Siqi Liu , Pengfei Hu , Yanxue Yu , Zheng Chen , Daozhuo Jiang , Wenbin Lin
{"title":"并网虚拟同步发电机的新型故障穿越策略:功率角稳定性增强和电流限制","authors":"Siqi Liu , Pengfei Hu , Yanxue Yu , Zheng Chen , Daozhuo Jiang , Wenbin Lin","doi":"10.1016/j.ijepes.2024.110293","DOIUrl":null,"url":null,"abstract":"<div><div>As more and more renewable energy generations (REGs) are connected to the power grid through grid-following converters, the lack of inertia has become a challenge to grid-frequency stability. Virtual Synchronous Generator (VSG) is a prospected solution for this issue. However, VSGs still have several unresolved issues in practical application. Especially, in a three-phase symmetrical fault scenario, the inrush current may damage the converter and the VSG would lose synchronization with the grid. To address these issues, this paper presents a novel fault ride through (FRT) strategy. First, the transient behaviours of VSGs, including transient current characteristics and power angle characteristics are analysed, which reveals that the increase of the power angle would aggravate the inrush current. Thus, an angular frequency dynamic compensation (AFDC) strategy is proposed to eliminate the instability of power angle. Then, this paper presents a current-limiting strategy combining virtual impedance (VI) and reference voltage adjustment to limit the fault current to a safe level. Finally, the time-domain simulations and experimental tests are performed to verify the effectiveness of the proposed FRT strategy.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"162 ","pages":"Article 110293"},"PeriodicalIF":5.0000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A novel fault ride through strategy for grid-connected virtual synchronous Generators: Power angle stability enhancement and current limiting\",\"authors\":\"Siqi Liu , Pengfei Hu , Yanxue Yu , Zheng Chen , Daozhuo Jiang , Wenbin Lin\",\"doi\":\"10.1016/j.ijepes.2024.110293\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>As more and more renewable energy generations (REGs) are connected to the power grid through grid-following converters, the lack of inertia has become a challenge to grid-frequency stability. Virtual Synchronous Generator (VSG) is a prospected solution for this issue. However, VSGs still have several unresolved issues in practical application. Especially, in a three-phase symmetrical fault scenario, the inrush current may damage the converter and the VSG would lose synchronization with the grid. To address these issues, this paper presents a novel fault ride through (FRT) strategy. First, the transient behaviours of VSGs, including transient current characteristics and power angle characteristics are analysed, which reveals that the increase of the power angle would aggravate the inrush current. Thus, an angular frequency dynamic compensation (AFDC) strategy is proposed to eliminate the instability of power angle. Then, this paper presents a current-limiting strategy combining virtual impedance (VI) and reference voltage adjustment to limit the fault current to a safe level. Finally, the time-domain simulations and experimental tests are performed to verify the effectiveness of the proposed FRT strategy.</div></div>\",\"PeriodicalId\":50326,\"journal\":{\"name\":\"International Journal of Electrical Power & Energy Systems\",\"volume\":\"162 \",\"pages\":\"Article 110293\"},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2024-10-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Electrical Power & Energy Systems\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0142061524005155\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Electrical Power & Energy Systems","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0142061524005155","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
A novel fault ride through strategy for grid-connected virtual synchronous Generators: Power angle stability enhancement and current limiting
As more and more renewable energy generations (REGs) are connected to the power grid through grid-following converters, the lack of inertia has become a challenge to grid-frequency stability. Virtual Synchronous Generator (VSG) is a prospected solution for this issue. However, VSGs still have several unresolved issues in practical application. Especially, in a three-phase symmetrical fault scenario, the inrush current may damage the converter and the VSG would lose synchronization with the grid. To address these issues, this paper presents a novel fault ride through (FRT) strategy. First, the transient behaviours of VSGs, including transient current characteristics and power angle characteristics are analysed, which reveals that the increase of the power angle would aggravate the inrush current. Thus, an angular frequency dynamic compensation (AFDC) strategy is proposed to eliminate the instability of power angle. Then, this paper presents a current-limiting strategy combining virtual impedance (VI) and reference voltage adjustment to limit the fault current to a safe level. Finally, the time-domain simulations and experimental tests are performed to verify the effectiveness of the proposed FRT strategy.
期刊介绍:
The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces.
As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.