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Energies 2013, 6(1), 79-96; doi:10.3390/en6010079
Article

Second-Order Harmonic Reduction Technique for Photovoltaic Power Conditioning Systems Using a Proportional-Resonant Controller

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Received: 17 November 2012 / Revised: 6 December 2012 / Accepted: 17 December 2012 / Published: 2 January 2013
(This article belongs to the Special Issue Solar Energy Systems and Materials)
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Abstract

This paper proposes a second-order harmonic reduction technique using a proportional-resonant (PR) controller for a photovoltaic (PV) power conditioning system (PCS). In a grid-connected single-phase system, inverters create a second-order harmonic at twice the fundamental frequency. A ripple component unsettles the operating points of the PV array and deteriorates the operation of the maximum power point tracking (MPPT) technique. The second-order harmonic component in PV PCS is analyzed using an equivalent circuit of the DC/DC converter and the DC/AC inverter. A new feed-forward compensation technique using a PR controller for ripple reduction is proposed. The proposed algorithm is advantageous in that additional devices are not required and complex calculations are unnecessary. Therefore, this method is cost-effective and simple to implement. The proposed feed-forward compensation technique is verified by simulation and experimental results.
Keywords: second-order harmonic; photovoltaic power conditioning system (PCS); single-phase inverter; proportional-resonant (PR) controller; ripple reduction second-order harmonic; photovoltaic power conditioning system (PCS); single-phase inverter; proportional-resonant (PR) controller; ripple reduction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Jeong, H.-G.; Kim, G.-S.; Lee, K.-B. Second-Order Harmonic Reduction Technique for Photovoltaic Power Conditioning Systems Using a Proportional-Resonant Controller. Energies 2013, 6, 79-96.

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