Comparative study between the improved schemes of MAF-based robust PLLs

Mellouli, Manel; Hamouda, Mahmoud; Slama, Jaleleddine Ben Hadj; Al‐Haddad, Kamal

doi:10.1109/smart.2015.7399224

Cited by 3 publications

(1 citation statement)

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“…Recent techniques for development of high‐performance PLLs have been based on a moving average filter (MAF) [6–12], delayed signal cancellation (DSC) [13–19], complex‐coefficient/complex‐vector filter [20, 21], Fourier transform [22], transfer delay [18, 23, 24] and multiple synchronous reference frame (MSRF)/decoupling network (DN) [25, 26]. The MAF‐based PLLs continue to be developed because they have a simple structure, low computational burden, good stability and high filtering capability [1, 12, 27]. The use of MAF in the control loop causes a large phase delay and decreases the response speed.…”

Section: Introductionmentioning

confidence: 99%

PLL with frequency and initial‐phase‐angle detectors: performance analysis and speed/robustness trade‐off improvement

Zarei

Karimadini

2019

IET Power Electronics

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Phase-locked loops (PLLs) are well known tools for synchronisation and measurement of the fundamental parameters of power grid signals. Signals measured in the electrical industry may contain disturbances such as harmonic distortion, dc offset, noise and unbalanced conditions which destroy the pure sinusoidal form of signals. The present study improves the trade-off between PLL disturbance-rejection capability and dynamic-response speed. An improved PLL is proposed based on frequency and initial-phase-angle detectors (FIPD) and moving average filter for measurement of the signal parameters in both single-phase and three-phase applications. The proposed PLL is called improved FIPD-based PLL (IFIP-PLL) and provides satisfactory disturbance rejection and response time. The proposed structure effectively decreases the estimation error. Simulation and experimental results show the superiority of IFIP-PLL over conventional PLLs.

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