CN108717482A - Wind power generation transformer insulating board air entrapment model evaluation method - Google Patents
Wind power generation transformer insulating board air entrapment model evaluation method Download PDFInfo
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Abstract
The present invention provides a kind of wind power generation transformer insulating board air entrapment model evaluation method, including step：S1：A wind power generation transformer insulating board air entrapment simulation model is established using COMSOL multiple physical fields simulation software；S2：Parameter by changing the wind power generation transformer insulating board air entrapment simulation model carries out multigroup emulation testing, and records emulation testing data；S3：According to the size position of bubble submodel described in the test data analysis and the relationship of maximum field strength.A kind of wind power generation transformer insulating board air entrapment model evaluation method of the present invention, it is detected by the various dielectric features amounts to insulating board, it is combined with the severity of shelf depreciation, reference is provided from overhaul of the equipments to repair based on condition of component as wind power generation transformer, keeps decision more reliable and more stable.
Description
Technical field
The present invention relates to wind power generation transformer insulation protection field more particularly to a kind of wind power generation transformer insulating papers
Intralamellar part bubble model evaluation method.
Background technology
Transformer is one of highly important equipment in power system device, the meeting pair if wind power generation transformer breaks down
Personal safety and economy cause inestimable influence, and great mass of data shows the damage of these insulation of electrical installation performances
It is the main reason for leading to their equipment failures, wherein there are be easily attractive when air blister defect inside insulator epoxy resin
One factor of interior insulator electric discharge, therefore analyze influence right and wrong of the insulator electric field of bubbles defect to its built-in electrical insulation
It is often significant, also there is very important meaning for wind power plant and power grid operation.
Invention content
Deficiency in for the above-mentioned prior art, the present invention provide a kind of wind power generation transformer insulating board air entrapment
Model evaluation method is detected by the various dielectric features amounts to insulating board, is mutually tied with the severity of shelf depreciation
It closes, provides reference from overhaul of the equipments to repair based on condition of component as wind power generation transformer, keep decision more reliable and more stable.
To achieve the goals above, the present invention provides a kind of wind power generation transformer insulating board air entrapment model evaluation
Method, including step：
S1：A wind power generation transformer insulating board air entrapment is established using COMSOL multiple physical fields simulation software to emulate
Model, the wind power generation transformer insulating board air entrapment simulation model include an oil droplet submodel, an insulating paper plank
Model, a bubble submodel and two ball electrode submodels, the two ball electrode submodels are located in the oil droplet submodel, described
Insulating board submodel is between the two ball electrode submodels and in the oil droplet submodel, the bubble submodel
In the insulating board submodel；
S2：Parameter by changing the wind power generation transformer insulating board air entrapment simulation model carries out multigroup imitative
True test, and record emulation testing data；
S3：According to the size position of bubble submodel described in the test data analysis and the relationship of maximum field strength.
Preferably, the S1 steps further comprise step：
Establish the oil droplet submodel, the insulating board submodel, the bubble submodel and the ball electrode submodule
Type；
Set a property parameter.
Preferably, described to establish the oil droplet submodel, the insulating board submodel, the bubble submodel and described
In ball electrode submodel step：
It is modeled using the pattern of two-dimensional axial symmetric, the ball electrode submodel radius is 4mm；The insulating board submodel
Wide 10mm, high 2mm；The bubble submodel is rounded；The radius of the oil droplet submodel is 24mm.
Preferably, the property parameters step of the setting model further comprises step：
The material that the ball electrode submodel is arranged is metal brass, relative dielectric constant 1e8；Bubble is set
Model is air bubble, relative dielectric constant 1；The dielectric constant that the insulating board submodel is arranged is 3；The oil is set
The dielectric constant for dripping submodel is 2.23；The electricity of the wind power generation transformer insulating board air entrapment simulation model is set
Position applies high potential 500kV, by the wind to the top of the wind power generation transformer insulating board air entrapment simulation model
The bottom of power power generation transformer insulating paper intralamellar part bubble simulation model is grounded as low potential.
Preferably, the S2 steps further comprise step：
S21：Establish a space coordinates, the space coordinates include an orthogonal X-axis, a Y-axis and a Z axis,
The Z axis is vertically arranged；
S22：Apply the power-frequency voltage of 15kV to the ball electrode submodel；
S23：The center of circle of the fixed bubble submodel, while the radius of the bubble submodel is varied multiple times, record the
One emulation testing data group；
S24：The radius of the bubble submodel is set to be constant value, is then varied multiple times along the Z-direction described
The position in the center of circle of bubble submodel, record second prevent test data set；The emulation testing data include described first imitative
True test data set and described second prevents test data set.
Preferably, the S3 steps further comprise step：
According to the property parameters and the power-frequency voltage, is drawn and obtained using COMSOL multiple physical fields simulation software
One potential profile and a potential cloud atlas；
It is drawn according to the potential profile, the potential cloud atlas and the first emulation testing data group and obtains a bubble
Radius size and maximum field strength relational graph；According to bubble submodule described in the bubble radius size and maximum field strength relationship map analysis
The relationship of type and maximum field strength；
It is drawn according to the potential profile, the potential cloud atlas and the second emulation testing data group and obtains a bubble
Position and maximum field strength relational graph；According to the bubble position with bubble submodel described in maximum field strength relationship map analysis described
The relationship of position and maximum field strength in insulating board submodel.
The present invention makes it have following advantageous effect as a result of above technical scheme：
The present invention uses COMSOL multiple physical fields simulation software, establishes the emulated physics mould similar to actual experimental model
Type calculates its field distribution, with its efficient calculated performance and outstanding more two-way direct coupling analysis abilities
Realize the numerical simulation of high precision.It can clearly observe that creeping discharge influences electric field strength on minimum bubble model, from
And reliable data reference can be provided during overhaul of the equipments, and have studied the shadow of Air Bubble Size and position to field distribution
It rings；Security and stability for improving wind generator system operation has very important meaning.
Description of the drawings
Fig. 1 is the flow of the wind power generation transformer insulating board air entrapment model evaluation method of the embodiment of the present invention
Figure；
Fig. 2 is the wind power generation transformer insulating board air entrapment simulation model structural schematic diagram of the embodiment of the present invention；
Fig. 3 is the bubble radius size and maximum field strength relational graph of the embodiment of the present invention；
Fig. 4 is the bubble position and maximum field strength relational graph of the embodiment of the present invention.
Specific implementation mode
Below according to 1~Fig. 4 of attached drawing, presently preferred embodiments of the present invention is provided, and be described in detail, enabled more preferable geographical
Solve function, the feature of the present invention.
It please refers to Fig.1 and Fig. 2, a kind of wind power generation transformer insulating board air entrapment model of the embodiment of the present invention is commented
Estimate method, including step：
S1：A wind power generation transformer insulating board air entrapment is established using COMSOL multiple physical fields simulation software to emulate
Model, wind power generation transformer insulating board air entrapment simulation model include an oil droplet submodel 1, an insulating board submodel
2, a bubble submodel 3 and two ball electrode submodels 4, two ball electrode submodels 4 are located in oil droplet submodel 1, insulating paper plank
For model 2 between two ball electrode submodels 4 and in oil droplet submodel 1, bubble submodel 3 is located at insulating board submodel
In 2；
Wherein, S1 steps further comprise step：
Establish oil droplet submodel 1, insulating board submodel 2, bubble submodel 3 and ball electrode submodel 4；Wherein, it uses
The pattern of two-dimensional axial symmetric models, and 4 radius of ball electrode submodel is 4mm；Insulating board submodel 2 width 10mm, high 2mm；Bubble
Submodel 3 is rounded；The radius of oil droplet submodel 1 is 24mm.
Set a property parameter, and the property parameters step that model is arranged further comprises step：
The material that ball electrode submodel 4 is arranged is metal brass, relative dielectric constant 1e8；Bubble submodel 3, which is arranged, is
Air bubble, relative dielectric constant 1；The dielectric constant that insulating board submodel 2 is arranged is 3；Jie of oil droplet submodel 1 is set
Electric constant is 2.23；The current potential of wind power generation transformer insulating board air entrapment simulation model is set, to wind-power electricity generation transformation
The top of device insulating board air entrapment simulation model applies high potential 500kV, inside wind power generation transformer insulating board
The bottom of bubble simulation model is grounded as low potential.
S2：Parameter by changing wind power generation transformer insulating board air entrapment simulation model carries out multigroup emulation and surveys
Examination, and record emulation testing data；
In the present embodiment, S2 steps further comprise step：
S21：A space coordinates are established, space coordinates include an orthogonal X-axis, a Y-axis and a Z axis, Z axis edge
Vertical direction is arranged；
S22：Apply the power-frequency voltage of 15kV to ball electrode submodel 4；
S23：The center of circle of fixed bubble submodel 3, for example, can be fixed on Z axis coordinate value is 0 position, while repeatedly changing
Become the radius of bubble submodel 3, records the first emulation testing data group, the first emulation testing data group includes bubble submodel 3
Radius size；
S24：The radius of bubble submodel 3 is set to be constant value, bubble submodel 3 then is varied multiple times along Z-direction
The center of circle position, for example, can be arranged bubble submodel 3 radius be 0.3mm；Then the Z-direction for being 2 along X axis coordinate value
It is varied multiple times the position in the center of circle of bubble submodel 3, in the present embodiment, the multiple value of Z axis coordinate value is：-0.7,-0.6,-
0.5, -0.4, -0.3, -0.2, -0.1,0,0.1,0.2,0.3,0.4,0.5,0.6 and 0.7.Record second prevents test data
Group, second to prevent test data set include the Z axis coordinate value of the position in the center of circle of bubble submodel 3；
Emulation testing data, which include the first emulation testing data group and second, prevents test data set.
S3：According to the relationship of the size position and maximum field strength of test data analysis bubble submodel 3.
Wherein, S3 steps further comprise step：
According to property parameters and power-frequency voltage, is drawn using COMSOL multiple physical fields simulation software and obtain a potential profile
With a potential cloud atlas；Potential profile is a plurality of on wind power generation transformer insulating board air entrapment simulation model for showing
The numerical value of potential contours and each potential contours, numerical value are shown by different colors；Potential cloud atlas is for showing wind-force
The number of the multiple potential contour surfaces and each potential contour surface that generate electricity on transformer insulating paper intralamellar part bubble simulation model
Value, numerical value are shown by different colors.
Fig. 2 and Fig. 3 are please referred to, is drawn according to potential profile, potential cloud atlas and the first emulation testing data group and obtains one
Bubble radius size and maximum field strength relational graph, according to bubble radius size and maximum field strength relationship map analysis bubble submodel 3
With the relationship of maximum field strength.It in the present embodiment, can obtain when the position in the center of circle of bubble submodel 3 is constant, with bubble
The increase of the radius of model 3 acts on also bigger conclusion to the distortion of internal field.
Fig. 2 and Fig. 4 are please referred to, is drawn according to potential profile, potential cloud atlas and the second emulation testing data group and obtains one
Bubble position and maximum field strength relational graph；According to bubble position and maximum field strength relationship map analysis bubble submodel 3 in insulating paper
The relationship of position and maximum field strength in plank model 2.In the present embodiment, when 3 radius size of bubble submodel is 0.3mm, gas
Internal field is influenced when the Z axis coordinate value of lake model 3 is -0.7 minimum.
A kind of wind power generation transformer insulating board air entrapment model evaluation method of the embodiment of the present invention uses
COMSOL multiple physical fields simulation software establishes the emulated physics model similar to actual experimental model, to its field distribution into
It has gone calculating, the number of high precision is realized with its efficient calculated performance and outstanding more two-way direct coupling analysis abilities
Value emulation, and have studied the influence of Air Bubble Size and position to field distribution.
A kind of wind power generation transformer insulating board air entrapment model evaluation method of the embodiment of the present invention, can be applicable to
In terms of wind turbine transformer insulation protection, partial discharge monitoring can be carried out to insulation fault, be overhaul of the equipments from meter
Draw maintenance to repair based on condition of component provide data reference, realize it is reliable, safe, in real time to the monitoring of motor operating state.For
The safe and stable operation of electric system also has very important meaning.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this
Invention will be using the range that the appended claims define as protection scope of the present invention.
Claims (6)
1. a kind of wind power generation transformer insulating board air entrapment model evaluation method, including step：
S1：A wind power generation transformer insulating board air entrapment, which is established, using COMSOL multiple physical fields simulation software emulates mould
Type, the wind power generation transformer insulating board air entrapment simulation model include an oil droplet submodel, an insulating board submodule
Type, a bubble submodel and two ball electrode submodels, the two ball electrode submodels are located in the oil droplet submodel, described exhausted
Edge cardboard submodel is between the two ball electrode submodels and in the oil droplet submodel, bubble submodel position
In in the insulating board submodel；
S2：Parameter by changing the wind power generation transformer insulating board air entrapment simulation model carries out multigroup emulation and surveys
Examination, and record emulation testing data；
S3：According to the size position of bubble submodel described in the test data analysis and the relationship of maximum field strength.
2. wind power generation transformer insulating board air entrapment model evaluation method according to claim 1, feature exist
In the S1 steps further comprise step：
Establish the oil droplet submodel, the insulating board submodel, the bubble submodel and the ball electrode submodel；
Set a property parameter.
3. wind power generation transformer insulating board air entrapment model evaluation method according to claim 2, feature exist
In described to establish the oil droplet submodel, the insulating board submodel, the bubble submodel and the ball electrode submodel
In step：
It is modeled using the pattern of two-dimensional axial symmetric, the ball electrode submodel radius is 4mm；The insulating board submodule molded breadth
10mm, high 2mm；The bubble submodel is rounded；The radius of the oil droplet submodel is 24mm.
4. wind power generation transformer insulating board air entrapment model evaluation method according to claim 3, feature exist
In the property parameters step of the setting model further comprises step：
The material that the ball electrode submodel is arranged is metal brass, relative dielectric constant 1e8；The bubble submodel is set
For air bubble, relative dielectric constant 1；The dielectric constant that the insulating board submodel is arranged is 3；Oil droplet is set
The dielectric constant of model is 2.23；The current potential of the wind power generation transformer insulating board air entrapment simulation model is set, it is right
The top of the wind power generation transformer insulating board air entrapment simulation model applies high potential 500kV, and the wind-force is sent out
The bottom of piezoelectric transformer insulating board air entrapment simulation model is grounded as low potential.
5. wind power generation transformer insulating board air entrapment model evaluation method according to claim 4, feature exist
In the S2 steps further comprise step：
S21：A space coordinates are established, the space coordinates include an orthogonal X-axis, a Y-axis and a Z axis, the Z
Axis is vertically arranged；
S22：Apply the power-frequency voltage of 15kV to the ball electrode submodel；
S23：The center of circle of the fixed bubble submodel, while the radius of the bubble submodel is varied multiple times, record first is imitative
True test data set；
S24：The radius of the bubble submodel is set to be constant value, the bubble then is varied multiple times along the Z-direction
The position in the center of circle of submodel, record second prevent test data set；The emulation testing data include that first emulation is surveyed
Examination data group and described second prevents test data set.
6. wind power generation transformer insulating board air entrapment model evaluation method according to claim 5, feature exist
In the S3 steps further comprise step：
According to the property parameters and the power-frequency voltage, is drawn using COMSOL multiple physical fields simulation software and obtain an electricity
Gesture distribution map and a potential cloud atlas；
It is drawn according to the potential profile, the potential cloud atlas and the first emulation testing data group and obtains a bubble radius
Size and maximum field strength relational graph；According to bubble submodel described in the bubble radius size and maximum field strength relationship map analysis with
The relationship of maximum field strength；
It is drawn according to the potential profile, the potential cloud atlas and the second emulation testing data group and obtains a bubble position
With maximum field strength relational graph；According to bubble submodel described in the bubble position and maximum field strength relationship map analysis in the insulation
The relationship of position and maximum field strength in cardboard submodel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110414118A (en) * | 2019-07-23 | 2019-11-05 | 上海电机学院 | A kind of Boost modeling method and application based on separate type modeling |
| CN113378375A (en) * | 2021-06-08 | 2021-09-10 | 云南电网有限责任公司电力科学研究院 | Fault prediction method, device, equipment and medium for transformer insulation structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107976613A (en) * | 2017-10-17 | 2018-05-01 | 广西电网有限责任公司电力科学研究院 | A kind of quantitative evaluating method of transformer oil paper insulation state |
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2018
- 2018-05-11 CN CN201810448302.3A patent/CN108717482A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976613A (en) * | 2017-10-17 | 2018-05-01 | 广西电网有限责任公司电力科学研究院 | A kind of quantitative evaluating method of transformer oil paper insulation state |
Non-Patent Citations (2)
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| 周力行等: "变压器局部放电超声信号特性及放电源定位", 《高电压技术》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110414118A (en) * | 2019-07-23 | 2019-11-05 | 上海电机学院 | A kind of Boost modeling method and application based on separate type modeling |
| CN110414118B (en) * | 2019-07-23 | 2023-05-05 | 上海电机学院 | Boost converter modeling method based on separation modeling and application |
| CN113378375A (en) * | 2021-06-08 | 2021-09-10 | 云南电网有限责任公司电力科学研究院 | Fault prediction method, device, equipment and medium for transformer insulation structure |
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