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The paper analyzes the current power system harmonic estimation algorithms which have a considerable number of shortages. In order to improve detection precision and reduce the computational complexity, we can combine the ESPRIT algorithm with improved PASTd algorithm, consequently, achieve the rapid estimation of harmonic frequency. Both theoretical analysis and simulation results show that the algorithm is characterized by better frequency resolution performance and anti-interference ability. Keywords—harmonic estimation; PASTd; MDL; ESPRIT

The Improved PASTd and ESPRIT in Power System Harmonic Estimation Application