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This paper introduces a new breed of four-wire (4W) multilevel shunt compensator to deal with either harmonic or reactive power compensation. The converter configurations are generalized for K-stages and the main benefits of proposed topologies lie on i) multilevel waveforms generation, ii) single dc-link unit and iii) modular characteristic. The configurations are based on cascaded transformers along...
This paper introduces and generalizes a class of multilevel dynamic voltage restorer (DVR) for voltage sags/swells compensation of high-power sensitive loads. Such a device can improve the power quality of sensitive loads located in stiff systems. The proposed DVR is based on three-phase bridge converters series-connected by means of cascaded transformers using the concept of open-end winding (OEW)...
This paper proposes a multilevel shunt active power filter (SAPF) to deal with either harmonic currents compensation or reactive power compensation. Such a device can reduce the harmonic distortion at the grid currents provided by non-linear loads located in stiff systems. The proposed SAPF is based on three-phase bridge (TPB) converters connected to cascaded single-phase transformers. The transformers...
This paper proposes a multilevel series compensator (MSC) to deal with: i) voltage sags/swells, ii) harmonic compensation or iii) reactive power compensation. Such a device can be considered as a dynamic voltage restorer (DVR) or a series active power filter (Series-APF). The MSC can improve the power-quality of loads located in stiff systems. The configuration is based on three-phase bridge (TPB)...
This paper proposes a hybrid multilevel topology for Open-End stator Winding (OEW) induction motor drive based on Modular Multilevel Cascade Inverter (MMCI) with Double-Star Chopper-Cells (DSCC) and 2-Level Voltage Source Inverter (2L-VSI). An efficient Voltage Reference Technique is proposed to generate the pole voltages of both inverters. As a result, the DSCC inverter is commanded in high-switching...
This paper presents a three-phase ac drive system to cope with three-phase applications in which high performance and reliability are required with reduced dc-link and switch voltages. The proposed topology employs a single isolation transformer processing only part of the total system power. Another interesting characteristic of the system is to adapt its configuration as a function of the machine...
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