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Three-phase Voltage-fed Quasi-Z-Source AC-AC Converter
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作者 Xupeng Fang Guanzhong Gao +1 位作者 Lixin Gao Bolong Ma 《CES Transactions on Electrical Machines and Systems》 2018年第3期328-335,共8页
The paper proposes a novel three-phase voltage-fed quasi-Z-source ac-ac converter topology to overcome the shortcomings of the traditional three-phase AC-AC chopper.The quantitative relationship between the output vol... The paper proposes a novel three-phase voltage-fed quasi-Z-source ac-ac converter topology to overcome the shortcomings of the traditional three-phase AC-AC chopper.The quantitative relationship between the output voltage and duty-ratio is deduced by investigating the topology and operating principle.It can provide buck-boost function,and the output voltage of the circuit can keep stable in the case of voltage sagging.Simulation is performed using the MATLAB software,and the experimental circuit is built based on the simulation results,the simulation and experimental results verify the correctness and feasibility of the proposed ac-ac converter topology. 展开更多
关键词 BUCK-BOOST duty-ratio quasi-z-source three-phase ac-ac converter voltage-fed
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A Comparison of Control Methods for Z-Source Inverter 被引量:6
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作者 Cong-Thanh Pham Anwen Shen +2 位作者 Phan Quoc Dzung Nguyen Bao Anh Nguyen Xuan Phu 《Energy and Power Engineering》 2012年第4期187-195,共9页
In recent years, Z-source inverters (ZSI) have been proposed as an replacement power conversion concept which it has both voltage buck and boost abilities. In addition, ZSI doesn’t require dead-time to protection sho... In recent years, Z-source inverters (ZSI) have been proposed as an replacement power conversion concept which it has both voltage buck and boost abilities. In addition, ZSI doesn’t require dead-time to protection short circuit at two switches any of the same phase leg in the inverter bridge and to achieve optimal harmonic of current, voltage. This paper presents two different control methods (CM) for ZSI. The aim of this study to compare between two modulation methods, there are modi?ed space vector pulse width modulation method (MSVM) and the simple boost control (SBC) about the unique harmonic performance features, the total average and peak switching device power of the inverter system. In addition, this paper also analyzes about the ability exceed modulation index in linear region of two CM using MATLAB/Simulink. 展开更多
关键词 BUCK-BOOST Current SOURCE INVERTERS (CSIs) Pulse-Width Modulation (PWM) Voltage SOURCE INVERTERS (VSIs) z-source INVERTERS (ZSI)
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基于CSR和VSI重构的低电压应力三相AC-AC变换器拓扑及参数优化配置研究
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作者 李炳坤 雷家兴 +3 位作者 吉雨洋 张国驹 冯双 陈武 《中国电机工程学报》 北大核心 2025年第23期9337-9348,I0022,共13页
三相AC-AC变换器在现代工业中应用广泛,但传统背靠背电压源变换器和矩阵式变换器等拓扑中晶体管需承受不低于输入线电压幅值的电压应力。因此,为降低晶体管承受的电压应力,文中提出一种基于电流源整流器(current source rectifier,CSR)... 三相AC-AC变换器在现代工业中应用广泛,但传统背靠背电压源变换器和矩阵式变换器等拓扑中晶体管需承受不低于输入线电压幅值的电压应力。因此,为降低晶体管承受的电压应力,文中提出一种基于电流源整流器(current source rectifier,CSR)和电压源逆变器(voltage source inverter,VSI)重构的新型AC-AC变换器拓扑。该拓扑将CSR的直流侧续流二极管和电容分裂,并将中点与输入和输出滤波电容的中性点相连;揭示中性点电位与CSR调制比、输入侧和直流母线滤波电容的数学关系,进而得到CSR晶体管电压应力的解析式,结果表明其存在极小值。因此,通过提出的参数优化配置并结合修正的CSR调制算法,所提拓扑结构中CSR的晶体管电压应力比传统变换器降低50.0%以上。结合CSR的降压特性,VSI的晶体管电压应力也可降低13.4%以上。实验结果验证了所提拓扑的有效性和可行性。 展开更多
关键词 ac-ac变换器 低电压应力 中性点连接 拓扑重构 参数优化配置
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A Comparative Study of Z-source Inverter and Enhanced Topologies 被引量:1
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作者 Tao Li Qiming Cheng 《CES Transactions on Electrical Machines and Systems》 2018年第3期284-288,共5页
This paper does some theoretical analysis and simulation studies on the most common topologies of Z-source inverter.As we all know,the traditional Z-source inverter has some problems,such as the voltage of the capacit... This paper does some theoretical analysis and simulation studies on the most common topologies of Z-source inverter.As we all know,the traditional Z-source inverter has some problems,such as the voltage of the capacitor which belongs to this topology is higher and there is a startup shock,which caused researchers proposed a variety of improved Z-source topologies to solve these problems.Some of these topologies can increase boost capacity,and some can reduce the capacitor voltage.However,these topologies can improve only part of the problems of the traditional Z-source inverter,which leads to that the users are hard to choose which topologies.Faced with this situation,eleven Z-source topologies are analyzed in terms of boost capacity,inductance start-up current,capacitance stress and economy in this paper.Finally,two kinds of promising topologies were gotten. 展开更多
关键词 Terms-Boost capacity INDUCTANCE START-UP current CAPACITANCE stress economy simulation z-source inverter
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Practical Implementation of Embedded Controlled Reduced Switch Z-Source Inverter-Fed Induction Motor Drive 被引量:1
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作者 K. Srinivasan T. Vijayakumar 《Circuits and Systems》 2016年第9期2189-2195,共8页
A cost-effective component minimized embedded controlled Z-source inverter for induction motor drive is presented. The proposed topology combines the advantages of a traditional four-switch three-phase inverter with t... A cost-effective component minimized embedded controlled Z-source inverter for induction motor drive is presented. The proposed topology combines the advantages of a traditional four-switch three-phase inverter with the advantages of the z impedance network (two inductors in series and two X connected capacitors). This new topology, besides the self-boost property, has low switch count and it can operate as a buck-boost inverter. As a result, the new embedded controlled reduced switch Z-source inverter system provides ride through capability during voltage sags, reduces line harmonics, improves power factor, reliability and extends output voltage range. Analysis, simulation and experiment result will be presented to demonstrate these new features. 展开更多
关键词 Embedded Controller Harmonic Distortion Four-Switch Three-Phase Inverter z-source Inverter
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The Control Technology Research of the Z-source Three-phase Four-bridge Arm Inverter
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作者 Xiangli Li Zhaoyang Yan +2 位作者 Keke Pan Chenghao Ma Hanhong Qi 《Energy and Power Engineering》 2013年第4期733-739,共7页
Z-source inverter can boost the voltage of the DC-side, allow the two switches of the same bridge arm conducting at the same time and it has some other advantages. The zero-sequence current flows through the fourth le... Z-source inverter can boost the voltage of the DC-side, allow the two switches of the same bridge arm conducting at the same time and it has some other advantages. The zero-sequence current flows through the fourth leg of the three-phase four-leg inverter so the three-phase four-leg inverter can work with unbalanced load. This paper presents a Z-source three-phase four-leg inverter which combines a Z-source network with three-phase four-leg inverter. The circuit uses simple SPWM modulation technique and the fourth bridge arm uses fully compensated control method. The inverter can maintain a symmetrical output voltage when the proposed scheme under the unbalanced load. 展开更多
关键词 z-source INVERTER THREE-PHASE FOUR-LEG INVERTER Unbalanced Load Imbalanced VOLTAGE
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A Review on Industrial Applications of Z-Source Inverter
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作者 Nimrah Saeed Anas Ibrar Aimen Saeed 《Journal of Power and Energy Engineering》 2017年第9期14-31,共18页
Nowadays, Z-source inverters (ZSI) are one of the most emerging topologies in field of power electronics. This paper deals with brief review of Z-source inverter, comprehensive study of its various topologies and sign... Nowadays, Z-source inverters (ZSI) are one of the most emerging topologies in field of power electronics. This paper deals with brief review of Z-source inverter, comprehensive study of its various topologies and significance of ZSI in modern industry. Different PWM techniques are used to obtain wider modulation range and easier real time implementation. This paper provides a systematic reference for future scientists for further development and advancement of ZSI. 展开更多
关键词 BOOST FACTOR IMPEDANCE Network SHOOT Through State PWM Control Methods z-source INVERTER
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A New Switching Scheme for Z-source Inverter to Minimize Ripples in the Z-source Elements
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作者 Sengodan Thangaprakash Ammasai Krishnan 《International Journal of Automation and computing》 EI 2012年第2期200-210,共11页
This paper presents a modification in pulse width modulation (PWM) scheme with unequal shoot-through distribution for the Z-source inverter (ZSI) which can minimize ripples in the current through the Z-source indu... This paper presents a modification in pulse width modulation (PWM) scheme with unequal shoot-through distribution for the Z-source inverter (ZSI) which can minimize ripples in the current through the Z-source inductors as well as the voltage across the Z-source capacitors. For the same system parameters, the proposed control technique provides better voltage boost across the Z-source capacitor, DC-link, and also the AC output voltage than the traditional PWM. The ripples in the Z-network elements are found to be reduced by 75 % in the proposed modulation scheme with optimum harmonic profile in the AC output. Since the Zqnetwork requirement will be based on the ripple profile of the elements, the Z-network requirements can be greatly reduced. The effectiveness of the proposed modulation scheme has been simulated in Matlab/Simulink software and the results are validated by the experiment in the laboratory. 展开更多
关键词 z-source inverter (ZSI) pulse width modulation (PWM) shoot-through RIPPLES total harmonic distortion.
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Control of Z-Source Inverter Connected to a Single-Phase AC Utility System
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作者 T. Chandrashekar M. Veerachary 《Journal of Energy and Power Engineering》 2011年第5期447-454,共8页
This paper presents a single-phase Z-source inverter as a power conditioning system for a single phase utility connected system. Z-source inverter is a single-stage topology that has buck-boost feature, which is possi... This paper presents a single-phase Z-source inverter as a power conditioning system for a single phase utility connected system. Z-source inverter is a single-stage topology that has buck-boost feature, which is possible because of additional shoot through state introduced in zero state of the conventional inverter pulse width modulation and provides desired output AC voltage. Small distributed generation (DG) system with alternate energy sources requires power conditioning units with low cost, high efficiency and tolerance to wide range of input voltage variation and has to perform various functions such as dc-ac conversion, system control and achieve power quality norms. To meet some of these requirements a two-loop control strategy for ac side control with grid current feedback with PI control and inner filter capacitor current feedback with proportional control and on dc side PID control for Z-source capacitor voltage regulation are employed, which gives good transient response also suppress load and source disturbances effectively. Theoretical analysis of proposed scheme is established and then simulation results are presented to validate proposed control strategy. 展开更多
关键词 BUCK-BOOST z-source inverter distributed generation phase locked loop.
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Closed Loop Control of Bi-Directional Soft Switched Quasi Z-Source DC-DC Converter
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作者 A. Suresh M. R. Rashmi +1 位作者 V. Madusuthanan P. Vinoth Kumar 《Circuits and Systems》 2016年第5期574-584,共11页
Quasi Z-source converter is a single stage soft switched power converter derived from Z-source converter topology, employing an impedance network coupling the source with the converter. The quasi Z-source source conve... Quasi Z-source converter is a single stage soft switched power converter derived from Z-source converter topology, employing an impedance network coupling the source with the converter. The quasi Z-source source converter can buck or boost the voltage and current flow is bidirectional. The duty cycle of the switch can be adjusted to maintain constant voltage during load change. To obtain constant output voltage, proper controller design is a must. This paper presents closed loop control of quasi Z-source converter using PI controller where controller parameters are estimated using the small signal model of the entire system. The transfer function of the system with AC sweep is used to obtain appropriate proportional and integral gain constants to reduce transient dynamics and to reduce steady state error. 展开更多
关键词 Quasi z-source Network PSIM Soft Switching Switching Losses Smart Control PI Controller Design
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Ride through Strategy for a Three-Level Dual Z-Source Inverter Using TRIAC
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作者 A. Nazar Ali Dr. R. Jeyabharath 《Circuits and Systems》 2016年第11期3911-3921,共11页
A new ride through strategy is introduced in a three-level dual Z-source inverter, for isolation under semiconductor switching failure condition. Here the output will have no significant decrease in the amplitude and ... A new ride through strategy is introduced in a three-level dual Z-source inverter, for isolation under semiconductor switching failure condition. Here the output will have no significant decrease in the amplitude and quality. Instead of diodes, the triacs are added to the inverter source ends, as it can perform a bidirectional power transfer also it can operate well in both low and high voltage operating conditions. The faulted part can be isolated by simply altering the firing pulses for turning on/off the triacs using the carrier based SPWM technique and resulting in a boosting output with zero common mode voltage. Consequently, it forms a common floating point or null point with a zero common mode voltage. It is experimentally verified by using MATLAB, and digital oscilloscope. 展开更多
关键词 Common Mode Voltage Fault Compensation Three-Level Inverter Sinusoidal Pulse Width Modulation z-source Inverter
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新型单相高频隔离型Delta源AC-AC变换器
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作者 房绪鹏 赵冰冰 +1 位作者 王煦超 孙翔飞 《电源学报》 北大核心 2025年第2期67-74,共8页
为降低成本、减少器件并保证电路安全运行,提出1种单相隔离型Δ源AC-AC变换器。新型变换器可以提供更宽范围的Buck-Boost输出电压,输入/输出电压可同相或反相,同时可抑制浪涌和谐波电流,提高电路可靠性。对所提电路的工作原理进行分析,... 为降低成本、减少器件并保证电路安全运行,提出1种单相隔离型Δ源AC-AC变换器。新型变换器可以提供更宽范围的Buck-Boost输出电压,输入/输出电压可同相或反相,同时可抑制浪涌和谐波电流,提高电路可靠性。对所提电路的工作原理进行分析,推导得到各工作过程中主要元器件电压及输入/输出电压的关系式,并与其他改进的交流变换器进行对比,从理论上证明了新型交流变换器性能的优越性。根据所设计的参数搭建仿真模型和实验模型进行验证,仿真与实验的结果证实了理论分析的正确性与可行性。 展开更多
关键词 ac-ac 隔离型 高频变压器 Δ源
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单相四开关Z源AC-AC变换器 被引量:7
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作者 汤雨 谢少军 张超华 《南京航空航天大学学报》 EI CAS CSCD 北大核心 2007年第5期576-581,共6页
提出了一种单相四开关Z源AC-AC变换器,它包括电压型与电流型两类。与传统脉宽调制AC-AC变换器相比,它具有如下特点:输出电压范围宽且可升可降,输出电压与输入电压可同相或反相,冲击和谐波电流小,可靠性高。针对AC-AC变换器中固有的开关... 提出了一种单相四开关Z源AC-AC变换器,它包括电压型与电流型两类。与传统脉宽调制AC-AC变换器相比,它具有如下特点:输出电压范围宽且可升可降,输出电压与输入电压可同相或反相,冲击和谐波电流小,可靠性高。针对AC-AC变换器中固有的开关管换流问题,提出了一种适用于单相四开关Z源AC-AC变换器的换流方案,无需外加缓冲吸收电路即可实现开关管的安全换流。以电压型单相四开关Z源AC-AC变换器为例,对其进行了理论分析、仿真和原理试验研究。实验结果证实了Z源变换器的特性及换流方案的可行性。 展开更多
关键词 ac-ac变换器 Z源 换流 固态变压器
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带Z源的高频环节AC-AC变换器 被引量:2
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作者 陈元娣 钱亮 +1 位作者 朱忠尼 余明友 《电工技术学报》 EI CSCD 北大核心 2011年第5期88-94,共7页
提出了一种基于Z源的高频环节AC-AC变换器,它是由输入滤波电路、储能电感、输入周波变换器、高频变压器、输出周波变换器、控制开关、输出滤波器依次级联组成。深入分析研究了这种变换器的稳态原理与移相控制策略。最后进行了仿真和实... 提出了一种基于Z源的高频环节AC-AC变换器,它是由输入滤波电路、储能电感、输入周波变换器、高频变压器、输出周波变换器、控制开关、输出滤波器依次级联组成。深入分析研究了这种变换器的稳态原理与移相控制策略。最后进行了仿真和实验。仿真和实验结果表明,这种变换器具有输出变压(升/降)、频率可变、高频电气隔离、双向功率流、负载适应能力强等优点,为优良性能的智能万用变压器、正弦交流稳压器、调压器、电网补偿器奠定了关键技术基础。 展开更多
关键词 Z源 ac-ac变换器 高频环节 周波变换器
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单相准阻抗源AC-AC变换器 被引量:2
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作者 房绪鹏 许玉林 +1 位作者 赵志远 李辉 《山东科技大学学报(自然科学版)》 CAS 2016年第5期82-86,共5页
为克服传统AC-AC变换器的不足,研究设计了一种新型的准阻抗源AC-AC变换器电路拓扑,分析了该变换器的电路结构、工作原理、电压增益等。采用脉冲宽度调制(PWM)方法来改变电路中双向开关的占空比以调节输出电压,应用Matlab/Simulink下的... 为克服传统AC-AC变换器的不足,研究设计了一种新型的准阻抗源AC-AC变换器电路拓扑,分析了该变换器的电路结构、工作原理、电压增益等。采用脉冲宽度调制(PWM)方法来改变电路中双向开关的占空比以调节输出电压,应用Matlab/Simulink下的仿真模型仿真验证了该电路的电路特性;在此基础上构建了实验电路,进行了相关实验验证。计算机仿真和样机实验结果均验证了理论分析的正确性和电路的可行性。 展开更多
关键词 ac-ac 准阻抗源 脉冲宽度调制 占空比 升降压
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单相直接AC-AC变换器的实现与分析 被引量:5
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作者 万衡 喻嬿 黄道 《华东理工大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第4期414-418,428,共6页
针对传统 AC-DC-AC变换存在的缺陷 ,采用高频调制直接 AC-AC变换技术 ,实现了两种不同结构的单相 AC-AC直接变换器 ,对其特点和仿真结果进行了分析 。
关键词 直接ac-ac变换器 单相电力变换 直接交-交变换器 矩阵变换器 拓扑结构 调制函数
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基于公共低压直流母线AC-AC隔离型模块化多电平级联变换器 被引量:1
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作者 张光烈 宋晓民 +3 位作者 刘闯 裴忠晨 蔡国伟 李辉 《中国电机工程学报》 EI CSCD 北大核心 2021年第21期7464-7475,共12页
文中提出一种新型单级式隔离型模块化多电平级联变换器(isolated modular multilevel cascade converter,I-MMCC),其具有中压三相交流(medium voltage three-phase AC,MVAC_((T-P)))、中压单相交流(medium voltage single phase AC,MVAC... 文中提出一种新型单级式隔离型模块化多电平级联变换器(isolated modular multilevel cascade converter,I-MMCC),其具有中压三相交流(medium voltage three-phase AC,MVAC_((T-P)))、中压单相交流(medium voltage single phase AC,MVAC_((S-P)))和低压直流(low voltage DC,LVDC)3种电压端口。该变换器可实现从LVDC到MVAC的单级式功率变换,MVAC_((T-P))与MVAC_((S-P))电压端口能够实现同频或变频的AC-AC功率自由变换,其单极性调制策略可避免隔离型AC-AC矩阵变换器双向开关管换流暂态过程中出现的电压尖峰等问题。首先,介绍I-MMCC子模块拓扑结构与调制策略,并建立子模块及单相I-MMCC平均等效数学模型;其次,分析MVAC_((T-P))与MVAC_((S-P))端口变频–变压工作原理、稳态功率与端口特性,对单相交流端口基于正交虚拟电路概念,建立控制模型,并推导出MVAC_((S-P))、MVAC_((T-P))端口功率约束关系。最后,通过搭建一套实验样机验证所提出拓扑结构的有效性和优越性。 展开更多
关键词 隔离型模块化多电平级联变换器 单级式ac-ac功率变换 ac-ac变频技术 低频电力传输
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用于分布式电压调控的AC-AC型主动电力弹簧 被引量:2
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作者 刘闯 陈皓楠 +4 位作者 韩子娇 郭东波 蔡国伟 葛延峰 朱炳达 《中国电机工程学报》 EI CSCD 北大核心 2022年第2期737-746,共10页
电力弹簧(electric spring,ES)作为一种电能质量优化装置,对关键负载与非关键负载进行区分使得电力弹簧在对关键负载进行保护时,非关键负载无法运行在其额定电压下,而且其调压能力受到线路参数的限制。针对传统ES在实际电网中工作时的... 电力弹簧(electric spring,ES)作为一种电能质量优化装置,对关键负载与非关键负载进行区分使得电力弹簧在对关键负载进行保护时,非关键负载无法运行在其额定电压下,而且其调压能力受到线路参数的限制。针对传统ES在实际电网中工作时的被动性,文中提出一种基于双极性直接式AC-AC变换器的主动电力弹簧(AC-AC based active electric spring,AC-AES)实现分布式调压。AC-AES不再对关键负载与非关键负载进行区分,对用户负载进行统一控制,从而使其调压变得主动。最后,通过仿真和实验分别验证所提装置通过调节电压调控负载功率的可行性,以及在波动电网中稳定负载电压的能力。 展开更多
关键词 电力弹簧 直接式ac-ac变换 负载功率调控 分布式调压
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三类高频链AC-AC变换器比较研究 被引量:1
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作者 陈道炼 陈艳慧 《电工电能新技术》 CSCD 北大核心 2010年第2期1-4,47,共5页
本文对Buck、Boost、Buck-Boost型三类高频链AC-AC变换器的电路结构与拓扑、控制策略、网侧功率因数、负载短路时的可靠性、输出容量、高频变压器磁化状态和原理试验结果等进行了深入的比较研究,获得了重要结论。高频链AC-AC变换器电路... 本文对Buck、Boost、Buck-Boost型三类高频链AC-AC变换器的电路结构与拓扑、控制策略、网侧功率因数、负载短路时的可靠性、输出容量、高频变压器磁化状态和原理试验结果等进行了深入的比较研究,获得了重要结论。高频链AC-AC变换器电路结构,是由输入滤波器、储能电感(Boost型)、输入周波变换器、高频变压器或高频储能式变压器、输出周波变换器、输出滤波器依序级联而成。研究结果表明,三类高频链AC-AC变换器具有不同的特点、工程实现难易性和应用场合,为实现新型的正弦交流稳压器、交流调压器、电子变压器和同频波形变换器等奠定了关键技术基础。 展开更多
关键词 ac-ac变换器 高频链 BUCK型 BOOST型 Buck-Boost型 性能比较
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三类高频链AC-AC变换器比较研究 被引量:1
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作者 陈道炼 陈艳慧 《电工电能新技术》 CSCD 北大核心 2010年第1期40-40,47,共1页
摘要:本文对Buck、Boost、Buck-Boost型三类高频链AC.AC变换器的电路结构与拓扑、控制策略、网侧功率因数、负载短路时的可靠性、输出容量、高频变压器磁化状态和原理试验结果等进行了深入的比较研究,获得了重要结论。高频链AC—AC... 摘要:本文对Buck、Boost、Buck-Boost型三类高频链AC.AC变换器的电路结构与拓扑、控制策略、网侧功率因数、负载短路时的可靠性、输出容量、高频变压器磁化状态和原理试验结果等进行了深入的比较研究,获得了重要结论。高频链AC—AC变换器电路结构,是由输入滤波器、储能电感(Boost型)、 展开更多
关键词 ac-ac变换器 高频链 BUCK型 BOOST型 Buck-Boost型 性能比较
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