A novel robust PLL algorithm applied to the control of a shunt active power filter using a self tuning filter concept

Chedjara, Zakaria; Massoum, Ahmed; Massoum, Sarra; Wira, Patrice; Safa, Ahmed; Gouichiche, Abdelmadjid

doi:10.1109/icit.2018.8352336

Cited by 21 publications

(19 citation statements)

References 16 publications

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“…where t = 1/(a + b). Transfer function (9) shows that low-pass filtering is an inherent property of the estimator. This can be very useful in practical application.…”

Section: Conventional Demodulation-based Technique Requires Two High-mentioning

confidence: 99%

“…In this Letter, our focus is on phase and frequency estimation for single-phase system. Some of the existing techniques for single-phase systems are: Kalman filter [7], adaptive observer [8], phase-locked loop (PLL) [9][10][11][12], enhanced PLL (EPLL) [13,14], adaptive filter-based frequency-locked loop (FLL) [15], and demodulation-based technique [16,17].…”

mentioning

confidence: 99%

“…PLL [9][10][11][12] is undoubtedly the most popular technique available in the literature. Many existing PLL results for single-phase system use the idea of synchronous reference frame-PLL (SRF-PLL) originally proposed for three-phase system.…”

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confidence: 99%

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Demodulation type single‐phase PLL with DC offset rejection

Ahmed

Benbouzid

2020

Electron. lett.

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This Letter proposes demodulation type PLL for phase and frequency estimation of single-phase system that can reject DC offset. Using results from the adaptive estimation literature, this Letter proposes a linear parametric model-based initial phase angle estimation approach. Then by using differentiation and integration operation on the estimated initial phase angle, the frequency is estimated. This avoids the use of any low-pass filter unlike conventional demodulation-based technique. Moreover, unlike existing demodulation-based technique, the proposed technique can completely reject DC offset. Comparative experimental results, provided with state-of-the-art DC offset rejection-based enhanced phase locked-loop, clearly demonstrate the suitability of the proposed technique.

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“…where t = 1/(a + b). Transfer function (9) shows that low-pass filtering is an inherent property of the estimator. This can be very useful in practical application.…”

Section: Conventional Demodulation-based Technique Requires Two High-mentioning

confidence: 99%

mentioning

confidence: 99%

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Demodulation type single‐phase PLL with DC offset rejection

Ahmed

Benbouzid

2020

Electron. lett.

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“…various variants of least-square estimation [12], [13], adaptive notch filter (ANF) [14], various variants of delayed signal cancellation (DSC) techniques [15]- [19], linear observer [20]- [23], harmonic oscillators (linear and nonlinear) [24], [25], various variants of phase-locked loop (PLL) [26]- [30], demodulation-based techniques [31], [32], open-loop techniques [33], [34], etc.…”

Section: Introductionmentioning

confidence: 99%

“…Out of various techniques, PLL [26]- [30] received wide spread attention due to its excellent performances yet having a simple structure. However, in the case of simple PLL, there is a trade-off between disturbance rejection capability and fast dynamic response.…”

Section: Introductionmentioning

confidence: 99%

Coordinate Transformation-Free Observer-Based Adaptive Estimation of Distorted Single-Phase Grid Voltage Signal

et al. 2020

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This paper studies the phase and frequency estimation problem of single-phase grid voltage signal in the presence of DC offset and harmonics. For this purpose, a novel parameterized linear model of the grid voltage signal is considered where the unknown frequency of the grid is considered as the parameter. Based on the developed model, a linear observer (Luenberger type) is proposed. Then using Lyapunov stability theory, an estimator of the unknown grid frequency is developed. In order to deal with the grid harmonics, multiple parallel observers are then proposed. The proposed technique is inspired by other Luenberger observers already proposed in the literature. Those techniques use coordinate transformation that requires real-time matrix inverse calculation. The proposed technique avoids real-time matrix inversion by using a novel state-space model of the grid voltage signal. In comparison to similar other techniques available in the literature, no coordinate transformation is required. This significantly reduces the computational complexity w.r.t. similar other techniques. Comparative experimental results are provided with respect to two other recently proposed nonlinear techniques to show the dynamic performance improvement. Experimental results demonstrate the suitability of the proposed technique.

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