2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)最新文献_第5页

Research on flexible shutoff and blocking strategies of VSC-HVDC converter valves under AC system faults 交流系统故障下vdc - hvdc换流阀的柔性关断和阻塞策略研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2566

L. Yang, Q. Liao, Y. Zhou, S. Xu

引用次数: 0

Lithium-ion batteries fault diagnosis based on multi-dimensional indicator 基于多维指标的锂离子电池故障诊断

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2544

W. Xiao, S. Miao, J. Jia, Q. Zhu, Y. Huang

{"title":"Lithium-ion batteries fault diagnosis based on multi-dimensional indicator","authors":"W. Xiao, S. Miao, J. Jia, Q. Zhu, Y. Huang","doi":"10.1049/icp.2021.2544","DOIUrl":"https://doi.org/10.1049/icp.2021.2544","url":null,"abstract":"Since lithium-ion batteries are the core components and main sources of failures in electric vehicles and energy storage systems, fault diagnosis plays a crucial role in the stable operation of lithium-ion batteries. In this paper, a multidimensional indicator-based lithium-ion battery fault diagnosis algorithm is proposed to obtain the weights of different dimensional indicators in the battery fault evaluation system, which applies entropy weight method to calculate the risk coefficients of each individual battery for battery fault diagnosis. The algorithm validation work in this paper is completed in the MIT-Stanford public experimental data set and the actual operation data set of the energy storage system. Firstly, the data feature extraction method suitable for engineering application scenarios is selected. Then, the entropy weight method is used to calculate the weights of each indicator, and then the cause of the battery failure is analysed based on the weight information of each indicator. The method with the entropy of each dimensional indicator to calculate its weight can locate the faulty battery and reduce the subjectivity in the fault analysis process. Meanwhile, the method is suitable for real-time fault diagnosis of lithiumion battery systems without complicated training models and hyper-parameter adjustment processes.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127036214","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

Loss analysis of three-level wind power converter based on IGCT 基于IGCT的三级风电变流器损耗分析

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2597

M. Guo, L. Qu, B. Tang, Y. Chen, Fusheng Hao, B. Cui, X. Zhou, Z. Yu, N. Jia, B. Zhao, W. Wang

引用次数: 0

The optimization analysis of the hybrid DC circuit breaker based on electromagnetic coupled coils 基于电磁耦合线圈的混合式直流断路器的优化分析

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2583

J. Zhong, X. Zhao, H. Zhang, Y. Ban, W. Liu, X. Wu

{"title":"The optimization analysis of the hybrid DC circuit breaker based on electromagnetic coupled coils","authors":"J. Zhong, X. Zhao, H. Zhang, Y. Ban, W. Liu, X. Wu","doi":"10.1049/icp.2021.2583","DOIUrl":"https://doi.org/10.1049/icp.2021.2583","url":null,"abstract":"Aiming at the problems of long current transfer time and low efficiency caused by too low arc voltage in the opening process of the hybrid DC breaker, we propose to increase the DC arc voltage and shorten the current transfer time by adding the highfrequency transformation magnetic field outside the vacuum interrupter. In the end, the working principle and switching process of the hybrid DC circuit breaker are briefly described. Based on the finite element analysis method, we establish a transient mathematical model of field-circuit coupling of vacuum interrupter with external high-frequency transformation magnetic field, and build a drive circuit with external magnetic field in the MATLAB/simulink. The magnetic fields produced by different forms of coils and the key parameters affecting the magnetic field are analyzed by joint simulations of MATLAB and Ansoft Maxwell, Including coil turn spacing, coil cross-sectional area, and coil excitation; According to the simulation results, we found the two-coil symmetric model has high magnetic field uniformity, large magnetic field strength and small space occupation. When the turn spacing is 2mm, the cross-sectional area is 1mm×15mm, the magnetic field strength at 70mm matches the design; Finally, we set up a principle test platform, calibrate the parameters of the coil and the drive circuit, obtain the open arc voltage of the DC circuit breaker by experiments, which is compared with the results without magnetic field. The result shows that the coil designed in accordance with the simulation results can significantly increase the arc voltage, shorten the current transfer time, and contribute to the opening of the DC circuit breaker.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122821649","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

Dc voltage characteristics of controllable current source converter based on TPWM 基于TPWM的可控电流源变换器直流电压特性研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2529

W. Zhang, L. Chen, B. Zhang, X. Wei, L. Qi, C. Gao, Z. He

引用次数: 0

Differential lightning protection research on ± 800kv UHVDC transmission lines ±800kv特高压直流输电线路差动防雷研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2562

L. Zhang, Y. Li, W. Shi, Y. Yin, M. Dai, P. Kang, T. Lei

{"title":"Differential lightning protection research on ± 800kv UHVDC transmission lines","authors":"L. Zhang, Y. Li, W. Shi, Y. Yin, M. Dai, P. Kang, T. Lei","doi":"10.1049/icp.2021.2562","DOIUrl":"https://doi.org/10.1049/icp.2021.2562","url":null,"abstract":"This paper carried out the further research on differential lightning protection of UHVDC transmission lines, which was based on the ±800kV UHVDC project from Qinghai to Henan. According to the design parameters at the construction stage, the lightning protection performance of the project was studied, and the backflashover rate and the shielding failure flashover rate were given in this paper. By comparing the calculation results of this project and the projects already built, the rationality of the simulation calculation results was verified. In this paper, the mountainous terrain is classified, and the principle of electrical geometric model (EGM model) is used to research the shielding failure flashover rate deeply under different mountainous terrain. Because the whole transmission line of the project was located in the thunderstorm area, the vulnerable section was proposed based on the ground inclination angle, and the lightning protection differentiation measures were proposed for the vulnerable section. After the lightning optimization measures were adopted, the lightning flashover rate of transmission line from Qinghai to Henan was almostly reduced to 0.1 times/100km in 40 thunderstorm day area, which meet the requirements of the standard named as “guide for lightning protection of overhead transmission lines”. The results obtained in this paper can be used as the reference for engineering design.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127990114","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

Insulation improvement scheme of multi-output solid-state-transformer for photovoltaic grid-connected circuit 光伏并网电路多输出固态变压器绝缘改进方案

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2588

H. Wang, W. Guo, B. Xie, R. Li

引用次数: 0

Assessment of commutation failure under asymmetric fault in the HVDC inverter side 非对称故障下高压直流逆变侧换相失效评估

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2537

J. Zhao, X. Li, J. Zhang, Z. Chen

{"title":"Assessment of commutation failure under asymmetric fault in the HVDC inverter side","authors":"J. Zhao, X. Li, J. Zhang, Z. Chen","doi":"10.1049/icp.2021.2537","DOIUrl":"https://doi.org/10.1049/icp.2021.2537","url":null,"abstract":"The short-circuit fault of the AC system on the inverter side is the main cause of the commutation failure of the HVDC transmission system. Among them, the asymmetric short-circuit fault not only causes the amplitude of the commutation voltage to drop, but also causes the phase shift of the commutation voltage. Valves face different risks of commutation failure. In order to evaluate the risk of commutation failure during asymmetric faults, this paper proposes the concept of maximum commutation current from the perspective of the DC control system. Based on the method of power system analysis, the calculation formula of the maximum commutation current of the 12-pulse converter valve is derived, and the risk of commutation failure of each valve is evaluated by comparing the maximum commutation current and the VDCOL current command. Based on PSCAD/EMTDC electromagnetic transient simulation, the correctness of the maximum commutation current mentioned in the article on the risk assessment of commutation failure of different valves is verified. The maximum commutation current can provide guidance for the DC control system's measures to suppress commutation failure.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115186220","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

Carbon emission and its reduction: from the perspective of film capacitors in the energy system 碳排放与减排:以能源系统中的薄膜电容器为视角

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2596

Y.-X. Zhang, Q. Feng, F.-Y. Chen, Shao-Long Zhong, Junhua Pei, Jiang-Bo Ping, Li-Juan Yin, Weibing Cao, D.-F. Liu, Z. Dang

{"title":"Carbon emission and its reduction: from the perspective of film capacitors in the energy system","authors":"Y.-X. Zhang, Q. Feng, F.-Y. Chen, Shao-Long Zhong, Junhua Pei, Jiang-Bo Ping, Li-Juan Yin, Weibing Cao, D.-F. Liu, Z. Dang","doi":"10.1049/icp.2021.2596","DOIUrl":"https://doi.org/10.1049/icp.2021.2596","url":null,"abstract":"Climate change, resource scarcity, and environmental pollution warn the world to accelerate its pace toward carbon neutrality. As an important source of carbon emissions, energy has received widespread attention. In order to further understand the impact of energy system on carbon emissions, it is necessary to study carbon emissions and its reduction from the perspective of energy system's key components. First, we marked the position where film capacitor makes an impact on energy system. Second, we calculated the demand for film capacitors to further understand its importance. Third, we described the carbon emissions caused by the film capacitor's production by calculating the carbon emissions generated during the production of film capacitor's constituent materials. Fourth, a case study of using film capacitors to replace aluminium electrolytic capacitors to allow more renewable energy entering energy system was conducted. The result shows that if a film capacitor replaces an aluminium electrolytic capacitor with the same capacitance (1uF) for wind power transmission and the missing part of the energy is supplemented by coal-fired power generation, CO2 emissions will be reduced by 1,628.77 kg per year. Finally, from the perspective of film capacitor's life cycle, suggestions for promoting carbon neutralization by film capacitors were given.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125997409","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: 7

Clustering algorithm based open-circuit failures diagnosis for modular multilevel converters 基于聚类算法的模块化多电平变换器开路故障诊断

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2558

Z. Liu, L. Lin, T. Yin, Y. Huang

引用次数: 0