Complex-Vector PLL for Enhanced Synchronization with Weak Power Grids

Dongsheng Yang, Xiongfei Wang, Frede Blåbjerg, Fangcheng Liu, Kai Xin, Yunfeng Liu

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4 Citationer (Scopus)
155 Downloads (Pure)

Abstrakt

This paper proposes a complex-vector based phase-locked loop (PLL) that can eliminate the frequency-coupling terms caused by the asymmetric dynamics of the conventional PLL. In the approach, a complex phase angle with both real and imaginary components is introduced, which enables to control the direct- and quadrature-axis components symmetrically. As a result, the original multiple-input multiple-output (MIMO) system can be simplified to single-input-single-output (SISO) complex transfer functions, which greatly facilitates the system stability analysis. Moreover, the dangerous subsynchronous oscillation hazard caused by the frequency coupling of the conventional PLL can be avoided, and SISO impedance shaping technique can be utilized to enhance the grid synchronization stability under the weak grid condition. The complex-vector PLL is verified by both the theoretical analysis and experimental tests.
OriginalsprogEngelsk
TitelProceedings of 2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)
Antal sider6
ForlagIEEE Press
Publikationsdato10 sep. 2018
Sider1-6
Artikelnummer8459976
ISBN (Trykt)978-1-5386-5542-9
ISBN (Elektronisk)978-1-5386-5541-2
DOI
StatusUdgivet - 10 sep. 2018
Begivenhed19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018 - Padova, Italien
Varighed: 25 jun. 201828 jun. 2018

Konference

Konference19th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2018
LandItalien
ByPadova
Periode25/06/201828/06/2018
NavnIEEE Workshop on Control and Modeling for Power Electronics (COMPEL)
ISSN1093-5142

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