A novel Kalman filter for frequency estimation of distorted signals in power systems

被引:266
作者
Routray, A [1 ]
Pradhan, AK [1 ]
Rao, KP [1 ]
机构
[1] Indian Inst Technol, Dept Elect Engn, Kharagpur 721302, W Bengal, India
关键词
filter stability; frequency estimation; Kalman filter; power system measurement;
D O I
10.1109/TIM.2002.1017717
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
A simple and novel approach in the design of an extended Kalmian filter (EKF) for the measurement of power system frequency has been presented in this paper. The design principles and the validity of the model have been outlined. The performance of this filter has been compared with some of the existing methods for estimating the frequency of a signal under noisy conditions. The feasibility of the proposed filter has been tested in the laboratory under worst-case measurement and network conditions, which might occur in a typical power system. Also, the proof of the stability for the proposed filter has been discussed for a single sinusoid. It hats been found that the proposed algorithm is suitable for real-time! applications especially when the frequency changes are abrupt and the signal is corrupted with noise and other disturbances due to harmonics.
引用
收藏
页码:469 / 479
页数:11
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