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In this paper, a dual-loop control scheme is proposed for inverters in three-phase four-wire microgrid applications to improve the power quality within the microgrid and the power quality of the current flowing between the microgrid and the utility grid. The control scheme involves an inner voltage loop and an outer current loop, with both controllers designed using the H∞ repetitive strategy. This...
This paper presents a single-phase Z-source inverter as a power conditioning system for a grid-connected system. Z-source inverter is a single-stage topology that has buck-boost feature, which is possible because of additional shoot through state introduced in zero state of the conventional inverter pulse width modulation and provides desired output AC voltage. Small DG system with alternate energy...
Power quality disturbances, such as voltage sags and instantaneous power interruptions, are probably the most frequent and damaging phenomenon in industrial environments. Thus, to improve the sustainability of electrical equipment, the power supplies should tolerate these disturbances. The PFC boost converter operating in CCM is exhaustively used as a first-stage in the power supplies. The average...
Recently, power quality disturbances such as voltage sags and instantaneous power interruptions are, probably, the most frequent and damaging phenomenon in industrial environments. Thus, to improve the sustain-ability of electrical equipment, the power supplies should tolerate these disturbances. The PFC boost converter operating in CCM is exhaustively used as a first-stage in power supplies. The...
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