Decoupled Maximum Constant Boost Control for Quasi-Z-Source Inverter

García-Vázquez, Carlos Andrés; Sánchez-Sainz, Higinio; González-Rivera, Enrique; Llorens-Iborra, Francisco; Fernández‐Ramírez, Luis M.

doi:10.1109/eeeic/icpseurope49358.2020.9160623

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…A waveform with variable amplitude and frequency is produced when the square wave's duty cycle varies proportionally to the sine wave's amplitude. Simple boost control, maximum boost control, maximum constant boost control, and third-harmonic injection are the main SPWM modulation techniques (Sabeur et al, 2018;Zhao et al, 2019;Garcia-Vazquez et al, 2020;Xu et al, 2020).…”

Section: Sinusoidal Pwm (Spwm) Control Strategymentioning

confidence: 99%

A Control Scheme for a Quasi-Z Source Three-Phase Inverter

Ortatepe

Ozdemir

2023

Gazi University Journal of Science Part A: Engineering and Innovation

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This paper presents a novel control scheme for a three-phase quasi-z source inverter (qZSI) using a capacitor voltage and input current-based sinusoidal pulse width modulation (SPWM) technique. The proposed scheme combines the advantages of both qZSI and SPWM techniques to achieve improved performance. The SPWM technique utilizes a sinusoidal modulation signal, which is compared with a high-frequency triangular carrier wave and two shoot-through (ST) references to determine the switching states for the three-phase qZSI. The positive and negative ST references are obtained from the capacitor voltages and input current, allowing for control of the DC bus voltage and ST states of the inverter. Additionally, the proposed control scheme generates the three-phase modulation signal through decoupling control in the dq reference frame. The detailed analysis of the control scheme includes its operating principle, transient state, steady-state responses, and the effects of parameter variations. Simulation studies are conducted using MATLAB/Simulink to assess the performance of the three-phase qZSI under the proposed control scheme. The simulation results demonstrate the effectiveness of the control scheme in terms of output voltage quality, DC bus voltage control, and robustness against reference variations. Overall, the proposed capacitor voltage and input current-based SPWM control scheme for the three-phase qZSI shows promising performance improvements and robustness, as confirmed through comprehensive simulation studies.

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Section: Sinusoidal Pwm (Spwm) Control Strategymentioning

confidence: 99%

A Control Scheme for a Quasi-Z Source Three-Phase Inverter

Ortatepe

Ozdemir

2023

Gazi University Journal of Science Part A: Engineering and Innovation

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“…Thus, two classical sinusoidal PWM methods are compared with three Z-Space Vector Modulation (ZSVM) to define maximum excursion of the Trans-ZSI. The PWM techniques, Simple Boost Control (SBC) [1], and Maximum Constant Boost Control (MCBC) [17] present gains equal to or higher than ZSVM methods, although these have relevant advantages of low voltage stress in the switches.…”

Section: System Under Studymentioning

confidence: 99%

Transformer‐Based Z‐Source Inverter with MVDC Link

González-Rivera¹,

García-Vázquez²,

Triviño³

et al. 2022

REPQJ

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Z‐source inverters have attracted considerable attention in renewable energy systems like photovoltaic (PV) systems due to advantages such as buck–boost power conversion in single stage, shoot-through capability, and wide range of input voltage regulation. Transformer-Based Z-source inverters (TransZSI) based on magnetically coupled inductors and reduced number of passive components can be used to improve the boost capacity of these inverters, and to increase the voltage levels. Medium voltage DC (MVDC) is being used more and more in distribution grids and renewable energy systems. This paper presents a transZ-source inverter with MVDC link where renewable energy systems and energy storage systems can be integrated. The active and reactive powers and DC voltage are controlled by acting on the modulation index and shoot-through duty cycle of the converter. The trans-Z-source inverter is evaluated under different operating conditions to illustrate its suitable operation.

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Quasi-Z-Source Inverters in Renewable Power Systems Modeling

Федін

Терещенко

Ямненко

2021

Microsyst., Electron. & Acoust.

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This paper is devoted to in-detail demonstrationand description of the overall functionality and deailed processes in every component of quasi-z-source voltage inverter. Expressions for currents and voltages on all elements of the circuit in standard and "shoot-trough" modes are provided. These ratios demonstrate one of the main technological advantages of the quasi-z-source topology: which is the possibility of the voltage reduction on one of the capacitor that forms the quasi-z-circuitry that led to the overall size and weight reduction of the resulting device and additional reliability increase. Matlab calculations,that are provided in the practical part of the article,fully confirmed the theoretical dependencies. At the same time, obtained practical results of the simulation demonstrated the main advantage of the quasi-impedance topology - the ability to provide a continuous current of the input source without zero pauses. That is additionally confirmed by a graphical representation of transients and the spectrum of the output voltage of the inverter. As the second topic of the article, the problem of the control system operating principle selection was discussed. As it was determined in the process of the previous research and practical modeling of the quasi-z-source inverter, providing a switching of the inverter valves on the frequency that equal to the frequency of the desired output voltage, which for the most of the world’s electrical power systems is equal to 50-60 Hz, is leading to a size and mass increase of the quasi-z-source circuitry, according to its design ratios. Additionally, such component are either not represented in the modern electronic components lineup or providing sufficient energy losses that in some design cases could neglect the voltage boost effect of the quasi-z-source circuitry implementation. To overcome discovered limitations, several PWM control methods were suggested. All of them could be divided into two groups: classic and vector PWM methods. Classic methods are based on combination of the basic PWM modulation techniques that are widely used in conventional full-bridge invertors with the insertion of the “shoot-trough” state activation mode. A model of the control system for the classical approach is offered. It is shown that the method of simple control of the state of "breakdown" is based on the placement of time intervals of the inverter in the state of "breakdown" within the normal period of operation of the bridge inverter. The only difference between the models is the inclusion of an additional constant signal exceeding the amplitude of which the carrier leads to the activation of the “shoot-trough” state.In conclusion the discussion on topic of the classic control methods implementation in up-to-date designs and possibility of its combination with a different modern approaches aimed on a quasi-z-source topology parameters modification are provided.

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Decoupled Maximum Constant Boost Control for Quasi-Z-Source Inverter

Cited by 3 publications

References 18 publications

A Control Scheme for a Quasi-Z Source Three-Phase Inverter

A Control Scheme for a Quasi-Z Source Three-Phase Inverter

Transformer‐Based Z‐Source Inverter with MVDC Link

Quasi-Z-Source Inverters in Renewable Power Systems Modeling

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