Optimizing of sampling in a low-cost single-phase instantaneous AC-grid synchronization unit with discrete calculation of derivative function

Galkin, Ilya; Vorobyov, Maxim

doi:10.1109/iecon.2015.7392807

Cited by 24 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PLL with generation of the quadrature signal based on a derivative block (D PLL) [54] has been widely used in the continuous domain [55]. Its digital implementation (Figure 6) produces a very precise result [56], although it requires a numerical approximation to the derived function, following one of the methods shown in Table 2, to reduce the effect of noise.…”

Section: Derivative Pllmentioning

confidence: 99%

Evaluation of Quadrature Signal Generation Methods with Reduced Computational Resources for Grid Synchronization of Single-Phase Power Converters through Phase-Locked Loops

2020

View full text Add to dashboard Cite

Low-cost single-phase grid connected converters require synchronization with the grid voltage to obtain a better response and protection under diverse conditions, such as frequency perturbations and distortion. Phase-locked loops (PLLs) have been used in this scenario. This paper describes a set of quadrature signal generators for single-phase PLLs; compares the performances by means of simulation tests considering diverse operation conditions of the electrical grid; proposes strategies to reduce the computational burden, considering fixed-point digital implementations; and provides both descriptive and quantitative comparisons of the required mathematical operations and memory units for implementation of the analyzed single-phase PLLs.

show abstract

Section: Derivative Pllmentioning

confidence: 99%

Evaluation of Quadrature Signal Generation Methods with Reduced Computational Resources for Grid Synchronization of Single-Phase Power Converters through Phase-Locked Loops

2020

View full text Add to dashboard Cite

show abstract

“…Since the subject of the paper represents an improved QSG, the following is the list of the conventionally applied QSG algorithms: transfer delay-based (TD-QSG), including the non frequency-dependent [18], enhanced [19], and adaptive [20] TD-QSG, (2) inverse Park-based QSG [21], (3) generalized integrator (GI)-based QSG, including the standard second-order GI (SOGI), fxed-frequency SOGI, and SOGI with diferent types of QSG input DC ofset compensation [22][23][24][25], (4) all-pass filters (APF)-based QSG [26], (5) derivative-based QSG [27], (6) sliding discrete Fourier transform-based SDFT QSG [28], and (7) observerbased QSG (OQSG) [29]. When compared to the most commonly used SOGI based QSG, OQSG enables the operation with increased bandwidths and response speeds, which was, however, not used by the OQSG parameter tuning procedure in [29] and was utilized by the OQSG novel parameter tuning procedure proposed in [30].…”

Section: Introductionmentioning

confidence: 99%

Observer-Based Quadrature Signal Generator for UPQC in a Single-Phase Distribution System

Pradeep¹,

Kumar²

2022

ITM Web Conf.

View full text Add to dashboard Cite

This paper presents a control algorithm for generation of reference voltage and current based on Observerbased QSG (Quadrature Signal Generator) for UPQC (Unified Power Quality Conditioner) in a Single-Phase Distribution System. The proposed UPQC is a combination of DSTATCOM and DVR used for load and source compensation such as voltage sag and swell, voltage and current harmonics etc. The proposed control algorithm is capable of generating reference signals from the distorted voltages and currents. In this paper, an improved OQSGbased PLL (Phase-Locked Loop) is utilized over OQSG to enable and operate with increased bandwidths that will improve the dynamic response, tracking accuracy and faster detection of reference signal under all varying load and grid conditions. The control algorithm is tested and evaluated using MATLAB / Simulink.

show abstract

“…In a single-phase system, there is only the information of one-phase voltage, and a fictitious quadrature signal needs to be constructed through a quadrature signal generator (QSG) [5][6][7][8]. There are many methods to achieve this goal, such as the transfer delay (TD) [6], all pass filter (APF) [7,9], Hilbert transformers (HT) [10][11][12], derivative term (DT) [13], inverse Park's transformation (IPT) [2,14], second-order generalised integrator (SOGI) [15][16][17][18][19][20], etc. At off-nominal frequencies, the output signals of IPT and SOGI are still orthogonal but the output signals of TD, APF or DT are not orthogonal [6,9].…”

Section: Introductionmentioning

confidence: 99%

“…© 2020 The Authors. IET Power Electronics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology [13], inverse Park's transformation (IPT) [2,14], second-order generalised integrator (SOGI) [15][16][17][18][19][20], etc. At off-nominal frequencies, the output signals of IPT and SOGI are still orthogonal but the output signals of TD, APF or DT are not orthogonal [6,9].…”

Section: Introductionmentioning

confidence: 99%

Analysis and improvement of fourth‐order generalised integrator based phase‐locked loop

Wang

Xiao

et al. 2020

IET Power Electronics

View full text Add to dashboard Cite

The fourth-order generalised integrator is very suitable for single-phase phase-locked loop because it can provide orthogonal signal conveniently and block harmonic voltages effectively. In the conventional fourth-order generalised integrator based phase-locked loop, the resonance frequency of fourth-order generalised integrator needs to be adjusted according to the grid frequency. To improve the phase-locked loop performance, a non-adaptive fourth-order generalised integrator is suggested for single-phase system, and this paper presents a correction method. According to the estimated grid frequency, the amplitude imbalance and phase error caused by non-adaptive fourth-order generalised integrator can be calculated, and two adaptive units are added to deal with the problems. Moreover, the small-signal model of the proposed phase-locked loop is carried out, and the control parameters are tuned. Compared to conventional fourth-order generalised integrator based phase-locked loop, the proposed phase-locked loop shows a better performance, which is verified through simulation and experimental results. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Optimizing of sampling in a low-cost single-phase instantaneous AC-grid synchronization unit with discrete calculation of derivative function

Cited by 24 publications

References 20 publications

Evaluation of Quadrature Signal Generation Methods with Reduced Computational Resources for Grid Synchronization of Single-Phase Power Converters through Phase-Locked Loops

Evaluation of Quadrature Signal Generation Methods with Reduced Computational Resources for Grid Synchronization of Single-Phase Power Converters through Phase-Locked Loops

Observer-Based Quadrature Signal Generator for UPQC in a Single-Phase Distribution System

Analysis and improvement of fourth‐order generalised integrator based phase‐locked loop

Contact Info

Product

Resources

About