Three-phase controlled/uncontrolled converters have been used in renewable energy applications such as photovoltaic and wind energy as rectifiers and inverters. The main drawback of these converters is the high THD (Total Harmonic Distortion) in their line currents. Many techniques have been used to remedy this problem. Third harmonic current injection is one of the best solutions for the harmonic reduction in line currents of these converters. Injecting third harmonic current from the dc-bus to the line currents reduces its harmonic contents. Minimum THD for any firing angle of the controlled converter is a function of the phase-angle and amplitude of harmonic injection current that can be controlled by a single-phase controlled converter and a boost converter, respectively. This scheme is used with a zigzag transformer to circulate the harmonic injection current to the line currents. A novel mathematical analysis for the proposed scheme and state of the art scheme is introduced. The mathematical analysis introduces the optimum values for components on the harmonic injection path at minimum THD and the corresponding efficiency. The scheme under study has been simulated using the PSIM program. A lab prototype for this scheme has been implemented. Mathematical, simulation, and experimental results for this scheme have been introduced, compared, and discussed. The results show the superiority of the proposed scheme.
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July 2017
Research Article|
August 07 2017
A novel current injection device for harmonic reduction of three-phase controlled converters in renewable energy utility interfacing
Ali M. Eltamaly
Ali M. Eltamaly
Sustainable Energy Technologies Center, King Saud University, Riyadh, Saudi Arabia and Electrical Engineering Department, Mansoura University
, Mansoura, Egypt
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J. Renewable Sustainable Energy 9, 045504 (2017)
Article history
Received:
November 19 2016
Accepted:
July 22 2017
Citation
Ali M. Eltamaly; A novel current injection device for harmonic reduction of three-phase controlled converters in renewable energy utility interfacing. J. Renewable Sustainable Energy 1 July 2017; 9 (4): 045504. https://doi.org/10.1063/1.4997494
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