Phase-Locked Loop Noise Reduction via Phase Detector Implementation for Single-Phase Systems

Thacker, T.; Boroyevich, Dushan; Burgos, Rolando; Wang, Fei

doi:10.1109/tie.2010.2069070

Cited by 175 publications

(70 citation statements)

References 27 publications

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“…In [52,74,76,77] for example, the conventional PI controller is used in the loop filtering stage with an improved adaptive tuning process which adjusts the controller parameters adaptively. Thus, the performance of the PLL is improved.…”

Section: Modified Pi Controllermentioning

confidence: 99%

Three-phase phase-locked loop synchronization algorithms for grid-connected renewable energy systems: A review

Ali

Christofides

Hadjidemetriou

et al. 2018

Renewable and Sustainable Energy Reviews

148

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The increasing penetration of distributed renewable energy sources (RES) requires appropriate control techniques in order to remain interconnected and contribute in a proper way to the overall grid stability, whenever disturbances occur. In addition, the disconnection of RES due to synchronization problems must be avoided as this may result in penalties and loss of energy generation to RES operators. The control of RES mainly depends on the synchronization algorithm, which should be fast and accurately detect the grid voltage status (e.g., phase, amplitude, and frequency). Typically, phase-locked loop (PLL) synchronization techniques are used for the grid voltage monitoring. The design and performance of PLL directly affect the dynamics of the RES grid side converter (GSC). This paper presents the characteristics, design guidelines and features of advanced state-of-the-art PLL-based synchronization algorithms under normal, abnormal and harmonically-distorted grid conditions. Experimental tests on the selected PLL methods under different grid conditions are presented, followed by a comparative benchmarking and selection guide. Finally, corresponding PLL tuning procedures are discussed.

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Section: Modified Pi Controllermentioning

confidence: 99%

Three-phase phase-locked loop synchronization algorithms for grid-connected renewable energy systems: A review

Ali

Christofides

Hadjidemetriou

et al. 2018

Renewable and Sustainable Energy Reviews

148

View full text Add to dashboard Cite

show abstract

“…Delaying a voltage signal by quarter cycles [31], [32] and using a first differential operator [33] are two typical methods for constructing virtual orthogonal signals.…”

Section: A Conventional Methods For Constructing Virtual Orthogonal Smentioning

confidence: 99%

“…The random noise is amplified according to (32) and (34). The amplification factor F dif increases at a high sampling frequency (see Fig.…”

Section: A Conventional Methods For Constructing Virtual Orthogonal Smentioning

confidence: 99%

A Novel Fast Open-loop Phase Locking Scheme Based on Synchronous Reference Frame for Three-phase Non-ideal Power Grids

Xiong¹,

Zhuo²,

Wang³

et al. 2016

Journal of Power Electronics

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Rapid and accurate phase synchronization is critical for the reliable control of grid-tied inverters. However, the commonly used software phase-locked loop methods do not always satisfy the need for high-speed and accurate phase synchronization under severe grid imbalance conditions. To address this problem, this study develops a novel open-loop phase locking scheme based on a synchronous reference frame. The proposed scheme is characterized by remarkable response speed, high accuracy, and easy implementation. It comprises three functional cascaded blocks: fast orthogonal signal generation block, fast fundamental-frequency positive sequence component construction block, and fast phase calculation block. The developed virtual orthogonal signal generation method in the first block, which is characterized by noise immunity and high accuracy, can effectively avoid approximation errors and noise amplification in a wide range of sampling frequencies. In the second block, which is the foundation for achieving fast phase synchronization within 3 ms, the fundamental-frequency positive sequence components of unsymmetrical grid voltages can be achieved with the developed orthogonal signal construction strategy and the symmetrical component method. The real-time grid phase can be consequently obtained in the third block, which is free from self-tuning closed-loop control and thus improves the dynamic performance of the proposed scheme. The proposed scheme is adaptive to severe unsymmetrical grid voltages with sudden changes in magnitude, phase, and/or frequency. Moreover, this scheme is able to eliminate phase errors induced by harmonics and random noise. The validity and utility of the proposed scheme are verified by the experimental results.

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“…The simple Zero Crossing Detection (ZCD) method has been used to obtain voltage phase information by detecting the zero-crossing points of the PV inverter output voltage [16,17]. The ZCD method has several disadvantages, such as low detection speed and possible inaccurate phase information between the two crossing points [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

An Improved Frequency Measurement Method from the Digital PLL Structure for Single-Phase Grid-Connected PV Applications

2018

Electronics

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Abstract:The Phase Locked Loop (PLL) technique has been studied to obtain the phase and frequency information in grid-connected distributed generations for the sake of synchronizing the grid voltage and the inverter output current. In particular, the line frequency information, such as the anti-islanding function, is very important for the grid connection requirement. This paper presents a novel frequency measurement method from the digital PLL control structure for single-phase grid-connected PV applications. The conventional PLL controller uses the phase information to calculate the frequency of PV inverter output voltage after every line cycle and has shown a relatively low accuracy. This paper uses the angular frequency to directly measure the frequency after every line cycle. To verify the validity of the proposed method compared with the conventional method, a simulation was conducted. According to the simulation results, the measurement error of the proposed method is 80 times lower than the conventional one.

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Phase-Locked Loop Noise Reduction via Phase Detector Implementation for Single-Phase Systems

Cited by 175 publications

References 27 publications

Three-phase phase-locked loop synchronization algorithms for grid-connected renewable energy systems: A review

Three-phase phase-locked loop synchronization algorithms for grid-connected renewable energy systems: A review

A Novel Fast Open-loop Phase Locking Scheme Based on Synchronous Reference Frame for Three-phase Non-ideal Power Grids

An Improved Frequency Measurement Method from the Digital PLL Structure for Single-Phase Grid-Connected PV Applications

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