同步相量和頻率測量最優(yōu)濾波器設計
[Abstract]:Aiming at the principle of synchronous phasor measurement based on finite length unit impulse response (finite impulse response,FIR) digital filter, the relationship between the measurement error caused by fundamental wave, harmonic and noise and the frequency response characteristic of filter is deduced theoretically. In this paper, several technical indexes of filters are defined, and the optimal design criteria of FIR digital filter banks for synchronous phasor and frequency measurement are established by establishing the functional relationship between the total vector error and frequency measurement error and these technical indexes. Secondly, according to the principle of discrete Fourier transform (discrete Fourier transform,DTF) class dynamic phasor measurement, the equivalent digital filter bank of this kind of algorithm is deduced, and the optimization problem is solved according to the optimal design criterion, and the optimal selection of the free parameters of the filter is carried out. The optimal design of the filter is realized. The phasor measuring filter with the lengths of 2 / 3 and 4 Zhou Bo and the design results of the 4 and 5 Zhou Bo frequency measuring filter banks are given respectively. Finally, the performance of the optimal design algorithm of the same length is compared with that of the 4 Zhou Bo TWLS algorithm, which is superior in the related performance evaluation. The simulation results show that the performance of the two algorithms is very close to the superior performance in both static and dynamic tests. In the aspect of anti-harmonic performance, the optimization algorithm has obvious advantages.
【作者單位】: 電力系統(tǒng)及發(fā)電設備控制和仿真國家重點實驗室(清華大學);國網(wǎng)吉林省電力有限公司;
【分類號】:TN713
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