{"title":"Mechanism Analysis and Enhancement Methods for Instability of LCC-HVDC System Caused by Series Compensation and STATCOMs","authors":"Haitao Xia, Lerong Hong, Xiaoping Zhou, Hanhang Yin, Yifeng Liu, Renlong Zhu, Lingfeng Deng","doi":"10.1109/ICoPESA54515.2022.9754485","DOIUrl":null,"url":null,"abstract":"The mechanisms of LCC-HVDC system instability stimulated by series compensation (SC) and multiple STATCOMs are analyzed in this paper. The movement of dominant poles (MDPs) reveal that the SC will add a pair of mid-frequency poles to the system and deteriorate the system stability. For STATCOMs, increasing their online numbers will move the system poles at mid-frequency to left half plan (LHP) but move that at high frequency to the right half plan (RHP). Then, two approaches that can respectively improve the mid-frequency and high-frequency characteristic of the LCC-HVDC system are discussed, the effectiveness of which is verified by the simulation results of PSCAD/EMTDC.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICoPESA54515.2022.9754485","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
The mechanisms of LCC-HVDC system instability stimulated by series compensation (SC) and multiple STATCOMs are analyzed in this paper. The movement of dominant poles (MDPs) reveal that the SC will add a pair of mid-frequency poles to the system and deteriorate the system stability. For STATCOMs, increasing their online numbers will move the system poles at mid-frequency to left half plan (LHP) but move that at high frequency to the right half plan (RHP). Then, two approaches that can respectively improve the mid-frequency and high-frequency characteristic of the LCC-HVDC system are discussed, the effectiveness of which is verified by the simulation results of PSCAD/EMTDC.
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