Modified one-cycle-controlled three-phase pulsewidth modulation rectifiers with a reduced switching frequency to power line frequency ratio
Modified one-cycle-controlled three-phase pulsewidth modulation rectifiers with a reduced switching frequency to power line frequency ratio
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DOI：
10.1049/iet-pel.2013.0231
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发表时间：
2014-04
影响因子：
2
通讯作者：
Zheng Wei;Xinhong Chen;Jie Chen;C. Gong;Yi Fan;Jiawei Chen
中科院分区：
文献类型：
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作者：
Zheng Wei;Xinhong Chen;Jie Chen;C. Gong;Yi Fan;Jiawei Chen
在具有360-800 Hz线路频率或在公用线路频率（50/60 Hz）下操作的中功率和高功率三相脉宽调制（PWM）整流器应用的飞行器电力系统中，开关频率与电力线路频率的比率将由于线路频率增加或低开关频率而减小。因此，传统的单周控制（OCC）方法可以忽略PWM整流器输入电感上的平均电压降的假设不再成立，这将使系统的功率因数（PF）急剧恶化。为了解决这个问题，在这项研究中，提出了一种改进的OCC方案。所提出的控制方法可以提高输入PF的三相PWM整流器，而不牺牲传统的OCC方案的优点，如没有锁相环和恒定的开关频率。首先推导了考虑输入电感两端电压降的修正OCC法的控制方程。理论分析得到了2.5 kW基于OCC的三相三开关维也纳整流器的实验验证。
In the aircraft power systems with 360-800 Hz line frequency or medium- and high-power three-phase pulse-width modulation (PWM) rectifier applications operating at the utility line frequency (50/60 Hz), the ratio of switching frequency to power line frequency will be reduced because of the increased line frequency or low switching frequency. Therefore the assumptions that the average voltage drop across the input inductor of the PWM rectifiers can be neglected if the conventional one-cycle controlled (OCC) method had been adopted can no longer be true anymore, which will deteriorate the system power factor (PF) dramatically. To solve this issue, a modified OCC scheme is proposed in this study. The proposed control method can improve the input PF of three-phase PWM rectifier without sacrificing the advantages of the conventional OCC scheme, such as no phase-locked loop and constant switching frequency. The control equation of the modified OCC method, which considered the voltage drop across the input inductor, is first derived. The theoretic analysis is supported by the experimental verification performed by a 2.5 kW modified OCC-based three-phase three-switch Vienna rectifier.