Couplings in Phase Domain Impedance Modeling of Grid-Connected Converters
Couplings in Phase Domain Impedance Modeling of Grid-Connected Converters
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DOI：
10.1109/tpel.2016.2542244
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发表时间：
2016-03
影响因子：
6.7
通讯作者：
Mohammad Kazem Bakhshizadeh;Xiongfei Wang;F. Blaabjerg;J. Hjerrild;L. Kocewiak;C. Bak;Bo Hesselbak
中科院分区：
文献类型：
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作者：
Mohammad Kazem Bakhshizadeh;Xiongfei Wang;F. Blaabjerg;J. Hjerrild;L. Kocewiak;C. Bak;Bo Hesselbak
功率变换器的输出阻抗在变换器的稳定性评估中起着重要作用。阻抗可以用不同的坐标系来表示，例如静止坐标系（相域）或同步坐标系（dq域）。为了像对待单相系统一样对待三相系统，可以在相域中将系统划分为正序和负序。本文证明了由于锁相环的存在，即使在平衡系统中，正序和负序之间也存在耦合，这对同步是重要的。此外，它将表明，即使这些耦合是非常小的幅度，他们是重要的转换器的稳定性。
The output impedance of a power converter plays an important role in the stability assessment of the converter. The impedance can be expressed in different frames such as the stationary frame (phase domain) or in the synchronous frame (dq domain). To treat the three-phase system like a single-phase system, the system can be divided into positive and negative sequences in the phase domain. This paper demonstrates that there exist couplings between the positive and negative sequences, even in a balanced system due to the PLL, which is important for synchronization. Further it will be shown that even though these couplings are very small in magnitude, they are important in the stability of the converter.