Modified non-adaptive bandpass filter based phase locked loop

Verma, Anant Kumar; Jarial, R. K.; Rao, U. Mohan

doi:10.1049/el.2020.1227

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…9(b) shows the relative frequency error in the estimated frequency for different changes in grid frequency. The IEC standard 61000-4-7 allows 0.03% tolerance on the estimated frequency [26]. The error in frequency estimation from ECCF is well below the permitted limit and finer than ETD.…”

Section: B Comparative Analysismentioning

confidence: 99%

Enhanced Single-Phase Phase Locked Loop Based on Complex-Coefficient Filter

Gautam

Xiao

Ahmed

et al. 2022

IEEE Trans. Instrum. Meas.

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Section: B Comparative Analysismentioning

confidence: 99%

Enhanced Single-Phase Phase Locked Loop Based on Complex-Coefficient Filter

Gautam

Xiao

Ahmed

et al. 2022

IEEE Trans. Instrum. Meas.

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“…As each OSG has different characteristics to generate an orthogonal signal set, each warrants a distinct frequency fixed configuration and requires separate design and analysis. Such frequency-fixed (FF) OSG filter has been applied to TD-PLL [6], [18], [19], SOGI-PLL [17], [20]- [22], CCF-PLL [11], [23], DFT-PLL [8], [24], and HT-PLL [25]. In contrast, only a few works are reported for frequency-fixed APF-PLL (FFAPF) but are found inadequate in meeting one or the other performance criteria.…”

Section: Introductionmentioning

confidence: 99%

Development of Frequency-Fixed All-Pass Filter-Based Single-Phase Phase-Locked Loop

Gautam

Xiao

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Phase-locked loops (PLL) are widely used in the synchronization of grid interfaced power converters. One solution is based on orthogonal signal generation (OSG), which requires the grid frequency information for their appropriate operation.This paper developed a new solution to achieve the PLL function for single-phase grid interconnection but eradicate additional frequency feedback loops in the traditional architecture of all-pass filter PLL (APF-PLL). Four new topologies are developed along with their small-signal modeling and dynamic analysis. A thorough comparison among them on their dynamic response, steady state accuracy, implementation, and disturbance rejection capability are carried out. Finally, the best approach of frequency-fixed APF-PLL is experimentally evaluated with frequency adaptive APF-PLL and frequency-fixed PLLs belonging to time-delay (TD), and second-order generalized intergrator (SOGI) families.

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“…Conventional fractional delay systems are allpass linear phase finite impulse response filters [8]. As they are linear and non-adaptive [9], the choice of the predefined filters has a great effect on the acquired samples. Moreover, as the filters are allpass, these filters are with the low noise immunities.…”

Section: Introductionmentioning

confidence: 99%

Performing fractional delay via fractional singular spectrum analysis

Zhou

Ling

Huang

et al. 2021

SIViP

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This paper proposes a fractional singular spectrum analysis (SSA) based method for performing the fractional delay. First, the input sequence is divided into two overlapping sequences with the first sequence being the input sequence without its last point and the second sequence being the input sequence without its first point. Then, the singular value decompositions (SVD) are performed on the trajectory matrices constructed based on these two sequences. Next, the designs of both the right unitary matrix and the left unitary matrix for generating the new trajectory matrix are formulated as the quadratically constrained quadratic programing problems. The analytical solutions of these quadratically constrained quadratic programing problems are derived via the SVD approach. Finally, the fractional SSA components are obtained by performing the diagonal averaging operation and the fractional delay sequence is obtained by summing up all the fractional SSA components together. Since the fractional SSA operations are nonlinear and adaptive, our proposed method is a kind of nonlinear and adaptive approach for performing the fractional delay. Besides, by discarding some fractional SSA components, the joint fractional delay operation and the denoising operation can be performed simultaneously.

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Modified non-adaptive bandpass filter based phase locked loop

Cited by 8 publications

References 10 publications

Enhanced Single-Phase Phase Locked Loop Based on Complex-Coefficient Filter

Enhanced Single-Phase Phase Locked Loop Based on Complex-Coefficient Filter

Development of Frequency-Fixed All-Pass Filter-Based Single-Phase Phase-Locked Loop

Performing fractional delay via fractional singular spectrum analysis

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