Dynamics Assessment of Advanced Single-Phase PLL Structures

Golestan, Saeed; Monfared, Mohammad; Freijedo, Francisco D.; Guerrero, Josep M.

doi:10.1109/tie.2012.2193863

Cited by 309 publications

(177 citation statements)

References 42 publications

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“…In recent years, various estimation methods of grid voltage parameters have been proposed, such as discrete Fourier transform [1], [2], fast Fourier transform [3], Kalman filtering [4], zero-crossing detection [5], [6], least squares estimation [7], adaptive estimation [8], artificial neural networks [9], adaptive notch filter [10]- [13], complex vector filter [14], and phase-locked loop (PLL) [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Accurate Voltage Parameter Estimation for Grid Synchronization in Single-Phase Power Systems

Dai¹,

Lin²,

Tian³

et al. 2016

Journal of Power Electronics

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This paper presents an adaptive observer-based approach to estimate voltage parameters, including frequency, amplitude, and phase angle, for single-phase power systems. In contrast to most existing estimation methods of grid voltage parameters, in this study, grid voltage is treated as a dynamic system related to an unknown grid frequency. Based on adaptive observer theory, a full-order adaptive observer is proposed to estimate voltage parameters. A Lyapunov function-based argument is employed to ensure that the proposed estimation method of voltage parameters has zero steady-state error, even when frequency varies or phase angle jumps significantly. Meanwhile, a reduced-order adaptive observer is designed as the simplified version of the proposed full-order observer. Compared with the frequency-adaptive virtual flux estimation, the proposed adaptive observers exhibit better dynamic response to track the actual grid voltage frequency, amplitude, and phase angle. Simulations and experiments have been conducted to validate the effectiveness of the proposed observers.

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Section: Introductionmentioning

confidence: 99%

Accurate Voltage Parameter Estimation for Grid Synchronization in Single-Phase Power Systems

Dai¹,

Lin²,

Tian³

et al. 2016

Journal of Power Electronics

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“…This paper analyzes the effects of the phase error in SRF-PLL on synchronous dq-axis voltages and output current when the grid frequency varies with the use of APF. To reduce ripple components caused by the phase error, a compensation algorithm based on the proportional resonant (PR) controller is presented [11]- [16]. The effects of phase error could be reduced significantly with the use of the proposed algorithm in the PI controller of SRF-PLL.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Phase Error Effects Due to Grid Frequency Variation of SRF-PLL Based on APF

Seong¹

2016

Journal of Power Electronics

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This paper proposes a compensation algorithm for reducing a specific ripple component on synchronous reference frame phase locked loop (SRF-PLL) in grid-tied single-phase inverters. In general, SRF-PLL, which is based on all-pass filter to generate virtual voltage, is widely used to estimate the grid phase angle in a single-phase system. In reality, the estimated grid phase angle might be distorted because the phase difference between actual and virtual voltages is not 90 degrees. That is, the phase error is caused by the difference between cut-off frequency of all-pass filter and grid frequency under grid frequency variation. Therefore, the effects on phase angle and output current attributed to the phase error are mathematically analyzed in this paper. In addition, the proportional resonant (PR) controller is adapted to reduce the effects of phase error. The validity of the proposed algorithm is verified through several simulations and experiments.

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“…Various synchronization techniques have been proposed in literatures. The zero crossing detection methods [3], the space-vector filtering (SVF) method [4], the artificial neural networks (ANN) method [5], the recursive weighted least-squares estimation (WLSE) algorithm [6], the discrete Fourier transform (DFT) and its modifications [7], the methods based on the concept of adaptive notch filtering (ANF) [8], the Kalman filtering technique [9], the frequency-locked loop (FLL) methods [10], three phase open-loop phase-locked method [11] and the phase-locked loop (PLL) algorithms [12,13] are among the existing synchronization techniques.…”

Section: Introductionmentioning

confidence: 99%

A New PLL Simulation Validation for Three-phase Grid under Heavy Distorted Conditions

Long

Sun²

2015

Int. J. Onl. Eng.

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Abstract-The precision of phase-locked loop (PLL) has a direct effect on the output performance for three-phase grid-connected inverter or three-phase active PFC. In this paper, a new three-phase digital closed-loop phase-locked algorithm is proposed on the basis of synchronous reference frame transformation. Synchronous simulation of the PLL techniques is a good choice even if the polluted three-phase grid such as the harmonics, phase jump and unbalance. Finally, MATLAB digital simulation results prove that the proposed PLL can fast and accurately track the positive sequence fundamental components of three-phase grid voltage.

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Dynamics Assessment of Advanced Single-Phase PLL Structures

Cited by 309 publications

References 42 publications

Accurate Voltage Parameter Estimation for Grid Synchronization in Single-Phase Power Systems

Accurate Voltage Parameter Estimation for Grid Synchronization in Single-Phase Power Systems

Analysis of Phase Error Effects Due to Grid Frequency Variation of SRF-PLL Based on APF

A New PLL Simulation Validation for Three-phase Grid under Heavy Distorted Conditions

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