An Adaptive Quadrature Signal Generation-Based Single-Phase Phase-Locked Loop for Grid-Connected Applications

Golestan, Saeed; Guerrero, Josep M.; Abusorrah, Abdullah; Al-Hindawi, Mohammed M.; Al‐Turki, Yusuf

doi:10.1109/tie.2016.2555280

Cited by 82 publications

(69 citation statements)

References 19 publications

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“…Usually, PLL is used to detect voltage information [21,22]. The conventional PLL controller uses phase information to calculate the frequency of PV inverter output voltage after every line cycle, and has shown a relatively low accuracy [23][24][25][26][27][28].…”

Section: System Configurationmentioning

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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Section: System Configurationmentioning

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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“…The MCF-PLL cannot completely block the disturbance components if the grid voltage frequency changes [23][24][25]. In such cases, MCF-PLL needs to adjust the sampling order, according to the variations in the grid voltage's frequency.…”

Section: Famcf-pll Realizationmentioning

confidence: 99%

“…The second-order generalized integral (SOGI) based PLL has a strong, steady-state performance and a fast and dynamic response, but the digital implementation is complex [16,17]. The first-order comb filter (CF) is a linear-phase, finite-impulse-response (FIR) filter that can realize the ideal low-pass filter (LPF) characteristic, and is a widely-used technique in PLLs due to its simple digital realization and low computational burden [18][19][20][21][22][23][24][25]; furthermore, the first-order CF is equivalent to a moving average filter (MAF). In Reference [22], small-signal modeling of an SRF-PLL with an MAF-based prefiltering was introduced so as to compensate for the phase and amplitude errors of MAF-PLL in the presence of frequency drifts.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Adaptive Modified Comb-Filter-Based Phase-Locked Loop for a Doubly-Fed Adjustable-Speed Pumped-Storage Hydropower Plant under Distorted Grid Conditions

2017

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Abstract:The control system of a doubly-fed adjustable-speed pumped-storage hydropower plant needs phase-locked loops (PLLs) to obtain the phase angle of grid voltage. The main drawback of a comb-filter-based phase-locked loop (CF-PLL) is the slow dynamic response. This paper presents a modified comb-filter-based phase-locked loop (MCF-PLL) by improving the pole-zero pattern of the comb filter, and gives the parameters' setting method of the controller, based on the discrete model of MCF-PLL. In order to improve the disturbance resistibility of MCF-PLL when the power grid's frequency changes, this paper proposes a frequency-adaptive modified, comb-filter-based, phase-locked loop (FAMCF-PLL) and its digital implementation scheme. Experimental results show that FAMCF-PLL has good steady-state and dynamic performance under distorted grid conditions. Furthermore, FAMCF-PLL can determine the phase angle of the grid voltage, which is locked when it is applied to a doubly-fed adjustable-speed pumped-storage hydropower experimental platform.

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“…Dynamic performance and stability of PLL may be influenced by various factors. In some previous papers [10][11][12][13][14][15][16][17], the effect of power quality indexes on the behavior of PLL has been discussed. In these papers, PLL performance affected by network voltage unbalance and harmonics has been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…In these papers, PLL performance affected by network voltage unbalance and harmonics has been investigated. In most of these papers, it has been attempted to design a better PLL to handle more network voltage distortions and harmonics [11][12][13][14][15][16]. However, none of these cases have considered the interaction between the PLL and the microgrid-side parameters, which could be a potential for the instability of the PLL.…”

Section: Introductionmentioning

confidence: 99%

Applying the Taguchi Method for Investigating the Phase-Locked Loop Dynamics Affected by Hybrid Storage System Parameters

2018

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Storage systems play an important role in performance of micro-grids. Storage systems may decrease fluctuations caused by periodic and unpredictable nature of distributed generation resource. Some micro-grids are connected to the network via a grid-interface converter. The phase-locked loop (PLL) is a commonly technique for the grid synchronization of network-connected converters. Various parameters affect the stability of PLL (including the network-side and microgrid-side parameters). The effect of the micro-grid-side parameters on the stability of the PLL has not been studied so far. In this paper, the stability of PLL influenced by microgrid-side parameters has been evaluated after a detailed analytical modeling of micro-grid components (including the production power fluctuations, energy storage system, microgrid-side loads, controller parameters etc.). This paper proposes two new stability analysis criteria for PLL affected by micro-grid and hybrid storage system parameters. Using proposed criteria for stability of PLL, optimized rate of micro-grid and hybrid storage system parameters are obtained using statistical methods (Taguchi approach). Finally, behavior of PLL affected by hybrid storage system is investigated. The simulation results and eigenvalues analysis confirm the theoretical analysis and proposed criteria.

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An Adaptive Quadrature Signal Generation-Based Single-Phase Phase-Locked Loop for Grid-Connected Applications

Cited by 82 publications

References 19 publications

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

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

Frequency-Adaptive Modified Comb-Filter-Based Phase-Locked Loop for a Doubly-Fed Adjustable-Speed Pumped-Storage Hydropower Plant under Distorted Grid Conditions

Applying the Taguchi Method for Investigating the Phase-Locked Loop Dynamics Affected by Hybrid Storage System Parameters

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