Abstract—a modified filter strategy for harmonic elimination is introduced in this paper. The proposed approach eliminates all harmonics component from the signal (current or voltage) and it requires only knowledge of fundamental frequency of the signal. The proposed filter eliminates undesirable harmonics from periodic signal using adaptive algorithm. Adaptation process adjusts weights to exactly match amplitude and phase of fundamental frequency component and the outputs of the filter is a harmonics replica and are subtracted from the original periodic signal waveform to eliminate them. The bipolar waveforms are roughly analyzed and considered case of square wave pattern which contain all odd harmonics. The simulation results show that the method can effectively eliminate undesirable harmonics and result in low(less than two percentage) total harmonic distortion (THD).

Index Terms—Harmonics Elimination, LMS Algorithm, Selective harmonic elimination, Square wave generator.

S. V. Rode is with the Sipna’s college of Engineering and Technology, Amravati, Maharashtra INDIA. (e-mail: sandeeprode30@yahoo.com).
S. A. Ladhake is with the Sipna’s college of Engineering and Technology, Amravati, Maharashtra INDIA.

Cite: Sandeep V. Rode and Siddharth A. Ladhake, "A  Modified  Method  for  Harmonic  Elimination,"
International Journal of Computer and Electrical Engineering vol. 3, no. 4, pp. 493-496, 2011.