CN111243837B - Optimization method for insulation structure of converter transformer valve side sleeve wire outlet device - Google Patents
Optimization method for insulation structure of converter transformer valve side sleeve wire outlet device Download PDFInfo
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- CN111243837B CN111243837B CN202010032605.4A CN202010032605A CN111243837B CN 111243837 B CN111243837 B CN 111243837B CN 202010032605 A CN202010032605 A CN 202010032605A CN 111243837 B CN111243837 B CN 111243837B
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- 238000005457 optimization Methods 0.000 title claims abstract description 30
- 238000009413 insulation Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000011156 evaluation Methods 0.000 claims abstract description 28
- 230000005684 electric field Effects 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005314 correlation function Methods 0.000 claims description 3
- 239000000123 paper Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 1
- 238000013077 scoring method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an optimization method of an insulation structure of a valve side sleeve outlet device of a converter transformer, which comprises the steps of determining factors influencing the insulation structure of the valve side sleeve outlet device of an extra-high voltage converter, constructing an optimization objective function based on the factors, constructing an evaluation function based on the optimization objective function, optimizing the evaluation function by utilizing a penalty function and constraint conditions to obtain an unconstrained evaluation function, solving the unconstrained evaluation function to obtain the weight of the optimization objective function and the like.
Description
Technical Field
The invention relates to the technical field of electrical insulation, in particular to an optimization method of an insulation structure of a converter transformer valve side bushing outlet device.
Background
The insulation structure of the valve side sleeve wire outlet device of the extra-high voltage converter transformer is an insulation device for connecting the valve side sleeve wire and a winding coil of the converter transformer, so that the insulation structure of the valve side sleeve wire outlet device has good electrical insulation performance.
At present, an insulation structure of an outlet device of a valve side sleeve of an extra-high voltage converter transformer is divided into an open type and a closed type, wherein: (1) the open type outlet structure has a simple insulating structure, is beneficial to the flowing of transformer oil and is convenient for heat dissipation, the electric field distribution in the barrier paperboard is reasonable, but the tangential field intensity of the transformer oil along the surface of the insulating barrier is high; (2) the closed type outlet structure is composed of the special-shaped barriers, the structure is complex, the heat dissipation condition is poor, the electric field intensity in the normal direction born by the special-shaped barriers is high, but the tangential electric field intensity of the surface of the oil barriers in the oil is low, and the surface flashover along the oil-paper interface can be prevented.
However, in order to meet the insulation requirement of the valve side bushing outlet device insulation structure of the extra-high voltage converter transformer, attention needs to be paid to preventing the surface flashover of an oil-paper interface, and consideration needs to be given to the fact that good heat dissipation is required and the normal field strength borne by an insulation paper board needs to meet the requirement that the tolerance strength cannot be too high, so that the valve side bushing outlet device insulation structure of the extra-high voltage converter transformer needs to be optimized.
Disclosure of Invention
The invention aims to provide an optimization method of an insulation structure of a valve side sleeve outgoing device of a converter transformer, which can optimize the insulation structure of the valve side sleeve outgoing device of an extra-high voltage converter so as to ensure that the insulation structure of the valve side sleeve outgoing device of the extra-high voltage converter transformer has better insulation performance and heat dissipation performance.
In order to solve the technical problems, the technical scheme adopted by the invention specifically comprises the following contents:
a method for optimizing an insulation structure of a converter transformer valve side bushing outlet device comprises the following steps:
determining factors influencing the insulation structure of a valve side sleeve outgoing line device of the extra-high voltage converter;
constructing an optimization objective function based on the factors;
constructing an evaluation function based on the optimization objective function;
optimizing the evaluation function by using the penalty function and the constraint condition to obtain an unconstrained evaluation function;
and solving the unconstrained evaluation function to obtain the weight of the optimized objective function.
Preferably, the evaluation function is:
wherein: f. ofi(x) To optimize the objective function; omegaiTo optimize the weights of the objective function.
Preferably, the factor includes the size of the oil clearance d1Thickness d of the barrier2The horizontal position D of the barrier and the cover-in depth L of the barrier, and the range of the factors is:
preferably, the optimization objective function includes a maximum electric field strength in the insulation shieldE1mTangential maximum electric field intensity | E of oil-paper interface of straight paper cylinder2mMaximum electric field intensity E in I, voltage-sharing ball coating3mMaximum electric field intensity E in the coated surface oil4mMaximum electric field intensity E along the epoxy surface of the capacitor core protection layer5mBushing capacitor core radial maximum field intensity E6mMaximum field intensity E of axial electric field at lower end of the sum pole plate7m。
Preferably, the constraint is 100mm<(d1+d2)<120mm。
Preferably, the unconstrained evaluation function is:
wherein: r1 and r2 are penalty function factors; v is the volume of the insulating barrier; gi (x) is a correlation function between max [1,100- (x1+ x2) ] and max [1, (x1+ x2) -120]
As a preferred aspect of the foregoing solution, solving the unconstrained evaluation function to obtain the weight of the optimization objective function includes:
determining the importance degrees of any two optimized objective functions by using a judgment matrix method;
establishing a judgment matrix based on the importance degrees of any two optimized objective functions;
and solving the judgment matrix by using mathematical calculus to obtain the weight of each optimized objective function.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses an optimization method of an insulation structure of a valve side sleeve outlet device of a converter transformer, which comprises the steps of determining factors influencing the insulation structure of the valve side sleeve outlet device of an extra-high voltage converter, constructing an optimization objective function based on the factors, constructing an evaluation function based on the optimization objective function, optimizing the evaluation function by utilizing a penalty function and constraint conditions to obtain an unconstrained evaluation function, solving the unconstrained evaluation function to obtain the weight of the optimization objective function and the like.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understandable, the following specific preferred embodiments are described in detail.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following embodiments are combined and preferred to describe the specific implementation modes, structures, characteristics and effects of the present invention in detail as follows:
the invention discloses an optimization method of an insulation structure of a converter transformer valve side bushing outlet device, which comprises the following steps:
determining factors influencing the insulation structure of a valve side sleeve outgoing line device of the extra-high voltage converter;
constructing an optimization objective function based on the factors;
constructing an evaluation function based on the optimization objective function;
optimizing the evaluation function by using the penalty function and the constraint condition to obtain an unconstrained evaluation function;
and solving the unconstrained evaluation function to obtain the weight of the optimized objective function.
Preferably, the evaluation function is:
wherein: f. ofi(x) To optimize the objective function; omegaiTo optimize the weights of the objective function.
Preferably, the factor includes the size of the oil clearance d1Thickness d of the barrier2The horizontal position D of the barrier and the cover-in depth L of the barrier,and the range of variation of the factor is:
preferably, the optimization objective function includes a maximum electric field intensity E in the insulation shield1mTangential maximum electric field intensity | E of oil-paper interface of straight paper cylinder2mMaximum electric field intensity E in I, voltage-sharing ball coating3mMaximum electric field intensity E in the coated surface oil4mMaximum electric field intensity E along the epoxy surface of the capacitor core protection layer5mBushing capacitor core radial maximum field intensity E6mMaximum field intensity E of axial electric field at lower end of the sum pole plate7mThe 7 optimized objective functions can reflect the electric field distribution condition and the engineering economy of the insulation structure of the valve side sleeve outgoing line device of the extra-high voltage converter, and the 7 optimized objective functions are along with the size d of the oil gap clearance1Thickness d of the barrier2The horizontal position D of the barrier and the shield penetration depth L of the barrier.
Furthermore, since the 7 optimization objective functions have different dimensions and different orders of magnitude, before constructing the evaluation function based on the optimization objective functions, normalization processing needs to be performed on the 7 optimization objective functions, that is:
wherein: v is the volume of the insulating barrier,
preferably, the constraint is 100mm<(d1+d2)<120mm。
Preferably, the unconstrained evaluation function is:
wherein: : r is1、r2Is a penalty function factor; v is the volume of the insulating barrier; gi(x) Is max [1,100- (x)1+x2)]And max [1, (x)1+x2)-120]The correlation function of (2).
As a preferred aspect of the foregoing solution, solving the unconstrained evaluation function to obtain the weight of the optimization objective function includes:
and determining the importance degrees of any two optimized objective functions by using a judgment matrix method.
It should be noted that: the judgment matrix method is an improved method of the relative comparison method and also belongs to an experience scoring method, and is characterized in that all indexes are listed to form an NxN square matrix, then each index is compared pairwise and scored, and finally the scores of each index are summed and normalized.
Establishing a judgment matrix based on the importance degrees of any two optimized objective functions, specifically in the invention, establishing the judgment matrix of the objective function by analyzing the important relation of each objective function, specifically as follows:
and solving the judgment matrix by using mathematical calculus to obtain the weight of each optimized objective function.
Specifically, the method comprises the following steps:
(1) each row of elements of the judgment matrix is normalized:
(2) adding the normalized judgment matrix by rows:
(3) will make opposite amount
Normalization:
the resulting vector w is equal to (w)1,w2,...,wn)TThat is, the obtained eigenvector, i.e., the hierarchical single-ordering result of the judgment matrix (i.e., the weight coefficient of each optimization objective function):
the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (2)
1. A method for optimizing an insulation structure of a converter transformer valve side bushing outlet device is characterized by comprising the following steps:
determining factors influencing the insulation structure of the valve side sleeve outgoing line device of the extra-high voltage converter transformer;
constructing an optimization objective function based on the factors;
constructing an evaluation function based on the optimization objective function;
optimizing the evaluation function by using the penalty function and the constraint condition to obtain an unconstrained evaluation function;
solving the unconstrained evaluation function to obtain the weight of the optimized objective function;
the merit function is:
wherein: f. ofi(x) To optimize the objective function; omegaiWeights for the optimization objective function;
factor includes oil clearance gap size d1Thickness d of the barrier2The horizontal position D of the barrier and the cover-in depth L of the barrier, and the range of the factors is:
optimizing the objective function including the maximum electric field strength E in the insulation shield1mTangential maximum electric field intensity | E of oil-paper interface of straight paper cylinder2mMaximum electric field intensity E in I, voltage-sharing ball coating3mMaximum electric field intensity E in the coated surface oil4mMaximum electric field intensity E along the epoxy surface of the capacitor core protection layer5mBushing capacitor core radial maximum field intensity E6mMaximum field intensity E of axial electric field at lower end of the sum pole plate7m；
Constraint of 100mm < (d)1+d2)＜120mm；
The unconstrained merit function is:
wherein: r is1、r2Is a penalty function factor; v is the volume of the insulating barrier; gi(x) Is max [1,100- (x)1+x2)]And max [1, (x)1+x2)-120]The correlation function of (2).
2. The optimization method of claim 1, wherein solving the unconstrained evaluation function to obtain the weights for the optimization objective function comprises:
determining the importance degrees of any two optimized objective functions by using a judgment matrix method;
establishing a judgment matrix based on the importance degrees of any two optimized objective functions;
and solving the judgment matrix by using mathematical calculus to obtain the weight of each optimized objective function.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105574266A (en) * | 2015-12-16 | 2016-05-11 | 西安交通大学 | Multi-population genetic algorithm based comprehensive optimization design method for electrical and mechanical performance of basin-type insulator |
| CN110188430A (en) * | 2019-05-20 | 2019-08-30 | 国网陕西省电力公司电力科学研究院 | Exchange the 330kV pendency equal laminated structure optimum design method of tower sectional composite insulator |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105574266A (en) * | 2015-12-16 | 2016-05-11 | 西安交通大学 | Multi-population genetic algorithm based comprehensive optimization design method for electrical and mechanical performance of basin-type insulator |
| CN110188430A (en) * | 2019-05-20 | 2019-08-30 | 国网陕西省电力公司电力科学研究院 | Exchange the 330kV pendency equal laminated structure optimum design method of tower sectional composite insulator |
Non-Patent Citations (1)
| Title |
|---|
| 一类带约束多目标优化问题的区间算法;刘梁等;《黑龙江科技学院学报》;20090131;第76-78页 * |
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