Enhanced-Boost Z-Source Inverters With Switched Z-Impedance

Fathi, Hossein; Madadi, Hossein

doi:10.1109/tie.2015.2477346

Cited by 167 publications

(141 citation statements)

References 29 publications

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“…This is a single-stage power converter topology that employs a capacitor-inductor network and has voltage-boost and voltage-buck capabilities [6][7][8]. The qZS-network utilizes shoot-though states to boost the input voltage and regulate the DC link voltage for the inverter.…”

Section: Finite Control Set Model Predictive Control For Gridtied Quamentioning

confidence: 99%

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Trabelsi

Bayhan

Abu‐Rub

et al. 2016

2016 IEEE International Conference on Industrial Technology (ICIT)

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Section: Finite Control Set Model Predictive Control For Gridtied Quamentioning

confidence: 99%

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Trabelsi

Bayhan

Abu‐Rub

et al. 2016

2016 IEEE International Conference on Industrial Technology (ICIT)

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“…The topologies as presented in [14][15][16][17][18][19] enhance the boost factor as compared to traditional ZSIs and qZSIs. Recently, an enhanced boost ZSI (EB-ZSI) [20], a modified capacitor assisted ZSI (MCA-ZSI) [21], and an embedded switched inductor quasi ZSI (ESL-qZSI) [22] have been used in conjunction with the shoot-through state of the pulse width modulation (PWM) scheme. The topologies in [20][21][22] clearly depict that the boost factor is significantly improved.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, an enhanced boost ZSI (EB-ZSI) [20], a modified capacitor assisted ZSI (MCA-ZSI) [21], and an embedded switched inductor quasi ZSI (ESL-qZSI) [22] have been used in conjunction with the shoot-through state of the pulse width modulation (PWM) scheme. The topologies in [20][21][22] clearly depict that the boost factor is significantly improved. However, the voltage stresses across the capacitors and semiconductor switches are also increased in these topologies due to the enhancement of the boost factor using the shoot-through state.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Modernized Z-Source Inverter for Robust Boost Control in Photovoltaic Power Conditioning Systems

et al. 2019

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In this paper, the performance of a new Z-source inverter (ZSI)-based single-stage power conditioning system (PCS) is analyzed for a standalone photovoltaic (PV) power generation system. The proposed ZSI-based PCS includes two main parts: one is the input from PV units and the other is the ZSI. In this work, a new topology, termed the switched inductor-assisted strong boost ZSI (SL-SBZSI), is introduced for improving the performance of the PCS. The proposed topology shows high boosting capability during the voltage sag in PV units due to variations in solar irradiation and temperature. Another key advantage is the reduced capacitor voltage stress and semiconductor switch voltage stress of the inverter bridge, which ultimately minimizes the size and cost of the single-stage PCS. The proposed ZSI topology falls under the doubly grounded category of inverter by sharing the common ground between the input and output. This is an additional feature that can minimize the leakage current of PV units at the ac output end. The operational principles, detailed mathematical modeling, and characteristics of the proposed SL-SBZSI for a standalone photovoltaic (PV) power generation system is presented in this paper for analyzing performance. The simulation results, which are performed in MATLAB/Simulink, demonstrate the improved performance of the proposed SL-SBZSI for the standalone PV system. The performance of the proposed topology is also evaluated through an experimental validation on a laboratory-based PV system. the world was around 90 GW in 2012 and the target amount is estimated as approximately 350 GW by the end of 2020. Evidently, PV energy is one of the most promising sources for mitigating future load demands.Generally, PV energy is received from sun, and its extraction involves a large installation cost. The basic cost of this system relies on the photovoltaic panels and the interfacing power electronic converter that couples the source with the load. This part is commonly known as the power conditioning system (PCS). Figure 1 represents the traditional boost converter-based dual-stage and the Z-source inverter (ZSI)-based single-stage PCS. The main function of the PCS is to convert the output DC voltage of the PV unit into 50/60 Hz AC voltage suitable for households and grid applications. Traditionally, a voltage source inverter (VSI) with a DC-DC boost converter comprising the dual-stage PCS is used to convert the DC output power into AC power [7]. This additional DC-DC boost converter increases the size and cost of the PV power generation system. A ZSI for PV systems as presented in [8] obsoletes the additional boost converter with its distinct impedance network. Due to its shoot-through characteristics, the ZSI-based PCS can boost the input voltage of the PV system during voltage fluctuations due to changes in solar irradiation and environmental temperature. Although the ZSI turns the dual-stage traditional system into a single-stage system, it inherits some certain drawbacks regarding its performance, such as...

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“…Recently, single-phase single-stage PV inverters, especially impedance source (Z-source) based inverters, draw much attention due to its high voltage-boosting capability [11]- [13], enabling a single-stage step-up DC-AC inversion. Although the Z-source inverter was firstly developed for motor drives [14], intensive research focusing on renewable energy applications has been reported in the past years, e.g., in terms of dc-link voltage shaping for reducing the requirement of large dc capacitors [15], high voltage gain for grid-connected PV applications [16], and reduced leakage currents for grid-tied inverters [17].…”

Section: Introductionmentioning

confidence: 99%

A transformerless single-phase symmetrical Z-source HERIC inverter with reduced leakage currents for PV systems

Shen

Yang

et al. 2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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. (2018). A transformerless single-phase symmetrical Z-source HERIC inverter with reduced leakage currents for PV systems. In 2018 IEEE Applied Power Electronics Conference and Exposition (APEC) (pp. 356-361). IEEE Press. https://doi.org/10.1109/APEC.2018.8341035 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.? Users may download and print one copy of any publication from the public portal for the purpose of private study or research. ? You may not further distribute the material or use it for any profit-making activity or commercial gain ? You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access to the work immediately and investigate your claim. Abstract-A transformerless single-phase symmetric Z-source HERIC inverter featuring low leakage currents is presented in this paper. It is an attempt to utilize the Highly Efficient and Reliable Inverter Concept (HERIC) and an impedance source (Z-source) network to maintain a constant common mode voltage and thus low leakage currents in PV applications. The symmetric Z-source HERIC inverter requires two extra active switches. Nevertheless, the operation frequency of the two switches is the line frequency, leading to negligible losses. More importantly, the performance in terms of low leakage currents and harmonics is improved. Experimental tests are performed to validate the analysis and performance of the proposed system.

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Enhanced-Boost Z-Source Inverters With Switched Z-Impedance

Cited by 167 publications

References 29 publications

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Performance Analysis of a Modernized Z-Source Inverter for Robust Boost Control in Photovoltaic Power Conditioning Systems

A transformerless single-phase symmetrical Z-source HERIC inverter with reduced leakage currents for PV systems

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