Direct Power Control of a Pulse Width Modulation Rectifier Using Space Vector Modulation Under Unbalanced Grid Voltages
Direct Power Control of a Pulse Width Modulation Rectifier Using Space Vector Modulation Under Unbalanced Grid Voltages
复制标题
不平衡电网电压下空间矢量调制脉宽调制整流器的直接功率控制
DOI：
10.1109/tpel.2014.2371469
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发表时间：
2015-10
影响因子：
6.7
通讯作者：
Changqi Qu
中科院分区：
文献类型：
--
作者：
Yongchang Zhang;Changqi Qu
与传统的基于表的直接功率控制(DPC)相比，基于空间矢量调制的DPC具有开关频率恒定、有功和无功纹波小等特点。然而，当电网电压不平衡时，传统的DPC-支持向量机表现出严重的电网电流失真。在这项研究中，我们提出了一种新颖而简单的DPC-支持向量机，它在理想和不平衡电网电压条件下都是有效的，它是对原有瞬时功率理论的扩展。在推导出有功功率和无功功率的功率斜率后，解析地推导出了抵消有功功率和无功功率误差的合适的变流器电压基准，并用支持向量机进行了综合。该方法不需要从电网电压/电流或功率补偿中提取复正/负序。与采用原始虚功率的DPC-支持向量机相比，该方法能够获得高度正弦的线路电流，并在不平衡条件下消除有功功率和无功功率的两次网频波动，表现出更好的性能。仿真和实验结果支持了理论研究，证实了该方法的有效性。
Compared with conventional table-based direct power control (DPC), DPC using space vector modulation (DPC-SVM) exhibits several specific features, such as a constant switching frequency and small ripples in both active power and reactive power. However, conventional DPC-SVM exhibits highly distorted grid currents when the grid voltages are unbalanced. In this study, we propose a novel and simple DPC-SVM that is effective under both ideal and unbalanced grid voltage conditions by using an extension of original instantaneous power theory. After deducing the power slopes of both active power and reactive power, the suitable converter voltage reference to nullify the errors of active power and reactive power is analytically derived, which is subsequently synthesized by SVM. The proposed DPC-SVM does not require the extraction of complex positive/negative sequence from the grid voltage/current or power compensation. Compared to prior DPC-SVM using original imaginary power, the proposed method exhibits much better performance by obtaining highly sinusoidal line currents and eliminating twice grid-frequency ripples in both active power and the reactive power under unbalanced conditions. Simulations and experimental results supported the theoretical study and confirmed the effectiveness of the proposed method.
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影响因子：
4.4
作者：
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通讯作者：
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三电平中性点钳位脉宽调制整流器的基于表格的直接功率控制
影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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