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学者姓名：张云霄
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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
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| 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 . |
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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
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| 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 . |
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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.
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| 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 . |
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Cable accessories are critical components of cable lines, with their interface structure serving as a primary weak point in operational performance. Accurately measuring and assessing interfacial performance is paramount. Due to their destructive nature, existing insulating performance testing methods fail to assess the quality of cable accessory installations on-site effectively. This study presents a non-destructive airtightness testing method for assessing the interfacial performance of cable accessories. Based on the gas leakage characteristics, two airtightness indicators, namely leakage coefficient and withstand pressure, are defined and calculated to assess the sealing performance of the interface structure. Moreover, the proposed method is applied to interfaces with varying interfacial pressures and roughness levels, and compared with results obtained from existing insulating performance-focused evaluation systems. The comparative analysis reveals a strong correlation between airtightness and insulating performance indicators, confirming the feasibility and validity of the airtightness testing method. With its comprehensive advantages, the proposed method can be utilized for on-site quality assessment of installed cable accessories, providing a novel technological approach to enhance the operational capabilities of cable systems. © 1986-2012 IEEE.
Keyword ：
Cable sheathing Cable sheathing Electric breakdown Electric breakdown Nondestructive examination Nondestructive examination Phase interfaces Phase interfaces Surface roughness Surface roughness
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| GB/T 7714 | Hu, Hao , Xu, Wen , Fan, Weinan et al. A Non-Destructive Airtightness Testing Method for Assessing Interfacial Performance of Cable Accessories [J]. | IEEE Transactions on Power Delivery , 2025 , 40 (5) : 2585-2592 . |
| MLA | Hu, Hao et al. "A Non-Destructive Airtightness Testing Method for Assessing Interfacial Performance of Cable Accessories" . | IEEE Transactions on Power Delivery 40 . 5 (2025) : 2585-2592 . |
| APA | Hu, Hao , Xu, Wen , Fan, Weinan , Zhang, Yunxiao , Liu, Yuhao , Jia, Zhidong . A Non-Destructive Airtightness Testing Method for Assessing Interfacial Performance of Cable Accessories . | IEEE Transactions on Power Delivery , 2025 , 40 (5) , 2585-2592 . |
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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.
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| 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 . |
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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
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| 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 . |
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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
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| 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) . |
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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
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| 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 . |
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日益提升的高压直流输电电压等级对直流电缆附件用硅橡胶的电气性能提出了更高的要求,为了探究具有优良直流电气性能的复合硅橡胶材料,文中制备了填充不同质量分数的聚多巴胺修饰氮化硼纳米片改性硅橡胶,对比分析了不同填充量下复合硅橡胶的直流电气性能.结果表明:填充氮化硼纳米片可以有效抑制硅橡胶的空间电荷积聚现象,试样的直流击穿场强随填充量的提高呈现先增大后减小的趋势,在填充量(质量分数,下同)为15%时达到最大值,相比纯硅橡胶提升23.2%,直流电导率先减小后增大,在填充量为15%时取得最小值;除此之外,当填充量为15%时,试样的拉伸强度较纯硅橡胶提升了38.3%,试样的断裂伸长率仅下降2.7%,基本保持了原有的断裂伸长率;经聚多巴胺修饰的氮化硼纳米片复合硅橡胶相比于未经表面修饰的氮化硼纳米片复合材料,其直流电气和力学性能都有显著提高.综合分析,填充量为15%时复合材料具有较好的综合性能.
Keyword ：
力学性能 力学性能 氮化硼纳米片 氮化硼纳米片 电缆附件 电缆附件 直流电气性能 直流电气性能 硅橡胶 硅橡胶
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| GB/T 7714 | 周远翔 , 闫晨宁 , 张云霄 et al. 氮化硼纳米片改性硅橡胶的直流电气与力学性能 [J]. | 高电压技术 , 2024 , 50 (1) : 302-312 . |
| MLA | 周远翔 et al. "氮化硼纳米片改性硅橡胶的直流电气与力学性能" . | 高电压技术 50 . 1 (2024) : 302-312 . |
| APA | 周远翔 , 闫晨宁 , 张云霄 , 朱小倩 . 氮化硼纳米片改性硅橡胶的直流电气与力学性能 . | 高电压技术 , 2024 , 50 (1) , 302-312 . |
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基于回复电压极化谱提取特征参量是目前广泛应用的变压器油纸绝缘状态评估方法,但极化谱易受工况干扰、人工失误等因素影响而出现特征数据异常的情况,严重降低评估准确性.针对上述问题,该文提出了一种基于局部离群因子(LOF)和改进K最近邻(IKNN)的回复电压数据清洗方法.首先,选取回复电压极化谱的回复电压极大值Urmax、初始斜率Sr 与主时间常数tcdom 作为老化特征参量,并基于LOF算法对非标准极化谱中的异常特征量数据进行识别与筛除.其次,利用模糊C均值(FCM)聚类算法减小噪声点对KNN算法的干扰,并通过加权欧氏距离标度突出各特征量间的关联性,进而构建出基于IKNN的数据填补模型架构以实现特征缺失数据的填补.最后,代入多组实测数据验证所提数据清洗方法的实效性.结果表明,数据清洗后的状态评估准确率相较于原有数据上升了 50%左右,有效提高了变压器回复电压数据质量,为准确感知变压器运行状况奠定坚实的基础.
Keyword ：
回复电压极化谱 回复电压极化谱 局部离群因子算法 局部离群因子算法 改进K最近邻算法 改进K最近邻算法 油纸绝缘 油纸绝缘 特征数据清洗 特征数据清洗
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| GB/T 7714 | 陈啸轩 , 邹阳 , 翁祖辰 et al. 基于IKNN和LOF的变压器回复电压数据清洗方法研究 [J]. | 电子测量与仪器学报 , 2024 , 38 (2) : 92-100 . |
| MLA | 陈啸轩 et al. "基于IKNN和LOF的变压器回复电压数据清洗方法研究" . | 电子测量与仪器学报 38 . 2 (2024) : 92-100 . |
| APA | 陈啸轩 , 邹阳 , 翁祖辰 , 林锦茄 , 林昕亮 , 张云霄 . 基于IKNN和LOF的变压器回复电压数据清洗方法研究 . | 电子测量与仪器学报 , 2024 , 38 (2) , 92-100 . |
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