Analysis of the Instantaneous Power Flow for Three-Phase PWM Boost Rectifier Under Unbalanced Supply Voltage Conditions
Analysis of the Instantaneous Power Flow for Three-Phase PWM Boost Rectifier Under Unbalanced Supply Voltage Conditions
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DOI：
10.1109/tpel.2008.925158
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发表时间：
2008-07
影响因子：
6.7
通讯作者：
X. H. Wu;S. K. Panda;Jian-Xin Xu
中科院分区：
文献类型：
--
作者：
X. H. Wu;S. K. Panda;Jian-Xin Xu
本文对三相脉宽调制升压整流器在电源电压不平衡条件下的瞬时功率流进行了分析。导出了瞬时输出功率的解析表达式，给出了输出直流链路电压与瞬时输出功率之间的联系。建立了直流链路电压波动与瞬时输出功率中二次谐波分量之间的直接关系。根据所提供的输入输出瞬时功率解析表达式，可以解释交流电流中奇次谐波分量的存在。为控制直流输出电压，提出了一种简单的级联PI控制方案。该控制器保证在不平衡供电电压工况下，直流链路电压保持恒定，供电侧功率因数接近于单位。在1.6 kva实验室PWM整流器上进行了仿真和实验测试，验证了所提出的分析和控制方案。
This paper proposes the analysis of the instantaneous power flow of three-phase pulse-width modulation (PWM) boost rectifier under unbalanced supply voltage conditions. An analytical expression for the instantaneous output power has been derived, which provides the link between the output dc link voltage and the instantaneous output power. A direct relationship between the dc link voltage ripples and the second harmonic component in the instantaneous output power has been established. Based on the input and output instantaneous power analytical expressions provided, the presence of the odd order harmonic components in the ac line currents can be explained. A simple cascaded PI control scheme has been developed for the dc output voltage control. The controller ensures that the dc link voltage is maintained constant and the supply side power factor is kept close to unity under the unbalanced supply voltage operating conditions. Simulation and experimental test results are provided on a 1.6-kVA laboratory-based PWM rectifier to validate the proposed analysis and control scheme.