Journal article ยท Ahead of Print article
Three-Phase PLL for Grid-Connected Power Converters under Both Amplitude and Phase Unbalanced Conditions
Bangladesh University of Engineering and Technology1
Kansas State University2
University of Wisconsin-Green Bay3
Nanyang Technological University4
Smart Electric Components, Center for Electric Power and Energy, Centers, Technical University of Denmark5
Center for Electric Power and Energy, Centers, Technical University of Denmark6
Department of Electrical Engineering, Technical University of Denmark7
This paper proposes a technique for accurate phase estimation of distorted three-phase grid voltages including unbalanced amplitudes and/or phase angles. An adaptive cascaded delayed signal cancellation (CDSC) strategy is used for the generation of the amplitude balanced three-phase voltages. The CDSC strategy also eliminates both odd and even harmonics from the input voltage.
An algorithm is also reported for removing the phase angle deviations from the three-phase voltages including unbalanced phase angles. Finally, a phase-locked loop (PLL) is applied to estimate the phase angle of the reference phase voltage. It requires only one PLL to estimate three phase angles of the thee-phase voltages, respectively, suffering from the unbalanced amplitudes and phase angles.
It is also immune to harmonic distortions at changeable frequency environment. When compared to the CDSC-PLL and dqCDSC-PLL techniques reported in the technical literature, it can provide improved phase estimation under amplitude and phase unbalanced condition. Simulated and experimental results of the technique are acquired from the MATLAB/Simulink and dSPACE1104 control board platform, respectively, for a number of case studies observed in the grid voltage.
Language: | English |
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Publisher: | IEEE |
Year: | 2019 |
Pages: | 8881-8891 |
ISSN: | 02780046 and 15579948 |
Types: | Journal article and Ahead of Print article |
DOI: | 10.1109/TIE.2019.2893857 |
ORCIDs: | Agelidis, Vassilios , 0000-0002-1560-3846 , 0000-0002-2489-6505 , 0000-0001-5871-0193 and 0000-0001-7914-1209 |