CN105956340B - A kind of the geometrical model construction method and system of power transformer - Google Patents
A kind of the geometrical model construction method and system of power transformer Download PDFInfo
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Abstract
This application discloses the geometrical model construction methods and system of a kind of power transformer, this method comprises: carrying out structured grid division to the first kind component in power transformer in advance, it is correspondingly made available first group of geometrical model, and unstructured grid division is carried out to the second class component in power transformer, it is correspondingly made available second group of geometrical model, and first group of geometrical model and second group of geometrical model are saved to basic model library；It is provided for user and transfers instruction input interface, obtained user and transfer instruction by transferring the model of instruction input interface input during treating modeling power transformer and carrying out Geometric Modeling；Instruction is transferred using model, corresponding geometrical model is transferred from basic model library；According to the geometrical model transferred out, transformer model corresponding with power transformer to be modeled is constructed.The application realizes the purpose for efficiently and rapidly constructing the geometrical model of power transformer.
Description
Technical Field
The invention relates to the technical field of transformer model construction, in particular to a geometric model construction method and system of a power transformer.
Background
With the rapid development of social economy, the demand of people for electric power is increasing day by day. Power transformers are an important component of power systems and their development faces a number of challenges. From the development trend of the global power industry, high-capacity and ultra-high capacity are a main development direction of power transformers. However, the design means of the conventional power transformer has technical limitations and cannot adapt to the development trend of the current power transformer.
In order to improve and optimize the design means of the power transformer to adapt to the development trend of high capacity of the power transformer, people are trying to simulate the power transformer and then comprehensively research a three-dimensional finite element model and a multi-physical field model in a simulation model to efficiently solve the design problem existing in the high capacity power transformer. In the process of carrying out model simulation on the power transformer, a key point is to build a geometric model of the power transformer. The construction effect and the construction speed of the geometric model of the power transformer directly influence the overall simulation effect and the simulation speed of the power transformer. How to efficiently and quickly construct a geometric model of a power transformer is a problem to be solved at present.
Disclosure of Invention
In view of this, the present invention provides a method and a system for constructing a geometric model of a power transformer, which achieve the purpose of efficiently and quickly constructing the geometric model of the power transformer. The specific scheme is as follows:
a method for constructing a geometric model of a power transformer comprises the following steps:
carrying out structured grid division on a first type of component in a power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library;
providing a calling instruction input interface for a user, and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of geometric modeling of the power transformer to be modeled;
calling a corresponding geometric model from the basic model library by using the model calling instruction;
constructing a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model;
the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface.
Preferably, the process of structural meshing of the first type of component in the power transformer includes:
and carrying out structured grid division on the first members of the power transformer by utilizing ANSYS ICEM CFD Blocking technology.
Preferably, the process of structured meshing of the windings of the power transformer comprises:
and carrying out full hexahedral mesh division on the winding of the power transformer by using the ANSYS ICEM CFD Blocking technology, and reserving a gap between every two adjacent coil cake models in the winding.
Preferably, the process of unstructured meshing of the second type of component in the power transformer comprises:
and carrying out unstructured grid division on the second type of components in the power transformer by using an automatic block method.
Preferably, the process of constructing a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model includes:
providing a basic model modification interface for a user, and acquiring a model modification instruction input by the user through the basic model modification interface;
according to the model modification instruction, correspondingly modifying the exchanged geometric model so as to enable the modified model to be consistent with the actual structure of the corresponding component in the power transformer to be modeled;
and combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
The invention also discloses a system for constructing the geometric model of the power transformer, which comprises the following steps:
the basic model building module is used for carrying out structured grid division on a first type of component in the power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library;
the system comprises a calling instruction acquisition module, a model setting module and a model setting module, wherein the calling instruction acquisition module is used for providing a calling instruction input interface for a user and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of carrying out geometric modeling on a power transformer to be modeled;
the model calling module is used for calling a corresponding geometric model from the basic model library by using the model calling instruction;
the transformer model building module is used for building a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model;
the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface.
Preferably, the basic model building module includes:
the first-class model building submodule is used for carrying out structured grid division on a first-class component of the power transformer by utilizing ANSYS ICEM CFD Blocking technology;
and the second type model building submodule is used for carrying out unstructured grid division on a second type component in the power transformer by utilizing an automatic block method.
Preferably, the first type model construction sub-module includes:
and the winding model building unit is used for performing full hexahedron mesh division on the winding of the power transformer by using the ANSYS ICEM CFD Blocking technology and reserving a gap between every two adjacent coil cake models in the winding.
Preferably, the transformer model building module includes:
the modification instruction acquisition sub-module is used for providing a basic model modification interface for a user and acquiring a model modification instruction input by the user through the basic model modification interface;
the model modification submodule is used for correspondingly modifying the exchanged geometric model according to the model modification instruction so as to enable the modified model to be consistent with the actual structure of the corresponding component in the power transformer to be modeled;
and the model combination submodule is used for combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
In the invention, the geometric model construction method comprises the following steps: carrying out structured grid division on a first type of component in a power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library; providing a calling instruction input interface for a user, and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of carrying out geometric modeling on the power transformer to be modeled; calling a corresponding geometric model from the basic model library by using a model calling instruction; constructing a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model; the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface. Therefore, the invention carries out structured or unstructured grid division on the components in the power transformer in advance, stores the geometric models obtained after division into the basic model library, and calls corresponding geometric models from the basic model library to construct corresponding transformer models when the power transformer to be modeled needs to be geometrically modeled. That is, when a user needs to perform geometric modeling on a certain power transformer, the geometric models of all components do not need to be established from scratch with a great deal of effort, and the geometric model of the certain power transformer can be quickly obtained only by calling the corresponding geometric model from the basic model library; in addition, when the basic model library is established, the windings, the iron core main body, the oil conservators, the gas relays, the heat exchange tube main body and the box body main body are subjected to structured grid division, and the outer surface of the iron core, the outer surface of the heat exchange tube and the outer surface of the box body are subjected to unstructured grid division, so that the grid division treatment is beneficial to improving the subsequent simulation effect of the high-capacity power transformer on the aspects of heat transfer and oil flow surge characteristics. In conclusion, the invention achieves the aim of efficiently and quickly constructing the geometric model of the power transformer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method for constructing a geometric model of a power transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a geometric model construction system of a power transformer according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a method for constructing a geometric model of a power transformer, which is shown in figure 1 and comprises the following steps:
step S11: the method comprises the steps of carrying out structured grid division on a first type of component in the power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library.
The first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface. It is understood that the above core body refers to a portion of the core remaining after the outer surface is removed, and similarly, the heat exchange tube body refers to a portion of the heat exchange tube remaining after the outer surface is removed, and the tank body refers to a portion of the tank remaining after the outer surface is removed.
It should be further noted that the power transformer in step S11 is a pre-specified standard power transformer, and the power transformer includes a winding, an iron core, an oil conservator, a gas relay, a heat exchange tube, a tank, and other components, which are the most important components of the power transformer and are the main objects of the geometric model research of the power transformer.
Step S12: and providing a calling instruction input interface for a user, and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of carrying out geometric modeling on the power transformer to be modeled.
It is understood that the geometric model called by the model calling instruction is consistent with the main components in the power transformer to be modeled. For example, if the main components in the power transformer to be modeled are a winding, an iron core, a heat exchange tube and a tank, the corresponding model retrieving instruction is specifically used for retrieving geometric models such as a winding, an iron core main body, a heat exchange tube main body, a tank main body, an iron core outer surface, a heat exchange tube outer surface and a tank outer surface in the basic model library.
Step S13: and calling the corresponding geometric model from the basic model library by using the model calling instruction.
Step S14: and constructing a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model.
Therefore, in the embodiment of the invention, the structural or unstructured grid division is performed on the components in the power transformer in advance, the geometric models obtained after the division are stored in the basic model library, and when the geometric modeling of the power transformer to be modeled is required, the corresponding geometric models are called from the basic model library to construct the corresponding transformer models. That is, when a user needs to perform geometric modeling on a certain power transformer, the geometric models of all components do not need to be established from scratch with a great deal of effort, and the geometric model of the certain power transformer can be quickly obtained only by calling the corresponding geometric model from the basic model library; in addition, when the basic model library is established, the winding, the iron core main body, the oil conservator, the gas relay, the heat exchange tube main body and the box body main body are subjected to structured grid division, and the outer surface of the iron core, the outer surface of the heat exchange tube and the outer surface of the box body are subjected to unstructured grid division, so that the grid division treatment is beneficial to improving the subsequent simulation effect of the high-capacity power transformer on the aspects of heat transfer and oil flow surge characteristics. In conclusion, the embodiment of the invention achieves the purpose of efficiently and quickly constructing the geometric model of the power transformer.
The embodiment of the invention discloses a specific geometric model construction method of a power transformer, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, the method comprises the following steps:
in step S11 of the previous embodiment, the process of performing structured grid division on the first type of component in the power transformer specifically includes: the first type of component of the power transformer is structured gridded using ANSYS ICEM CFD Blocking technology.
It should be noted that ANSYS is a large-scale general finite element analysis software, and the software integrates the ICEM CFD software, wherein the ICEM CFD software is widely applied to the field of geometric model construction as a professional CAE preprocessing software (CAE).
More specifically, in this embodiment, the process of performing structured grid division on the winding of the power transformer includes: and carrying out full hexahedral mesh division on the winding of the power transformer by utilizing ANSYS ICEM CFD Blocking technology, and reserving a gap between every two adjacent coil cake models in the winding.
For example, the voltage regulating winding, the high voltage winding, the medium voltage winding and the low voltage winding in the power transformer are all subjected to hexahedral mesh division, a gap between every two adjacent voltage regulating coil cake models in the voltage regulating winding is set to be 6 mm, a gap between every two adjacent high voltage coil cake models in the high voltage winding is set to be 4 mm, a gap between every two adjacent medium voltage coil cake models in the medium voltage winding is set to be 4.25 mm, and a gap between every two adjacent low voltage coil cake models in the low voltage winding is set to be 4.5 mm.
In the embodiment, the ANSYS ICEM CFD Blocking technology can also be used for carrying out full hexahedron meshing on the iron core main body, the oil conservator, the gas relay, the heat exchange tube main body and the box main body in the power transformer.
Further, in step S11 of the previous embodiment, the process of performing unstructured grid division on the second type of component in the power transformer specifically includes: and carrying out unstructured grid division on the second type of components in the power transformer by using an automatic block method. The automatic block method can well control the aspect ratio of the grids and accurately capture the geometric curvature, and meanwhile, can ensure the orthogonality of the grids along the main flow direction and the main heat exchange direction, so that the requirements of a temperature boundary layer on the grids of a boundary layer can be met, and the requirements of a flow boundary layer on the grids of the boundary layer can also be met.
Under the condition that the model of the power transformer to be modeled is different from the model of the power transformer used for building the basic model library, the size proportion of components between the model and the power transformer is likely to be different, and in order to avoid adverse effects caused by the difference, the taken-out geometric model can be modified correspondingly in parameters, so that the modified geometric model is consistent with the actual size and structure of the corresponding components in the power transformer to be modeled. Specifically, in step S14 of the previous embodiment, the process of constructing a transformer model corresponding to the power transformer to be modeled according to the extracted geometric model may include the following steps S141 to S143; wherein,
step S141: and providing a basic model modification interface for a user, and acquiring a model modification instruction input by the user through the basic model modification interface.
It will be appreciated that the basic model modification interface is essentially a parameter modification interface through which the extracted geometric model can be modified accordingly.
Step S142: and correspondingly modifying the exchanged geometric model according to the model modification instruction so as to enable the modified model to be consistent with the actual structure of the corresponding component in the power transformer to be modeled.
Step S143: and combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
Correspondingly, the embodiment of the present invention further discloses a geometric model construction system of a power transformer, as shown in fig. 2, the system includes:
the basic model building module 21 is configured to perform structured meshing on a first-class component in the power transformer in advance to obtain a first group of geometric models correspondingly, perform unstructured meshing on a second-class component in the power transformer to obtain a second group of geometric models correspondingly, and store the first group of geometric models and the second group of geometric models to a basic model library;
the calling instruction acquisition module 22 is configured to provide a calling instruction input interface for a user, and acquire a model calling instruction input by the user through the calling instruction input interface in the process of performing geometric modeling on the power transformer to be modeled;
the model calling module 23 is configured to call a corresponding geometric model from the basic model library by using a model calling instruction;
the transformer model building module 24 is used for building a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model;
the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface.
Therefore, in the embodiment of the invention, the structural or unstructured grid division is performed on the components in the power transformer in advance, the geometric models obtained after the division are stored in the basic model library, and when the geometric modeling of the power transformer to be modeled is required, the corresponding geometric models are called from the basic model library to construct the corresponding transformer models. That is, when a user needs to perform geometric modeling on a certain power transformer, the geometric models of all components do not need to be established from scratch with a great deal of effort, and the geometric model of the certain power transformer can be quickly obtained only by calling the corresponding geometric model from the basic model library; in addition, when the basic model library is established, the winding, the iron core main body, the oil conservator, the gas relay, the heat exchange tube main body and the box body main body are subjected to structured grid division, and the outer surface of the iron core, the outer surface of the heat exchange tube and the outer surface of the box body are subjected to unstructured grid division, so that the grid division treatment is beneficial to improving the subsequent simulation effect of the high-capacity power transformer on the aspects of heat transfer and oil flow surge characteristics. In conclusion, the embodiment of the invention achieves the purpose of efficiently and quickly constructing the geometric model of the power transformer.
The embodiment of the invention discloses a specific geometric model construction system of a power transformer, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Specifically, the method comprises the following steps:
the basic model building module in the previous embodiment specifically includes a first-class model building submodule and a second-class model building submodule; wherein,
the first-class model building submodule is used for carrying out structured grid division on a first-class component of the power transformer by utilizing ANSYS ICEM CFD Blocking technology;
and the second type model building submodule is used for carrying out unstructured grid division on a second type component in the power transformer by utilizing an automatic block method.
Specifically, the first-class model building submodule includes: and the winding model building unit is used for performing full hexahedron meshing on the winding of the power transformer by utilizing ANSYSICEM CFD Blocking technology, and reserving a gap between every two adjacent coil cake models in the winding.
Further, the transformer model building module of the previous embodiment specifically includes a modification instruction obtaining sub-module, a model modification sub-module, and a model combination sub-module; wherein,
the modification instruction acquisition sub-module is used for providing a basic model modification interface for a user and acquiring a model modification instruction input by the user through the basic model modification interface;
the model modification submodule is used for correspondingly modifying the adjusted geometric model according to the model modification instruction so as to enable the modified model to be consistent with the actual structure of a corresponding component in the power transformer to be modeled;
and the model combination submodule is used for combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method and the system for constructing the geometric model of the power transformer provided by the invention are described in detail, specific examples are applied in the method for explaining the principle and the implementation mode of the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. A method for constructing a geometric model of a power transformer is characterized by comprising the following steps:
carrying out structured grid division on a first type of component in a power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library;
providing a calling instruction input interface for a user, and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of geometric modeling of the power transformer to be modeled;
calling a corresponding geometric model from the basic model library by using the model calling instruction;
constructing a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model;
the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface;
the process of constructing the transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model comprises the following steps:
providing a basic model modification interface for a user, and acquiring a model modification instruction input by the user through the basic model modification interface;
according to the model modification instruction, correspondingly modifying the exchanged geometric model so as to enable the modified model to be consistent with the actual structure of the corresponding component in the power transformer to be modeled;
and combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
2. The method for constructing a geometric model of a power transformer according to claim 1, wherein the step of performing structured meshing on the first type of components in the power transformer comprises:
and carrying out structured grid division on the first members of the power transformer by utilizing ANSYS ICEM CFD Blocking technology.
3. The method for constructing a geometric model of a power transformer according to claim 2, wherein the step of performing structured meshing on the windings of the power transformer comprises:
and carrying out full hexahedral mesh division on the winding of the power transformer by using the ANSYS ICEM CFD Blocking technology, and reserving a gap between every two adjacent coil cake models in the winding.
4. The method for constructing a geometric model of a power transformer according to claim 1, wherein said process of unstructured meshing a second class of components in said power transformer comprises:
and carrying out unstructured grid division on the second type of components in the power transformer by using an automatic block method.
5. A geometric model construction system for a power transformer, comprising:
the basic model building module is used for carrying out structured grid division on a first type of component in the power transformer in advance to correspondingly obtain a first group of geometric models, carrying out unstructured grid division on a second type of component in the power transformer to correspondingly obtain a second group of geometric models, and storing the first group of geometric models and the second group of geometric models to a basic model library;
the system comprises a calling instruction acquisition module, a model setting module and a model setting module, wherein the calling instruction acquisition module is used for providing a calling instruction input interface for a user and acquiring a model calling instruction input by the user through the calling instruction input interface in the process of carrying out geometric modeling on a power transformer to be modeled;
the model calling module is used for calling a corresponding geometric model from the basic model library by using the model calling instruction;
the transformer model building module is used for building a transformer model corresponding to the power transformer to be modeled according to the adjusted geometric model;
the first type of component comprises a winding, an iron core main body, an oil conservator, a gas relay, a heat exchange tube main body and a box body main body, and the second type of component comprises an iron core outer surface, a heat exchange tube outer surface and a box body outer surface;
wherein, the transformer model building module comprises:
the modification instruction acquisition sub-module is used for providing a basic model modification interface for a user and acquiring a model modification instruction input by the user through the basic model modification interface;
the model modification submodule is used for correspondingly modifying the exchanged geometric model according to the model modification instruction so as to enable the modified model to be consistent with the actual structure of the corresponding component in the power transformer to be modeled;
and the model combination submodule is used for combining all the modified models to obtain a transformer model corresponding to the power transformer to be modeled.
6. The geometric model construction system of a power transformer according to claim 5, characterized in that said base model construction module comprises:
the first-class model building submodule is used for carrying out structured grid division on a first-class component of the power transformer by utilizing ANSYS ICEM CFD Blocking technology;
and the second type model building submodule is used for carrying out unstructured grid division on a second type component in the power transformer by utilizing an automatic block method.
7. The power transformer geometric model building system according to claim 6, wherein the first-class model building submodule comprises:
and the winding model building unit is used for performing full hexahedron mesh division on the winding of the power transformer by using the ANSYS ICEM CFD Blocking technology and reserving a gap between every two adjacent coil cake models in the winding.
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| CN103851767A (en) * | 2014-03-12 | 2014-06-11 | 上海夏普电器有限公司 | Design method for condensation prevention of air outlet of air conditioning indoor unit |
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| CN105095609A (en) * | 2015-09-21 | 2015-11-25 | 武汉大学 | Transformer electromagnetic vibration noise calculating method based on finite element method |
| CN105205294B (en) * | 2015-11-04 | 2017-10-27 | 广东电网有限责任公司电力科学研究院 | A kind of finite element stimulation method of Transformer Winding electric capacity |
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