Simulation method for obtaining hot spot temperatures of power transformer under different working conditions
A power transformer, hot spot temperature technology, applied in design optimization/simulation, instrument, image data processing, etc., can solve problems such as aging of insulating materials, accelerated chemical reactions, failures and accidents of transformers not reaching expected life, and facilitate calculation Effect
Pending Publication Date: 2020-10-09
WEIHAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
View PDF5 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Oil-immersed transformers mainly use Class A insulation. During operation, the insulating material will age due to the influence of the environment and various physical and chemical effects. High temperature will directly cause the aging of the insulating material.
During the opera...
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0063] Below in conjunction with accompanying drawing, the present invention is described in detail
[0064] The invention is a simulation method for obtaining the temperature of hot spots under different working conditions of a power transformer. Based on the actual structure of the oil-immersed transformer, a three-dimensional simulation model of the temperature rise of the transformer is established by using the method of combining the finite element and the finite volume method. The influence of factors such as electromagnetic field and oil flow on temperature can realize the simulation of transformer hot spot temperature distribution. Specific steps are as follows:
[0065] 1. Establish a three-dimensional physical model of the power transformer
[0066] In the finite element software, the three-dimensional model of the transformer temperature field is established, such as image 3 As shown, when performing coupling analysis, an important feature of the internal structu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
The invention aims to provide a simulation method for obtaining hot spot temperatures of a power transformer under different working conditions. Based on the actual structure of an oil-immersed transformer, a three-dimensional simulation model of the temperature rise of the transformer is established by adopting a method of combining a finite element and a finite volume method, the influence of factors such as an electromagnetic field and oil flow on the temperature is considered, and the simulation of the hot-spot temperature distribution of the transformer is realized. The method comprises the following steps: S1, establishing a three-dimensional physical model of the power transformer; s2, performing theoretical analysis of electromagnetic field calculation of the power transformer; s3,calculating theoretical analysis of the fluid and the thermal field of the power transformer; s4, adding a corresponding physical field based on theoretical analysis of the electromagnetic field andfluid-solid heat; s5, performing field-circuit coupling connection under different working conditions according to actual operation conditions, and setting parameters and boundary conditions; s6, performing multi-physical field coupling setting; and S7, performing mesh generation on the model based on a finite element method, and performing simulation to obtain temperature distribution and hot spot temperature position results of the power transformer under different working conditions.
Description
technical field [0001] The invention belongs to the research field of load-carrying performance of electrical equipment, and relates to a simulation method for obtaining hot spot temperatures of power transformers under different working conditions. Background technique [0002] The key factors affecting the working state of power transformers in actual operation are their thermal problems and insulation problems. The temperature rise of the transformer is an important indicator to measure whether the transformer is in a safe and stable working state. Oil-immersed transformers mainly use Class A insulation. During operation, the insulating material will age due to the influence of the environment and various physical and chemical effects. High temperature will directly cause the aging of the insulating material. During the operation of power transformers, high temperature will accelerate the chemical reaction, and the mechanical strength and electrical strength of the insula...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more IPC IPC(8): G06F30/23G06T17/00G06F119/08
CPCG06F30/23G06T17/00G06F2119/08
Inventor 张卫东侯军于文牮姚晓林徐海林许春华叶俭江丽洪福吕彬刘腾李毅
Owner WEIHAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap