Overview of impedance source networks for voltage source inverters

Shults, Tatiana E.; Husev, Oleksandr; Zaķis, Jānis

doi:10.1109/edm.2015.7184596

Cited by 13 publications

(7 citation statements)

References 35 publications

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“…To extend the input voltage regulation range, solutions based on Impedance-Source (IS) networks have been proposed [5]- [11]. They have a buck mode, a boost mode and do not suffer from the Shoot-Through (ST) [5] states compare to the conventional grid-connected inverters.…”

Section: Introduction Present Technologies and Innovations Have Led T...mentioning

confidence: 99%

“…Also, the shading or high operating temperature of the PV module leads to a significant out-voltage drop. Therefore, the converter for a PV system should have a wide input voltage and output load regulation range.To extend the input voltage regulation range, solutions based on Impedance-Source (IS) networks have been proposed [5]- [11]. They have a buck mode, a boost mode and do not suffer from the Shoot-Through (ST) [5] states compare to the conventional grid-connected inverters.…”

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confidence: 99%

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Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

Shults

Husev

Blaabjerg

et al. 2019

IEEE Trans. Power Electron.

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IEEE Transactions on Power Electronics Abstract-This paper presents new Space Vector Pulse-Width Modulation (SVPWM) strategies for a single-phase three-level buck-boost Neutral Point Clamped (NPC) inverter coupled with Impedance-Source (IS) networks. These strategies can be implemented for systems with any IS networks with neutral point. The case study system is based on the quasi-Z-source inverter with continuous input current. To demonstrate an improved performance, the strategies are compared with a traditional pulsewidth modulation strategy. The advantages lie in reduced switching number, without output voltage quality distortion. The simulation and experimental results confirm the theoretical predictions. I. INTRODUCTION Present technologies and innovations have led to the expansion of Photovoltaic (PV) energy generation systems worldwide [1]-[4]. PV energy sources are characterized by a wide output voltage and power variation. The solar irradiation level changes significantly during the day and gives a variable output power. Also, the shading or high operating temperature of the PV module leads to a significant out-voltage drop. Therefore, the converter for a PV system should have a wide input voltage and output load regulation range.To extend the input voltage regulation range, solutions based on Impedance-Source (IS) networks have been proposed [5]- [11]. They have a buck mode, a boost mode and do not suffer from the Shoot-Through (ST) [5] states compare to the conventional grid-connected inverters.

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Section: Introduction Present Technologies and Innovations Have Led T...mentioning

confidence: 99%

mentioning

confidence: 99%

Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

Shults

Husev

Blaabjerg

et al. 2019

IEEE Trans. Power Electron.

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“…Since the first appearance of Z-source inverter (ZSI) in 2006, many forms of modified and new impedance networks have been developed with (Buck and Boost) capabilities [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This field is very wide and opens new doors in power electronics for different applications.…”

Section: III Literature Surveymentioning

confidence: 99%

A Comprehensive Review of Grid-Connected PV Systems Based on Impedance Source Inverter

et al. 2022

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The increase in linking photovoltaic (PV) power plants to utility grids are due to the world expansion in PV systems and its advantages of low running cost, renewable, etc. Although PV is now considered one of the main power sources in many countries, it has low efficiency. Therefore, the big issue to improve the efficiency is to enhance the interface inverters' efficiency. Different inverter topologies have been proposed to relate to the PV panels; each has advantages and disadvantages. These topologies can be classified into two-stage and single-stage (impedance network) inverters. Impedance network inverters overcome the problems of traditional inverters and seek to realize the advantages of a two-stage system and reduce the number of power conversions. However, to the authors' best knowledge, there is no comprehensive review of the applications of the impedance source inverter for the PV system, including the control techniques. Therefore, this paper reviewed the existing topologies by paying attention to four key research issues: 1) various impedance network inverters and discusses the main structures from the point of view of the PV application, 2) control techniques suitable for impedance source inverters, comparing them in terms of complexity and theoretical performance, 3) investigation into the most important control methods used to connect the inverter output current with the network voltage, and 4) Challenges and future direction. Finally, this paper is provided as a brief reference to help researchers choose the appropriate impedance source inverter topologies for their applications and the preferred control and modulation methods for this type.

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“…Many impedance networks have been reported for realizing converters with high boost ability. In [1][2], the Boost, Boost-Buck circuits are combined with TSMC can make the voltage transmission ratio reach 1. However, due to the large number of components, the compactness of the system is reduced and it is difficult to control.…”

Section: Introductionmentioning

confidence: 99%

Y-Source Two-Stage Matrix Converter and Its Modulation Strategy

et al. 2020

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Aiming at the defect of low voltage transfer ratio of two-stage matrix converter(TSMC), the proposed topology combines the Y-source network with the TSMC to form the Y-source two-stage matrix converter(YSTSMC) in this paper, and proposes its modulation strategy. The Y-source network is located in the dc-link of TSMC, and uses a tightly coupled inductor with three windings to transfer energy, which can increase voltage transfer ratio. Based on the mathematical model of the Ysource network, a small-signal model is established and dynamic analysis is performed. The analysis result of the impact of the output voltage of the rectifier stage on the output voltage of the system can be obtained. The space vector pulse width modulation (SVPWM) strategy is proposed to control YSTSMC, and according to the fluctuation of dc-link voltage, the modulation ratio of inverter stage is corrected in real time. By analyzing the voltage transfer ratio of YSTSMC, and the calculation expression of the maximum voltage transfer ratio is obtained. Finally, the experimental results are provided to verify the feasibility and validity of the proposed method.

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Overview of impedance source networks for voltage source inverters

Abstract: This paper provides an analytical overview of different impedance sources networks. General classification and main properties of different impedance source networks and their modifications are summarized and presented.

Cited by 13 publications

References 35 publications

Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters

A Comprehensive Review of Grid-Connected PV Systems Based on Impedance Source Inverter

Y-Source Two-Stage Matrix Converter and Its Modulation Strategy

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