2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)最新文献_第7页

A novel identification method of lightning strokes for hvdc transmission lines based on voltage deviation 一种基于电压偏差的直流输电线路雷击识别新方法

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2535

Y. Wang, W. Mo, D. Zheng

引用次数: 0

A modular converter topology for offshore wind power generation with minimum decoupling capacitor 具有最小解耦电容的海上风力发电模块化变换器拓扑

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2575

Y. Wu, L. Hao, S. Pan, J. Gong, X. Dang, Yanlin Zhou

{"title":"A modular converter topology for offshore wind power generation with minimum decoupling capacitor","authors":"Y. Wu, L. Hao, S. Pan, J. Gong, X. Dang, Yanlin Zhou","doi":"10.1049/icp.2021.2575","DOIUrl":"https://doi.org/10.1049/icp.2021.2575","url":null,"abstract":"Wind power generation is one of the most mature and scale of developing new energy generation technology. Using advanced transmission technology to realize future offshore wind power base transmission has become an important direction under the background of future power grid construction and new infrastructure construction. The DC transmission method is mature in technology, but the converter station occupies a large area, and the platform is expensive. This paper proposes a modular converter topology suitable for offshore wind power generation with a minimum decoupling capacitor. The four-port LLCDCX is used as the key component of ripple cancellation, which can eliminate double-frequency power ripple, significantly reduce the volume of the converter and increase the power density. The inverter unit adopts the cascaded H-bridge structure and can be combined to meet the requirements of different levels of occasions. The DC side power decoupling control strategy is proposed, and the simulation results show the accuracy of the control strategy. The proposed topology provides new ideas for the construction of offshore wind power DC grids.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"91 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":"133726182","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

AC / DC decoupling control strategy for DC short circuit fault ride through of full bridge MMC 全桥MMC直流短路故障穿越的交直流解耦控制策略

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2545

H. Zhao, L. Jing, Y. Wei, X. Wu, S. Wang, R. Tian

引用次数: 0

Analysis on abnormal service conditions of the switch quantity of the microcomputer protection device 微机保护装置开关量异常工况分析

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2543

X. Wu, H. Cong, H. Chengxi

引用次数: 0

Failure analysis of laminated GFRP composite tubes under hydrostatic stress 静水应力作用下层压玻璃钢复合材料管失效分析

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2577

X. Zhang, Z. Chen, Q. Gu, G. Ni, C. Liu

{"title":"Failure analysis of laminated GFRP composite tubes under hydrostatic stress","authors":"X. Zhang, Z. Chen, Q. Gu, G. Ni, C. Liu","doi":"10.1049/icp.2021.2577","DOIUrl":"https://doi.org/10.1049/icp.2021.2577","url":null,"abstract":"In this paper, a root clause failure analysis of laminated glass fiber reinforced plastic (GFRP) composite tubes after hydrostatic experiment was performed to find out the effect of microstructure defects on the residual strain of the tubes after unloading. The analysis consisted of three steps: Firstly, microscopic images of failed areas of the GFRP tubes were obtained to analyse the dominated microstructure defects leading to the failure as well as the possible failure mechanisms. Then, a computational finite element model considering the microstructure defects was established to predict the failure initiation pressure and location of the laminated GFRP tubes by incorporating the Tsai-Hill failure criteria. Finally, the recommended ply design and defect size range were calculated by the computational model to improve the hydrostatic mechanical properties of the laminated GFRP composite tubes. The results demonstrated that fiber waviness was a critical factor which would cause the early failure initiation of the laminated GFRP composite tubes even under very low hydrostatic stress. By utilizing the developed computational models, we can improve the mechanical properties of the composite tubes by optimizing the thickness of each ply and controlling the fiber waviness under specific range.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"70 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":"123008949","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

Optimization design of solid insulation multi-winding high frequency transformer 固体绝缘多绕组高频变压器的优化设计

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2587

J. Yang, Z. Liang, R. Li

引用次数: 1

Research on high voltage turn-off topology of IGCT gate unit IGCT栅极单元高压关断拓扑研究

2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021) Pub Date : 1900-01-01 DOI: 10.1049/icp.2021.2554

H. Zeng, F. Shen, Y. Chen, M. Liu, F. Chen, X. Pan, P. Zou

{"title":"Research on high voltage turn-off topology of IGCT gate unit","authors":"H. Zeng, F. Shen, Y. Chen, M. Liu, F. Chen, X. Pan, P. Zou","doi":"10.1049/icp.2021.2554","DOIUrl":"https://doi.org/10.1049/icp.2021.2554","url":null,"abstract":"As the important part of the high-power semiconductor IGCT, the gate unit which is named GU, controls the turn-on and turnoff actions of GCT. For the GU, the cathode current commutation relies on the energy stored in the turn-off capacitor stack to realize current transfer. At the same time, the forward voltage of the turn-off circuit can't be lower than the reverse voltage generated by the parasitic parameters. Therefore, the capacitance and voltage of the turn-off capacitors need to meet the maximum current of IGCT. The turn-off capacitor stack usually uses the aluminum electrolytic capacitor, which includes the disadvantages of large size, low life, and temperature limit. In order to reduce the volume and increase the life of the product, and also ensure the reliable of the turn-off process. This paper researches and explains the principle of the turn-off energy regenerative or dynamic adjustment topology, and analyzes the control strategy of the high-voltage turn-off topology, then the prototype test verifies that the topology obtains the same turn-off ability under the same current, but it can greatly reduces the capacity of the turnoff capacitors. And it can guarantee the dynamic and static characteristics of the turn-off process.","PeriodicalId":242596,"journal":{"name":"2021 Annual Meeting of CSEE Study Committee of HVDC and Power Electronics (HVDC 2021)","volume":"14 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":"122262592","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