Abstract
In this paper, a detailed and systematic derivation of the output filter in a novel dual-input photovoltaic (PV)-wind converter (DIPWC) is presented. The theoretical derivation is based on an energy balance principle. While the DIPWC operates in steady state, the amount of charged energy of the output filter will be equal to that of the energy pumped away within one switching cycle. From this zero net change in energy, the minimum value of the output filter can be found. With the determined value, the DIPWC is able to operate in continuous conduction for high power applications. The developed procedure of the inductance determination can be applied to other types of dual-input converters. Therefore, it makes significant contributions to the design toward a green-energy, multi-input converter. To verify the correctness of the mathematical analysis, the DIPWC—with the derived output inductance—is built and tested. Practical measurements and results have verified the inductance determination.
Highlights
Nowadays, renewable energies, such as photovoltaic (PV), wind energy and hydroelectric, have been widely adopted as alternatives to fossil fuels
Conceptual waveforms of gate signals and output inductor voltage and current are illustrated in Figure 6, in which the switches SW1,wind and SW2,wind are closed for DwindTs and SW1,pv and SW2,pv are closed for DpvTs, respectively
To verify the correctness of the theoretical analysis in this paper, a 1-kW prototype with the specifications summarized in Table 2 is built
Summary
Renewable energies, such as photovoltaic (PV), wind energy and hydroelectric, have been widely adopted as alternatives to fossil fuels. A hybrid power system—including two or more input sources—has become the design trend for renewable energy processing, in which a constant output voltage and sustained power supply can be completed [1–6]. Adopting a clamp circuit or snubber may be an approach to alleviate the mentioned voltage spike and to reduce power loss [24]. This approach increases the power component count and cannot improve the voltage conversion ratio. A novel power DIC is presented, which can process PV power and wind-turbine energy simultaneously or individually and its so called novel dual-input PV-wind converter (DIPWC). Energy simultaneously or individually and its so called novel dual-input PV-wind converter.
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