Gas diffusion behavior in green camellia insulating oils
Source abstract
Abstract
As a new environmentally friendly liquid dielectric material, vegetable insulating oil has been widely used in oil-filled power equipment. In oil-filled power equipment, ageing, faults of overheating and discharge cause the decomposition of insulating oil and insulating paper, resulting in dissolved gases in oils. The diffusion behavior of dissolved gases in oils is helpful for evaluation of health state of oil-filled power equipment. In this study, the molecular dynamics simulation based on polymer consistent force field (PCFF) is adopted to analyze diffusion processes of dissolved gases in camellia insulating oils. The diffusion coefficients and free volume of dissolved gases including hydrocarbons, carbon oxides and hydrogen are calculated. The diffusion trajectory of dissolved gases in oils are also given. In addition, impacts of gas species and temperature on molecular diffusion coefficients of oils were also studied. Results quantitatively describe the diffusion behavior of gases with different molecular weight in the oils under various temperatures. The research provides theoretic support for further application of vegetable insulating oils in power equipment.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Power Transformer Diagnostics and Insulation · High voltage insulation and dielectric phenomena · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University 1 , Chongqing 400044, China
Postdoctoral Research Station on Chemical Engineering and Technology, Chongqing University 2 , Chongqing 400044, China
State Grid Hebei Electric Power Research Institute 3 , Shijiazhuang, Hebei 050021, China
Chongqing University of Technology 4 , Chongqing 400044, China
Funding
111 Project of the Ministry of Education, China · National Natural Science Foundation of China · China Postdoctoral Science Foundation
References (30)
Show source-provided references
1. Understanding the ageing aspects of natural ester based insulation liquid in power transformer10.1109/tdei.2015.004744 ↗
2. Application of response surface methodology for optimizing the oxidative stability of natural ester oil using mixed antioxidants10.1109/tdei.2017.006221 ↗
3. A review on critical evaluation of natural ester vis-a-vis mineral oil insulating liquid for use in transformers: Part 110.1109/tdei.2015.005370 ↗
4. Influence of vegetable oil on the thermal aging of transformer paper and its mechanism10.1109/tdei.2011.5931054 ↗
5. Study on electrical aging life-time of vegetable oil-paper insulation
6. Characteristics of moisture diffusion in vegetable oil-paper insulation
7. Grey relational analysis for insulation condition assessment of power transformers based upon conventional dielectric response measurement10.3390/en10101526 ↗
8. Condition monitoring of vegetable oil insulation in in-service power transformers: some data spanning 10 years10.1109/mei.2017.7866678 ↗
9. Further studies of a vegetable-oil-filled power transformer10.1109/mei.2011.6025364 ↗
10. Gases dissolved in natural ester fluids under thermal faults in transformers
11. Dissolved gas analysis of alternative dielectric fluids under thermal and electrical stress
12. Gassing behavior of various alternative insulating liquids under thermal and electrical stress
13. Dissolved gas analysis for common transformer faults in soy seed-based oil10.1049/iet-epa.2010.0030 ↗
14. Modeling of early stage partial discharge and overheating degradation of paper-oil insulation10.1109/tdei.2014.6832282 ↗
15. Comparison of dissolved gases in mineral and vegetable insulating oils under typical electrical and thermal faults10.3390/en9050312 ↗
16. Partial discharge behaviours and breakdown mechanisms of ester transformer liquids under AC stress
17. A comparative study of DGA and PD test on mineral and biodegradable based transformer insulation oil
18. Partial discharge properties of ester oils having different molecular structures
19. A new dynamic model for propagation of characteristic gases in transformer oil-cellulose structures due to temperature variations
20. Modeling dynamic propagation of characteristic gases in power transformers oil-paper insulation10.1109/tdei.2007.369535 ↗
21. A study of the temperature-based dynamic nature of characteristic gases in oil-cellulose insulation systems10.1109/tdei.2007.344628 ↗
22. Research on the dissolved gas analysis of electrical fault simulation of natural ester insulating oils
23. Die berechnung optischer und elektrostatischer gitterpotentiale10.1002/andp.19213690304 ↗
24. Molecular dynamics simulation of diffusion behaviour of gas molecules within oil–paper insulation system10.1080/08927022.2013.788180 ↗
25. Derivation of force fields for molecular mechanics and dynamics from ab initio energy surface10.1073/pnas.85.15.5350 ↗
26. Derivation of class II force fields 1. Methodology and quantum force field for the alkyl functional group and alkane molecules10.1002/jcc.540150207 ↗
27. Molecular dynamics simulations of bulk native crystalline and amorphous structures of cellulose10.1021/jp0219395 ↗
28. Application of molecular dynamics simulations in molecular property prediction I: Density and heat of vaporization10.1021/ct200142z ↗
29. Electrostatic interactions in soft particle systems: mesoscale simulations of ionic liquids10.1039/c8sm00387d ↗
30. Thermodynamic criteria analysis for the use of taro starch spherical aggregates as microencapsulant matrix10.1016/j.foodchem.2018.03.130 ↗