Feipeng Wang
Chongqing University
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Featured researches published by Feipeng Wang.
Journal of Nanomaterials | 2015
Bin Du; Jian Li; Feipeng Wang; Wei Yao; Shuhan Yao
Insulating oil modified by nanoparticles (often called nanofluids) has recently drawn considerable attention, especially concerning the improvement of electrical breakdown and thermal conductivity of the nanofluids. In this paper, three sized monodisperse Fe3O4 nanoparticles were prepared and subsequently dispersed into insulating vegetable oil to achieve nanofluids. The dispersion stability of nanoparticles in nanofluids was examined by natural sedimentation and zeta potential measurement. The electrical breakdown strength, space charge distribution, and several dielectric characteristics, for example, permittivity, dielectric loss, and volume resistivity of these nanofluids, were comparatively investigated. Experimental results show that the monodisperse Fe3O4 nanoparticles not only enhance the dielectric strength but also uniform the electric field of the nanofluids. The depth of electrical potential well of insulating vegetable oils and nanofluids were analyzed to clarify the influence of nanoparticles on electron trapping and on insulation improvement of the vegetable oil.
Journal of Nanomaterials | 2016
Youyuan Wang; Kun Xiao; Can Wang; Lijun Yang; Feipeng Wang
This paper focuses on the space charge characteristics in TiO2/cross-linked polyethylene XLPE nanocomposites; the unmodified and modified by dimethyloctylsilane MDOS TiO2 nanoparticles were added to XLPE matrix with different mass concentrations 1u2009wt%, 3u2009wt%, and 5u2009wt%. The scanning electron microscope SEM showed that the MDOS coupling agent could improve the compatibility between TiO2 nanoparticles and XLPE matrix to some extent and reduce the agglomeration of TiO2 nanoparticles compared with unmodified TiO2 nanoparticles; the volume resistivity testing indicated that the volume resistivity of TiO2/XLPE nanocomposites was higher than Pure-XLPE and increased with the increase of filling concentrations. According to the pulsed electroacoustic PEA measurements, it was concluded that the space charge accumulation was suppressed by filling TiO2 nanoparticles and the distribution of electric field in samples was improved greatly. In addition, it was found that the injection of homocharge was more obvious in MDOS-TiO2/XLPE than that in UN-TiO2/XLPE and the homocharge injection decreased with the increase of filling concentration.
AIP Advances | 2018
Zhengyong Huang; Xiuping Chen; Jian Li; Feipeng Wang; Ruiqi Zhang; Muhammad Ali Mehmood; Suning Liang; Tianyan Jiang
Natural esters, as the renewable resources, offer excellent physiochemical and dielectric properties such as the fire-resistance, high biodegradability and satisfactory dielectric breakdown performance. Thus, natural esters are selected as the insulation and heat dissipation medium for electrical equipment. However, the electrical performance of natural esters with different structures under the long gap and higher electrical stress needs further evaluations. In this paper, streamer propagation of various natural esters under the long gap and higher electrical stress were observed optically. The influence of voltage polarity, liquid types and gap distances on streamer characteristics of natural esters were analyzed. Results show that the maximum propagation velocity of streamer in natural esters is greater than that in the hydrocarbon liquids. Breakdown voltage of natural esters under negative polarity is much higher than that under positive polarity for the same gap distance. Among all the natural esters concerned, the camellia liquid demonstrates slower streamer velocity and slight greater lightning breakdown voltages for the positive and negative polarity. The lower content of unsaturation triacylglycerol molecules in camellia liquid contributes to the inhibition of ionization and streamers propagation. Results would be valuable reference for the design, manufacture and operation of the electrical equipment filled with natural ester.Natural esters, as the renewable resources, offer excellent physiochemical and dielectric properties such as the fire-resistance, high biodegradability and satisfactory dielectric breakdown performance. Thus, natural esters are selected as the insulation and heat dissipation medium for electrical equipment. However, the electrical performance of natural esters with different structures under the long gap and higher electrical stress needs further evaluations. In this paper, streamer propagation of various natural esters under the long gap and higher electrical stress were observed optically. The influence of voltage polarity, liquid types and gap distances on streamer characteristics of natural esters were analyzed. Results show that the maximum propagation velocity of streamer in natural esters is greater than that in the hydrocarbon liquids. Breakdown voltage of natural esters under negative polarity is much higher than that under positive polarity for the same gap distance. Among all the natural esters...
Physics Letters A | 2016
Jian Li; Bin Du; Feipeng Wang; Wei Yao; Shuhan Yao
Energies | 2017
Yachao Wang; Feipeng Wang; Jian Li; Zhengyong Huang; Suning Liang; Jinghan Zhou
Energies | 2018
Yachao Wang; Feipeng Wang; Jian Li; Suning Liang; Jinghan Zhou
ieee international conference on dielectrics | 2018
Muhammad Zeeshan Khan; Feipeng Wang; Jian Li; Muhammad Arshad Shehzad Hassan; Jawad Ahmad; Muhammad Ali Mehmood; Yushuang He
ieee international conference on dielectrics | 2018
Jawad Ahmad; Jian Li; Feipeng Wang; Zhengyong Huang; Muhammad Ali Mehmood; Muhammad Shoaib Bhutta; Muhammad Zeeshan Khan
international conference on dielectric liquids | 2017
Suning Liang; Jian Li; Lingte Chen; Feipeng Wang; Xiang Lin; Yachao Wang
international conference on dielectric liquids | 2017
Jian Li; Xiuping Chen; Yao Xu; Feipeng Wang; Xiang Lin; Suning Liang