Resonance propagation modeling and analysis of AC filters in a large-scale microgrid
Resonance propagation modeling and analysis of AC filters in a large-scale microgrid
复制标题
大规模微电网中交流滤波器的谐振传播建模与分析
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Cheng Deng
中科院分区：
文献类型：
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作者：
Yusi Liu;C. Farnell;H. Mantooth;J. Balda;R. McCann;Cheng Deng
由于当今大多数配电网都有交流电压，微电网电力电子接口中经常采用低通交流滤波器，将分布式发电机的直流电转换为交流电。与简单的 L 滤波器相比，高阶滤波器（例如 LC 或 LCL 滤波器）更受青睐，因为它们可以更有效地减少开关频率谐波并且尺寸更小。随着转换器额定功率的增加，高阶滤波器引起的谐振问题对微电网的稳定性提出了挑战。本文研究了微电网谐振传播电路模型，其中包括并联多个转换器及其滤波器。每个转换器的额定功率均在 MW 范围内。阐述了转换器控制设计，硬件实验结果验证了设计和建模。
Low-pass ac filters are frequently adopted in microgrid power electronic interfaces that convert distributed generators' dc power to ac power because most of today's distribution grids have ac voltages. Compared to a simple L filter, higher-order filters, such as LC or LCL filters, are preferred due to their more effective reduction of switching-frequency harmonics and smaller sizes. As the converter power ratings increase, resonance problems caused by the higher-order filters challenge microgrid stability. This paper investigates a microgrid resonance propagation circuit model, which includes paralleling multiple converters with their filters. Each converter has a power rating in the MW range. The converter control design is illustrated and hardware experimental results validate the design and modeling.