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Energies 2016, 9(6), 457; doi:10.3390/en9060457

New Scheme for Seamless Operation for Stand-Alone Power Systems

Department of Electrical Engineering, Myong-ji University, 116 Myongji-ro, Yongin-si, Gyeonggi-do 449-728, Korea
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Academic Editor: Neville R. Watson
Received: 21 April 2016 / Revised: 31 May 2016 / Accepted: 1 June 2016 / Published: 15 June 2016
(This article belongs to the Collection Smart Grid)
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Abstract

On remote islands photovoltaic (PV) panels with battery energy storage systems (BESSs) supply electric power to customers in parallel operation with engine generators (EGs) to reduce fuel consumption and environmental burden. A BESS operates in voltage control mode when it supplies power to loads alone, while it operates in current control mode when it supplies power to loads in parallel with the EG. This paper proposes a smooth mode change of the BESS from current control to voltage control by using initial value at the output of integral part in the voltage controller, and a smooth mode change from voltage control to current control by tracking the EG output voltage to the BESS output voltage using a phase-locked loop (PLL). The feasibility of the proposed scheme was verified through computer simulations and experiments with a scaled prototype. View Full-Text
Keywords: photo voltaic (PV) panels; battery energy storage system (BESS); engine generator (EG); voltage control; current control; phase-locked loop (PLL); seamless operation photo voltaic (PV) panels; battery energy storage system (BESS); engine generator (EG); voltage control; current control; phase-locked loop (PLL); seamless operation
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. (CC BY 4.0).

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Kim, H.-J.; Lee, Y.-S.; Han, B.-M.; Yoon, Y.-D. New Scheme for Seamless Operation for Stand-Alone Power Systems. Energies 2016, 9, 457.

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