2021 IEEE 4th International Electrical and Energy Conference (CIEEC)最新文献_第5页

Research on Aging Characteristics of Operating Composite Insulator in Inner Mongolia Power Grid 内蒙古电网运行复合绝缘子老化特性研究

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510387

Jiankun Zhao, Jialin Qin, Jianli Zhao, Baofeng Yan

引用次数: 0

Study on Single Bus Separation Mode and In-out Line Arrangement Based on Short Circuit Current Optimization 基于短路电流优化的单母线分离方式及进出线布置研究

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9511034

Hui Ma, Yong Wang, Shengya Qiao, Kaipei Liu, Tianyuan Tan, Rong Fu

{"title":"Study on Single Bus Separation Mode and In-out Line Arrangement Based on Short Circuit Current Optimization","authors":"Hui Ma, Yong Wang, Shengya Qiao, Kaipei Liu, Tianyuan Tan, Rong Fu","doi":"10.1109/CIEEC50170.2021.9511034","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9511034","url":null,"abstract":"In order to limit the short circuit current (SCC) in the power system, bus separate operation is the most simple, effective and economical way. When limiting the SCC by using the method of bus separation, the specific switch of the bus is usually broken after the topology of the in-out lines of bus are fixed, but the influence of the arrangement of the bus in-out lines and the mode of bus separation on the effect of SCC limitation is not considered. Based on the virtual branch method, this paper studies the influence of the bus in-out line arrangement and mode of bus separation on the node SCC, and takes the SCC as the optimization target, so as to get the optimal scheme. From the node impedance matrix, this method illustrates the influence of bus separation mode and in-out line arrangement on the SCC. Finally, the effectiveness of this method is analyzed and verified in IEEE39 node standard network. The example shows that the result of the model is consistent with the conventional enumeration method, but the enumeration times are reduced by more than half.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123908707","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

Stator Phase Resistance Trade-off Between Output Torque and Braking Torque of PMSM 永磁同步电机输出转矩与制动转矩的定子相阻权衡

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510842

Fan Zhang, Bing Song, Shushu Zhu, Yaohua Hu, Chuang Liu

引用次数: 0

A Novel SiC Device Modeling With Power Stage and Gate Driver Decoupling 一种新型功率级与栅极驱动器解耦的SiC器件建模方法

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9511044

Qing Xin, Han Peng, Zhipeng Cheng, Jimin Chen

{"title":"A Novel SiC Device Modeling With Power Stage and Gate Driver Decoupling","authors":"Qing Xin, Han Peng, Zhipeng Cheng, Jimin Chen","doi":"10.1109/CIEEC50170.2021.9511044","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9511044","url":null,"abstract":"Miller capacitor (Cgd) and common source inductor (Lscom) are two major feedback parameters across gate driver loop and power loop for power devices. Silicon Carbide (SiC) power transistors have fast switching speed but are more inclined to be affected by parasitics, such as overshoots, oscillations and cross-talk. To ensure a reliable and efficient SiC switching, the impacts of miller capacitor and common source inductor need to be identified and quantified. Since these two parameters are coupled between two loops, a comprehensive analytical analysis is quite complicated and requires massive computation. Therefore, a novel SiC device modeling based upon Cgd and Lscom decoupling is proposed. By extracted the equivalent model for Cgd and Lscom at different switching intervals, gate driver loop and main power loop can be fully decoupled. By doing so, the designs and optimizations for the two loops will be more straightforward and precise. With the proposed decoupling modeling approach, the decoupled equivalent circuit is verified to have descent accuracy in predicting the actual SiC switching transients.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"250 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170941","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: 2

Method of Power-Frequency Interval-Wave for Measurement of Large Grounding Systems 大型接地系统工频间隔波测量方法

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510773

Haocheng Wang, Xuan Zhang, Yang Tian, Zhiqiang He, Xiaohui Hu, Zhuohong Pan

引用次数: 0

An ANN-INC MPPT Strategy for Photovoltaic System 光伏系统的ANN-INC MPPT策略

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510425

Jiasheng Hu, M. Dong, M. Shehu

引用次数: 1

A Power Transformer Condition Assessment Method Based on Fuzzy Nearness Degree and Improved Cloud Matter-element Model 基于模糊贴近度和改进云物元模型的电力变压器状态评价方法

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510875

Hongbo Yu, Yunwen Yu, Min Wang, W. Xiong, Xufeng Yuan, Xiaosong Zou

{"title":"A Power Transformer Condition Assessment Method Based on Fuzzy Nearness Degree and Improved Cloud Matter-element Model","authors":"Hongbo Yu, Yunwen Yu, Min Wang, W. Xiong, Xufeng Yuan, Xiaosong Zou","doi":"10.1109/CIEEC50170.2021.9510875","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510875","url":null,"abstract":"In order to solve the problems of subjectivity, limitation of decision method and only considering the defect of single fuzziness in transformer condition assessment, a condition assessment method of power transformer based on fuzzy nearness degree and improved cloud matter-element model is proposed. Considering the randomness and fuzziness of transformer at the condition level boundary, the cloud matterelement model is used to construct the basic framework of condition assessment. Then, in order to take into account the clarity and fuzziness of the \"3En\" rule and the \"50% association degree\" rule, and to avoid conflicts of condition conclusions, cloud matter-element model is improved by cloud entropy optimization algorithm to calculate the membership degree of corresponding level of evaluation index. In addition, based on the multi-objective classification algorithm of fuzzy nearness degree, the evaluation index and asymmetric nearness degree vector of each condition level are calculated, the positive and negative ideal levels are determined by Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), and the condition of the transformer is determined according to each asymmetric nearness degree vector and symmetric nearness degree of the positive and negative ideal levels. Taking two 220kV oil-immersed power transformers as examples, the validity and accuracy of the method are proved.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121673672","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

Research on Characteristics Analysis and Suppression Method of Short Circuit Fault of Coaxial Cable in Electromagnetic Launch 电磁发射同轴电缆短路故障特性分析及抑制方法研究

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510271

Junwei Cui, X. Zhang, Junyong Lu, Yufeng Dai

{"title":"Research on Characteristics Analysis and Suppression Method of Short Circuit Fault of Coaxial Cable in Electromagnetic Launch","authors":"Junwei Cui, X. Zhang, Junyong Lu, Yufeng Dai","doi":"10.1109/CIEEC50170.2021.9510271","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510271","url":null,"abstract":"In electromagnetic launch systems, coaxial cables are used for energy transmission from the power supply to the launcher. Once the cable has a short-circuit fault, it will cause the cable to over-current or even explode, causing the launch to fail. This paper first established the dynamic launch model of the capacitive energy storage electromagnetic launch system, and analyzed in detail the influence of the coaxial cable short-circuit fault location on the load current, projectile exit speed, and coaxial cable current. The results show that the closer the short-circuit fault location is to the load side, The larger the cable fault current, the smaller the projectile exit velocity.At 1m the cable fault current reached 1.9 times the normal current, resulting in a 76% drop in exit speed.Secondly,an electromagnetic launch system model with a high-temperature superconducting current limiter was established,and the installation position of the current limiter was optimized. The fault current before and after the installation of the current limiter was simulated and compared. The results showed that: after the current limiter was added, the cable short-circuit current The peak value dropped by 29%, and the projectile exit speed was reduced by 61 % compared to normal conditions, which can effectively reduce the impact of short-circuit current on the cable, increase the projectile exit speed, and provide guidance for the safety design of the electromagnetic launch system.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"33 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114014006","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

Theoretical Calculation, Simulation and Experimental Analysis of Cavitation Threshold of Transformer Oil 变压器油空化阈值的理论计算、仿真与实验分析

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510386

Xiaohui He, Qiaogen Zhang, C. Guo, Rui Zhang, Xingwang Wu

引用次数: 0

Evaluation Method of Wind Power Consumption Limitation in Power System with High Proportion of Wind Power 高比例风电系统风电消纳限制评价方法

2021 IEEE 4th International Electrical and Energy Conference (CIEEC) Pub Date : 2021-05-28 DOI: 10.1109/CIEEC50170.2021.9510533

Hongye Wang, Li He, Xue Lin, Jing Ma, Baihui An, Weixia Yang, Fei Xu, Tao Hou, Jing Li, Changsheng Feng, Junhui Li

引用次数: 1