Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method of Determining Traction Transformer Oil Index

A traction transformer and oil index technology, applied in special data processing applications, geometric CAD, calculation, etc., can solve problems such as large fluctuations, decreased accuracy of traction transformer oil temperature monitoring, and increased calculation errors

Active Publication Date: 2020-07-03
SOUTHWEST JIAOTONG UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traction transformers, due to the special working conditions in train operation, the operating load of traction transformers has the characteristics of steep amplitude changes, wide ranges of changes, and large fluctuations, which will directly lead to calculation errors in the "two-stage" temperature rise model increase, the monitoring accuracy of traction transformer oil temperature decreases

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method of Determining Traction Transformer Oil Index
  • A Method of Determining Traction Transformer Oil Index
  • A Method of Determining Traction Transformer Oil Index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be further described below.

[0040] The first step is to obtain the known structural and physical parameters of the traction transformer:

[0041] Height difference between cold and hot core Δh, winding height h w , Radiator height h r 、The thermal hydraulic diameter of the winding vertical oil passage D w , Radiator oil channel thermal hydraulic diameter D r , Oil specific heat capacity c oil , Air specific heat capacity c air , Oil density ρ oil , Air densityρ air , Oil thermal expansion coefficient β oil , Winding resistance coefficient f w 、The resistance coefficient of the radiator along the way f r , The total heat transfer coefficient U of the radiator, the circulation area of ​​the winding area A w , Radiator circulation area A r 、The effective heat dissipation area of ​​the radiator A R , Temperature difference index λ, ambient temperature T amb .

[0042] The second step is to solve the unknown unknown quantity, including: the volumet...

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

No PUM Login to View More

Abstract

The invention discloses a method for determining an oil index of a traction transformer, comprising the following steps: obtaining relevant structural and physical parameters of the traction transformer, calculating a waiting quantity of a top layer oil temperature rise by means of a global oil flow heat model, and performing regression calculation on the oil index according to relevant data suchas the temperature rise of the top layer oil and a load coefficient by using an oil index analytic model. Compared with the reference value recommended by the IEEE standard, the oil index calculated by the method of the invention is more suitable for rapid estimation of the temperature rise of the top layer oil of the traction transformer under multiple overloads, and is helpful for more accurateexplanation of the temperature rise change rule under a wide load range.

Description

Technical field [0001] The invention relates to the field of electrical insulation on-line detection and fault diagnosis, in particular to a method for determining the oil index of a traction transformer. Background technique [0002] Traction transformer is the core equipment of high-speed railway traction power supply system, and its efficient and safe operation plays a vital role in the operation and development of high-speed railway. The working life of the traction transformer depends on the internal insulation performance, and thermal aging is the main influencing factor of the deterioration of its insulation performance, so the working life of the traction transformer is closely related to the internal temperature rise. [0003] At present, the general method for determining the internal temperature rise of the transformer, including the temperature rise of the top oil and the temperature rise of the hot spots, is based on the "two-stage" temperature rise calculation formula...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F119/08
CPCG06F30/17G06F2119/08
Inventor 周利军唐浩龙王健王路伽黄林
Owner SOUTHWEST JIAOTONG UNIV