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Design and analysis of modern three-phase AC/AC power converters for AC drives and utility interface

机译：用于交流变频器和市电接口的现代三相AC / AC电源转换器的设计和分析

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摘要

Significant advances in modern ac/ac power converter technologies and demandsof industries have reached beyond standard ac/ac power converters with voltage-sourceinverters fed from diode rectifiers. Power electronics converters have been matured tostages toward compact realization, increased high-power handling capability, andimproving utility interface. Modern ac/ac power converter topologies with variouscontrol strategies have been introduced for the further improvements, such as matrixconverters, current-fed converters, PWM rectifiers, and active power filters. In thisdissertation, several new converter topologies are proposed in conjunction withdeveloped control schemes based on the modern ac/ac converters which enhanceperformance and solve the drawbacks of conventional converters.In this study, a new fault-tolerant PWM strategy is first proposed for matrixconverters. The added fault-tolerant scheme would strengthen the matrix convertertechnology for aerospace and military applications. A modulation strategy is developedto reshape output currents for continuous operation, against fault occurrence in matrixconverter drives.This study designs a hybrid, high-performance ac/ac power converter for highpower applications, based on a high-power load commutated inverter and a mediumpowervoltage source inverter. Natural commutation of the load commutated inverter isactively controlled by the voltage source inverter. In addition, the developed hybridsystem ensures sinusoidal output current/voltage waveforms and fast dynamic responsein high power areas.A new topology and control scheme for a six-step current source inverter isproposed. The proposed topology utilizes a small voltage source inverter, to turn offmain thyristor switches, transfer reactive load energy, and limit peak voltages acrossloads. The proposed topology maximizes benefits of the constituent converters: highpowerhandling capability of large thyristor-based current source inverters as well as fastand easy control of small voltage source inverters.This study analyzes, compares, and evaluates two topologies for unity powerfactor and multiple ac/ac power conversions. Theoretical analyses and comparisons ofthe two topologies, grounded on mathematical approaches, are presented from thestandpoint of converter kVA ratings, dc-link voltage requirements, switch ratings,semiconductor losses, and reactive component sizes. Analysis, simulation, andexperimental results are detailed for each proposed topology.
机译：现代化的交流/交流电源转换器技术的重大进步和行业需求已经超越了标准的交流/交流电源转换器，其中二极管整流器提供了电压源逆变器。电力电子转换器已经成熟，可以实现紧凑的实现，增加大功率处理能力并改善公用界面。引入了具有各种控制策略的现代ac / ac电源转换器拓扑以进行进一步的改进，例如矩阵转换器，电流馈电转换器，PWM整流器和有源功率滤波器。本文结合基于现代交流/交流转换器的已开发控制方案，提出了几种新的转换器拓扑结构，这些拓扑结构可以提高性能并解决传统转换器的缺点。本文首先提出了一种新的矩阵转换器容错PWM策略。增加的容错方案将加强用于航空航天和军事应用的矩阵转换器技术。开发了一种调制策略，以调整输出电流的形状以实现连续运行，以防止矩阵转换器驱动器中出现故障。本研究基于大功率负载换向逆变器和中等功率电压源，设计了一种适用于大功率应用的混合型高性能ac / ac电源转换器逆变器。负载换向逆变器的自然换向由电压源逆变器主动控制。此外，开发的混合动力系统可确保在大功率区域内产生正弦输出电流/电压波形并具有快速动态响应。提出了一种六步电流源逆变器的新拓扑和控制方案。拟议的拓扑结构利用小型电压源逆变器来关闭主晶闸管开关，传输无功负载能量，并限制跨负载的峰值电压。拟议的拓扑结构最大程度地发挥了组成转换器的优势：基于可控硅的大型电流源逆变器的高功率处理能力以及对小型电压源逆变器的快速便捷控制。本研究分析，比较和评估了单位功率因数和多个ac / ac的两种拓扑电源转换。从转换器的kVA额定值，直流链路电压要求，开关额定值，半导体损耗和无功元件尺寸的角度出发，基于数学方法对两种拓扑进行了理论分析和比较。详细分析，仿真和实验结果为每个提出的拓扑。

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    Kwak Sangshin;

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  • 年度 2005
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  • 原文格式 PDF
  • 正文语种 en_US
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