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This paper presents the design of a controller based on Internal Model Control (IMC) applied to a grid-connected single-phase PWM inverter. The mathematical modeling of the inverter and the LCL output filter, used to project the 1-DOF IMC controller, is presented and the decoupling of grid voltage by a Feedforward strategy is analyzed. A Proportional – Resonant Controller (P+Res) was used for the...
This paper presents the preliminary results concerning the development of a multistring solar inverter system for dc microgrids. The proposed system is composed of two dc-dc converters as the dc input stage and an ac grid-tied bi-directional full-bridge inverter. Each input dc-dc converter operates with independent MPPT algorithms which are capable of extracting the maximum power even under shading...
This paper presents the design of the One-Degree of Freedom Internal Model Control structure (1-DOF IMC) applied to a single-phase grid-connected inverter. It is presented the mathematical model of the inverter and its LCL filter, used to project the 1-DOF IMC controller, and it is analyzed the internal feedback compensation corresponding to the decoupling of grid voltage provided by a feedforward...
The development of static power converters capable of transforming DC energy obtained from alternative sources into AC has become one of the main challenges in renewable energy systems. In this context, this paper presents a Stand-Alone Transformerless Hybrid Single-Stage Inverter that works with fully controlled waveforms of output voltage and input inductor currents. It also promotes high voltage...
BackgroundOptical coherence tomography (OCT) allows tissue histologic‐like evaluation, but without tissue fixation or staining. We investigated OCT images from tissues obtained at thyroid and parathyroid surgeries to provide a preliminary assessment as to whether these images contain sufficient information for recognition and differentiation of normal neck tissues.
MethodsNormal tissues were obtained...
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