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Energies 2013, 6(10), 5552-5569; doi:10.3390/en6105552
Article

Output Current Ripple Reduction Algorithms for Home Energy Storage Systems

,
 and
*
Department of Electrical and Computer Engineering, Ajou University, San 5, Woncheon-dong, Yeongtong-gu, Suwon 443-749, Korea
* Author to whom correspondence should be addressed.
Received: 26 August 2013 / Revised: 14 October 2013 / Accepted: 17 October 2013 / Published: 22 October 2013
(This article belongs to the Special Issue Smart Grids: The Electrical Power Network and Communication System)

Abstract

This paper proposes an output current ripple reduction algorithm using a proportional-integral (PI) controller for an energy storage system (ESS). In single-phase systems, the DC/AC inverter has a second-order harmonic at twice the grid frequency of a DC-link voltage caused by pulsation of the DC-link voltage. The output current of a DC/DC converter has a ripple component because of the ripple of the DC-link voltage. The second-order harmonic adversely affects the battery lifetime. The proposed algorithm has an advantage of reducing the second-order harmonic of the output current in the variable frequency system. The proposed algorithm is verified from the PSIM simulation and experiment with the 3 kW ESS model.
Keywords: second-order harmonic; energy storage system; harmonic compensator; single phase grid connected inverter second-order harmonic; energy storage system; harmonic compensator; single phase grid connected inverter
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Park, J.-H.; Jeong, H.-G.; Lee, K.-B. Output Current Ripple Reduction Algorithms for Home Energy Storage Systems. Energies 2013, 6, 5552-5569.

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