{"title":"Analytical Optimization of Surface-Inset Machines With Eccentric Three-Piece Halbach Magnets","authors":"Youyuan Ni, Kang Chen, Zhiwei Qiu","doi":"10.1109/CIEEC54735.2022.9846047","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846047","url":null,"abstract":"An analytical model of a surface-inset permanent magnet (PM) machine with eccentric three-piece Halbach magnets is proposed. An analytical optimization technique for the proposed model is used to obtain the optimal eccentric height that minimizes the total harmonic distortion (THD) of the air-gap flux density. Compared with the concentric model, the optimized eccentric model has the better electromagnetic performances including the back-electromotive force (EMF), the air-gap field and the electromagnetic torque. The presented analytical predictions are validated by a finite element analysis (FEA).","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124411072","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}
{"title":"The Pulsed Discharge within Bubbles in Dynamic PEF Treatment Chamber under Repetitive Pulses","authors":"Zhipeng Zhu, Guiquan Peng, Ruobing Zhang","doi":"10.1109/cieec54735.2022.9846230","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9846230","url":null,"abstract":"Pulsed electric field (PEF) is a promising non-thermal sterilization technology for liquid foods, and treatment chamber discharge is a bottleneck problem limiting its industrial application. Unlike the static treatment chamber, the pulsed discharge within bubble in the dynamic treatment chamber is influenced by the flow field, and the bubble evolution before discharge may be very different. In this paper, we focus on the differences and similarities between the dynamic and static treatment chambers of pulsed discharge within bubble under repetitive rectangular pulses by using plate electrodes, and study the morphology and subsequent development of the discharge arc within bubbles during pulsed discharge in the dynamic treatment chamber. Findings in this study may provide a reference for the pulse parameters and the selection of the flow rate in the PEF dynamic treatment chamber.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124427171","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}
{"title":"Research on Levitation Control of Stepped Rotor Type 12/14 Bearingless SRM","authors":"Zhenyao Xu, Jinyang Fu, Huijun Wang, Tiehang Yi, Zhihua Zhang","doi":"10.1109/cieec54735.2022.9846438","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9846438","url":null,"abstract":"The traditional 12/14 bearingless switched reluctance motor (BSRM) with hybrid stator poles cannot self-start at some specific rotor position due to the two-phase structure. The new stepped rotor type BSRM solves the problem of self-start of the motor by optimization of stator and rotor structure. Based on levitation force control scheme in the traditional BSRM, this paper studies the levitation force control scheme for the new stepped rotor type BSRM. According to the natural decoupling characteristics between levitation force and torque, the independent control scheme, including hysteresis current control method and current chopper control method, is proposed to realize the levitation force and torque control. The levitation and torque control adopts PID and PI controller, respectively, to adjust the error between each parameter and the given quantity. Finally, the correctness of the control strategy is verified by simulation results.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124498967","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}
{"title":"Research on Modeling and Simulation of Medium Voltage Shipboard Power System","authors":"Zixiao Xu, Hongwei Zhao, Li-quan He, Weilin Li","doi":"10.1109/CIEEC54735.2022.9846342","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846342","url":null,"abstract":"In order to improve the reliability and stability of the shipboard power system, this paper establishes a twelve-phase rectifier generator, speed control system model, excitation System model, generator set control model and load model library using modular modeling method. The working conditions of different typical loads of the shipboard power system are simulated in the Matlab/Simulink. The simulation results show that the established model can be compared systematically and accurately reflect the actual operation of the shipboard power system. At the same time, it can avoid the high cost and high risk of actual working conditions. The study has important reference significance for modeling and design modulation research of shipboard power system.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114446152","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}
Qi Qin, Liantao Ji, Longxiang Chen, Zhang Tao, Huan Xie
{"title":"Modeling and active power control strategy of wind-photovoltaic-pumped storage hybrid generation system","authors":"Qi Qin, Liantao Ji, Longxiang Chen, Zhang Tao, Huan Xie","doi":"10.1109/CIEEC54735.2022.9846494","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846494","url":null,"abstract":"Due to the randomness of wind speed and solar radiation intensity, lager-scale photovoltaic (PV) power station and wind farm connected to grid seriously affecting the stability of power system. With the advantage of flexible operation, quick start up and close down, pumped storage power station will be critical for renewable energy grid-connection in the future. In this paper, a wind-PV-pumped storage hybrid generation framework is put forward. The mathematical model which can reflect the generation characteristics of each unit is introduced. Based on the principle of low-pass filtering, an active power coordinated control strategy is designed to smooth power curves by filtering high frequency components of wind and solar power fluctuations. The proposed system is verified by MATLAB/Simulink software platform. The simulation results show that the control strategy is able to smooth out the fluctuation of renewable energy power output, and hybrid generation system can operate stably.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114457916","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}
{"title":"Study on flashover characteristics of vehicle train roof insulator under off-line overvoltage of bow mesh based on HANKE model","authors":"Zeng Han, Gong Yupeng, Zhu Yanjin","doi":"10.1109/CIEEC54735.2022.9846755","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846755","url":null,"abstract":"The article discusses whether the high-speed train roof insulators will flashover under the impact of the off-line overvoltage at the pantograph network in certain environment. Taking the epoxy resin insulator of the roof pantograph as the research object, establish a calculation and analysis model for the transient overvoltage which the roof high voltage system composed of the pantograph catenary, rail and integrated grounding system. A insulator flashover model also is established which considering the pollution distribution and high-speed airflow. The flashover characteristics on the insulator is obtained by combining the test wind tunnel and COMSOL simulation. This research provides a reference value for structural design and optimization based on improving the insulation performance of roof insulators.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114601595","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}
Jing Li, Dongjie Sun, Junyi Ma, Tao Da, Chang Liu, Tongtong Sui, Dahai Tang
{"title":"Research and Optimization of blocking schemes of Backup Power Switch-in equipment Using Bus-bar Differential Protection in 110kV Substations","authors":"Jing Li, Dongjie Sun, Junyi Ma, Tao Da, Chang Liu, Tongtong Sui, Dahai Tang","doi":"10.1109/cieec54735.2022.9846145","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9846145","url":null,"abstract":"The blocking schemes of backup power switch-in equipment using bus-bar differential protection under the enterprise standard Q/GDW10767 are likely to cause whole substation blackouts. In order to solve this problem, two configurations and setting schemes of 110kV power line protection were compared, and two blocking schemes of backup power switch-in equipment using bus-bar differential protection are analyzed in this paper, and the optimal solution is obtained by a combination of both. According to the analysis, the approach of equipping 110kV power supply lines with optical fiber current differential protection, and setting the protection range of power line protection (inter-phase distance protection I and grounding distance protection I) to cover 70%~80% of the whole power line is the most favourable solution. In addition, the method of tripping section breaker before tripping all the breakers in the faulty bus and only blocking the related breakers instead of all the 110kV breakers of backup power switch-in equipment is the most satisfying blocking scheme.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114717445","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}
{"title":"Analysis of magnetization process of nanocrystalline alloy under different external conditions","authors":"Kaihang Guo, L. Zou, Lingjun Dai, Li Zhang","doi":"10.1109/cieec54735.2022.9846091","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9846091","url":null,"abstract":"In order to study the relationship between the movement of magnetic moment and external magnetic field during magnetization of nanocrystalline alloy. Based on G. Herzer’s theory of stochastic anisotropy, a three-dimensional mesoscopic model of nanocrystalline alloy was established by using micromagnetic simulation software. Taking magnetic moment deflection angular velocity $omega$ as the research parameter, the magnetic moment deflection in the magnetization process of materials is quantitatively investigated, and the function expression between alternating magnetic field and $omega$ is obtained. The results show that $omega$ is negative, and its absolute value increases first and then decreases. At the same time, when the amplitude and frequency of external magnetic field increase, the value of $omega$ increases significantly. When external magnetic field is 20 kHz and 50mT, its $omega_{max}=0.5099{mathrm rad/ns}$; When frequency and amplitude are increased to 65 kHz, 95mT, $omega_{max}=1.9741{mathrm rad/ns}$, increased by 287.15%. Then, the function relation between $omega$ and amplitude, frequency is obtained, and verified by simulation results. It is found that the maximal error of the mean value occurs in 60kHz_90mT, and the relative error is 5.28%. The maximal error of maximum value occurs in 65kHz_95mT, and the relative error is 2.08%.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114923023","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}
{"title":"A Coordination Control Strategy Participating in Frequency Control for VSC-HVDC and LCC-HVDC","authors":"J. Li, Yongjun Xia, W. Yao, Q. Han, J. Wen","doi":"10.1109/CIEEC54735.2022.9846818","DOIUrl":"https://doi.org/10.1109/CIEEC54735.2022.9846818","url":null,"abstract":"This paper proposes a coordination control strategy participating in frequency control for the system interconnected by voltage source converter based high-voltage direct current (VSC-HVDC) inverter station and line commutated converter based high-voltage direct current (LCCHVDC) rectifier station. The strategy includes active power and reactive power coordination control for VSC-HVDC and LCCHVDC. The active power coordination control can improve the frequency stability of VSC-HVDC transmission network by reasonable switching additional frequency controllers. The reactive power coordination control can reduce the number of switching filters of LCC-HVDC and improve the voltage stability of power network during frequency regulation. Finally, an equivalent simplified model of practical grid is built in MATLAB/Simulink, and the effectiveness and adaptability of the additional frequency coordinated control strategy are verified by simulation.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"9 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927464","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}
{"title":"Adhesion Control of Bogie-Controlled Inner-city Trains","authors":"Song Wang, Zhen Shen, Jingchun Huang","doi":"10.1109/cieec54735.2022.9845938","DOIUrl":"https://doi.org/10.1109/cieec54735.2022.9845938","url":null,"abstract":"Adhesion control is an essential prerequisite to ensure safe operation of inner-city trains. Inner-city trains are operated jointly on the ground and underground. External factors, such as passenger capacity changes, different rail surface conditions, will cause inefficient traction of inner-city trains, low rate of adhesion utilization, and frequent idling. Aiming at these problems, an adhesion control method based on the optimal torque searching and receiving is proposed. Firstly, the dynamic model of inner-city trains is established according to the bogie-controlled characteristics of inner-city trains traction system. Secondly, the bogies are set as searching and receiving bogies, which adopt different adhesion control method respectively to realize the optimal adjustment of traction torque. Finally, real-time simulation based on two different track surface conditions is carried out on the Starsim platform to verify the effectiveness. Compared with traditional combined correction adhesion control method, the simulation results show that the proposed method increases average traction torque, increases average adhesion utilization, and decreases the idling times. When the inner-city train is unloaded, the average traction torque increases by 9.47 % and 11.51 %, the average adhesion utilization increases by 7.12 % and 8.38 %, the average idling times decreases by 57.14 % and 78.95 % respectively; When the inner-city train is overloaded, the average traction torque increases by 13.05 % and 19.27 %, the average adhesion utilization increases by 8.96 % and 13.54 %, the average idling times decreases by 55.56 % and 77.78 % respectively.","PeriodicalId":416229,"journal":{"name":"2022 IEEE 5th International Electrical and Energy Conference (CIEEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116239602","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}