报告首先分析了串联补偿器的作用，指出远离负荷中心的大型风电更迫切需要串联补偿器，然后介绍了串联补偿器的相关概念，随后简单介绍了次同步效应（Subsynchronous Interactions，SSI）的研究历史以及相应的保护和减缓措施。-The report first analyzes the role of series compensation, pointing out that the load center away from the more urgent need of large wind power series compensator, and then introduced the related concepts of series compensation, followed by a brief introduction of the sub-synchronous effects (Subsynchronous Interactions, SSI) of the the study of history and the corresponding protection and mitigation measures.