The Open Electrical & Electronic Engineering Journal

2015, 9 : 38-42
Published online 2015 February 19. DOI: 10.2174/1874129001509010038
Publisher ID: TOEEJ-9-38

Harmonic Frequency Estimation Based on Modified-MUSIC Algorithm in Power System

Xiangwen Sun and Ligong Sun
Xiyuan Road, Luoyang, Postcard: 471039, China.

ABSTRACT

This paper presents a new harmonics frequency estimation method. Unlike the conventional harmonic frequency estimation method (fast Fourier transform), the new algorithm is based on spectrum analysis techniques often used to estimate the direction of angle; the most popular is the multiple signal classification (MUSIC) algorithm. The drawbacks of MUSIC algorithm are concluded. Improved-MUSIC approximation algorithm is introduced and compared with FFT based on algorithm for harmonic frequency estimation. Theoretical analysis and simulations show this algorithm is a super- resolution algorithm with small data length.

Keywords:

Harmonic frequency estimation, modified-MUSIC algorithm, Eigen decomposition.