Robust PLL Algorithm for Three-Phase Grid-Connected Converters

Bellini, A.; Bifaretti, Stefano; Iacovone, Vincenzo

doi:10.1080/09398368.2010.11463774

Cited by 13 publications

(15 citation statements)

References 12 publications

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“…To estimate the supply voltage phase angle, θ, a PLL is also needed [20], [21]. In the case of the active rectifier configuration the current reference is calculated on the basis of the desired active and reactive power references, respectively P * and Q * .…”

Section: Overall Control Schemementioning

confidence: 99%

Modulated model predictve control (M<sup>2</sup>PC) for a 3-phase active front-end

Tarisciotti

Zanchetta

Watson

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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One of the main issues with Model Predictive Control (MPC) applied to Power ElectronicsConverters is the ability to select only one output voltage vector which is applied during the whole sampling period. Such mode of operation requires, in order to improve the harmonic content, an increasing of the converter switching frequency which is variable depending on the operating conditions. In order to overcome these issues, whilst preserving all the advantages of MPC, this paper presents a novel Modulated Model Predictive Control, with the aim of obtaining a modulated waveform at the output of the converter without implementing an explicit modulation scheme. The proposed control technique is applied to the current control of a 2-Level, 3-Phase Active Rectifier, validated through simulation and experimental testing and compared to a traditional Model Predictive Control.

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Section: Overall Control Schemementioning

confidence: 99%

Modulated model predictve control (M<sup>2</sup>PC) for a 3-phase active front-end

Tarisciotti

Zanchetta

Watson

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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“…The estimation of angular acceleration is used to determine the Rate Of Change Of Frequency (ROCOF) of the grid without performing an explicit derivative of the frequency. The performances and the robustness of the SSLKF-PLL have been already proven for standard gridconnected systems in [14]- [15]. In this paper the estimations provided by SSLKF-PLL are used to evaluate the performance of different islanding detection methods, such as ROCOF, Sleep Mode frequency Shift (SMS) and a combination of both (SMS+ROCOF).…”

Section: Introductionmentioning

confidence: 99%

Anti-islanding detector based on a robust PLL

Bifaretti

2013

2013 IEEE Energy Conversion Congress and Exposition

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International Standards impose to Distributed Energy Resources, connected to the grid by an inverter, to detect an islanding condition within a suitable time interval. In this paper a Phase Locked Loop (PLL), based on a third-order prediction-correction filter, is proposed to implement an islanding detector with reduced detection time. Such feature is obtained using the estimation of the grid angular frequency and acceleration provided by the PLL with a negligible time delay. The proposed approach is implemented on a DSP and validated through an experimental comparison among different detection methods, such as Rate of Change of Frequency (ROCOF) and Sleep Mode frequency Shift (SMS). A combined use of ROCOF and SMS is also illustrated and discussed. © 2013 IEEE

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“…The prediction correction filter has been already used for utility-connected applications [33]- [34] in which a secondorder filter is sufficient to assure good performance since the grid frequency does not presents significant variations during normal operating conditions. On the contrary, in aircraft power systems, the power supply frequency varies (aircraft standards DO-160E consider a linear variation), so the angular acceleration is not zero during normal operating conditions.…”

Section: Prediction-correction Filtermentioning

confidence: 99%

“…Since the performances of the SSLKF-based PLL has been already proven for standard grid-connected systems in [33]- [34], in this paper the method is experimentally compared with the phase and frequency estimation technique proposed in [35] which adopts a real-time DFT technique as the PLL phase detector. Such choice for the comparison is justified since the DFT technique has been specifically designed for aircraft power systems providing, as shown in [35], superior performances in case of variable frequency power supplies amongst other conventional PLL solutions.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Two Three-Phase PLL Systems for More Electric Aircraft Converters

Bifaretti

Zanchetta

Lavopa

2014

IEEE Trans. Power Electron.

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Abstract-The More Electric Aircraft power system is characterized by variable supply frequency, in general between 360Hz and 900Hz. All equipment on board the aircraft have to operate delivering high performance under this variable frequency condition. In particular, power electronic converters need accurate control algorithms able to track the fundamental phase and frequency in real time, both in normal and unusual conditions. Phase Locked Loop (PLL) based algorithms are commonly used in traditional single and three phase power systems to provide phase and frequency estimations of the supply. Despite the simplicity of those algorithms, large estimation errors can arise when power supply voltage has variable frequency or amplitude, presents unbalances or is polluted with harmonics. To improve the quality of the phase and frequency real-time estimations, a robust PLL algorithm, based on a predictioncorrection filter, is presented in this paper and compared with a Discrete Fourier Transform (DFT) based procedure. The performances of the two algorithms, implemented in a floatingpoint DSP, have been compared through an experimental validation obtained on a laboratory power converter prototype.

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Robust PLL Algorithm for Three-Phase Grid-Connected Converters

Cited by 13 publications

References 12 publications

Modulated model predictve control (M<sup>2</sup>PC) for a 3-phase active front-end

Modulated model predictve control (M<sup>2</sup>PC) for a 3-phase active front-end

Anti-islanding detector based on a robust PLL

Comparison of Two Three-Phase PLL Systems for More Electric Aircraft Converters

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