Diseño y simulación del control de un transformador de estado sólido de tres etapas con entrada trifásica y salida trifásica basado en un convertidor dc-dc de doble puente activo y un convertidor ac-dc multinivel de puentes en cascada

Abstract

T h e P roject is about the control design a n d sim ulation of a solid state transform er (SST) w ith a th ree-stage topology based on an A C -D C m ultilevel converter based on cascaded bridges D C -D C converter dual active bridge and a D C 4C converter. The solid state transformer is a device that also have the same functionality of a regular transformer improving power quality and allows the integration of renewable energy sources. In addition to the converters, the SST is composed of capacitive, inductive filters and capacitors links. Filters allow you to keep the ripple current and voltage at desired values. For proper operation of the solid-state transformer is important to control the current and voltage signals for each of the stages. This paper shows the control block diagram of eac h stage. To verify proper operation, the SST is designed and simulated using M ATLAB SIM U LINK and additional library P L E C S. Tests are perform ed sim ulating sag and swell in the SST input voltage, testing w ith load that inject harmonics and loads with low power factor, we perform a simulation of a power source connection to the link low SST D C