An Adaptive Quadrature Signal Generation-Based Single-Phase Phase-Locked Loop for Grid-Connected Applications
An Adaptive Quadrature Signal Generation-Based Single-Phase Phase-Locked Loop for Grid-Connected Applications
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DOI：
10.1109/tie.2016.2555280
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发表时间：
2017-04
影响因子：
7.7
通讯作者：
S. Golestan;J. Guerrero;A. Abusorrah;M. Al-Hindawi;Y. Al-Turki
中科院分区：
文献类型：
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作者：
S. Golestan;J. Guerrero;A. Abusorrah;M. Al-Hindawi;Y. Al-Turki
基于正交信号产生的锁相环（QSG-PLL）在单相系统中用于同步目的非常流行。这些PLL之间的主要区别通常在于它们用于创建虚拟正交信号的技术。最流行的QSG方法之一是将原始单相信号延迟四分之一周期。具有这种QSG技术的PLL通常被称为基于传输延迟的PLL（TD-PLL）。TD-PLL具有结构简单、动态响应速度快、电网频率在标称值时检测精度高等优点，但在频率漂移的情况下，其估计量存在相位偏移误差和双频振荡误差。在本文中，一个简单而有效的方法来消除上述误差的TD-PLL的建议。所得到的PLL结构被称为自适应TD-PLL（ATD-PLL）。通过推导ATD-PLL的小信号模型，分析了ATD-PLL的稳定性。参数设计准则。最后，ATD-PLL的有效性，证实了使用数值结果。
The quadrature signal generation-based phase-locked loops (QSG-PLLs) are highly popular for synchronization purposes in single-phase systems. The main difference among these PLLs often lies in the technique they use for creating the fictitious quadrature signal. One of the most popular QSG approaches is delaying the original single-phase signal by a quarter of a cycle. The PLL with such QSG technique is often called the transfer delay-based PLL (TD-PLL). The TD-PLL benefits from a simple structure, rather fast dynamic response, and a good detection accuracy when the grid frequency is at its nominal value, but it suffers from a phase offset error and double-frequency oscillatory error in the estimated quantities in the presence of frequency drifts. In this paper, a simple yet effective approach to remove the aforementioned errors of the TD-PLL is proposed. The resultant PLL structure is called the adaptive TD-PLL (ATD-PLL). The stability of the ATD-PLL is evaluated by the derivation of its small-signal model. Parameter design guidelines are also presented. Finally, the effectiveness of the ATD-PLL is confirmed using numerical results.