Hydrogen based configurations for an overhead crane with quasi-Z-source inverter

García‐Triviño, Pablo; Sarrias‐Mena, Raúl; García-Vázquez, Carlos Andrés; Llorens-Iborra, Francisco; Sánchez-Sainz, Higinio; Fernández‐Ramírez, Luis M.

doi:10.1016/j.seta.2023.103297

Cited by 1 publication

(1 citation statement)

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“…Over the years, they have gained significant attention due to their distinctive features and capabilities, such as the inherent short-circuit protection, continuous input current, easy integration of batteries, and enhanced reliability. These qualities make qZSIs particularly well-suited for low-voltage-fed applications, such as photovoltaic (PV) [2][3][4] or fuel cell-based systems [5,6]. The voltage boost capability of qZSIs is achieved by utilizing an additional, shoot-through (ST) switching state and the input impedance network comprising two inductors, two capacitors, and a diode.…”

Section: Introductionmentioning

confidence: 99%

Novel Space-Vector PWM Schemes for Enhancing Efficiency and Decoupled Control in Quasi-Z-Source Inverters

Grgić,

Bašić,

Vukadinović

et al. 2024

Energies

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This paper investigates the development of pulse width modulation (PWM) schemes for three-phase quasi-Z-source inverters (qZSIs). These inverters are notable for their voltage boost capability, built-in short-circuit protection, and continuous input current, making them suitable for low-voltage-fed applications like photovoltaic or fuel cell-based systems. Despite their advantages, qZSIs confront challenges such as increased control complexity and a larger number of passive components compared to traditional voltage source inverters (VSIs). In addition, most existing PWM schemes for qZSIs lack the capability for independent control of the amplitude modulation index and duty cycle, which is essential in closed-loop applications. This study introduces innovative space-vector PWM (SVPWM) schemes, addressing issues of independent control, synchronization, and unintentional short-circuiting in qZSIs. It evaluates several established continuous and discontinuous PWM schemes, and proposes two novel decoupled SVPWM-based schemes that integrate dead time and in which the shoot-through occurrence is synchronized with the beginning of the zero switching state. These novel schemes are designed to reduce switching losses and improve qZSI controllability. Experimental validation is conducted using a custom-developed electronic circuit board that enables the implementation of a range of PWM schemes, including the newly proposed ones. The obtained results indicate that the proposed PWM schemes can offer up to 6.8% greater efficiency and up to 7.5% reduced voltage stress compared to the closest competing PWM scheme from the literature. In addition, they contribute to reducing the electromagnetic interference and thermal stress of the related semiconductor switches.

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