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Grid connected quasi-Z-Source direct matrix converter
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013This paper proposes a new three-phase ac-ac converter topology based on the Z-source concept and the conventional direct matrix converter (DMC), it is called quasi-Z-Source direct matrix converter (QZSDMC). It could provide buck-boost function and make the role of frequency changer.
Omar Ellabban, Haitham Abu-Rub
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A Digital Current Control of Quasi-Z-Source Inverter With Battery
IEEE Transactions on Industrial Informatics, 2013This paper presents a fixed frequency operating sliding mode (SM) current control method with fast response and improved stability. Different from the conventional SM control with variable switching frequency, the fixed-frequency SM controller is proposed to control the modulation index and shoot-through duty ratio of the voltage-fed quasi-Z-source ...
Jianfeng Liu +3 more
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Operating region of a three-phase quasi-Z-source inverter
2017 IEEE International Conference on Industrial Technology (ICIT), 2017The impedance source inverter family has become one of the most interesting alternatives for wind and photo-voltaic energies applications which require high conversion ratio. The main drawback of these inverters is related to the modulation signal which must be used to control the output current and voltage conversion ratio simultaneously. To deal with
Ana-Maria Llor +2 more
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Bidirectional cascaded quasi-Z-source DC-DC converter
IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014This paper proposes bidirectional cascaded quasi-Z-source dc-dc converter (BC-qZSC). Compared to the traditional cascaded quasi-Z-source network (C-qZSN), the diodes in C-qZSN are replaced by active switches with a parallel diode. BC-qZSC has the higher boost ability and the lower input current ripple than those of the bidirectional quasi-Z-source dc ...
Takaharu Sato +3 more
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Modeling and Control of Single-Phase Quasi-Z-Source Inverters
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Compared with a conventional two-stage inverter, the quasi-Z-source inverter (qZSI) has several advantages for renewable applications because of its buck-boost capability and continuous input current. This paper addresses modeling and control issues resulted from the impedance-source network resonance. Considering shoot-through states, null states, and
Wenjie Liu +3 more
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Loss Analysis of Quasi Z-source Inverter with Superjunction-MOSFET
IEEJ Transactions on Industry Applications, 2018AbstractA Z‐source inverter (ZSI) can work as an inverter with boost capability in one stage by using its impedance source and the short‐through mode as the switching mode. This paper discusses the circuit losses that depend on the boost ratio between the quasi ZSI, which is one of the ZSI topologies, using Superjunction‐MOSFETs and the conventional ...
Naoki Kamoshida +3 more
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Modeling and SVPWM control of quasi-Z-source inverter
11th International Conference on Electrical Power Quality and Utilisation, 2011In today's renewable energy power generation systems, inverters have become key devices connected between energy sources and power grids. The newly presented quasi-Z-source inverter (qZSI) has the unique advantages of boosting DC bus voltage without additional boost link, lower component ratings, as well as constant DC input current compared with the ...
Yushan Liu +4 more
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An improved Quasi-Z source inverter control system
2020 IEEE 4th Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2020This paper briefly describes the topology of a quasi-Z source inverter. According to the application of the actual situation, an improved PWM technology is proposed in this paper, and a brief analysis of the improved PWM technology is made. In this paper, the traditional maximum boost SPWM control technology is improved, combined with the three-phase ...
Wenyu Yi, Xiju Zong, Yiming Liu
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The Design of Quasi-Z-Source Boost Converter
Applied Mechanics and Materials, 2014According to analyzing the basic principle of intrinsically safe output quasi-Z-source Boost Converter, this topology can be modeled. When the quasi-Z-source network parameters Lz and Cz are much smaller than conventional converter parameter LC, transfer function can be order-reduced.
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An Improved switched-inductor quasi-Z-source inverter
2013 1st International Future Energy Electronics Conference (IFEEC), 2013This paper has presented an improved switched-inductor quasi-Z-source inverter (SL-qZSI). Compared with the classic SL-qZSI, the boost ability of proposed topology is significantly strengthened. The operation principle of the proposed topology is analyzed in detail.
Kai Deng +4 more
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