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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

,
 and
*
Department of Electrical and Computer Engineering, Ajou University, San 5, Woncheon-dong, Yeongtong-gu, Suwon 443-749, Kyunggi-do, Korea
* Author to whom correspondence should be addressed.
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 (CC BY 3.0).

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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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