Masters Theses

Keywords and Phrases

Active Harmonic Compensatio


"Ideally, electric utilities are expected to deliver a sinusoidal voltage with a constant rated frequency, while customers are expected to draw a sinusoidal current with unity power factor. The recent widespread use of harmonic producing equipment in industrial applications, especially non-linear loads, has increased the distortion of electric currents and voltages in transmission and distribution systems. This thesis proposes a method of using multiple reference frame theory for measuring and mitigating harmonic currents of nonlinear loads using a doubly fed induction generator. The most significant low-order harmonics to be compensated are calculated using a multiple reference frame harmonic observer. This observer is simulated using Matlab® Simulink® and then implemented using the Texas Instruments TMS320F28335 digital signal processor. Experimental and simulation results are provided to verify the analysis of the observer by comparing the results with calculations from the Fourier spectrum. Along with active and reactive power generation, an algorithm is proposed to inject currents in the rotor for the mitigation of harmonics in the system. Simulation results are presented to demonstrate the performance of this proposed method. These results validate the effectiveness of the method in compensating the targeted harmonics in the system. This method of measuring and compensating harmonics discussed in this thesis is accurate, straightforward, easily implemented and effective in the mitigation of any harmonic in the system. The currents obtained in the fundamental reference frame can be further employed for the control of active and reactive power flow"--Abstract, page iii.


Ferdowsi, Mehdi

Committee Member(s)

Corzine, Keith, 1968-
Kimball, Jonathan W.


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


United States. Department of Energy


Missouri University of Science and Technology

Publication Date

Fall 2013


68 pages

Note about bibliography

Includes bibliographical references (page 46).


© 2013 Omkar Amol Ghatpande, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Electric current converters -- Design -- Mathematical models
Harmonics (Electric waves)
Induction generators -- Design -- Mathematical models
Electric machinery, Induction -- Design

Thesis Number

T 10392

Electronic OCLC #