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Control of Distributed Uninterruptible Power Supply Systems

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3 Author(s)
Guerrero, J.M. ; Dept. of Autom. Control & Comput. Eng., Tech. Univ. of Catalonia, Barcelona ; Lijun Hang ; Uceda, J.

In the last years, the use of distributed uninterruptible power supply (UPS) systems has been growing into the market, becoming an alternative to large conventional UPS systems. In addition, with the increasing interest in renewable energy integration and distributed generation, distributed UPS systems can be a suitable solution for storage energy in micro grids. This paper depicts the most important control schemes for the parallel operation of UPS systems. Active load-sharing techniques and droop control approaches are described. The recent improvements and variants of these control techniques are presented.

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Industrial Electronics, IEEE Transactions on  (Volume:55 ,  Issue: 8 )