次同步振荡功率的传播特性及计算方法  

Propagation Characteristics and Calculation Algorithm of Subsynchronous Oscillation Power

作　　者：刘子瑜 王西田[1] 解大[1] LIU Ziyu;WANG Xitian;XIE Da(Key Laboratory of Control of Power Transmission and Conversion(SJTU),Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240

出　　处：《南方电网技术》2022年第7期108-115,共8页Southern Power System Technology

基　　金：国家自然科学基金资助项目(51677114)。

摘　　要：以可再生能源为主体的新型电力系统的运行稳定性呈现新形态和特点,次同步振荡是其中的一种代表性问题。次同步振荡传播路径的影响因素复杂,为了实现次同步振荡传播情况的量化分析,研究了次同步振荡功率及其传播特性,并提出了一种次同步振荡功率主导分量的算法。算法从完善的次同步振荡功率定义出发,以其中的交流分量的幅值大小来表征次同步振荡的传播情况,对工频有功、无功功率等因素对传播特性的影响进行分析,并通过数学推导,将表达式中工频分量和次同步振荡分量解耦计算。最后通过2机5节点的算例,验证了所述方法的有效性。The operation stability of renewable power system presents new forms and characteristics, and subsynchronous oscillation is one of the representative problems. The influence factors of subsynchronous oscillation propagation path are complex. This paper studies the subsynchronous oscillation power and its propagation characteristics, and proposes an algorithm for the dominant component of subsynchronous oscillation power. The algorithm starts from the complete definition of subsynchronous oscillation power, characterizing the propagation of subsynchronous oscillation by the amplitude of AC component and analyzing the propagation characteristics afterwards. The proposed algorithm decouples the power frequency component and subsynchronous oscillation component in the expression through mathematical derivation. Finally, the effectiveness of the algorithm is verified by a two-machine five-node case.

关 键 词：次同步振荡功率 交流分量幅值 传播特性 潮流 

分 类 号：TM76[电气工程—电力系统及自动化]