Article

A Modified Harmonics Reduction Technique for a Three-Phase Controlled Converter

King Saud Univ., Riyadh
IEEE Transactions on Industrial Electronics (Impact Factor: 6.5). 04/2008; DOI: 10.1109/TIE.2007.908542
Source: IEEE Xplore

ABSTRACT Three-phase controlled converters have many applications especially in adjustable speed drives and renewable energy. A three-phase controlled converter is a good option in these applications due to its low cost, simplicity, and maintainability with respect to other solutions like a full-bridge insulated gate bipolar transistor converter or a Vienna rectifier. Line current harmonics in this converter is very high; therefore, a harmonics reduction technique is needed to remedy the problem. In this paper, an improved injection current technique is introduced to reduce line current harmonics. The optimal amplitude and phase angle of the injection current for different loads and firing angles have been mathematically determined. Simulation for this technique has been performed by using the PSIM simulation program. An experimental prototype has been built to verify the mathematical and simulation results. The simulation and experimental results show a sensitive variation in the total harmonic distortion of the line current for the amplitude and angle of injection current variations. The simulation and experimental results prove the superiority of this technique in mitigating the requirements for harmonics standards.

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Available from: Ali M. Eltamaly, May 08, 2013
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    ABSTRACT: Three-phase controlled converter has many applications in interfacing renewable energy sources and adjustable speed drives as a rectifier or inverter. The utility line currents of this converter have high harmonic distortion more than the harmonic standards. This research introduces a new technique of circulating third harmonic currents from dc-link to the line currents to reduce its harmonic contents. The new proposed system uses single-phase controlled converter to control the angle of injection current for each firing angle of the three-phase converter. A detailed analysis is introduced to achieve a relation between the firing angles of three and single-phase controlled converters. Also a detailed design for other injection path components is introduced. A simulation and experimental work is introduced to prove the mathematical derivations. Analysis, simulation and experimental results prove the superiority of the proposed technique.
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    ABSTRACT: Three-phase controlled converters have many applications in the utility interfacing of renewable energy sources and adjustable speed drives as a rectifier or inverter. The utility line currents of these converters have a high harmonic distortion, which is more than the harmonic standards. This paper introduces a new technique for circulating the third harmonic currents from the dc-link to the line currents to reduce their harmonic contents. The proposed system uses a single-phase PWM converter to control the angle and amplitude of the injection current for each of the firing angle of a three-phase converter. A detailed analysis is introduced to achieve a relationship between the firing angle of the three-phase controlled converter and the power angle of the PWM converter. In addition, a detailed design for the other injection path components is introduced. A simulation and experimental work is introduced to prove the mathematical derivations. Analysis, simulation and experimental results prove the superiority of the proposed technique.
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  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Three-phase controlled converter has many applications in interfacing renewable energy sources and adjustable speed drives as a rectifier or inverter. The utility line currents of this converter have high harmonic distortion more than the harmonic standards. This research introduces a new technique of circulating third harmonic currents from dc-link to the line currents to reduce its harmonic contents. The new proposed system uses single-phase controlled converter to control the angle of injection current for each firing angle of the three-phase converter. A detailed analysis is introduced to achieve a relation between the firing angles of three and single-phase controlled converters. Also a detailed design for other injection path components is introduced. A simulation and experimental work is introduced to prove the mathematical derivations. Analysis, simulation and experimental results prove the superiority of the proposed technique.
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