Abstract
Nanocellulose-modified presspaper is a promising solution to achieve cellulose insulation with better performance, reducing the risk of electrical insulation failures of a converter transformer. Predicting the dielectric properties will help to further design and improvement of presspaper. In this paper, a multivariable method was adopted to determine the effect of softwood fiber on the macroscopic performance of presspaper. Based on the parameters selected using the optimum subset method, a multiple linear regression was built to model the relationship between the fiber properties and insulating performance of presspaper. The results show that the fiber width and crystallinity had an obvious influence on the mechanical properties of presspaper, and fiber length, fines, lignin, and nanocellulose had a significant impact on the breakdown properties. The proposed models exhibit a prediction accuracy of higher than 90% when verified with the experimental results. Finally, the effect of nanocellulose on the breakdown strength of presspaper was taken into account and new models were derived.
Highlights
Presspaper is widely used in transformers because of the advantages of excellent performance, low cost, and environmental friendliness [1,2,3]
The P value is less than 0.05 for x2 and x13, indicating their strong relationship with the tensile strength of presspaper, and it is necessary for them to be included in the model
This paper explores the effect of microfiber characteristics on tensile strength and DC breakdown field strength of presspaper: 1
Summary
Presspaper is widely used in transformers because of the advantages of excellent performance, low cost, and environmental friendliness [1,2,3]. The prediction models of mechanical and electrical properties of presspaper mainly include theoretical analysis models, simulation models, and empirical models. Molecules 2018, 23, 1507 specific morphology of the microfibers; a simplified porous structure model of presspaper can be established using series or series-parallel units [9]. The former is mostly used for mechanical performance simulation analysis, and the latter is mostly used for electrical performance simulation analysis. Since the breakdown process is extremely complex, these models can only give qualitative conclusions rather than quantitative values These models do not involve the fiber characteristics and structural characteristics of presspaper. This study will provide a more reliable theoretical basis for the overall optimization of presspaper properties
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
