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In this paper, it is presented a procedure to simplify the well-known average model as well as to approximate the controller design for a Pulse-Width-Modulation (PWM) based power converter that transforms energy from some DC source (such as batteries or fuel cells) into an AC voltage source. The power converter studied is formed by two stages: a DC-DC bidirectional converter (boost) and a DC-AC H-bridge...
The efficiency of a photovoltaic (PV) system depends on very intermittent environmental variables such as irradiance and temperature. Understanding of the behavior of PV systems in function of these variables depends on mathematical models for PV cells, modules and arrays. This becomes more complex when partial shading occurs. This paper presents three different MATLAB-based modeling strategies for...
This paper develops the droop control strategy to connect multiple different types of converters in parallel in an isolated single-phase low voltage microgrid. First, the traditional droop control for low voltage microgrids is explained. Then three different types of converters in a microgrid are described, and different droop equations are proposed for each converter to overcome the line impedance...
Voltage source inverters use large electrolytic capacitors in order to decouple the energy between the utility and the load, keeping the DC link voltage constant. Decreasing the capacitance reduces the distortion in the inverter input current but this also affects the load with low-order harmonics and generate disturbances at the input voltage. This paper applies the P+RES controller to solve the...
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