基于TLS-ESPRIT算法的附加励磁阻尼控制抑制次同步振荡  

SSO mitigation using supplementary excitation damping controller based on TLS-ESPRIT

作　　者：蒋平[1] 吴熙[1] 罗曦[1] 

机构地区：[1]东南大学电气工程学院,江苏南京210096

出　　处：《电力自动化设备》2009年第10期25-29,共5页Electric Power Automation Equipment

基　　金：'十一五'国家科技支撑计划重大项目(2008BAA13B07)~~

摘　　要：基于TLS-ESPRIT算法进行次同步振荡研究,将发电机机械阻尼系数取为0,以时域仿真的角速度偏差信号构成的数据矩阵为基础,用TLS-ESPRIT算法高精度地辨识出次同步振荡中各模态的频率及其对应的衰减系数,并与现场测得的模态阻尼相比较,判断次同步振荡的稳定性。该方法在难以获得弹簧-质量块模型阻尼系数的情况下依然可以判断次同步振荡稳定性,并且适用于多机系统分析。进一步提出了基于TLS-ESPRIT算法的附加励磁阻尼控制(SEDC)设计策略,以IEEE第二标准模型SYS-2为研究对象,设计了SEDC的具体参数。仿真结果表明,所设计的SEDC能有效抑制次同步振荡。SSO（Sub- Synchronous Oscillation） is studied by TLS-ESPRIT（Total Least Squares-Estimation of Signal Parameters via Rotational Invariance Technique） algorithm. By setting the generator mechanical damping coefficient to zero,and based on the data matrix formed with the angular velocity difference in time -domain,the TLS-ESPRIT algorithm is used to identify every oscillation mode frequency and its corresponding attenuation coefficient in high resolution, which is compared with the site modal damping to judge the stability of SSO. It judges properly the stability of SSO without the damping coefficients of spring-mass model and is suitable for multi-machine power system analysis. A scheme of SEDC（Supplementary Excitation Damping Controller） is further designed based on TLS-ESPRIT. As an example,detail parameters of SEDC are designed for the IEEE second benchmark system. Simulative results show that the designed SEDC miti- gates the SSO effectively.

关 键 词：电力系统 次同步振荡 TLS-ESPRIT算法 附加励磁阻尼控制 可控串联补偿 

分 类 号：TM712[电气工程—电力系统及自动化]