A hybrid method for the estimation of power system low-frequency oscillation parameters

Jun-Zhe Yang, Chih-Wen Liu, Wen-Giang Wu
2008 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century  
A hybrid method which combines four different algorithms for low-frequency oscillation parameter estimation using wide-area measurements is presented in this paper. The first algorithm is the discrete Fourier transform which is used to start the low-frequency oscillation estimation process. The second one is the finite-impulse response (FIR) window filter which is employed in filtering unwanted components, and window correction factor is provided to eliminate the side effect of FIR window
more » ... of FIR window filter. The third one is the prototype algorithm which is proposed to estimate low-frequency oscillation parameters, and the last one is the least-square error method which is employed to enhance the computational accuracy by varying the window size. This hybrid method has been implemented in wide-area phasor measurements system by Java language and is under test in Taiwan's power system. Matlab/Simulink simulation and field test results are provided in the present paper. Index Terms-Discrete Fourier transform, least-square error method, low-frequency oscillation, wide-area measurements.
doi:10.1109/pes.2008.4595986 fatcat:zjfkqezxl5cehpwje7a6ib4zia