无直流电容单PWM型功率变换器整流桥换流控制  

Rectifier Control Strategy of Single-PWM Converter Without DC Capacitor

作　　者：杜海江[1] 杨仁刚[1] 赵凤展[1] 李耀华[2] 

机构地区：[1]中国农业大学信电学院,北京100083 [2]中国科学院电工研究所,北京100080

出　　处：《电工技术学报》2009年第2期121-126,共6页Transactions of China Electrotechnical Society

基　　金：建设部科技支撑计划资助项目(2006BAJ04B06)

摘　　要：无直流电容单PWM型功率变换器是减少大容量无功元件的新型拓扑之一,该功率变换器具有结构简单、电压利用率高、损耗较低等优点,其难点问题是如何实现整流桥安全换流。本文首先对其工作原理进行分析,然后围绕整流桥换流策略、电压利用率、补偿直流电压波动的SVPWM算法等问题进行理论研究,得出了有效的整流桥换流策略和逆变桥修正SVPWM算法,仿真和实验结果表明所设计的算法正确,为该功率变换器实用化奠定了基础。Single-PWM converter without DC capacitor is one of the new power converters with reduced capacitor or reactor, which has many merits, such as simple structure, high voltage utilization, low switch-loss and so on. The key problem of this topology is how to implement safe-commutation of rectifier. Base on analysis of operation principle of this converter, theory research is done about rectifier commutation control, voltage utilization, SVPWM with compensated DC voltage fluctuation of inverter, valid rectifier commutation algorithm and optimized SVPWM technology are derived. Simulation and experiment have validated the designed algorithms, which can be used in practice.

关 键 词：直流电容 功率变换器 整流桥控制策略 零电流换流 电压利用率 谐波畸变率 

分 类 号：TM46[电气工程—电器]