A DFT-based phase locked loop for phase and amplitude tracking in aircraft electrical systems

Cupertino, Francesco; Salvatore, L.; Lavopa, E.; Sumner, Mark; Zanchetta, Pericle

doi:10.1109/iemdc.2009.5075450

Cited by 3 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Measuring and analyzing the PCC voltage permits then to calculate the reference current which the active filter has to compensate for. First of all, real-time implementation of the Discrete Fourier Transform (DFT) is utilized in order to estimate the fundamental phase angle and the amplitudes and phases of all the harmonic components of interest [10]. The work presented in this paper has been performed for 5 th , 7 th , 11 th and 13 th harmonics but it can be extended in the same way to any other component.…”

Section: Description Of the Techniquementioning

confidence: 99%

Improved voltage harmonic control for sensorless shunt active power filters

et al. 2010

Self Cite

View full text Add to dashboard Cite

A new control method for active filters based only on voltage detection at the Point of Common Coupling (PCC) is proposed. This technique allows using the active filter as a plug-and-play sensorless device, as it is possible to compensate the harmonics produced by the distorting loads just by measuring the PCC voltage, without needing to measure the distorting load current, and just with an approximate knowledge of the grid characteristics. A harmonic extraction structure is designed to calculate the active filter compensating current in the reference frames rotating at different harmonic frequencies. All the harmonic frames are decoupled so to avoid interactions between the control loops. A real-time implementation of Discrete Fourier Transform is utilized for accurate estimation of the fundamental phase and the harmonics amplitudes and phases. No low-pass or band-pass filters are needed for the harmonic identification.

show abstract

Section: Description Of the Techniquementioning

confidence: 99%

Improved voltage harmonic control for sensorless shunt active power filters

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…Different from the phase-locked loop is that it is an open-loop system and without transient process. The phase-locked frequency multiplication measurement methods are actually hardware synchronous measurement method, it uses the frequency of phase-locked frequency multiplication to synchronize the sampling frequency and moment of A/D, once the digital frequency multiplying signal sends a rising edge of pulse ,the sampling circuit will conduct once data sampling [6,7]. The function of auto-adapted compensatory of the high precision frequency tracking technology may reduce the frequency multiplication error effectively; eliminate the calculation error caused by base wave fluctuations [8,9].…”

Section: Related Workmentioning

confidence: 99%

Digital Frequency Multiplying Method for the Power System Frequency Tracking Based on FPGA

Gao

Liu

et al. 2011

AMR

View full text Add to dashboard Cite

The paper propose the digital frequency multiplying method based on frequency de-noising on FPGA, aiming at the frequency aliasing of the high frequency interference in the power system frequency tracking circuit. The basic principle and hardware realization are discussed.The performance of the system is tested using two different system clock, the experiments show that: This method can eliminate the error caused by frequency aliasing, and improve the interference immunity of the system. In addition, experiments also proved that using higher system clock can improve accuracy absolutely.

show abstract

“…Literature contains several examples of control solutions for constant frequency electric aircraft power system networks [6] [7]. The most prominent control algorithms are phase-locked loops (PLLs) [8] and frequency-locked loops (FLLs) [9].…”

Section: Introductionmentioning

confidence: 99%