A novel synchronization scheme for grid-connected converters by using adaptive linear optimal filter based PLL (ALOF-PLL).
Simulation Modelling Practice and Theory 01/2009; 17:1299-1345. pp.1299-1345
Article: Design and Tuning of a Modified Power-Based PLL for Single-Phase Grid-Connected Power Conditioning Systems[show abstract] [hide abstract]
ABSTRACT: One of the most important aspects for the proper op-eration of the single-phase grid-tied power-conditioning systems is the synchronization with the utility grid. Among various synchro-nization techniques, phase locked loop (PLL)-based algorithms have found a lot of interest for the advantages they present. Typ-ically, the single-phase PLLs use a sinusoidal multiplier as the phase detector (PD). These PLLs are generally referred to as the power-based PLL (pPLL). In this paper, the drawbacks associated with the pPLL technique (i.e., the sensitivity to the grid voltage variations, and the double-frequency oscillations that appear in the estimated phase/frequency) are discussed in detail, and some of the previously reported solutions are examined. Then, to over-come these drawbacks, a simple and effective technique, called the double-frequency and amplitude compensation (DFAC) method is proposed. The effectiveness of the proposed method is evalu-ated through a detailed mathematical analysis. A systematic design method to fine-tune the PLL parameters is then suggested, which guarantees a fast transient response, a high disturbance rejection capability, and a robust performance. Finally, the simulation and experimental results are presented, which highlight the effective-ness of the proposed PLL. Index Terms—Frequency estimation, phase estimation, phase-locked loop (PLL), power-based PLL (pPLL), single phase grid-connected converters, synchronization.IEEE Transactions on Power Electronics 01/2012; 27. · 4.65 Impact Factor
[show abstract] [hide abstract]
ABSTRACT: In grid-connected applications, the synchronous ref-erence frame phase-locked loop (SRF-PLL) is a commonly used synchronization technique due to the advantages it offers such as ease of implementation and robust performance. Un-der ideal grid conditions, the SRF-PLL enables a fast and accu-rate phase/frequency detection; however, unbalanced and distorted grid conditions highly degrade its performance. To overcome this drawback, several advanced PLLs have been proposed, such as the multiple reference frame-based PLL, the dual second-order gener-alized integrator-based PLL, and the multiple complex coefficient filter-based PLL. In this paper, a comprehensive design-oriented study of these advanced PLLs is presented. The starting point of this study is to derive the small-signal model of the aforementioned PLLs, which simplifies the parameter design and the stability anal-ysis. Then, a systematic design procedure to fine tune the PLLs pa-rameters is presented. The stability margin, the transient response, and the disturbance rejection capability are the key factors that are considered in the design procedure. Finally, the experimental re-sults are presented to support the theoretical analysis. Index Terms—Dual second-order generalized integrator (DSOGI), multiple complex coefficient filter (MCCF), multiple reference frame (MRF), phase-locked loop (PLL), synchronous reference frame (SRF), synchronization, three-phase grid-connected converters.IEEE Transactions on Power Electronics 01/2013; 28. · 4.65 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.