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Small-signal stability for parallel-connected inverters in stand-alone AC supply systems

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3 Author(s)
Coelho, E.A.A. ; Sch. of Electr. Eng., Fed. Univ. of Uberlandia, Brazil ; Cortizo, P.C. ; Garcia, P.F.D.

This paper presents a small-signal analysis for parallel-connected inverters in stand-alone AC supply systems. The control technique of the inverters is based on frequency and voltage droops, which depends on the local variable measurements and does not need control interconnections. Simulation and experimental results show that the system is well represented by the small-signal model. Some root locus plots for the system are provided, which make the stability studies and design easier

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Industry Applications, IEEE Transactions on  (Volume:38 ,  Issue: 2 )