Online estimation of subsynchronous voltage components in power systems

被引：30
|
作者：
Bongiorno, Massimo [1 ]
Svensson, Jan [2 ]
Angquist, Lennart [2 ]
机构：
[1] Chalmers, Div Elect Power Engn, Dept Energy & Environm, S-41296 Gothenburg, Sweden
[2] ABB Power Technol, SE-72178 Vasteras, Sweden
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2008年 / 23卷 / 01期
关键词：
filters; frequency-component estimation; recursive least square (RLS); subsynchronous resonance (SSR); torsional oscillations;
D O I：
10.1109/TPWRD.2007.905557
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, the problem of online estimation of subsynchronous frequency components in the measured grid voltage is treated. Two estimation methods, one based on the use of lowpass filters and a recursive least square algorithm, are investigated and compared. In particular, due to its higher degree of freedom in the design, the lowpass filters-based estimation method is found to be the most appropriate and accordingly further analyzed. The method is improved to cope with inaccurate knowledge of the subsynchronous frequency. The simulation results prove the effectiveness of the investigated method both for the ideal and the disturbed case.
引用
收藏
页码：410 / 418
页数：9
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