An efficient Prony´s method for time-varying power system harmonic estimation

In this paper an efficient technique based on Prony´s method for the time-varying power system harmonic estimation is proposed. Although the high frequency resolution is the major advantage of Prony´s method, the great computational burden with the high estimation order usually makes it only suitable for the off-line analysis. To achieve the fast harmonic measurement, a filter-bank structure is proposed to reduce the above computational complexity. Finally, the measurement results are reported to verify the performance of the proposed technique.