After several instances of sub-synchronous oscillation(SSO)events occurred at wind farms(WFs)with Type-4 wind turbine generators(Type-4 WTGs),the phenomenon has attracted wide attention.The emerging SSO events observe...After several instances of sub-synchronous oscillation(SSO)events occurred at wind farms(WFs)with Type-4 wind turbine generators(Type-4 WTGs),the phenomenon has attracted wide attention.The emerging SSO events observed in Type-4 WTG-based WFs are more complex than those previously observed in thermal power plants or Type-3 WTG-based WFs.The SSO(for example,occurred in Hami Type-4 WTG-based WF,China),could be triggered without the involvement of series compensation in the transmission system.Firstly,this paper discusses and summarizes the previous definitions and classifications,and an improved SSO classification is proposed by supplementing the conventional IEEE classification in the view of Type-4 WTG-related SSO.Secondly,an overview of identification methods for SSO sources and the applicable scope of these methods is evaluated.Then,mitigation and protection measures available for addressing the Type-4 WTG-related SSO are comprehensively reviewed.In addition,lessons learned from real-world SSO events,stakeholders’perspectives,as well as challenges and potential further study of the Type-4 WTGrelated SSO are discussed.This review aims to enhance the understanding of the SSO associated with Type-4 WTGs and contribute to the development of effective solutions to mitigate the phenomenon in power systems.展开更多
文摘After several instances of sub-synchronous oscillation(SSO)events occurred at wind farms(WFs)with Type-4 wind turbine generators(Type-4 WTGs),the phenomenon has attracted wide attention.The emerging SSO events observed in Type-4 WTG-based WFs are more complex than those previously observed in thermal power plants or Type-3 WTG-based WFs.The SSO(for example,occurred in Hami Type-4 WTG-based WF,China),could be triggered without the involvement of series compensation in the transmission system.Firstly,this paper discusses and summarizes the previous definitions and classifications,and an improved SSO classification is proposed by supplementing the conventional IEEE classification in the view of Type-4 WTG-related SSO.Secondly,an overview of identification methods for SSO sources and the applicable scope of these methods is evaluated.Then,mitigation and protection measures available for addressing the Type-4 WTG-related SSO are comprehensively reviewed.In addition,lessons learned from real-world SSO events,stakeholders’perspectives,as well as challenges and potential further study of the Type-4 WTGrelated SSO are discussed.This review aims to enhance the understanding of the SSO associated with Type-4 WTGs and contribute to the development of effective solutions to mitigate the phenomenon in power systems.
