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`Thin' power electronics concentrates on the design of minimal and cost effective power converters. Part of the research effort targets the direct processing of an AC input to an AC output without the use of an intermediate DC stage. Particular examples include the inverterless active filter and the controllable network transformer, both of which in their simplest form employ a buck switcher as the...
Grid-connected voltage source converters using an LCL filter offer reduced harmonics in the grid current. The system modeling results in a multivariable system with cross coupling. Additionally, the system contains three state-variables instead of the one occurring in the case of grid connection using only one inductance. All the three variables must be measured or estimated. Also, the LCL filter...
The intensive use of voltage source converters (VSCs) in grid-connected applications requires control strategies that should be robust against voltage transients, such as voltage dips. The voltage dips are mainly caused by short-circuit faults; many of them last only a few tens or hundreds of milliseconds and they are unbalanced in most cases. The grid connected VSC from back to back structures is...
This paper deals with the improvement of the voltage quality of the AC/AC choppers delivered to the loads in a way to minimize the harmonics continents and to increase the power factor of the voltage source. Indeed a lot of works were done in this field using several algorithms to fulfill the objective mentioned. In the present work the Swarm Particle Optimization (PSO) algorithm is used to achieve...
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