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A 5V analog maximum power point tracking (MPPT) controller integrated circuit (IC) based on ripple correlation control was presented in this study to achieve the maximum power from the photovoltaic array or solar panel under partial shading during the first 72 hours following a disaster when power interruptions and inaccessibility to light may be expected. The IC was implemented in TSMC 0.25 micron...
This paper develops a global model of a two-stage grid-connected microinverter which uses sliding-mode control laws in both stages. In the study, it is considered that the microinverter is fed by a current source representing the photovoltaic module with a capacitor connected in parallel. The model of the DC-DC stage is obtained from the linearization of the ideal sliding dynamics of the converter...
One of the more relevant aspects to improve the two-stage microinverter architecture consists on reduce the size of the required decoupling capacitor in order to enable the use of technologies with a greater service life such as thin-film capacitors. However, the diminution of the capacitor size introduces a deterioration of the power quality level at the grid side because the ripple component of...
The dynamic behavior and stability analysis of a quadratic boost converter for high conversion ratio applications is addressed. After studying the stability of the system by using the monodromy matrix, a closed form stability condition is used for predicting the boundary of subharmonic oscillation in the system in terms of the duty cycle and the slope of the ramp modulator. The derived theoretical...
This paper presents the analysis of the quadratic boost converter operating in sliding-mode control in order to obtain high DC-gain. This approach uses a indirect control of the output voltage based on the use of a sliding surface defined with the input inductor current. The control law is argued through a stability test. The proposed control was implemented in MATLAB simulations with a quadratic...
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