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2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)最新文献

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The State Evaluation of Power Transformers Based on Grey Target Theory And Simulated Annealing 基于灰色目标理论和模拟退火的电力变压器状态评估
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646161
Lin Yao, Dingyong Liu, Yu Du, Yang Liu, Shaowei Rao, Guoping Zou, Shiyou Yang
{"title":"The State Evaluation of Power Transformers Based on Grey Target Theory And Simulated Annealing","authors":"Lin Yao, Dingyong Liu, Yu Du, Yang Liu, Shaowei Rao, Guoping Zou, Shiyou Yang","doi":"10.1109/SCEMS52239.2021.9646161","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646161","url":null,"abstract":"A methodology of combining the grey target theory and simulated annealing (SA) to evaluate a transformer state is proposed. In the proposed methodology, the state evaluation model is developed from the grey target theory, and the dissolved gas analysis (DGA) data are chosen as the attributes of the model. Moreover, different weights are assigned to different attributes, and the SA is used to optimize the weights. Some engineering tested results of transformers states are used to verify the accuracy of the proposed methodology. The numerical results show the superiority of the proposed methodology.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130005825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Analysis of a Novel Integrated Starter-Generator Based on Brush DC Motor 基于有刷直流电动机的新型起动机-发电机的设计与分析
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646123
C. Ye, Kailun Du, K. Liu, Jianping Zhang, Yu Xiang, Ling Qin
{"title":"Design and Analysis of a Novel Integrated Starter-Generator Based on Brush DC Motor","authors":"C. Ye, Kailun Du, K. Liu, Jianping Zhang, Yu Xiang, Ling Qin","doi":"10.1109/SCEMS52239.2021.9646123","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646123","url":null,"abstract":"The conventional brushless integrated starter-generator used for the power supply system is driven by the power electronic converter, which would be composed of many controllable electronic switching devices in parallel when the system runs in high current conditions. As a result, it complicates the structure and control of the system, occupies the limited volume, and increases cost. Thus, a novel integrated starter-generator based on a conventional brush DC motor is proposed in this paper. It changes the concentrated stator winding of the DC motor to a distributed winding. At starting mode, the machine uses the stator winding as field winding and adopts an electric brush for commutation. At generating mode, the machine uses the rotor winding as field winding, and a slip ring is used to provide a DC excitation current. In this way, the machine can function as a DC motor and a synchronous generator. The basic structure and working principle of the machine are described in detail, and the feasibility of the scheme is verified by finite element analysis (FEA) results.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120946025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Correlation Analysis of Power User Behavior Based on Coupled Meteorological Factors 基于耦合气象因素的电力用户行为相关分析研究
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646162
Yixiao Li, Tianguang Lv, Xin Zhao, Jiyan Liu, Wen-jun Ju, Wanlei Xue
{"title":"Research on Correlation Analysis of Power User Behavior Based on Coupled Meteorological Factors","authors":"Yixiao Li, Tianguang Lv, Xin Zhao, Jiyan Liu, Wen-jun Ju, Wanlei Xue","doi":"10.1109/SCEMS52239.2021.9646162","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646162","url":null,"abstract":"In recent years, large-scale power outages caused by extreme weather conditions have occurred frequently at home and abroad. Hence, how to quickly and accurately use the massive data in the power grid to mine the correlation between meteorological factors and users' consumption behavior is of great significance. Especially in assisting subsequent power dispatching decisions, improving the power grid's ability to respond to extreme weather, and ensuring the reliability of power supply for important power users. In this situation, this paper combine The Random Matrix Theory and Pearson's Correlation Coefficient Theory, to further propose a new method of data mining. Firstly, calculate and select effective coupled meteorological indicators, and then calculate the Pearson correlation coefficient between the indicators and the load data. On this basis, a random matrix model is constructed, and its time-series linear characteristics such as empirical spectrum distribution conform to a variety of statistical theorems. Finally, complete the spectrum analysis, and then fully quantify the degree of coupled meteorological factors on the consumption behavior of users, and realize the effective combination of visualization and quantification. This paper aims to effectively extract the correlation characteristics, and serve for subsequent load forecasting and power system planning. The 2018 and 2019 summer data of a certain regional grid in my country are selected to verify the effectiveness of the proposed method.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131038760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-mode Drive Control System of Switched Reluctance Motor Based on a Novel $mathrm{N}+2$ Power Converter 基于新型$数学{N}+2$功率变换器的开关磁阻电机多模驱动控制系统
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646109
Zhiyong Kang, Yanfang Hu, Debo Sun
{"title":"Multi-mode Drive Control System of Switched Reluctance Motor Based on a Novel $mathrm{N}+2$ Power Converter","authors":"Zhiyong Kang, Yanfang Hu, Debo Sun","doi":"10.1109/SCEMS52239.2021.9646109","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646109","url":null,"abstract":"This paper proposes a multi-mode drive control system for 12/10-pole switched reluctance motor. The drive control system can operate in the six-phase mode, three-phase serial, and parallel operation mode by altering the control signals based on a novel $mathrm{N}+2$ power converter and it can decrease torque ripple and copper consumption by switching to the three-phase serial mode and expand the speed range by switching to the three-phase parallel mode. The mode-switching control scheme and simulation are performed to validate the proposed multi-mode drive scheme.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128479418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Integration of a Protection/Measurement Current Transformer based on Compensation Algorithm 基于补偿算法的保护/测量电流互感器集成
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646084
Jingmao Wen, Wei Chen, Xingchao Jiao, Min Wu, T. Zheng
{"title":"Integration of a Protection/Measurement Current Transformer based on Compensation Algorithm","authors":"Jingmao Wen, Wei Chen, Xingchao Jiao, Min Wu, T. Zheng","doi":"10.1109/SCEMS52239.2021.9646084","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646084","url":null,"abstract":"In this paper, a compensation algorithm for the integration of a protection/measurement current transformer is proposed, which can realize the accurate measurement of the grid current in both normal and fault situations. According to a real CT data and its hysteresis curve, two hyperbolic models can be established. In this way, the compensation algorithm can properly describe the exciting current by secondary current. It can improve the primary current measurement by secondary current and the calculated exciting current. The results indicate the proposed method can improve the accuracy of the CT and the measurement error meet the IEC standard, both in small load currents and large fault current scenarios. As a result, a CT not only can be used for power system protection at fault condition, but also for current measurement at normal operation situation.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125375883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Variable Speed Constant Frequency Small Hydropower System 变速恒频小水电系统设计
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646088
Hongjun Luo, Derong Luo, Litao Dai, Qiang Zhou
{"title":"Design of Variable Speed Constant Frequency Small Hydropower System","authors":"Hongjun Luo, Derong Luo, Litao Dai, Qiang Zhou","doi":"10.1109/SCEMS52239.2021.9646088","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646088","url":null,"abstract":"In this paper, the variable speed constant frequency technology is applied to the hydropower system and improved. The turbine side control system takes the speed as the control object and applies the maximum efficiency tracking control strategy (MPPT) to find the maximum output power point by changing the speed to ensure the maximum power output of the turbine; Abandoning the method of obtaining motor rotor position signal by using resolver in variable speed constant frequency small hydropower system, the speed information is calculated by using the sensorless rotor position detection method based on phase-locked loop, so as to connect the current inner loop and speed outer loop of variable speed constant frequency power generation system, combined with current decoupling control and SVPWM modulation algorithm, transmit electrical energy to the DC bus with maximum efficiency.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116069167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rotor Unbalanced Magnetic Pull Characteristics Properties in Synchronous Generators Due to Dynamic Air-gap Eccentricity Faults 动态气隙偏心故障引起的同步发电机转子不平衡磁拉力特性
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646099
Kai Sun, Yuling He, Minghao Qiu, Shuo Wang, Wenhao Zhang
{"title":"Rotor Unbalanced Magnetic Pull Characteristics Properties in Synchronous Generators Due to Dynamic Air-gap Eccentricity Faults","authors":"Kai Sun, Yuling He, Minghao Qiu, Shuo Wang, Wenhao Zhang","doi":"10.1109/SCEMS52239.2021.9646099","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646099","url":null,"abstract":"This paper presents a comprehensive analysis on the rotor UMP characteristics under dynamic air-gap eccentricity fault (DAGE) in synchronous generators. Different from other studies, this paper not only pays attention to the effect of the DAGE degree, but also considers the impact of the DAGE direction, on the rotor UMP at the meantime. In the work, the rotor unbalanced magnetic pull (UMP) model employs two primary factors, i.e., the eccentric rate and the angle between the center line of the rotor and the eccentric direction, to reflect the eccentric degree and the eccentric direction, respectively. The simulation results prove the validity of the qualitatively theoretical model on a synchronous generator. The study shows that the rotor UMP increases under the DAGE conditions and the increment of the rotor UMP is closely related to the eccentric direction.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117354375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical calculation of Permanent Magnet Flux Linkage and Winding Inductance of Mover Permanent Magnet Double Salient Reluctance Linear Machines 永磁双凸阻直线电机永磁通链及绕组电感解析计算
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646165
Huixian Zhang, Gaoqi Chen, Kunlun Zhang
{"title":"Analytical calculation of Permanent Magnet Flux Linkage and Winding Inductance of Mover Permanent Magnet Double Salient Reluctance Linear Machines","authors":"Huixian Zhang, Gaoqi Chen, Kunlun Zhang","doi":"10.1109/SCEMS52239.2021.9646165","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646165","url":null,"abstract":"Aiming at the nonlinear problem of permanent magnet flux linkage and winding inductance function in the mover permanent magnet double salient reluctance linear machine (MPM-DSRLM), which makes it impossible to establish an accurate mathematical model with a simple algorithm, an analytical method is studied to calculate air gap magnetic field by using the Schwarz-Christoffel (SC) mapping and combine single excitation flux linkage method and integral of the air gap magnetic field to calculate PM flux linkage, winding self-inductance and mutual inductance parameters. In the case of ignoring the saturation of iron core, the PM of MPM - DSRLM is firstly equivalent to line current. Then, the two-dimensional conformal transformation models for PM single excitation and winding current single excitation are established respectively. The air gap magnetic field on the surface of stator tooth is calculated through the SC Toolbox, and it's integrated to get the phase winding flux. Finally, according to the three-phase flux linkage equation, the PM flux linkage, the winding self-inductance and mutual inductance parameters are derived. By comparing the analytical calculation results with the two-dimensional finite element simulation results, it is found that the waveform trend and value of two methods are in good agreement, which makes the mathematical modeling of MPM-DSRLM more simplified and accurate.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123703327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Motor bearing fault diagnosis based on multi-feature fusion and PSO-BP 基于多特征融合和PSO-BP的电机轴承故障诊断
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646168
Yi Zhang, J. Qu, Xiaoyu Fang, Guojian Luo
{"title":"Motor bearing fault diagnosis based on multi-feature fusion and PSO-BP","authors":"Yi Zhang, J. Qu, Xiaoyu Fang, Guojian Luo","doi":"10.1109/SCEMS52239.2021.9646168","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646168","url":null,"abstract":"This paper proposes fault a diagnosis method based on the combination of multi-feature fusion, particle swarm optimization and BP neural network(PSO-BP). In this method, the vibration signal of motor bearing is decomposed by wavelet packet, then the fuzzy entropy of each frequency band is solved, and finally the mixed feature vector is formed with the kurtosis of the original signal, which is input into PSO-BP for fault diagnosis. The simulation experiment is carried out using bearing data from CWRU, and the results prove that this method can more effectively distinguish the types of motor bearing faults.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122794136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Torque Calculation of PMa-SynRM Using the Magnetic Equivalent Circuit 基于磁等效电路的永磁同步电动机转矩计算
2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS) Pub Date : 2021-12-01 DOI: 10.1109/SCEMS52239.2021.9646120
Zaixun Ling, K. Shuai, Cheng Cheng, Hao Chen, Jing-Jing Zheng, Jin Wang
{"title":"Torque Calculation of PMa-SynRM Using the Magnetic Equivalent Circuit","authors":"Zaixun Ling, K. Shuai, Cheng Cheng, Hao Chen, Jing-Jing Zheng, Jin Wang","doi":"10.1109/SCEMS52239.2021.9646120","DOIUrl":"https://doi.org/10.1109/SCEMS52239.2021.9646120","url":null,"abstract":"This paper proposes a torque analysis method for the design of PMa-SynRM. Firstly, an analytical model of the multilayer flux barrier structure of the rotor is established based on the magnetic equivalent circuit. To improve the calculation accuracy of the model, the effects of stator slotting and rotor magnetic bridge saturation are considered. Then, the analytical expression of the air gap flux density is derived and the output torque of the motor is calculated by the Lorentz force law, and the analysis results are verified by the finite element method. Finally, the torque performance of the motor under different flux barrier structures is compared through the analysis model.","PeriodicalId":327731,"journal":{"name":"2021 IEEE 4th Student Conference on Electric Machines and Systems (SCEMS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127501907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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