基于RDT和STD的电力系统次同步振荡参数辨识  

Parameter Identification of Subsynchronous Oscillation in Power System Based on RDT and STD

作　　者：王雨虹[1,2] 许可 刘晓东 WANG Yuhong;XU Ke;Liu Xiaodong(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China;School of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,China;State Grid Huludao Power Supply Company,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105 [2]辽宁工程技术大学安全科学与工程学院,阜新123000 [3]国网葫芦岛供电公司,葫芦岛125105

出　　处：《电力系统及其自动化学报》2021年第1期100-106,共7页Proceedings of the CSU-EPSA

摘　　要：为提高目前电力系统次同步振荡参数辨识精度,提出一种基于随机减量技术RDT(random decrement technique)和稀疏时域STD(sparse time domain)算法相结合的辨识方法。利用RDT对输入信号进行处理,提取自由衰减时域信号。然后通过STD算法计算得到振荡模态参数。仿真算例和实测算例的结果表明,该方法可以有效地辨识出次同步振荡的模态参数,可以用于辨识电力系统次同步振荡,为抑制次同步振荡的设计奠定了基础。To improve the parameter identification accuracy of subsynchronous oscillation in a power system at present,an identification method based on the combination of random decrement technique(RDT)and sparse time domain(STD)algorithm is proposed.First,RDT is used to process the input signal and extract the free attenuation time-domain signal.Then,the oscillation modal parameters are calculated using the STD algorithm.The results of simulation and real examples show that the proposed method can effectively identify the modal parameters of subsynchronous oscillation,which can be used to identify the subsynchronous oscillation in the power system.The research in this paper lays a foundation for the design that can suppress the subsynchronous oscillation.

关 键 词：次同步振荡 辨识 随机减量技术 稀疏时域 模态参数 

分 类 号：TM712[电气工程—电力系统及自动化]