{"title":"Common-Mode Noise Modeling and Reduction for Multi-output dual-switch flyback converter","authors":"Dingkun Zhao, Xuejun Pei, Yi Yu, Jinzhou Yan","doi":"10.1109/CIEEC58067.2023.10166365","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10166365","url":null,"abstract":"Flyback converters are widely used in electronic products. At present, power electronics technology is developing in high frequency and miniaturization, arousing much attention on EMI issues. This paper uses an actual multi-output dual-switch flyback converter as an example to analyze its CM characteristic. Firstly, the displacement current expression of a transformer with both single-layer primary and secondary windings is derived, and the lumped model of a four-capacitance multi-winding transformer with two secondary grounds is further established. A CM noise cancellation capacitor is proposed to generate a reverse decimation current to cancel the CM noise current, which helps derive the cancellation capacitor expression. The experimental results verified the effectiveness of the CM model and CM noise reduction method of the flyback converter.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369205","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":"Investigation of Stator Spoke-Type Permanent Magnet Machine Considering Different Slot and Pole Combinations","authors":"Danrui Liu, Hui Yang, Qichu An, Yu-An Lu, Xijin Guo, Yuqing Wu","doi":"10.1109/CIEEC58067.2023.10166616","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10166616","url":null,"abstract":"This paper presents the slot design procedure and performance evaluation of a stator spoke-type (SSTPM) machine by combing the distinct advantages of simple rotor, good thermal management in stator permanent magnet (PM) machine, and flux-concentrating effect in spoke-type structure. In addition, since the PMs are located between the adjacent stator tooth tips, the parallel magnetic circuit relation between PM and armature reaction fields permits excellent demagnetization withstand capability of magnets. Firstly, the machine topology and operating principle are introduced, respectively. Afterwards, the feasible stator and rotor pole combinations for the proposed SSTPM machine are discussed. The electromagnetic performance of SSTPM machines with selected slot/pole combinations are evaluated and compared by using finite-element (FE) method. Finally, a 12/14-stator/rotor pole SSTPM machine prototype is manufactured and tested to verify the FE analysis.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132378983","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":"Active Disturbance Rejection Control for Precise Position Tracking of Shape Memory Alloy Actuators","authors":"Fengqiang Bai, Xiangjun Zhang, Yijie Wang, Dianguo Xu","doi":"10.1109/CIEEC58067.2023.10166613","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10166613","url":null,"abstract":"An active disturbance rejection control (ADRC) method for accurate position tracking of shape memory alloy actuators (SMAAs) with uncertain dynamics and disturbances is presented in this paper. It is difficult to achieve precise positioning of SMAAs because of its strong nonlinear characteristics due to its solid phase transition mechanism. To solve the problem that the SMAAs mechanism modeling is difficult and the nonlinear characteristics have adverse effect on the precise position control, a second order transfer function model is established through step response system identification. Furthermore, nonlinear active disturbance rejection controller (NLADRC) are used for accurate position tracking of SMAAs. The overshoot of step signal tracking is effectively inhibited by using a tracking differentiator (TD), and the uncertain dynamics and disturbances are estimated by a designed third order extended state observer (ESO). position tracking accuracy and response speed of the SMAA servo systems are improved by nonlinear error feedback controller (NEFC). The experimental results demonstrate that the present NLADRC scheme for SMAA servo systems can improve the control performance in the accurate position tracking.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132507537","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":"Parameter Identification for Wireless power transfer System via Primary Electrical Information","authors":"Bing Cheng, Liangzong He, Houxuan Liu, Le Li","doi":"10.1109/CIEEC58067.2023.10166004","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10166004","url":null,"abstract":"In order to avoid the potential safety issue caused by purely closed loop control strategy, accurate parameters identification process is necessary. However, too bulky auxiliary circuit and complex calculation process make identification difficult to execute. In this paper, a parameter identification method without additional components is proposed. The mutual inductance and primary self-inductance value can be estimated accurately with only rms value of primary voltages and currents. More importantly, proposed parameters identification method performances well when the primary current oscillates or distorts under bed operation state. Finally, an experimental platform is built to verify the feasibility of the proposed method.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130433290","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":"Probabilistic Energy Flow Algorithm for Integrated Energy Systems Based on Fuzzy C-means Clustering","authors":"Xiao Xi, Yang Gao, Ying Wang, Xiaojun Wang, Yizhi Zhang, Weitao Chen","doi":"10.1109/CIEEC58067.2023.10167426","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10167426","url":null,"abstract":"Integrated energy systems is an effective way to achieve carbon neutrality by improving the utilization of renewable energy through the synergistic complementation of multiple energy sources. At present, hard clustering algorithm such as K-means clustering is usually used for clustering in the probabilistic flow calculation of power system, but they will bring some error in the multi-energy coupling scenarios with multiple uncertain variables. Therefore, in this paper, we consider the uncertainty of renewable energy and multiple energy loads to model and apply the fuzzy C-means clustering algorithm in probabilistic energy flow calculation for the integrated energy systems of electricity, heat and gas. First, establish a hybrid energy flow model of the integrated energy systems considering the uncertainty and relevance of renewable energy and multiple energy loads. Then the cumulant method is used to solve the probabilistic energy flow and the fuzzy C-means clustering algorithm is used to cluster the scenarios and reduce the linearization error. Finally, the simulation analysis of the actual case shows the accuracy of the probabilistic energy flow calculation applying the fuzzy C-means clustering algorithm.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134206496","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":"Investigation of A Two-Dimensional Model for Cogging Torque Calculation in Homopolar Inductor Machines","authors":"Yufei Wang, Guomin Zhang","doi":"10.1109/CIEEC58067.2023.10167419","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10167419","url":null,"abstract":"Since homopolar inductor machines (HIMs) have a three-dimensional (3-D) magnetic circuit, the researchers usually build a 3-D finite element model (FEM) to accurately predict the HIM cogging torque, which is very time-consuming. To solve this problem, a two-dimensional (2-D) FEM is proposed in this paper. Firstly, the analytical expressions of the HIM cogging torque are derived. Based on the cogging torque expressions, the equivalent principles between 3-D and 2-D FEM are investigated. According to the equivalent principles, the 2-D FEM used for computing the HIM cogging torque can be obtained. To display the 2-D model more vividly, a 48-slot/4-tooth (48 $S 4T$) permanent magnet (PM) HIM is exampled and its 2-D FEM is proposed. The 2-D FEM of the 48S4T PM HIM is excited by a field winding. The structure, turn number of field winding and field current amplitude of the 2-D model are illustrated in detail. Furthermore, the differences between the existing 2-D and the proposed 2-D FEM are analyzed. Finally, the cogging torque in the 48 $S 4T$ PM HIMs with different rotor tooth-arc to tooth-pitch ratios is computed by their 3-D, existing 2-D and proposed 2-D FEMs, respectively. The results indicate that, compared with the existing 2-D FEM, the proposed 2-D FEM can effectively save the computation time and has the similar computation accuracy as the 3-D FEM. The experimental verification is also carried out on a prototype of the 48 $S 4T$ PM HIM. The error between the maximum cogging torque obtained by the proposed 2-D FEM and the experiments is only 2.12%","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134216695","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":"Reliability-oriented Component Criticality Analysis of Distribution Systems Based on Graph Theory","authors":"Xu Rong, Yuxiong Huang, Gengfeng Li, Z. Bie","doi":"10.1109/CIEEC58067.2023.10165696","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10165696","url":null,"abstract":"Severe power outages of distribution systems are usually first caused by the failure of a single component. Hence the analysis of critical components is very important for the reliable operation of distribution systems. This paper proposed a reliability-oriented component criticality analysis method for distribution systems based on graph theory. Specifically, a framework of analyzing the component criticality is proposed firstly based on the Monte Carlo simulation. The sensitivity of distribution system reliability indices to the fault parameters of vulnerable components is used to formulate the component criticality indices. Then, combining with the distribution system graph model, the topology structure of distribution systems is converted into a graph model. The zone partitioning and minimal path searching is applied to access the reliability-oriented criticality of components. Finally, the proposed method is applied to Roy Billinton Test System (RBTS) bus2 to validate the effectiveness of our proposed method.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134537011","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}
Jianxin Zhou, Yunlong Wang, Jingrong Zheng, Fei You
{"title":"Evolution Behaviors and Properties of Power Compartment Fires in Underground Urban Utility Tunnels-A Review","authors":"Jianxin Zhou, Yunlong Wang, Jingrong Zheng, Fei You","doi":"10.1109/CIEEC58067.2023.10165832","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10165832","url":null,"abstract":"In this review, a comprehensive definition for an underground urban utility tunnel UUUT is given to reflect its inherent quality, unique features and latent fire safety issues. Following this, major fire hazards and high fire risks inside power compartments are analyzed. Based on this, international related reported fire accidents are counted and described. Such situation calls for special, systematic and deep researches of these fires. Typical international studies of power compartment fires are hereafter summarized in their main cases, contents, important results and conclusions. However, current researches are far from enough to understand power compartment fires fundamentally and practically. Therefore, seven primary future directions are proposed.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133923516","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":"Evaluation of Investment Benefits for the Incremental Distribution Network based on System Dynamics","authors":"Xiaomeng Zhai, Jingyi Wang, Delv Zhu, Min Cang, Qiu Wang, Shuang Wu","doi":"10.1109/CIEEC58067.2023.10167293","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10167293","url":null,"abstract":"Penetration level of distributed power sources in the incremental distribution network (IDN) has continued to rise. How to clarify the dynamic relationship among various participants in the IDN and analyze the influencing factors that affecting investment benefits has become the key to the planning, investment, and operation of the IDN. This paper thus establishes a multi-agent competitive evaluation model of investment benefits for the IDN with the distributed renewable energy under multiple scenarios based on the system dynamics modeling. The economic evaluation is carried out through the indicators of net present value and the rate of net present value. Sensitivity analysis is then carried out on key parameters including electricity wheeling tariffs, the electricity consumption by large industrial customers, and the electricity sale price for large industrial customers. The model can be used to scientifically analyze the investment benefits of IDNs with distributed power supply, provide suggestions for the collaborative development of IDN and renewable energy, and provide decision-making basis for capital investment in IDNs.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134275036","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 the adaptability of traction power supply system under the operation of high density heavy haul train","authors":"N. Xiang, Qiankun Yuan, Chaoqun Wang","doi":"10.1109/CIEEC58067.2023.10166866","DOIUrl":"https://doi.org/10.1109/CIEEC58067.2023.10166866","url":null,"abstract":"While the operation of high-density heavy-load trains brings greater economic benefits, the increase in the number of trains running in the same power supply arm will lead to an increase in the burden and stability of the traction power supply system. Therefore, it is necessary to build a simulation model of the fully parallel AT traction power supply system and study the impact of high-density heavy haul train operation on the traction power supply system. Based on the PSCAD electromagnetic transient simulation software, this paper establishes the simulation model of traction power supply system, calculates the equivalent impedance model of heavy-load train through the relevant theory of electromagnetic field and the chain network model, and quantitatively analyzes the characteristics of the impact of heavy-load train on the traction network and traction substation under different operating conditions. The research shows that the simulation model of traction power supply system built in this paper is reasonable and correct. Based on the idea of chain network model, the equivalent impedance of trains at different positions can be obtained iteratively by updating the system node admittance matrix, and the iterative algorithm has fast convergence speed. When three heavy-load trains in the power supply section are running at the same time, the minimum voltage of the traction network can drop to 26.04kV, and the maximum current of the T contact line of the outgoing line of the traction substation can reach 764.5A. The research results of this paper can provide reference for exploring the feasibility of high-density heavy-load train operation and the adaptability of traction power supply system.","PeriodicalId":185921,"journal":{"name":"2023 IEEE 6th International Electrical and Energy Conference (CIEEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134291095","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}