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This paper introduces a programmable modular laboratory for undergraduate courses on power electronics and control engineering systems. The proposed system helps the students to get an integral vision about control of power electronics devices. The hardware and software are presented and then a case of study, the implementation of a fuzzy logic based voltage controller of a DC/DC converter, is introduced...
This paper presents the design and implementation of a prototype based on a SEPIC (Single-Ended Primary Inductance Converter) used to measure the characteristic curves of photovoltaic (PV) panels. The SEPIC is controlled to emulate a variable resistance at the output of the PV panel in order to obtain a set of values (voltages and currents) for different operating points at the output of the panel...
This paper presents the operation of a grid-tied photovoltaic power generator considering a two stages configuration for active power injection. A Neutral Point Clamped Inverter (NPC Inverter) was used for the DC-AC conversion and a DC-DC Boost converter complemented the system configuration. The control system includes the following loops: a maximum power point tracking algorithm, a DC bus voltage...
The evolution of power converters towards modular and robust topologies for high power applications has led to the development of multilevel converters. One of the main advantages of this technology is the improvement of the output voltage quality. This article presents the characterization of the output voltage waveform for three five-level multilevel converters (the Neutral Point Clamped-NPC, the...
This paper presents an analysis of two algorithms used to control the active and reactive powers in three phase inverters for grid-tied photovoltaic systems under unbalanced voltages in the Point of Common Coupling (PCC). The algorithms are focused on injecting balanced currents to the grid despite the voltage unbalances. The analysed algorithms are composed of two control loops: the reference signal...
This paper presents the implementation of adaptive LMS, RLS and Kalman filters, for real time estimation of magnitude and phase angle of distorted electrical signals. The filters performance is evaluated by means of the steady-state error, the settling time, among others, through simulations in MATLAB/Simulink. In addition, adaptive filters are implemented in the DS1104 dSPACE development board to...
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