parameter of table
S5, setting boundary condition；
Specifically in the present embodiment, setting transformer ambient temperature is 293.15K, ignores the thickness of oil tank wall, right
The stream coefficient of heat transfer need to take into account the area for the cooling fin ignored, according to ignoring before and after cooling fin the ratio between heat dissipation area in proportion
Increase the heat convection of transformer case.The surface area S of tank body of oil tank1=5073000m2, cooling fin gross area S2=
9472000m2, consider that the convection transfer rate of fuel tank and cooling fin is h=5Wm-2·K-1, equivalent heat convection system at this time
Number he=h (S1+S2)/S1It calculates, equivalent convection heat transfer coefficient heFor 14.3Wm-2·K-1.Radiating surface is provided with simultaneously to send out
Penetrate rate.The fixed parts such as fuel tank, iron core, winding boundary definition is no slip boundary, and symmetrical border is defined as sliding.
S6, it carries out bidirectional couple calculating: different loads COEFFICIENT K is set to transformer, carry out temperature field using ANSYS software
Bidirectional couple between fluid field calculates, material properties iteration with the variation of temperature and flow velocity, until meet the condition of convergence,
Obtain transformer temperature characteristic.
Dynamic load scheme is designed, the program includes 6 stages altogether: load factor K=1 when 0s (A)~11400s (B),
Load factor K=1.5 when load factor K=0.6,21900s (C) when 11400s (B)~21900s (C)~30000s (D),
Load factor K=2.1 when load factor K=0.3,42600s (E) when 30000s (D)~42600s (E)~54100s (F),
Load factor K=0 when 54100s (F)~65000s (G), and based on transformer temperature characteristic simulation result under the dynamic load
As shown in Figure 3.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (5)
1. a kind of emulated computation method of Transformer Winding Temperature Rise characteristic, characterized by the following steps:
S1: model is established: according to the actual size of the tank body of oil tank of transformer, high-voltage winding, low pressure winding and iron core limited
Model is established in first simulation software；
S2: carry out finite element division to model: the adaptive meshing algorithm carried using ANSYS software and manual division are to the mould
Type carries out finite element division；
S3: setting transformer oil physical parameter: setting transformer oil density, thermal coefficient, dynamic viscosity and specific heat at constant pressure；
S4: setting transformer part parameter: be respectively set transformer core, high-voltage winding and low pressure winding material properties,
Specific heat capacity, density, thermal coefficient and heat flux；
S5: setting boundary condition；
S6: it carries out bidirectional couple calculating: different loads COEFFICIENT K being set to the transformer, is carried out using finite element emulation software
Bidirectional couple between temperature field and fluid field calculates, and is iterated according to material properties with the variation of temperature and flow velocity, until
Meet the condition of convergence, transformer temperature characteristic can be obtained.
2. emulated computation method as described in claim 1, it is characterised in that: described according to oil tank of transformer, winding and iron core
Actual size established in finite element emulation software model the step of in include following assuming:
(1) transformer single analysis is selected, two-dimensional axial symmetric model is established, iron core center is set as symmetry axis；
(2) heat source is iron core, high-voltage winding and low pressure winding；
(3) circumferentially radial direction temperature is identical for the high-voltage winding and low pressure winding.
3. emulated computation method as described in claim 1, it is characterised in that: include as follows the step of the setting boundary condition
Step:
S51: the initial temperature of the model is defined；
S52: setting the ambient temperature of the transformer, and assumes that ambient temperature is constant；
S53: calculating the transformer equivalent convection heat transfer coefficient, and radiating surface emissivity be arranged, and the equivalent convection current
The coefficient of heat transfer indicates are as follows: he=h (S1+S2), in which: S1For the surface area of tank body of oil tank, S2For the gross area of cooling fin, h is oil
The convection transfer rate of case and cooling fin；
S54: the boundary of fixed part is defined as no slip boundary, the symmetrical border of fixed part is slip boundary.
4. emulated computation method as described in claim 1, it is characterised in that: the mathematical model that the bidirectional couple calculates are as follows:
Wherein: ρ is fluid density, and ν is flow velocity, and F is external volume power, and p is pressure, and μ is dynamic viscosity, and c is specific heat capacity, and T is
Temperature, λ are thermal conductivity, and q is volumetric heat.
5. emulated computation method as claimed in claim 4, it is characterised in that: step S6 further includes the steps that heat flux is corrected,
The heat flux amendment is accomplished by the following way: Q (t)=Q0[1+α(Ts-T0)], in which: Q0For initial temperature T0When heat it is logical
Amount, TsTo iteratively solve obtained real time temperature, α is instead of temperature hierarchy.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110334475A (en) * | 2019-07-18 | 2019-10-15 | 杭州电力设备制造有限公司 | Calculation method, system, equipment and the storage medium of power transformer temperature rise of hot spot |
| CN110361109A (en) * | 2019-07-18 | 2019-10-22 | 杭州电力设备制造有限公司 | A kind of temperature computation method of indoor substation, system and device |
| CN111192772A (en) * | 2019-12-31 | 2020-05-22 | 国网北京市电力公司 | Method and device for processing characteristics of movable iron core of voltage regulating switch |
| CN111881597A (en) * | 2020-06-16 | 2020-11-03 | 北京交通大学 | Calculation method for insulation heat conductivity coefficient of winding |
| CN112001081A (en) * | 2020-08-25 | 2020-11-27 | 西南交通大学 | Lightweight vehicle-mounted traction transformer hotspot factor calculation method |
| CN112818572A (en) * | 2021-01-19 | 2021-05-18 | 三峡大学 | Optimization method for structural parameters of winding area of oil-immersed transformer |
| CN113128025A (en) * | 2021-03-19 | 2021-07-16 | 广西电网有限责任公司电力科学研究院 | Optimization method of transformer winding fluid temperature field simulation model |
| CN113255172A (en) * | 2021-07-12 | 2021-08-13 | 国网江西省电力有限公司电力科学研究院 | Winding real-time temperature rise calculation method under repeated short-time short-circuit working condition |
| CN115034042A (en) * | 2022-05-25 | 2022-09-09 | 国网湖北省电力有限公司电力科学研究院 | Method for correcting convection heat transfer coefficient of variable-property transformer oil |
| CN115659765A (en) * | 2022-12-12 | 2023-01-31 | 广东电网有限责任公司中山供电局 | Cable joint temperature field calculation method and device, electronic equipment and storage medium |
| CN115753880A (en) * | 2022-11-22 | 2023-03-07 | 西南交通大学 | Oil-immersed vehicle-mounted traction transformer heat dissipation performance evaluation method based on comprehensive temperature rise factors |
| CN115034042B (en) * | 2022-05-25 | 2024-04-12 | 国网湖北省电力有限公司电力科学研究院 | Correction method for convective heat transfer coefficient of transformer oil with variable physical properties |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-09-21 CN CN201811104968.3A patent/CN109255192A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 江翼等: "考虑负载变化的植物绝缘油变压器温升特性研究", 《高压电器》 * |
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| CN110361109A (en) * | 2019-07-18 | 2019-10-22 | 杭州电力设备制造有限公司 | A kind of temperature computation method of indoor substation, system and device |
| CN110361109B (en) * | 2019-07-18 | 2020-09-04 | 杭州电力设备制造有限公司 | Temperature calculation method, system and device for indoor transformer substation |
| CN110334475A (en) * | 2019-07-18 | 2019-10-15 | 杭州电力设备制造有限公司 | Calculation method, system, equipment and the storage medium of power transformer temperature rise of hot spot |
| CN111192772A (en) * | 2019-12-31 | 2020-05-22 | 国网北京市电力公司 | Method and device for processing characteristics of movable iron core of voltage regulating switch |
| CN111881597A (en) * | 2020-06-16 | 2020-11-03 | 北京交通大学 | Calculation method for insulation heat conductivity coefficient of winding |
| CN111881597B (en) * | 2020-06-16 | 2023-09-05 | 北京交通大学 | Method for calculating insulation heat conductivity coefficient of winding |
| CN112001081A (en) * | 2020-08-25 | 2020-11-27 | 西南交通大学 | Lightweight vehicle-mounted traction transformer hotspot factor calculation method |
| CN112818572A (en) * | 2021-01-19 | 2021-05-18 | 三峡大学 | Optimization method for structural parameters of winding area of oil-immersed transformer |
| CN113128025B (en) * | 2021-03-19 | 2022-09-16 | 广西电网有限责任公司电力科学研究院 | Optimization method of transformer winding fluid temperature field simulation model |
| CN113128025A (en) * | 2021-03-19 | 2021-07-16 | 广西电网有限责任公司电力科学研究院 | Optimization method of transformer winding fluid temperature field simulation model |
| CN113255172A (en) * | 2021-07-12 | 2021-08-13 | 国网江西省电力有限公司电力科学研究院 | Winding real-time temperature rise calculation method under repeated short-time short-circuit working condition |
| CN113255172B (en) * | 2021-07-12 | 2021-11-19 | 国网江西省电力有限公司电力科学研究院 | Winding real-time temperature rise calculation method under repeated short-time short-circuit working condition |
| CN115034042A (en) * | 2022-05-25 | 2022-09-09 | 国网湖北省电力有限公司电力科学研究院 | Method for correcting convection heat transfer coefficient of variable-property transformer oil |
| CN115034042B (en) * | 2022-05-25 | 2024-04-12 | 国网湖北省电力有限公司电力科学研究院 | Correction method for convective heat transfer coefficient of transformer oil with variable physical properties |
| CN115753880A (en) * | 2022-11-22 | 2023-03-07 | 西南交通大学 | Oil-immersed vehicle-mounted traction transformer heat dissipation performance evaluation method based on comprehensive temperature rise factors |
| CN115753880B (en) * | 2022-11-22 | 2024-03-19 | 西南交通大学 | Evaluation method for heat dissipation performance of oil-immersed vehicle-mounted traction transformer based on comprehensive temperature rise factors |
| CN115659765A (en) * | 2022-12-12 | 2023-01-31 | 广东电网有限责任公司中山供电局 | Cable joint temperature field calculation method and device, electronic equipment and storage medium |
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Application publication date: 20190122 |