摘要
该文提出一种次同步模态能量(sub-synchronous modal energy,SSME)方法,用于双馈感应发电机(doubly-fed induction generators,DFIG)并网电力系统的次同步振荡(sub-synchronous oscillation,SSO)分析和溯源。首先,通过广义哈密顿理论构建并分析了DFIG并网电力系统的SSME结构,证明了DFIG子系统或外送线路子系统的SSME方向是判断SSO源是否在该子系统内的充分必要条件。在此基础上,提出一种基于子系统SSME的SSO溯源方法,通过监测子系统SSME的方向,可以判断SSO源是否在子系统内。最后,构造了负阻尼与强迫类型的SSO场景以证明所提出的基于SSME的溯源方法的性能,并与现有暂态能量流(transient energy flow,TEF)方法进行了比较。时域仿真结果验证提出的SSO溯源方法的有效性,并表明其比传统的TEF方法具有更好的可靠性。此外,基于该文的SSME方法有望实现风机振荡参与度评估。
In this paper,a sub-synchronous modal energy(SSME)approach is proposed for the sub-synchronous oscillation(SSO)analysis and source identification of power systems with doubly-fed induction generators(DFIGs).First,the SSME structure of a power system with DFIGs is constructed and analyzed via generalized Hamiltonian theory.The SSME direction of a DFIG subsystem or a transmission line subsystem is proved to be a sufficient and necessary criterion for identifying SSO sources.On this basis,an SSO source location method based on the SSME of the subsystem is proposed.By monitoring the SSME direction of the subsystem,whether the SSO source is within the subsystem can be determined.Finally,the performance of the proposed SSME-based location method is demonstrated and compared with the existing transient energy flow(TEF)method under both negative-damping and forced SSO scenarios.Time domain simulation results validate the effectiveness of the proposed SSO source location method and demonstrate its better reliability than the conventional TEF-based method.In addition,it is expected that the evaluation of participation degree of DFIGs in SSO can be realized based on the proposed SSME method.
作者
陈曦
吴熙
顾文
范立新
CHEN Xi;WU Xi;GU Wen;FAN Lixin(School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China;Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211102,Jiangsu Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2023年第15期5863-5876,共14页
Proceedings of the CSEE
基金
国家自然科学基金项目(52177075)
江苏省自然科学基金项目(BK20221466)。
关键词
次同步振荡
双馈风机
次同步模态能量
次同步振荡溯源
广义哈密顿理论
sub-synchronous oscillation(SSO)
doublyfed induction generators(DFIG)
sub-synchronous modal energy
location of SSO sources
generalized Hamiltonian theory
