随着全球可再生能源的快速发展,分布式电网将彻底改变未来配电网的设计运行方式,大量电力电子器件的应用会引起电力系统中次同步振荡(SSO)现象,严重影响了电力系统的稳定性。介绍了SSO的表现形式,并对其现象、机理进行归纳总结,简单比较了SSO现象的分析方法及有效的抑制手段,并对今后的工作内容进行了展望。
With the rapid development of global renewable energy,distributed grids will completely change the design and operation mode of the future distribution network.Application of a large number of power electronic devices will cause sub-synchronaus oscillation(SSO)in the power system,seriously affecting stability of the power system.In this paper,performance of SSO is introduced,and the mechanism of SSO summarized.The analysis method of SSO and effective suppression methods are compared.Future work is prospected.