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学者姓名：郑昕
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Abstract ：
Micro grid fault of rapid detection and removal is the key to ensure its reliability. With the access of many distributed generations (DG) to the system, the characteristics of short-circuit faults of microgrids in grid-connected and islanded modes have changed, and the traditional protection methods can no longer be applied to both operating modes of microgrids simultaneously. Due to the advantages of wavelet energy spectrum in the identification of the mutation characteristics of the weak signal as well as that of neural network in the location accuracy, this paper proposes a short circuit fault detection and protection method in AC microgrids. The method takes the current at the detection point as the object of analysis, uses the wavelet energy spectrum transform to analyze the current waveforms under normal and fault operation states, and extracts the fault characteristic quantities. At the same time, considering the effect of transition resistance, a generalized fault area identification model for both grid-connected and islanded modes is established by using a neural network algorithm. Simulation and experimental results show that this method can realize accurate judgment and area location of short-circuit faults in different modes, different DG capacities, different fault types and different fault regions. IEEE
Keyword ：
Accuracy Accuracy Circuit faults Circuit faults Early detection Early detection Fault detection Fault detection Fault location Fault location Microgrid Microgrid Microgrids Microgrids Neural networks Neural networks Short-circuit fault Short-circuit fault Transforms Transforms Wavelet transforms Wavelet transforms
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| GB/T 7714 | Zheng, X. , Zhuang, D. , Venkatesh, B. . Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids [J]. | IEEE Transactions on Smart Grid , 2024 , 15 (6) : 1-1 . |
| MLA | Zheng, X. 等. "Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids" . | IEEE Transactions on Smart Grid 15 . 6 (2024) : 1-1 . |
| APA | Zheng, X. , Zhuang, D. , Venkatesh, B. . Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids . | IEEE Transactions on Smart Grid , 2024 , 15 (6) , 1-1 . |
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随着分布式电源(distributed generation,DG)的容量变化，微电网原有的供电结构发生改变，使得潮流大小、方向和功率结构发生变化，对快速检测和定位微电网中的短路故障区域提出了挑战。在MATLAB/Simulink中搭建低压交流微电网模型；通过高尺度小波能量谱算法对微电网与大电网公共连接点(point of common coupling,PCC)处检测到的电流进行分解，提取适应不同容量情况的短路故障特征值，实现了不同容量下微电网短路故障的早期检测；利用小波能量谱特征结合基于正交最小二乘法(orthogonal least square,OLS)的径向基函数(radial basis function,RBF)神经网络算法提出一种适用于不同容量微电网的短路故障区域定位方法，并进行仿真验证；在此基础上设计并网模式微电网短路故障保护硬件系统，并进行实验验证。结果表明，所设计的保护系统能够快速、准确地同时实现并网模式下交流微电网短路故障的早期检测与区域定位。
Keyword ：
区域定位 区域定位 小波能量谱 小波能量谱 并网模式微电网 并网模式微电网 径向基函数(RBF) 径向基函数(RBF) 早期检测 早期检测 正交最小二乘法(OLS) 正交最小二乘法(OLS) 短路故障 短路故障
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| GB/T 7714 | 郑昕 , 甘鸿浩 . 不同容量下并网模式交流微电网短路故障早期检测与区域定位 [J]. | 中国电机工程学报 , 2024 , 44 (11) : 4353-4367 . |
| MLA | 郑昕 等. "不同容量下并网模式交流微电网短路故障早期检测与区域定位" . | 中国电机工程学报 44 . 11 (2024) : 4353-4367 . |
| APA | 郑昕 , 甘鸿浩 . 不同容量下并网模式交流微电网短路故障早期检测与区域定位 . | 中国电机工程学报 , 2024 , 44 (11) , 4353-4367 . |
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In recent years, magnetic fluid and arc plasma simulation models based on local thermodynamic equilibrium have provided an important aid to the analysis of the arc characteristics of switching appliances. However, it has been shown that when the current is small, the arc as a whole is deviated from the local thermodynamic equilibrium, but a clear correspondence between the arc current and the thermodynamic state of the arc is not given, which largely reduces the reliability of the simulation model. In this paper, from the perspective of arc spectral analysis, we build an arc experimental platform with spectral measurement function. Through this platform, the atomic spectral line data of the carbon electrode in the arc gap at different currents are measured, and the electron density data are obtained by the Boltzmann plot method and the Stark broadening method. The measured results show that when the current is greater than 40A, the electron density of the arc-firing process reaches above l022/cm3, which is consistent with the recognized data (>1022/cm3) under the local thermal equilibrium. When the current is less than 40A under the same condition, with the increase of current, the arc electron density increases and tends to l022/cm3• The change of arc electron density indicates that the arc thermodynamic state is more inclined to the nonlocal thermodynamic equilibrium when the arc current is less than 40A. From this, we can get the inference that the thermodynamic state of low-voltage AC arc and the size of arc current have a corresponding relationship, when the current is greater than 40A, the arc as a whole is more inclined to the local thermodynamic equilibrium state, and vice versa is more inclined to the non-equilibrium state. © 2024 IEEE.
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| GB/T 7714 | Chen, L. , Zheng, X. , Zhao, X. et al. Experimental Study on Electron Density Change of Low Voltage AC Arc Under Different Currents [未知]. |
| MLA | Chen, L. et al. "Experimental Study on Electron Density Change of Low Voltage AC Arc Under Different Currents" [未知]. |
| APA | Chen, L. , Zheng, X. , Zhao, X. , Li, J. . Experimental Study on Electron Density Change of Low Voltage AC Arc Under Different Currents [未知]. |
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Arc fault is one of the important factors causing electric fire, and the prevention of arc fault is an effective means to reduce the occurrence of electricfire. High frequency arc fault signal is generated when arc fault occurs. Collecting and analyzing the high frequency arcfault signal can effectively detect whether arc fault occurs. In this paper, according to the characteristics of the phase difference of the winding output at different positions of the winding coil under the high-frequency current signal, the special-shaped winding coil current transformer(S-SWCCT) is made, and the output characteristics of Special-shaped winding coil with different turns under different frequency are analyzed experimentally. Finally, according to GB14287 standard, arcfault experiment is carried out and current signal is collected and analyzed The experimental results show that the sensor can effectively collect the high frequency signal of arcfault andfilter the lowfrequency signal in the line
Keyword ：
arc fault arc fault current transformer current transformer fault detection fault detection high frequency signal high frequency signal
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| GB/T 7714 | Huang, Hanlong , Zheng, Xin , Zhuang, Jielong et al. Research on the Application of Special -Shaped Winding Coil Current Transformer in Arc Fault Detection [J]. | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 , 2024 . |
| MLA | Huang, Hanlong et al. "Research on the Application of Special -Shaped Winding Coil Current Transformer in Arc Fault Detection" . | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 (2024) . |
| APA | Huang, Hanlong , Zheng, Xin , Zhuang, Jielong , Tang, Longfei . Research on the Application of Special -Shaped Winding Coil Current Transformer in Arc Fault Detection . | 2024 IEEE 19TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS, ICIEA 2024 , 2024 . |
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With the capacity change of distributed generation, the original power supply structure of microgrid has undergone modifications, altering the size, direction, and power flow configuration. This transformation poses a challenge in swiftly detecting and pinpointing the area of short-circuit faults within the microgrid.. In this paper, a low-voltage AC microgrid model is built in MATLAB/ Simulink. The current detected at the common connection point (PCC) between microgrid and large power grid is decomposed by high-scale wavelet energy spectrum algorithm, and the short-circuit fault eigenvalues suitable for different capacities are extracted, which realizes the early detection of short-circuit fault in microgrid under different capacities. By using wavelet energy spectrum characteristics and orthogonal least square (OLS)-radial basis function (RBF) neural network algorithm, a short-circuit fault location method suitable for microgrids with different capacities is proposed and verified by simulation. On this basis, the short-circuit fault protection hardware system of microgrid in grid connection mode is designed and verified by experiments. The results show that the designed protection system can quickly and accurately realize the early detection and regional location of short-circuit faults in grid-connected AC microgrid at the same time. ©2024 Chin.Soc.for Elec.Eng.
Keyword ：
early detection early detection grid-connected microgrid grid-connected microgrid orthogonal least square (OLS) orthogonal least square (OLS) radial basis function (RBF) radial basis function (RBF) regional location regional location short circuit fault short circuit fault wavelet energy spectrum wavelet energy spectrum
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| GB/T 7714 | Zheng, X. , Gan, H. . Early Detection and Regional Location of Short Circuit Fault for Grid-connected AC Microgrid With Different Capacity; [不同容量下并网模式交流微电网短路故障早期检测与区域定位] [J]. | Proceedings of the Chinese Society of Electrical Engineering , 2024 , 44 (11) : 4353-4366 . |
| MLA | Zheng, X. et al. "Early Detection and Regional Location of Short Circuit Fault for Grid-connected AC Microgrid With Different Capacity; [不同容量下并网模式交流微电网短路故障早期检测与区域定位]" . | Proceedings of the Chinese Society of Electrical Engineering 44 . 11 (2024) : 4353-4366 . |
| APA | Zheng, X. , Gan, H. . Early Detection and Regional Location of Short Circuit Fault for Grid-connected AC Microgrid With Different Capacity; [不同容量下并网模式交流微电网短路故障早期检测与区域定位] . | Proceedings of the Chinese Society of Electrical Engineering , 2024 , 44 (11) , 4353-4366 . |
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In order to solve the problem that the performance parameters of permanent magnet actuators are difficult to be identified and by computers and the multi-objective optimization problem, this paper proposes a multi-objective optimization method based on the surrogate model. Firstly, a surrogate model based on orthogonal least squares radial basis functions (OLS-RBF) is proposed to solve the problem of identifying the performance parameters of permanent magnet actuators. Then, for the multi-objective optimization problem, a novel elimination mechanism is proposed for NSGA-III to take the place of the original selection mechanism, which improves the diversity of the Pareto solution sets and reduces the running time of the algorithm. And combine it with the fitted surrogate model for multi-objective optimization. Finally, taking the electromagnetic needle selector with permanent magnets as an example, the feasibility of the method and the accuracy of the improved NSGA-III algorithm are verified by simulation, which lays the foundation for the general optimization design scheme of permanent magnet actuators. © 2024, Beijing Paike Culture Commu. Co., Ltd.
Keyword ：
Magnetic actuators Magnetic actuators Multiobjective optimization Multiobjective optimization Orthogonal functions Orthogonal functions Permanent magnets Permanent magnets Radial basis function networks Radial basis function networks
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| GB/T 7714 | Danyang, Ke , Xin, Zheng . Multi-objective Optimization of Permanent Magnet Actuator Based on Surrogate Model [C] . 2024 : 503-512 . |
| MLA | Danyang, Ke et al. "Multi-objective Optimization of Permanent Magnet Actuator Based on Surrogate Model" . (2024) : 503-512 . |
| APA | Danyang, Ke , Xin, Zheng . Multi-objective Optimization of Permanent Magnet Actuator Based on Surrogate Model . (2024) : 503-512 . |
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Abstract ：
Micro grid fault of rapid detection and removal is the key to ensure its reliability. With the access of many distributed generations (DG) to the system, the characteristics of short-circuit faults of microgrids in grid-connected and islanded modes have changed, and the traditional protection methods can no longer be applied to both operating modes of microgrids simultaneously. Due to the advantages of wavelet energy spectrum in the identification of the mutation characteristics of the weak signal as well as that of neural network in the location accuracy, this paper proposes a short circuit fault detection and protection method in AC microgrids. The method takes the current at the detection point as the object of analysis, uses the wavelet energy spectrum transform to analyze the current waveforms under normal and fault operation states, and extracts the fault characteristic quantities. At the same time, considering the effect of transition resistance, a generalized fault area identification model for both grid-connected and islanded modes is established by using a neural network algorithm. Simulation and experimental results show that this method can realize accurate judgment and area location of short-circuit faults in different modes, different DG capacities, different fault types and different fault regions.
Keyword ：
Accuracy Accuracy Circuit faults Circuit faults early detection early detection Fault detection Fault detection fault location fault location Microgrid Microgrid Microgrids Microgrids neural networks neural networks Neural networks Neural networks short-circuit fault short-circuit fault Transforms Transforms Wavelet transforms Wavelet transforms
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| GB/T 7714 | Zheng, Xin , Zhuang, Dou , Venkatesh, Bala . Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids [J]. | IEEE TRANSACTIONS ON SMART GRID , 2024 , 15 (6) : 5402-5414 . |
| MLA | Zheng, Xin et al. "Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids" . | IEEE TRANSACTIONS ON SMART GRID 15 . 6 (2024) : 5402-5414 . |
| APA | Zheng, Xin , Zhuang, Dou , Venkatesh, Bala . Research on Generic Diagnostic Methods for Short-Circuit Faults in AC Microgrids . | IEEE TRANSACTIONS ON SMART GRID , 2024 , 15 (6) , 5402-5414 . |
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随着新能源快速发展,光伏产业需求旺盛,在光伏电池串组件的生产过程中使用机器人成为必然选择.为解决光伏产业生产线中技术人员操作困难以及使用示教器上手难度大等问题,研究了基于Visual Studio对RobotStudio进行二次开发在光伏电池组件排版系统中的应用,以实现智能制造的工艺优化和效益提升.通过设计基于RobotStudio的仿真工作站环境,模拟了光伏电池生产线,利用PCSDK二次开发功能,开发了机器人排版上位机系统.该系统可根据生产线实际情况,实时监控机器人状态和生产数据并控制工作流程,可根据不同电池组件规格灵活调整排版布局,并在仿真软件与模拟平台上进行实测验证.通过该系统实现更高效、更精确、更易上手和更可持续的生产过程,为光伏电池组件制造行业发展提供了参考.
Keyword ：
ABB工业机器人 ABB工业机器人 PC SDK PC SDK 二次开发 二次开发 光伏电池组件 光伏电池组件
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| GB/T 7714 | 吴荣俊 , 郑昕 . 基于VS和ABB工业机器人的光伏电池组件智能排版系统设计 [J]. | 机电工程技术 , 2024 , 53 (12) : 141-145 . |
| MLA | 吴荣俊 et al. "基于VS和ABB工业机器人的光伏电池组件智能排版系统设计" . | 机电工程技术 53 . 12 (2024) : 141-145 . |
| APA | 吴荣俊 , 郑昕 . 基于VS和ABB工业机器人的光伏电池组件智能排版系统设计 . | 机电工程技术 , 2024 , 53 (12) , 141-145 . |
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Cable accessory has the interface formed by cross-linked polyethylene (XLPE)/silicone rubber (SiR), which is prone to surface discharge and thus causes the failure of cable system. This article conducts the simulated experiment of thermal-mechanical aging on the interface of XLPE/SiR. The interfacial breakdown and dielectric properties under different aging states are analyzed. It is found the interfacial aging process of XLPE can be divided into the recrystallization stage and the oxidation reaction stage. The former contributes to the interfacial roughness and thus the better insulating performance, whereas the latter leads to degradation of interface, and thus the worse insulating performance. In addition, combined with the established electric field model for the interface, the differences between thermal-mechanical aging and individual thermal aging on the interface are discussed. The sample under thermal-mechanical aging reaches the maximum interfacial breakdown voltage later than that under individual thermal aging, but their performance tends to be consistent in the later stage of aging. The change of interface microstructure and its effects on electric properties of cross-linked polyethylene/silicone rubber under thermal-mechanical aging.image
Keyword ：
cable accessory cable accessory cross-linked polyethylene cross-linked polyethylene interface interface physicochemical properties physicochemical properties thermal-mechanical coupling aging thermal-mechanical coupling aging
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| GB/T 7714 | Zhang, Tianfeng , Zhang, Yunxiao , Zheng, Xin et al. Mechanistic insights into the thermal-mechanical aging of the interface of cross-linked polyethylene/silicone rubber [J]. | JOURNAL OF APPLIED POLYMER SCIENCE , 2023 , 141 (12) . |
| MLA | Zhang, Tianfeng et al. "Mechanistic insights into the thermal-mechanical aging of the interface of cross-linked polyethylene/silicone rubber" . | JOURNAL OF APPLIED POLYMER SCIENCE 141 . 12 (2023) . |
| APA | Zhang, Tianfeng , Zhang, Yunxiao , Zheng, Xin , Lin, Wenxin , Zhang, Zenghui , Chi, Zhengnan et al. Mechanistic insights into the thermal-mechanical aging of the interface of cross-linked polyethylene/silicone rubber . | JOURNAL OF APPLIED POLYMER SCIENCE , 2023 , 141 (12) . |
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With the development of microgrid technology, short-circuit fault detection and location research has become a key link in the development of microgrid technology. In view of the limitation that the existing short-circuit fault protection schemes of micro grid do not consider the change of topology structure during the operation of micro grid, this paper simulates the short-circuit fault operation state of grid-connected AC microgrid considering the change of topology structure, and analyzes it by using the wavelet energy spectrum change method, proposes a short-circuit fault protection method that can adapt to the change of topology structure. © 2023 IEEE.
Keyword ：
Fault detection Fault detection Microgrids Microgrids Timing circuits Timing circuits Topology Topology
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| GB/T 7714 | Wen, Zhuofan , Zheng, Xin . Simulation Research on Short-Circuit Fault Protection of Grid-Connected AC Microgrid Considering Topology Change [C] . 2023 . |
| MLA | Wen, Zhuofan et al. "Simulation Research on Short-Circuit Fault Protection of Grid-Connected AC Microgrid Considering Topology Change" . (2023) . |
| APA | Wen, Zhuofan , Zheng, Xin . Simulation Research on Short-Circuit Fault Protection of Grid-Connected AC Microgrid Considering Topology Change . (2023) . |
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