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- W2912791062 abstract "In this paper, a single-phase extended-boost quasi-Z source (EqZS) cascaded multilevel inverter (CMI) for photovoltaic power systems is proposed. A phase-shifted pulse width amplitude modulation strategy based on dual switching frequency modulation (DFM-PWAM) for the inverter is also presented. Compared to the traditional quasi-Z source inverter, the EqZS network can significantly increase the dc-link voltage and achieve a higher voltage gain. Due to the inherent double-line-frequency (2ω) voltage and current ripples in the single-phase EqZS inverter (EqZSI), an accurate equivalent model based on the EqZSI module is established to design rational parameters of the EqZS network, which can limit the 2ω ripples in the required range. However, large capacitance and inductance are needed to restrain 2ω ripples through this method, which results in a bulky impedance-source network. Higher switching frequency can reduce the size of the impedance-source network but will increase the switching losses due to hard-switching. The proposed DFM-PWAM technique can not only keep a compact impedance-source network but also mitigate the switching frequency effect on the switching losses. Finally, simulation and experimental results validate the feasibility of the proposed topology and modulation technique and the correctness of theory." @default.
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- W2912791062 date "2019-01-01" @default.
- W2912791062 modified "2023-10-17" @default.
- W2912791062 title "A novel phase-shifted pulse width amplitude modulation for extended-boost quasi-Z source cascaded multilevel inverter based on photovoltaic power system" @default.
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- W2912791062 doi "https://doi.org/10.1063/1.5058754" @default.
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