{"title":"Research on the Improved Calculation Method of the Influence of VSC-HVDC on AC Short-Circuit Current","authors":"S. Luo, Qiang Zhou, Meng Li, Zuohong Li, Donghui Zhang, Zhengmin Zuo","doi":"10.1109/POWERCON53785.2021.9697406","DOIUrl":null,"url":null,"abstract":"With the increasing number and scale of VSCHVDC connected to the power grid, the impact of VSC-HVDC on the AC short-circuit current level needs to be accurately calculated. Existing studies generally use simplified processing methods, and it is difficult to evaluate the short-circuit current calculation error. This paper summarizes the process and mechanism of VSC-HVDC short-circuit current contribution, establishes a typical VSC-HVDC electromagnetic transient model to analyze the influence on AC short-circuit current, analyzes the error source of the existing VSC-HVDC influence AC short-circuit current calculation method, and puts forward an improved method considering both active and reactive current components - AB coefficient method, which could theoretically improve the calculation accuracy of AC short-circuit current affected by VSC-HVDC. Finally, in order to improve the application range of the AB coefficient method, the fitting AB coefficient method is further proposed to greatly improve the calculation accuracy of the AC short-circuit current affected by VSC-HVDC, and the correctness and applicability of the method are verified through case studies.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 International Conference on Power System Technology (POWERCON)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/POWERCON53785.2021.9697406","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
With the increasing number and scale of VSCHVDC connected to the power grid, the impact of VSC-HVDC on the AC short-circuit current level needs to be accurately calculated. Existing studies generally use simplified processing methods, and it is difficult to evaluate the short-circuit current calculation error. This paper summarizes the process and mechanism of VSC-HVDC short-circuit current contribution, establishes a typical VSC-HVDC electromagnetic transient model to analyze the influence on AC short-circuit current, analyzes the error source of the existing VSC-HVDC influence AC short-circuit current calculation method, and puts forward an improved method considering both active and reactive current components - AB coefficient method, which could theoretically improve the calculation accuracy of AC short-circuit current affected by VSC-HVDC. Finally, in order to improve the application range of the AB coefficient method, the fitting AB coefficient method is further proposed to greatly improve the calculation accuracy of the AC short-circuit current affected by VSC-HVDC, and the correctness and applicability of the method are verified through case studies.