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One of the major drawbacks of Finite Control Set — Model Predictive Control (FCS — MPC), is the high switching frequency, besides a spread harmonic spectrum. Despite of this, the FCS — MPC provides excellent speed to changes of references and disturbances. In this work we present a control strategy based on FCS — MPC that allows a reduction of the switching frequency in steady state, increasing the...
The utilization of multi-cell converters, based on low voltage semiconductors, has allowed the implementation of AC drives and PV farms in medium and high voltage levels. The conventional converter uses in the grid side a multipulse transformer that performs the cancellation of low frequency current harmonics, which are generated by the three-phase diode-based rectifiers included in the power cells...
Design criteria are addressed to select the parameters of an asymmetric multilevel shunt active power filter based on a Cascaded H-Bridge topology. The proposed approach is meant to simultaneously compensate both fundamental reactive power and current harmonics. The presented methodology allows to systematically design the main parameters of the power converter, particularly the inductive filter,...
The utilization of multi-cell converters, through the use of low voltage semiconductors, has permitted to implement medium and high voltage applications as PV farms and AC drives. In conventional AC drives, this converter requires an input multipulse transformer, which allows the low frequency harmonic cancellation that are generated by the three-phase diode rectifiers included in each cell. This...
Multilevel converters are widely used in medium voltage applications. One of the most popular topologies in this field is the 18 pulses diode rectifier, which uses a mu Iti pu I so transformer that realizes a current harmonics cancelation that are generated by the three phase diode rectifiers. In this work an efficiency comparison of the aforementioned topology and a Multi-Cell Active-Front-End (AFE)...
An operating region comparison is performed between a symmetric and an asymmetric CHB Multilevel Shunt Active Power Filter aimed to simultaneously compensate linear and nonlinear currents. The symmetric approach considers that all the power cells injects the same voltage; while the asymmetric case consists in the inclusion of two types of power cells; one of them meant for fundamental reactive power...
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