En este trabajo de tesis se presenta el diseño de un convertidor trifásico bidireccional AC-DC con aislamiento galvánico de alta frecuencia. En esta propuesta, las componentes de alta frecuencia generadas por la conversión AC-DC para interacción con la red, son aprovechadas para transferir energía a la carga con aislamiento galvánico, resultando en una configuración de una sola etapa. Para ello, se parte de la configuración de dos etapas, que consiste en un inversor tipo fuente de tensión (VSI) en cascada con un convertidor de doble puente activo (DAB), buscando mantener las ventajas que esta presenta: corriente de red sinusoidal y control de la potencia de salida mediante el ángulo de desfasaje. El estudio del VSI permite obtener las expresiones matemáticas que describen la tensión AC generada; mediante la utilización de una impedancia intermedia del tipo LC (tal como en e...

A design procedure for an RLC damping branch applied at a voltage source inverter followed by an LCL output filter is carried out in this paper. The main purpose of the proposed methodology is to allow the system to operate properly in both grid-connected (GC) and islanded (IS) modes with smooth transitions between them. The usage of passive damping methods to smooth the resonating filters effects is well known. However, the design procedure of the damping branch is specific for either the GC or IS mode, and usually, the parameters tuned for an operation mode are unsuitable for the other one. Thereby, this paper contributes to presenting a methodology design of an RLC branch aimed to achieve damping effect for both operation modes, thus allowing the continuous operation with no hazardous transients during transitions. By means of the proposed approach, the passive elements are adequately...

Ocean waves contain the highest energy density among renewable energy sources. However, harnessing the energy from ocean waves represents a challenge because wave energy converters (WECs) must be designed to have great survivability and efficiency. The power production challenge of any WEC depends on the power take-off (PTO) system efficiency. Maximum power point tracking (MPPT) algorithms have been widely applied in renewable energy from photovoltaic and wind sources, and have subsequently been adapted to wave energy converters (WECs). Energy extraction is optimized by applying MPPT, resulting in an increase in efficiency. This study aims to address the analysis of the influence of the perturb and observe MPPT in the electrical power performance of a WEC composed of a point absorber, a hinged arm and a direct mechanical drive PTO system. The PTO is characterized by a pulley system, a co...