New Synchronization Method For Three-phase Three-wire Pwm Converters Under Unbalanced And Distorted Grid Voltages

2006 ◽  
Vol 11 (1) ◽  
pp. 1-8
Author(s):  
Robinson Figueiredo de Camargo ◽  
Humberto Pinheiro
Keyword(s):  
Pwm Converters ◽  
Synchronization Method ◽  
Distorted Grid ◽  
Three Phase

scholarly journals Improved Frequency Locked Loop Based Synchronization Method for Three-Phase Grid-Connected Inverter under Unbalanced and Distorted Grid Conditions

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1023 ◽  
Author(s):  
Wenjie Ma ◽  
Sen Ouyang ◽  
Weidong Xu
Keyword(s):  
Fundamental Frequency ◽  
Dynamic Performance ◽  
Negative Sequence ◽  
Order Linear ◽  
First Order ◽  
Synchronization Method ◽  
Distorted Grid ◽  
Three Phase ◽  
Simulation And Experiment ◽  
Grid Connected Inverter

To quickly and accurately estimate the parameters of the fundamental positive- and negative-sequence under the unbalanced and distorted grid voltage, a synchronization method is presented in this paper. The proposed method is based on both a harmonic decoupling network consisting of multiple dual second-order generalized integrators (MDSOGIs) and an improved frequency locked loop (IFLL), so it is called the MDSOGI-IFLL. Due to the IFLL, the system has the feature that the dynamic performance of estimating the fundamental frequency is independent of the variation of both the fundamental positive- and negative-sequence voltage. In this paper, a first-order linear frequency adaption model is established for the design of the IFLL. Finally, the good performance of the proposed MDSOGI-IFLL is validated by the simulation and experiment.

Quasi-dual modulation of three-phase PWM converters

1993 ◽  
Vol 29 (2) ◽  
pp. 313-319 ◽  
Author(s):  
J.W. Kolar ◽  
H. Ertl ◽  
F. Zach
Keyword(s):  
Pwm Converters ◽  
Three Phase
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