Modified One-Cycle Controlled Bidirectional High-Power-Factor AC-to-DC Converter
Modified One-Cycle Controlled Bidirectional High-Power-Factor AC-to-DC Converter
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DOI：
10.1109/tie.2008.921671
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发表时间：
2008-05
影响因子：
7.7
通讯作者：
D. V. Ghodke;K. Chatterjee;B. G. Fernandes
中科院分区：
文献类型：
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作者：
D. V. Ghodke;K. Chatterjee;B. G. Fernandes
基于单周控制的AC-DC转换器在轻负载条件下以及在逆变模式下都表现出电流控制的不稳定性。提出了一种用于双向AC-DC转换器的改进型单周控制器。合成了与电源电压同相的虚拟电流分量。将该电流分量和实际负载电流之和与锯齿波进行比较，以产生用于开关的选通脉冲。这种修改不仅使转换器在轻负载条件和逆变操作模式下具有稳定性，而且还使转换器能够将其操作从整流模式无缝地转移到逆变模式，反之亦然。为了验证该方案的有效性，进行了详细的仿真研究。为了验证该方案的可行性，在一个2千瓦的实验室样机上进行了详细的实验研究。
AC-to-DC converters based on one-cycle control exhibit instability in current control at light load conditions as well as when they are operating in the inverting mode. In this paper, a modified one-cycle controller for bidirectional AC-to-DC converter is proposed. A fictitious current component in phase with the utility voltage is synthesized. The sum of this current component and the actual load current is compared with the sawtooth waveform to generate the gating pulses for the switches. This modification not only renders stability to the converter at light load conditions and the inverting mode of operations but also enables the converter to seamlessly transfer its operation from the rectifying mode to the inverting mode and vice versa. Detailed simulation studies are carried out to verify the effectiveness of the proposed scheme. To validate the viability of the scheme, detailed experimental studies are carried out on a 2-kW laboratory prototype.