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学者姓名：舒胜文
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Abstract ：
To realize passive vibration monitoring of power transformers, this study proposes a self-powered method for transformer vibration monitoring sensors based on the Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) piezoelectric bimorph array. This study conducts the theoretical analysis and field measurement of the transformer vibration signals. In addition, the preparation method of a high-performance Sm-doped PMN-PT piezoelectric bimorph is investigated. The properties of the xSm-PMN-yPT ceramics are also analyzed. Further, the output voltage and power characteristics of the piezoelectric bimorph arrays with different combinations are compared. Finally, the validation and application of the prototype are presented. The experimental results show that the 2.5%Sm-PMN-32PT has high piezoelectric coefficient (d33) of 1710 pC/N. The results also indicate that the piezoelectric self-powered device with the parallel structure consisting of nine piezoelectric bimorphs has a maximum power generation of 2.341 mW under the measured transformer vibration excitation. Moreover, it is shown that it takes 75 min to complete the charging of the 7.5 V-1 F faradic capacitor from 4.4 V to 5 V to satisfy the condition for the required energy of 2.82 J for the vibration signal acquisition, processing, and transmission, realizing the intermittent passive vibration monitoring of the transformer for 16 times per day. Therefore, the proposed method has a promising engineering application prospect. IEEE
Keyword ：
Circuit faults Circuit faults Energy harvesting Energy harvesting Monitoring Monitoring piezoelectric bimorph array piezoelectric bimorph array piezoelectric energy harvesting piezoelectric energy harvesting Power transformer Power transformer self-powered method self-powered method Sensors Sensors Sm-doped-PMN-PT Sm-doped-PMN-PT Transformer cores Transformer cores vibration monitoring sensors vibration monitoring sensors Vibrations Vibrations Windings Windings
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| GB/T 7714 | Shu, S. , Yu, R. , Qiu, H. et al. An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array [J]. | IEEE Sensors Journal , 2024 , 24 (16) : 1-1 . |
| MLA | Shu, S. et al. "An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array" . | IEEE Sensors Journal 24 . 16 (2024) : 1-1 . |
| APA | Shu, S. , Yu, R. , Qiu, H. , Shu, L. , Lu, Y. , Wang, Z. . An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array . | IEEE Sensors Journal , 2024 , 24 (16) , 1-1 . |
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Abstract ：
Converting mechanical vibration energy on the surface of power equipment into electrical energy by the way of piezoelectric energy harvesting is one of the effective ways to realize the passivity of power-specific sensors. However, the development trend of high integration and miniaturization of sensors has put forward higher requirements for piezoelectric energy harvesting. To this end, a new method for increasing the power of piezoelectric energy harvesting based on Sm-doped Pb(Mg1/3Nb2/3)O3-PbTiO3(Sm-PMN-PT) material and improved double intermediate capacitor harvesting(improved-DICH) interface circuit is proposed. Firstly, xSm-PMN-yPT piezoelectric bimorphs with different Sm doping ratios (x/%) and PT contents (y/%) are prepared, and the performance parameters of the piezoelectric materials are tested and compared. Secondly, on the basis of the comparative analyses of several typical interface circuits, an improved-DICH interface circuit is designed and the comparative analyses of energy harvesting are carried out from the theoretical point of view. Thirdly, the Multisim software is used to simulate and analyze the energy harvesting of different interface circuits. Finally, the energy harvesting power and energy harvesting efficiency of Sm-PMN-PT piezoelectric bimorphs and Pb(Zr1–xTix)O3 (PZT) piezoceramics under different interface circuits are tested comparatively. The results show that the piezoelectric energy harvesting device based on the 2.5%Sm-PMN-32%PT and improved-DICH interface circuit has the advantages of high output power of 516.3 μW, high energy harvesting efficiency of 61.1%, and strong load adaptability, hence has a bright prospect for engineering applications in energy harvesting. © 2024 Science Press. All rights reserved.
Keyword ：
interface circuit interface circuit piezoelectric energy harvesting piezoelectric energy harvesting power improvement power improvement power-specific sensor power-specific sensor Sm-doped PMN-PT Sm-doped PMN-PT
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| GB/T 7714 | Shu, S. , Yu, R. , Zhang, B. et al. Improvement Method of Piezoelectric Energy Harvesting Power Based on Sm-PMN-PT and Improved-DICH Interface Circuit; [基于 Sm-PMN-PT 和改进型 DICH 接口电路的压电取能功率提升方法] [J]. | High Voltage Engineering , 2024 , 50 (8) : 3448-3462 . |
| MLA | Shu, S. et al. "Improvement Method of Piezoelectric Energy Harvesting Power Based on Sm-PMN-PT and Improved-DICH Interface Circuit; [基于 Sm-PMN-PT 和改进型 DICH 接口电路的压电取能功率提升方法]" . | High Voltage Engineering 50 . 8 (2024) : 3448-3462 . |
| APA | Shu, S. , Yu, R. , Zhang, B. , Shu, L. , Lu, Y. , Wang, Z. . Improvement Method of Piezoelectric Energy Harvesting Power Based on Sm-PMN-PT and Improved-DICH Interface Circuit; [基于 Sm-PMN-PT 和改进型 DICH 接口电路的压电取能功率提升方法] . | High Voltage Engineering , 2024 , 50 (8) , 3448-3462 . |
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Abstract ：
Accurate evaluation for operating state of power transformer using big data and portrait technology is beneficial to ensure the safe and stable operation of power system. Aiming to the shortcomings of traditional condition evaluation methods, such as too single evaluation dimension and strong subjectivity, a construction method for transformer operating state portrait based on multi-dimensional capability and knowledge graph-multilayer perceptron (KG-MLP) is proposed. Firstly, the portrait system of transformer operation state is constructed, which is composed of insulation level, load capacity, anti-short circuit ability, energy efficiency level and voltage regulation capacity. Then, by combining the KG and MLP, a portrait analysis model of transformer operating state is built. Finally, according to the actual operation data of 1368 110kV transformers in a certain area, an example analysis of transformer operation state portrait is carried out. Also, the results are compared with those of Random Forest (RF) and Support Vector Machine (SVM) methods. The results show that the proposed method can accurately construct the transformer running state portrait with an accuracy of 96.35%, which is superior to RF algorithm (accuracy of 89%) and SVM algorithm (accuracy of 77%), providing a new way of evaluation for power transformer operating state. © 2024 Power System Technology Press. All rights reserved.
Keyword ：
Energy efficiency Energy efficiency Knowledge graph Knowledge graph Multilayers Multilayers Power transformers Power transformers Support vector machines Support vector machines Voltage regulators Voltage regulators
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| GB/T 7714 | Shu, Shengwen , Chen, Yangyang , Zhang, Ziqi et al. Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron [J]. | Power System Technology , 2024 , 48 (2) : 750-759 . |
| MLA | Shu, Shengwen et al. "Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron" . | Power System Technology 48 . 2 (2024) : 750-759 . |
| APA | Shu, Shengwen , Chen, Yangyang , Zhang, Ziqi , Fang, Shuqi , Wang, Guobin , Zeng, Jinglan . Construction Method for Transformer Operating State Portrait Based on Multi-dimensional Capability and Knowledge Graph-multilayer Perceptron . | Power System Technology , 2024 , 48 (2) , 750-759 . |
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Abstract ：
通过压电取能方式将电力设备表面的机械振动能转化为电能，是实现电力专用传感器无源化的有效途径之一。然而，传感器高集成度和小型化发展趋势对压电取能功率提出了更高要求。为此，提出一种基于钐掺杂铌镁酸铅-钛酸铅(Sm-doped Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3,Sm-PMN-PT)材料和改进型双中间电容回收(improved double intermediate capacitor harvesting,improved-DICH)接口电路的压电取能功率提升方法。首先，制备了不同Sm掺杂质量分数为x和PT质量分数为y的x Sm-PMN-y PT压电双晶片，并对压电材料的性能参数进行了测试和对比；其次，在对比分析几种典型接口电路的基础上，设计了一种改进型DICH接口电路，并从理论上进行了取能功率的对比分析；然后，采用Multisim软件对不同接口电路的取能功率进行了仿真分析；最后，对Sm-PMN-PT压电双晶片和锆钛酸铅(Pb(Zr_(1–x)Ti_x)O_3,PZT)压电陶瓷在不同接口电路下的取能功率和能量提取效率进行了对比测试。研究结果表明：基于2.5%Sm-PMN-32%PT材料和改进型DICH接口电路的压电取能装置具有516.3μW的高输出功率、61.1%的高能量提取效率和较强的负载适应性，在取能领域具有良好的工程应用前景。
Keyword ：
Sm掺杂PMN-PT Sm掺杂PMN-PT 功率提升 功率提升 压电取能 压电取能 接口电路 接口电路 电力传感器 电力传感器
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| GB/T 7714 | 舒胜文 , 俞若珺 , 张必震 et al. 基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法 [J]. | 高电压技术 , 2024 , 50 (08) : 3448-3462 . |
| MLA | 舒胜文 et al. "基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法" . | 高电压技术 50 . 08 (2024) : 3448-3462 . |
| APA | 舒胜文 , 俞若珺 , 张必震 , 舒龙龙 , 路永玲 , 王真 . 基于Sm-PMN-PT和改进型DICH接口电路的压电取能功率提升方法 . | 高电压技术 , 2024 , 50 (08) , 3448-3462 . |
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Abstract ：
To realize passive vibration monitoring of power transformers, this study proposes a self-powered method for transformer vibration monitoring sensors based on the Sm-doped-Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) piezoelectric bimorph array. This study conducts the theoretical analysis and field measurement of the transformer vibration signals. In addition, the preparation method of a high-performance Sm-doped-PMN-PT piezoelectric bimorph is investigated. The properties of the xSm-PMN-yPT ceramics are also analyzed. Further, the output voltage and power characteristics of the piezoelectric bimorph arrays with different combinations are compared. Finally, the validation and application of the prototype are presented. The experimental results show that the 2.5%Sm-PMN-32PT has a high piezoelectric coefficient (d(33)) of 1710 pC/N. The results also indicate that the piezoelectric self-powered device with a parallel structure consisting of nine piezoelectric bimorphs has a maximum power generation of 2.341 mW under the measured transformer vibration excitation. Moreover, it is shown that it takes 75 min to complete the charging of the 7.5 V-1-F faradic capacitor from 4.4 to 5 V to satisfy the condition for the required energy of 2.82 J for the vibration signal acquisition, processing, and transmission, realizing the intermittent passive vibration monitoring of the transformer for 16 times per day. Therefore, the proposed method has a promising engineering application prospect.
Keyword ：
Circuit faults Circuit faults Energy harvesting Energy harvesting Monitoring Monitoring Piezoelectric bimorph array Piezoelectric bimorph array piezoelectric energy harvesting piezoelectric energy harvesting power transformer power transformer self-powered method self-powered method Sensors Sensors Sm-doped-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) Sm-doped-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) Transformer cores Transformer cores vibration monitoring sensors vibration monitoring sensors Vibrations Vibrations Windings Windings
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| GB/T 7714 | Shu, Shengwen , Yu, Ruojun , Qiu, Han et al. An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array [J]. | IEEE SENSORS JOURNAL , 2024 , 24 (16) : 26354-26368 . |
| MLA | Shu, Shengwen et al. "An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array" . | IEEE SENSORS JOURNAL 24 . 16 (2024) : 26354-26368 . |
| APA | Shu, Shengwen , Yu, Ruojun , Qiu, Han , Shu, Longlong , Lu, Yongling , Wang, Zhen . An Efficient Self-Powered Method for Power Transformers Vibration Monitoring Sensors Based on the Sm-Doped-PMN-PT Piezoelectric Bimorph Array . | IEEE SENSORS JOURNAL , 2024 , 24 (16) , 26354-26368 . |
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In recent years, wireless sensor networks have been widely used in monitoring the operational status of power systems and other industrial production activities. The traditional battery power supply method has the disadvantages of high pollution, limited effective power supply lifespan, and the difficulty of replacing batteries. The piezoelectric energy harvesting method, which converts the mechanical vibration energy into electrical energy, has become a current research favorite. In this paper, a self-powered improved double intermediate diodes and capacitors (DIDC) interface circuit is designed. Firstly, theoretical analyses of improved DIDC interface circuit and some common interface circuits are provided. Then, the energy harvesting power and output voltage of different interface circuits in different load resistances are simulated and compared using Multisim software. The results show that the improved DIDC interface circuit has higher output power, output voltage and good load adaptability, which makes it a better prospect for engineering applications. © 2024 IEEE.
Keyword ：
energy harvesting energy harvesting interface circuits interface circuits piezoelectricity piezoelectricity vibration vibration
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| GB/T 7714 | Yu, R. , Shu, S. , Zhang, B. et al. Optimization Study on Piezoelectric Energy Harvesting Interface Circuit [未知]. |
| MLA | Yu, R. et al. "Optimization Study on Piezoelectric Energy Harvesting Interface Circuit" [未知]. |
| APA | Yu, R. , Shu, S. , Zhang, B. , Jin, B. , Lu, Y. , Wang, Z. . Optimization Study on Piezoelectric Energy Harvesting Interface Circuit [未知]. |
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Donor doping can increase the dielectric constant of a material by several orders of magnitude due to induced space charge causing interfacial polarization. Giant dielectric properties and interface polarization are also both expected to greatly enhance the flexoelectric behavior of a material. In this work, a typical flexoelectric ceramic material, BaTiO3, was selected and donor doped using elemental Nb. Compared with the nominal BaTiO3 ceramic, the dielectric constant and flexoelectric coefficient of the Nb-doped BaTiO3 ceramics were significantly improved. The transverse flexoelectric coefficient of 0.3 mol. % Nb-BaTiO3 was found to increase to nearly 40 times the nominal value, reaching 387 mu C/m. The results indicate that the giant dielectric response, and therefore the giant flexoelectric response, is the result of the combined effects of internal barrier-layer capacitance and surface barrier-layer capacitance. This study not only deepens the understanding of the semiconductor macro-dielectric effect and the flexoelectric mechanism caused by doping, but it also provides a feasible strategy for the design of giant dielectric/flexoelectric response materials and related devices with high dielectric constants and flexoelectric coefficients.
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| GB/T 7714 | Li, Hao , Wu, Hao , Wang, Zhiguo et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics [J]. | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
| MLA | Li, Hao et al. "Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics" . | APPLIED PHYSICS LETTERS 124 . 6 (2024) . |
| APA | Li, Hao , Wu, Hao , Wang, Zhiguo , Xie, Zhengqiu , Shu, Shengwen , Liu, Zhiyong et al. Space-charge-induced colossal dielectric constant and large flexoelectricity in Nb-doped BaTiO3 ceramics . | APPLIED PHYSICS LETTERS , 2024 , 124 (6) . |
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The thermal faults of GIS (Gas Insulated Switchgear) disconnect switch can lead to serious electrical accidents, and the temperature of the contacts is an important indicator for effectively detecting thermal faults. Therefore, conducting temperature field calculations for GIS is of great significance. In this paper, a multi-physics simulation calculation model is established for a 110 kV GIS disconnect switch. Firstly, electromagnetic simulation calculations are carried out to obtain the distribution of losses. Then, the calculated losses are coupled as heat sources to the temperature fluid field to obtain the temperature and flow field distribution. Based on this, temperature field analysis is further carried out for different contact resistance values in abnormal contact conditions. The results show that the temperature hotspots of the GIS disconnect switch are concentrated on the upper contacts of the disconnect switch. In the case of poor contact, the highest temperature point is 42.06% higher than that under normal working conditions. © Beijing Paike Culture Commu. Co., Ltd 2024.
Keyword ：
Electric switchgear Electric switchgear Electromagnetic simulation Electromagnetic simulation Temperature Temperature
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| GB/T 7714 | Zhang, Ziqi , Ruan, Jiangjun , Shu, Shengwen et al. Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies [C] . 2024 : 397-405 . |
| MLA | Zhang, Ziqi et al. "Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies" . (2024) : 397-405 . |
| APA | Zhang, Ziqi , Ruan, Jiangjun , Shu, Shengwen , Chen, Qiaofeng , Zhang, Chen , Deng, Yongqing . Multi-Physics Field Simulation Analysis of GIS Disconnect Switch Contact Temperature Considering Contact Anomalies . (2024) : 397-405 . |
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We have measured the flexophotovoltaic effect of single crystals of halide perovskites MAPbBr3 and MAPbI3, as well as the benchmark oxide perovskite SrTiO3. For halide perovskites, the flexophotovoltaic effect is found to be orders of magnitude larger than for SrTiO3, and indeed large enough to induce photovoltages bigger than the band gap. Moreover, we find that in MAPbI3 the flexophotovoltaic effect is additional to a native bulk photovoltaic response that is switchable and ferroelectric-like. The results suggest that strain gradient engineering can be a powerful tool to modify the photovoltaic output even in already well-established photovoltaic materials.
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| GB/T 7714 | Wang, Zhiguo , Shu, Shengwen , Wei, Xiaoyong et al. Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites [J]. | PHYSICAL REVIEW LETTERS , 2024 , 132 (8) . |
| MLA | Wang, Zhiguo et al. "Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites" . | PHYSICAL REVIEW LETTERS 132 . 8 (2024) . |
| APA | Wang, Zhiguo , Shu, Shengwen , Wei, Xiaoyong , Liang, Renhong , Ke, Shanming , Shu, Longlong et al. Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites . | PHYSICAL REVIEW LETTERS , 2024 , 132 (8) . |
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Wildfires have become an important factor threatening the safe and stable operation of transmission lines, and large-scale wildfires can significantly reduce the air gap insulation level of transmission lines and cause line tripping. Therefore, based on the principle of cellular automata and Wang Zhengfei's model of wildfire spread, this paper analyzes in detail the effects of factors such as slope, wind speed, wind direction, and fuel type on the speed of wildfire spread and the area of the fire site, and predicts the time when the wildfire arrives below the transmission line. The results indicate that the established model can preliminarily reflect the spread law of wildfires, and has a certain guiding role for the safe and stable operation of the power grid. © Beijing Paike Culture Commu. Co., Ltd 2024.
Keyword ：
Cellular automata Cellular automata Electric lines Electric lines Electric power transmission Electric power transmission Fires Fires Transmissions Transmissions Wind Wind
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| GB/T 7714 | Xu, Jun , Fang, Chaoying , Cao, Shiyun et al. Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines [C] . 2024 : 191-200 . |
| MLA | Xu, Jun et al. "Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines" . (2024) : 191-200 . |
| APA | Xu, Jun , Fang, Chaoying , Cao, Shiyun , Shu, Shengwen . Simulation Study on Spread Characteristics of Wildfire Near Transmission Lines . (2024) : 191-200 . |
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