Query：
学者姓名：张云霄
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
Abstract ：
Silicone rubber (SR) is extensively used as insulation for cable accessories, directly affecting their design and operation. The distinctive feature of cable accessory insulation, operating under mechanical stretching, has not received sufficient attention in relevant standards and research. This study investigates two essential electrical parameters of SR insulation: relative permittivity and AC breakdown strength, analysing and summarising their variations during mechanical stretching. By comparing the parameter variations of SR samples with different filler contents and matrix compositions, the microscopic stretching behaviour and performance change mechanisms under mechanical stretching are explored. The results reveal the tensile effect on SR insulation, demonstrating that as the stretching ratio increases, the relative permittivity decreases, whereas the AC breakdown strength shows an increasing trend. Increasing filler content and incorporating low molecular weight components suppress the tensile effect, whereas decreasing filler content has the opposite effect. Given the significant correlation between these two parameters, the orientation and elongation of molecular chains are considered the primary factors influencing the tensile effect on SR insulation. This insight proposes a novel approach to control and optimise the performance of cable accessory insulation.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Hu, Hao , Cao, Binlong , Zhang, Yunxiao et al. Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching [J]. | HIGH VOLTAGE , 2025 . |
| MLA | Hu, Hao et al. "Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching" . | HIGH VOLTAGE (2025) . |
| APA | Hu, Hao , Cao, Binlong , Zhang, Yunxiao , Liu, Yuhao , Jia, Zhidong . Study on Electrical Properties of Silicone Rubber Insulation for Cable Accessories Under Mechanical Stretching . | HIGH VOLTAGE , 2025 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The insulation performance of power equipment is compromised by the aging effects of various physical fields, which can lead to failure. This study investigates the impact of interface modification on the aging behavior of composite materials. Polydopamine (PDA) is employed to modify the surface of boron nitride nanosheets (BNNS), enhancing their compatibility with silicone rubber (SIR). Thermal-mechanical aging tests are performed to compare the aging properties of various materials. The experimental results demonstrate that PDA-modified BNNS significantly enhance the DC electrical and mechanical properties of BNNS/SIR composites. Additionally, the PDA-modified BNNS/SIR exhibits superior aging resistance under thermal aging conditions. Although there is a more pronounced decline in insulation properties under thermal-mechanical aging, the PDA-modified BNNS/SIR still demonstrates better aging resistance compared to the unmodified BNNS/SIR. This study provides insight into developing insulation composites with excellent aging inhibition characteristics.
Keyword ：
aging inhibition characteristics aging inhibition characteristics electrical properties electrical properties interfacial modification interfacial modification silicone rubber silicone rubber thermal-mechanical aging thermal-mechanical aging
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, Yunxiao , Wu, Chengfeng , Yan, Chenning et al. Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification [J]. | POLYMER COMPOSITES , 2025 . |
| MLA | Zhang, Yunxiao et al. "Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification" . | POLYMER COMPOSITES (2025) . |
| APA | Zhang, Yunxiao , Wu, Chengfeng , Yan, Chenning , Hu, Hao , Liu, Yuhao , Zhou, Yuanxiang . Aging Inhibition Characteristics of Boron Nitride Nanosheets/Silicone Rubber Considering Interfacial Modification . | POLYMER COMPOSITES , 2025 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The electrical property parameters are crucial elements in the design of cable accessories, emphasizing the significance of precisely understanding their operational characteristics. This study investigates the variations in the electrical properties of silicone rubber (SR) insulation under mechanical stretching. The distribution characteristics of relative permittivity and ac breakdown strength are determined based on the mechanical stretching state. Furthermore, the electric field strength and safety margin are calculated to assess the operational capability of cable accessories. Comparatively, the mechanical stretching effects lead to increased electric field strength and breakdown strength, ultimately enhancing the safety margins of cable accessories, with a noticeable impact as the stretching degree increases. These findings suggest that the cable accessories exhibit a higher safety level than initially anticipated and that mechanical stretching should be thoroughly considered in their design.
Keyword ：
Analytical models Analytical models Cable accessory Cable accessory electrical property parameters electrical property parameters Electric breakdown Electric breakdown Electric fields Electric fields Mechanical cables Mechanical cables Mechanical factors Mechanical factors mechanical stretching mechanical stretching Permittivity Permittivity Power cable insulation Power cable insulation Power cables Power cables Safety Safety silicone rubber (SR) silicone rubber (SR) Stress Stress
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Hu, Hao , Li, Xiaodong , Fan, Weinan et al. Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching [J]. | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2025 , 32 (2) : 1246-1249 . |
| MLA | Hu, Hao et al. "Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching" . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 32 . 2 (2025) : 1246-1249 . |
| APA | Hu, Hao , Li, Xiaodong , Fan, Weinan , Zhang, Yunxiao , Liu, Yuhao , Jia, Zhidong . Precise Operational Characteristics of Cable Accessories Considering Mechanical Stretching . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2025 , 32 (2) , 1246-1249 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The unclear understanding of the water diffusion behavior posts a big challenge to the manipulation of water absorption properties in epoxy resins. Herein, we investigated the water diffusion behavior and its relationship with molecule structures inside an epoxy resin mainly by the nonequilibrium molecular dynamics and experiments. It is found that at the initial rapid water absorption stage, bound water and free water both contribute, while at the later slow water absorption stage, free water plays a dominant role. The observed evolution of free water and bound water cannot be explained by the traditional Langmuir model. In addition, molecule polarity, free volume, and segment mobility can all influence the water diffusion process. Hence, the epoxy resin with low polarity and high molecular segment mobility is endowed with higher diffusion coefficients. The saturated water absorption content is almost dependent on the polarity. The understanding of how water diffuses and what decides the diffusion process is critical to the rational design of molecule structures for improving the water resistance in epoxy resin.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Yuhao , Lin, Ying , Zhang, Yunxiao et al. Understanding Water Diffusion Behaviors in Epoxy Resin through Molecular Simulations and Experiments [J]. | LANGMUIR , 2024 , 40 (9) : 4871-4880 . |
| MLA | Liu, Yuhao et al. "Understanding Water Diffusion Behaviors in Epoxy Resin through Molecular Simulations and Experiments" . | LANGMUIR 40 . 9 (2024) : 4871-4880 . |
| APA | Liu, Yuhao , Lin, Ying , Zhang, Yunxiao , Cao, Bin , Wu, Kangning , Wang, Liming . Understanding Water Diffusion Behaviors in Epoxy Resin through Molecular Simulations and Experiments . | LANGMUIR , 2024 , 40 (9) , 4871-4880 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Electrical tree degradation is one of the main causes of insulation failure in high-frequency transformers. Electrical tree degradation is studied on pure epoxy resin (EP) and MgO/EP composites at frequencies ranging from 50 Hz to 130 kHz. The results show that the tree initiation voltage of EP decreases, while the growth rate and the expansion coefficient increase with frequency. Moreover, the bubble phenomenon at high frequencies in EP composites is discussed. Combined with trap distribution characteristics within the material, the intrinsic mechanism of epoxy composites to inhibit the growth of the electrical tree at different frequencies is discussed. It can be concluded that more deep traps and blocking effect are introduced by doping nano-MgO into EP bulks, which can improve the electrical tree resistance performance of EP composites in a wide frequency range.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, Yunxiao , Lin, Wenxin , Zhou, Yuanxiang et al. Electrical tree degradation of MgO/epoxy resin composites at different voltage frequencies [J]. | HIGH VOLTAGE , 2024 , 9 (3) : 581-590 . |
| MLA | Zhang, Yunxiao et al. "Electrical tree degradation of MgO/epoxy resin composites at different voltage frequencies" . | HIGH VOLTAGE 9 . 3 (2024) : 581-590 . |
| APA | Zhang, Yunxiao , Lin, Wenxin , Zhou, Yuanxiang , Xing, Weiwei , Cheng, Jiayu , Teng, Chenyuan . Electrical tree degradation of MgO/epoxy resin composites at different voltage frequencies . | HIGH VOLTAGE , 2024 , 9 (3) , 581-590 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
The increasing voltage level of HVDC transmission requires the higher electrical performance of silicone rubber used in DC cable accessories. In order to explore the excellent DC electrical performance of the composite silicone rubber material, this paper prepared the modified silicone rubber filled with different mass fraction of polydopamine modified boron nitride nanosheets, and compared and analyzed the DC electrical performance of the composite silicone rubber under different filling quantities. The results show that the space charge accumulation of silicone rubber can be effectively inhibited by the filling of boron nitride nanosheets. The DC breakdown field strength of the sample increases first and then decreases with the increase of the filling amount, and reaches the maximum value when the filling amount is 15%, which is 23.2% higher than that of pure silicone rubber. The DC conductivity decreases first and then increases, and reaches the minimum value when the filling amount is 15%. In addition, when the filling amount is 15%, the tensile strength of the sample is increased by 38.3% compared with that of pure silicone rubber, and the elongation at break of the sample is reduced only by 2.7%, basically maintaining the original elongation at break. The DC electrical and mechanical properties of boron nitride nanosheet composite silicone rubber modified with polydopamine are significantly improved compared with those without modification. The comprehensive analysis shows that the composite has better comprehensive properties when the filling amount is 15%. © 2024 Science Press. All rights reserved.
Keyword ：
Boron nitride Boron nitride Cables Cables Filling Filling HVDC power transmission HVDC power transmission III-V semiconductors III-V semiconductors Nanosheets Nanosheets Nitrides Nitrides Silicon Silicon Silicone rubber Silicone rubber Tensile strength Tensile strength
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhou, Yuanxiang , Yan, Chenning , Zhang, Yunxiao et al. DC Electrical and Mechanical Properties of Silicone Rubber Modified by Boron Nitride Nanosheets [J]. | High Voltage Engineering , 2024 , 50 (1) : 302-312 . |
| MLA | Zhou, Yuanxiang et al. "DC Electrical and Mechanical Properties of Silicone Rubber Modified by Boron Nitride Nanosheets" . | High Voltage Engineering 50 . 1 (2024) : 302-312 . |
| APA | Zhou, Yuanxiang , Yan, Chenning , Zhang, Yunxiao , Zhu, Xiaoqian . DC Electrical and Mechanical Properties of Silicone Rubber Modified by Boron Nitride Nanosheets . | High Voltage Engineering , 2024 , 50 (1) , 302-312 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Biaxially oriented polypropylene (BOPP) film used in pulse film capacitors withstands high temperatures for a long time. This leads to frequent faults in pulse film capacitors, affecting the reliability of the pulse system. In this paper, the thermal aging tests of BOPP films at 100 degrees C for 10-80 days are carried out in this paper, and the physicochemical and electrical properties of the aging materials are characterized. The results show that more deep and shallow traps to BOPP films are introduced during the thermal aging process. With the increase in aging time, the breakdown field strength gradually decreases, and the conductivity decreases first and then increases. Under the action of thermal aging for a long time, the recrystallization of materials and the destruction of molecular chains by thermal aging are the main reasons for the increase of traps and the decrease of breakdown field strength. The former is dominant in the early stage of aging, and the latter is dominant in the late stage of aging. Therefore, the conductivity shows the law of slow decrease first and then rapid increase. The relevant research provides a theoretical foundation for the process improvement and life prediction of BOPP films.
Keyword ：
BOPP film BOPP film electrical properties electrical properties microscopy microscopy structure-property relationship structure-property relationship thermal aging thermal aging
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, Yunxiao , Zhang, Jiarui , Liu, Yuhao et al. Research insight into the change of aggregation structure of BOPP films and its influence on electrical properties under accelerated thermal aging [J]. | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (43) . |
| MLA | Zhang, Yunxiao et al. "Research insight into the change of aggregation structure of BOPP films and its influence on electrical properties under accelerated thermal aging" . | JOURNAL OF APPLIED POLYMER SCIENCE 141 . 43 (2024) . |
| APA | Zhang, Yunxiao , Zhang, Jiarui , Liu, Yuhao , Lin, Wenxin , Chi, Zhengnan , Zhang, Tianfeng et al. Research insight into the change of aggregation structure of BOPP films and its influence on electrical properties under accelerated thermal aging . | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (43) . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Accurate lifetime prediction of transformer oil-paper insulation is of great significance in ensuring the safe and stable operation of a power system. In this paper, the internal mechanism relationship between interfacial polarization and aging oil-paper insulation is analyzed based on a microscopic dielectric response mechanism. Based on a mixed polarization model, an equivalent circuit topology with an interfacial polarization branch is introduced on the basis of an extended Debye model, and the application of interfacial charge polarization characteristics in oil-paper insulation life prediction is explored. First, the universal relaxation polarization law behind the spectrum changes in the process of temperature rise is analyzed, and the recovery voltage polarization spectrum is reconstructed based on the mixed polarization model. Combined with the influence law of temperature on the principal time constant and model parameters, a calculation method for the activation energy of oil-paper insulation in a single temperature test is proposed. The frequency-temperature translation factor is constructed from the interface polarization capacitance. Secondly, the change rule of dielectric loss factor with the deepening of aging is analyzed, the internal relationship between loss peak shift and relaxation time of interfacial polarization is explored, and a new characteristic parameter in frequency domain, the interfacial polarization branch pole Ph2 is refined to characterize the polymerization degree content of oil-paper insulation. Finally, an oil-paper insulation life prediction model is constructed by combining interface polarization branch pole Ph2 , frequency-temperature translation factor and a loss accumulation dynamic equation, and the measured data of a transformer of different operating years are substituted into the model to verify its effectiveness. This provides a new idea for oil-paper insulation life prediction. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword ：
Activation energy Activation energy Capacitance Capacitance Dielectric losses Dielectric losses Equivalent circuits Equivalent circuits Forecasting Forecasting Frequency domain analysis Frequency domain analysis Insulation Insulation Oil filled transformers Oil filled transformers Polarization Polarization Poles Poles Polymerization Polymerization Topology Topology
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zou, Yang , Chen, Xiaoxuan , Zhang, Yunxiao et al. А lifе рrеdiсtiоn mеthоd оf trаnsfоrmеr оil-рареr insulаtiоn bаsеd оn intеrfасiаl сhаrgе роlаrizаtiоn сhаrасtеristiсs [J]. | Power System Protection and Control , 2024 , 52 (7) : 138-148 . |
| MLA | Zou, Yang et al. "А lifе рrеdiсtiоn mеthоd оf trаnsfоrmеr оil-рареr insulаtiоn bаsеd оn intеrfасiаl сhаrgе роlаrizаtiоn сhаrасtеristiсs" . | Power System Protection and Control 52 . 7 (2024) : 138-148 . |
| APA | Zou, Yang , Chen, Xiaoxuan , Zhang, Yunxiao , Lin, Jinjia , Lin, Xinliang . А lifе рrеdiсtiоn mеthоd оf trаnsfоrmеr оil-рареr insulаtiоn bаsеd оn intеrfасiаl сhаrgе роlаrizаtiоn сhаrасtеristiсs . | Power System Protection and Control , 2024 , 52 (7) , 138-148 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
电力变压器复合油纸绝缘状态的准确诊断对电力系统安全稳定运行以及设备自身运维具有重要指导意义.针对油纸绝缘介电响应少数特征量评估和未考虑系统随机性导致评估不准确的问题,提出基于灰色关联分析(grey relational analysis,GRA)与聚类云模型的评估方法.首先,基于回复电压法和扩展德拜模型提取5个相关特征量,建立油纸绝缘状态评估体系.然后,针对多特征量在反映绝缘状态的敏感性差异,采用组合赋权法综合 GRA 和改进层次分析法,避免了数据信息丢失,使权重分配更加合理.最后,利用云模型雾化特性反映数据随机性,全面考虑评估指标等级分类边界的随机性和模糊性后构建了聚类云模型隶属度选择器.通过多台不同糠醛含量变压器实测数据进行验证表明,该评估方法不仅能够准确反映变压器实际绝缘状态,而且能体现其劣化趋势,为检修策略的制定提供参考依据.
Keyword ：
改进层次分析法 改进层次分析法 时域响应 时域响应 模糊综合评估 模糊综合评估 油纸绝缘 油纸绝缘 灰色关联分析 灰色关联分析 聚类云模型 聚类云模型
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 邹阳 , 林锦茄 , 李安娜 et al. 基于灰色关联分析和聚类云模型的变压器油纸绝缘状态评估 [J]. | 电力系统保护与控制 , 2023 , 51 (21) : 35-43 . |
| MLA | 邹阳 et al. "基于灰色关联分析和聚类云模型的变压器油纸绝缘状态评估" . | 电力系统保护与控制 51 . 21 (2023) : 35-43 . |
| APA | 邹阳 , 林锦茄 , 李安娜 , 张云霄 . 基于灰色关联分析和聚类云模型的变压器油纸绝缘状态评估 . | 电力系统保护与控制 , 2023 , 51 (21) , 35-43 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
With the advancement of power electronics, power electronic devices need to bear the operating conditions of pulse width modulation (PWM) voltage with higher frequencies, higher amplitudes, and steeper pulse rising edges. Epoxy resin is extensively applied to packaging insulation materials due to its significant performance. However, its insulation performance under different pulse parameters of higher-frequency PWM waves still needs further research. This article compares and investigates the effect of different pulse rise times on the electrical tree growth characteristics of epoxy resin under the action of low-frequency and high-frequency PWM waves. Research has found that high frequency can promote the growth of electrical tree. Under the action of a unipolar square wave with an amplitude of 12 kV at room temperature, the growth rate of the epoxy resin electrical tree significantly increases when the frequency rises from 400 Hz to 10 kHz. At high frequency, both the horizontal and vertical growth rates of the electrical tree exhibit a nonlinear growing trend. Meanwhile, the pulse rise time has a significant impact on the morphology of the electrical tree. At low and high frequencies, there is a significant difference in the morphology of the electrical tree of epoxy resin as the pulse rise time increases. However, overall, the width of the electrical tree channel decreases bit by bit, and the color of the channel becomes lighter. © 2023 IEEE.
Keyword ：
Electric power systems Electric power systems Epoxy resins Epoxy resins Morphology Morphology Packaging materials Packaging materials Pulse width modulation Pulse width modulation
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Lin, Wenxin , Zhang, Yunxiao , Chi, Zhengnan et al. The Effect of Pulse Rising Edge on the Electrical Tree Growth Characteristics of Epoxy Resin at High-Frequency Square Wave [C] . 2023 : 6-10 . |
| MLA | Lin, Wenxin et al. "The Effect of Pulse Rising Edge on the Electrical Tree Growth Characteristics of Epoxy Resin at High-Frequency Square Wave" . (2023) : 6-10 . |
| APA | Lin, Wenxin , Zhang, Yunxiao , Chi, Zhengnan , Zhang, Zenghui , Zhang, Tianfeng , Zhang, Jiarui . The Effect of Pulse Rising Edge on the Electrical Tree Growth Characteristics of Epoxy Resin at High-Frequency Square Wave . (2023) : 6-10 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
