Indirect dc-link voltage control of two-stage single-phase PV inverter
Indirect dc-link voltage control of two-stage single-phase PV inverter
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DOI：
10.1109/ecce.2009.5316399
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发表时间：
2009-11
期刊：
影响因子：
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通讯作者：
F. Gao;Ding Li;P. Loh;Yi Tang;Peng Wang
中科院分区：
文献类型：
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作者：
F. Gao;Ding Li;P. Loh;Yi Tang;Peng Wang
针对并网两级单相光伏转换系统的应用，提出了一种新的直流间接电压控制方案。传统并网逆变器的控制方法总是直接感知直流电压来调节输出电流，而该方案在不降低逆变器整体性能的前提下，消除了直流电压感知单元。该方案可以很容易地扩展到控制多字符串配置，而不需要额外的控制复杂性。仿真验证了所提控制方案的有效性。
This paper presents a novel indirect dc-link voltage control scheme for the application of grid-tied two-stage single-phase photovoltaic conversion system. Unlike the traditional control method for grid-tied inverters where the dc-link voltage is always directly sensed to regulate the output current, the proposed scheme eliminates the dc-link voltage sensing unit but does not downgrade the inverter overall performance. The proposed scheme can be easily extended to control the multi-string configuration without any extra control complexity needed. Simulation verifications prove the effectiveness of the proposed control scheme.