Enhanced single-phase phase locked loop based on complex-coefficient filter

Article

Gautam, Samir, Xiao, Weidong, Ahmad, Hafiz and Lu, Dylan Dah-Chuan. 2022. "Enhanced single-phase phase locked loop based on complex-coefficient filter." IEEE Transactions on Instrumentation and Measurement. 71. https://doi.org/10.1109/TIM.2022.3147891

Article Title	Enhanced single-phase phase locked loop based on complex-coefficient filter
ERA Journal ID	979
Article Category	Article
Authors	Gautam, Samir, Xiao, Weidong, Ahmad, Hafiz and Lu, Dylan Dah-Chuan
Journal Title	IEEE Transactions on Instrumentation and Measurement
Journal Citation	71
Article Number	9001408
Number of Pages	8
Year	2022
Publisher	IEEE (Institute of Electrical and Electronics Engineers)
Place of Publication	United States
ISSN	0018-9456
	1557-9662
Digital Object Identifier (DOI)	https://doi.org/10.1109/TIM.2022.3147891
Web Address (URL)	https://ieeexplore.ieee.org/document/9698020
Abstract	Complex coefficient filters (CCFs) are widely used for phase-locked loop (PLL) in three-phase power systems, while its usage is largely sparse in the single-phase domain. Single-phase CCF-PLLs so far reported in the literature do not yield satisfactory performances at off-nominal frequency conditions, which is a crucial PLL attribute. Whether they are a suitable filtering technique of choice for single-phase PLL is yet to be formally documented in a methodological way. In this regard, this article derives an enhanced version of the single-phase CCF-PLL (ECCF-PLL), which is able to provide accurate estimation of grid parameters in dynamically changing grid frequency environment. The proposed ECCF-PLL is then numerically and experimentally compared with few other single-phase PLLs to gauge its efficacy and suitability. The test shows the advantage of harmonic robustness from ECCF-PLL, which is specifically useful in a weak grid.
Keywords	Complex coefficient filter (CCF); grid interconnection; phase locked loop (PLL); single-phase system; synchronization
Contains Sensitive Content	Does not contain sensitive content
ANZSRC Field of Research 2020	400803. Electrical energy generation (incl. renewables, excl. photovoltaics)
Public Notes	Files associated with this item cannot be displayed due to copyright restrictions.
Byline Affiliations	University of Sydney
	Bangor University, United Kingdom
	University of Technology Sydney

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