Recursive Least Squares-Based Adaptive Parameter Estimation Scheme for Signal Transformation and Grid Synchronization

Achlerkar, Pankaj D.; Panigrahi, Bijaya Ketan

doi:10.1109/jestpe.2020.2970445

Cited by 17 publications

(14 citation statements)

References 24 publications

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“…It is clear that γ , cos(θ), sin(θ) = 0, ∀t, Then from eq. 11and (12), it can be clearly inferred that ε µ = 0. This actually completes the local asymptotic stability of the proposed adaptive observer.…”

Section: Estimation Of Phase and Frequencymentioning

confidence: 95%

“…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%

“…This is computationally demanding. Computational burden is also an issue for least-square estimation based techniques [12], [13]. To overcome the high computational burden, adaptive notch filter (ANF) [14] can be a good alternative.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Estimation Of Phase and Frequencymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…Numerous techniques are available in the literature that deal with fast and accurate frequency estimation. Some popular tools are: phase-locked loop (PLL) ( [1], [2]) frequency-locked loop (FLL) [3], demodulation [4], least-square [5], Kalman filter [6], neural network [7] and so on.…”

Section: Introductionmentioning

confidence: 99%

“…So, additional filters are required. Demodulation [4] and least-square [5] use an initial phase-angle-based technique for frequency estimation. The demodulation technique applies additional moving average filters, and adaptive tuning of the filter's window length can be challenging and computationally demanding.…”

Section: Introductionmentioning

confidence: 99%

A Simple Frequency Estimator for Power Systems

Ahmed

Ushirobira²,

Efimov³

2021

IEEE Trans. Instrum. Meas.

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Fast and accurate frequency estimation of an unbalanced three-phase power system in the presence of measurement offset is a challenging task. A simple to implement and tune method is proposed in this work through a delay-based linearregression framework. Using two challenging scenarios, we verify the performance of our procedure in the presence of severe grid abnormalities, including voltage unbalance, harmonics, frequency jump, and DC offset. Comparative hardware-in-the-loop experimental results demonstrate the suitability of the proposed approach.

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A Novel Adaptive Filtering Technique for Mitigating Disturbances Arising Due to Integration of Renewable Resources and Non-Linear Loads

Ehtesham,

Ahmad,

Ahamad

2024

Advances in Intelligent Systems and Computing

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Recursive Least Squares-Based Adaptive Parameter Estimation Scheme for Signal Transformation and Grid Synchronization

Cited by 17 publications

References 24 publications

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

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

A Simple Frequency Estimator for Power Systems

A Novel Adaptive Filtering Technique for Mitigating Disturbances Arising Due to Integration of Renewable Resources and Non-Linear Loads

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