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This paper describes implementation of mathematical analysis based on spectral models and switching functions to simulate operation of three-phase multilevel inverters of the cascaded topologies. Two types of cascaded inverters are considered: conventional one using series connection of the bridges and hybrid topology using both series and parallel connection. It is shown that usage of spectral models...
Multilevel power converters are typically developed for high power applications such as AC drives, energy storage systems, active power filters and compensators. A number of multilevel topologies proposed for these applications. Each topology possesses its own advantages and disadvantages and is used in particular area depending on the system requirement. This paper presents a topology of a hybrid...
Paper presents a model of a shunt active power filter combined with battery energy storage as a unified power conditioning system. It was shown that additional energy storage device in an active power filter makes it possible to extend functionality of the power system. In addition, usage of the parallel inverters with interleaved PWM allowed us to expand the bandwidth of the active power filter....
This paper presents a method for mathematical simulation of different power conversion systems based on diode-clamped multilevel power converters. The method is being a powerful tool for mathematical analysis of any system as far as it allows easy calculation of any power parameters of the system such as THD, WTHD, power factor; efficiency etc. under different operation conditions and control strategies...
This paper offers a technique for calculating the average and RMS values of the switch currents in the single-phase three-level neutral point clamped rectifier. The presented technique is based on the space vector PWM approach. In addition, the mathematical model for the switch currents is described. The plots of conducting losses for different operating modes are obtained.
This paper presents an analysis of the energy quality performance of the neutral point-clamped three-phase four-level converter from the dc-link unbalance influence point of view. The analysis is carried out by the proposed mathematical models. The presented analysis technique can be applied to any n-level NPC rectifier or inverter.
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