Design-Oriented Transient Stability Analysis of PLL-Synchronized Voltage-Source Converters
By Heng Wu, Xiongfei Wang. IEEE transactions on power electronics, 2018
369 citations recorded by the source corpus.
Differing from synchronous generators, there are lack of physical laws governing the synchronization dynamics of voltage-source converters (VSCs). The widely used phase-locked loop (PLL) plays a critical role in maintaining the synchronism of current-controlled VSCs, whose dynamics are highly affected by the power exchange between VSCs and the grid. This article presents a design-oriented analysis on the transient stability of PLL-synchronized VSCs, i.e., the synchronization stability of VSCs under large disturbances, by employing the phase portrait approach. Insights into the stabilizing effects of the first- and second-order PLLs are provided with the quantitative analysis. It is revealed that simply increasing the damping ratio of the second-order PLL may fail to stabilize VSCs during severe grid faults, whereas the first-order PLL can always guarantee the transient stability of VSCs when equilibrium operation points exist. An adaptive PLL that switches between the second-order and the first-order PLL during the fault-occurring/-clearing transient is proposed for preserving both the transient stability and the phase-tracking accuracy. Time-domain simulations and experimental tests, considering both the grid fault and the fault recovery, are performed, and the obtained results validate the theoretical findings.
Subfields: Control and Systems Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/945621f019d9047f0c24f16c8ee74e92bc365b0b
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In Control and Systems Engineering
- Xiongfei Wang
- Frede Blaabjerg
- Heng Wu
- Mads Graungaard Taul
- Fangcheng Liu
- Yicheng Liao
- Lennart Harnefors
- Donghua Pan
In Electrical and Electronic Engineering
- Xiongfei Wang
- Frede Blaabjerg
- Heng Wu
- Mads Graungaard Taul
- Fangcheng Liu
- Yicheng Liao
- Lennart Harnefors
- Donghua Pan
Citations in the corpus
- Grid-Synchronization Stability of Converter-Based Resources—An Overview (2020, background): “This issue is addressed in [22], [70], Fig.”
- Transient Stability of Voltage-Source Converters With Grid-Forming Control: A Design-Oriented Study (2020, background): “grid-following VSCs has been extensively discussed in [25], [39]–[42], which is another topic and beyond the scope of this article.”