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This paper presents a DC-AC converter that merges a DC-DC converter and an inverter in a single-stage topology to be used as an interface converter between photovoltaic systems and the electrical AC grid. This topology is based on a full bridge converter with three levels output voltage, where two diodes and one inductor have been added in order to create a Boost converter. The control system of the...
Renewable energy sources such as Photovoltaics (PVs) and Fuel Cells (FCs) generate DC voltage/current and have a high internal resistance/nonlinear V/I dependence, which is why a digitally controlled power electronic interface is always needed to facilitate connection to an AC grid and maximum power extraction. This paper evaluates four single-stage power electronic converters for PVs: the traditional...
With the continuously reducing cost of grid-connected photovoltaic (PV) power generation and the further intensification of energy crisis, grid-connected PV power technology obtains more and more application. The topology for single-phase grid-connected PV system and the control technology based on TMS320LF2407 digital signal processor (DSP) are summarized in this paper. The functions, such as operation,...
In this work, a modular structure to implement one-phase photovoltaic inverters for utility grid connection is presented. The proposed structure uses two canonical elements in energy processing, namely, a loss-free resistor (LFR) based on a boost converter and a power gyrator based on a buck converter. An H-bridge stage performs the DC-AC conversion. The LFR performs the DC impedance matching of the...
The objective of this paper is to propose a novel multi-input inverter for the grid-connected hybrid PV/wind power system in order to simplify the power system and reduce the cost. The proposed multi-input inverter consists of a buck/buck-boost fused multiinput DC/DC converter and a full-bridge DC/AC inverter. The output power characteristics of the PV array and the wind turbine are introduced. The...
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