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Control of distributed generation systems-Part I: Voltages and currents control

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2 Author(s)
M. N. Marwali ; Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA ; A. Keyhani

This paper discusses a digital control strategy for three-phase pulse-width modulation voltage inverters used in a single stand-alone ac distributed generation system. The proposed control strategy utilizes the perfect robust servomechanism problem control theory to allow elimination of specified unwanted voltage harmonics from the output voltages under severe nonlinear load and to achieve fast recovery performance on load transient. This technique is combined with a discrete sliding mode current controller that provides fast current limiting capability necessary under overload or short circuit conditions. The proposed control strategy has been implemented on a digital signal processor system and experimentally tested on an 80-kVA prototype unit. The results showed the effectiveness of the proposed control algorithm.

Published in:

IEEE Transactions on Power Electronics  (Volume:19 ,  Issue: 6 )