Changhao He, Rui Qin, Baojun Xu, Yuyin Zhan, Haifeng Li
{"title":"Influence of Distributed Generation on Power Frequency Overvoltage Characteristics of Transformer Neutral Point","authors":"Changhao He, Rui Qin, Baojun Xu, Yuyin Zhan, Haifeng Li","doi":"10.1109/ICPES56491.2022.10073131","DOIUrl":null,"url":null,"abstract":"Distributed generation (DG) will bring various problems to the relay protection and automation of distribution network, which may also lead to serious consequences of the ungrounded transformer neutral point overvoltage. This paper analyzes the mechanism of power frequency overvoltage at the ungrounded transformer neutral point under single-phase grounding fault. Based on it, this paper studies the influence of DG on neutral point overvoltage after 110kV line fault in detail. Considering that there are rotational DGs and inverter-interfaced DGs (IIDGs) under different control modes, test results show that PQ-controlled DG makes the transformer neutral point voltage exceeds its rated value easiest, and it also has the greatest insulation threat to neutral point overvoltage.","PeriodicalId":425438,"journal":{"name":"2022 12th International Conference on Power and Energy Systems (ICPES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 12th International Conference on Power and Energy Systems (ICPES)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPES56491.2022.10073131","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
Distributed generation (DG) will bring various problems to the relay protection and automation of distribution network, which may also lead to serious consequences of the ungrounded transformer neutral point overvoltage. This paper analyzes the mechanism of power frequency overvoltage at the ungrounded transformer neutral point under single-phase grounding fault. Based on it, this paper studies the influence of DG on neutral point overvoltage after 110kV line fault in detail. Considering that there are rotational DGs and inverter-interfaced DGs (IIDGs) under different control modes, test results show that PQ-controlled DG makes the transformer neutral point voltage exceeds its rated value easiest, and it also has the greatest insulation threat to neutral point overvoltage.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
