{"title":"A generalized method of power oscillation characteristic analysis for multi-VSC grid-connected system","authors":"Yonghai Xu, Benshuang Qin, Jiaoxin Jia, Aobo Shan, Yidan Chen, Wang Yingxin","doi":"10.1049/gtd2.13306","DOIUrl":null,"url":null,"abstract":"<p>The grid-connection of high-permeability new energy through voltage-source converters (VSCs) brings new oscillation risks to the power system, which seriously threatens the stable operation of the system. Therefore, an evaluating method based on modal analysis is proposed to investigate the power oscillation characteristics in a multi-VSC grid-connected system. Initially, based on the analogy method, the output admittance model of voltage-source controlled VSCs (VC-VSCs) and current-source controlled VSCs (CC-VSCs) is established. Subsequently, the output admittance model of a multi-VSC grid-connected system is constructed. Then, the modal analysis method is introduced to investigate the power oscillation characteristics of VC-VSCs and CC-VSCs, and the influence factors of power oscillation and its variation law are analysed. Next, a sensitivity analysis is also employed, which helps to identify the origin of each oscillation mode and determine the contribution of each component to the power oscillation. Finally, simulation and experiment are carried out to verify the effectiveness of the above analysis method.</p>","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"18 22","pages":"3633-3645"},"PeriodicalIF":2.0000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13306","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iet Generation Transmission & Distribution","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/gtd2.13306","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The grid-connection of high-permeability new energy through voltage-source converters (VSCs) brings new oscillation risks to the power system, which seriously threatens the stable operation of the system. Therefore, an evaluating method based on modal analysis is proposed to investigate the power oscillation characteristics in a multi-VSC grid-connected system. Initially, based on the analogy method, the output admittance model of voltage-source controlled VSCs (VC-VSCs) and current-source controlled VSCs (CC-VSCs) is established. Subsequently, the output admittance model of a multi-VSC grid-connected system is constructed. Then, the modal analysis method is introduced to investigate the power oscillation characteristics of VC-VSCs and CC-VSCs, and the influence factors of power oscillation and its variation law are analysed. Next, a sensitivity analysis is also employed, which helps to identify the origin of each oscillation mode and determine the contribution of each component to the power oscillation. Finally, simulation and experiment are carried out to verify the effectiveness of the above analysis method.
期刊介绍：
IET Generation, Transmission & Distribution is intended as a forum for the publication and discussion of current practice and future developments in electric power generation, transmission and distribution. Practical papers in which examples of good present practice can be described and disseminated are particularly sought. Papers of high technical merit relying on mathematical arguments and computation will be considered, but authors are asked to relegate, as far as possible, the details of analysis to an appendix.
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