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In recent years, five leg inverter and nine switch inverter have been proposed. Those can independently control two three-phase loads. This paper proposes a novel structure for Five-Leg Inverter (FLI) named Z-source FLI. This inverter has ten switching devices and can independently control two three-phase loads with high voltage range. First, the construction of the Z-source FLI is introduced and...
Most of the reported control algorithms for uninterruptible power supplies use either inductor currents or capacitor currents of their filter as feedback variables to regulate the output voltage. This paper proposes a simple non linear control using current and voltage of a DC/AC inverter of an isolated three phase power network. Theoretical analysis and simulation results demonstrate fast response,...
A practical relay algorithm for detecting High Impedance Fault (HIF) is proposed, in which an operational procedure in conjunction with a novel computational algorithm is proposed that has solved the problem of determination of HIF relay’s settings, in order that both dependability and security are maintained. In addition, these settings can be tuned according to the changes in the feeder conditions,...
Distributed generation (DG) of electrical energy is predicated to play an important role in the electric power system in the near future because in efficiency of the energy conversion process and their limited emission of pollutants. In the other hand, the high speed permanent magnet (PM) generators driven by micro turbines have been widely investigated since they have a small size, a high efficiency...
This paper deals with a topology without the entrance filter allowing the control of the power flow between a fuel cell, a storage device constituted by a supercapacitor bank and a load. The proposed control doesn't use algorithm commutation when the operating mode changes with the load power variation, and thus avoids chattering effects. Moreover it ensures that the power delivered by the fuel cell...
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