this paper proposes a new method for parameter estimation of distorted single phase signals, through an improved demodulation-based phase tracking incorporated with a frequency adaptation mechanism. the simulation results demonstrate the superiority of the proposed method compared to the conventional sogi (second-order generalized integrator)-based approach, in spite of the dc-offset and harmon...

This paper proposes a new method for parameter estimation of distorted single phase signals, through an improved demodulation-based phase tracking incorporated with a frequency adaptation mechanism. The simulation results demonstrate the superiority of the proposed method compared to the conventional SOGI (Second-Order Generalized Integrator)-based approach, in spite of the dc-offset and harmon...

with conventional control strategy under unbalanced grid conditions, power fluctuations will be generated in the input active power and reactive power of the wind power Grid Connected Inverter (GCI). In this paper, a novel sequence extraction method is proposed in the voltage components decomposition. Based on second order generalized integrator (SOGI) with PLL, a decomposition module with an a...

Grid-interactive power converters are normally synchronized to the grid using phase-locked loops (PLLs). The performance of the PLLs is affected by the non-ideal conditions in the sensed grid voltage such as harmonics, frequency deviations and dc offsets in single-phase systems. In this paper, a single-phase PLL is presented to mitigate the effects of these non-idealities. This PLL is based on ...

In recent years, single-phase frequency-locked loops (FLLs) are gaining more popularity as a signal processing and synchronization tool in wide variety of engineering applications. the power energy area, basic structure designing majority available FLLs is second-order generalized integrator-based FLL (SOGI-FLL), which nonlinear feedback control system. This nonlinearity makes SOGI-FLL analysis...

The controls of most power electronic inverters connected to an electrical system (EPS) rely on the precise determination voltage magnitude, frequency, and phase angle at point common coupling. One widely used approaches for measuring these quantities is phase-locked loop (PLL); however, precision this measurement affected during transients in EPS a function type event architecture PLL. PLLs ba...

Second-order Generalized Integrator (SOGI)-based quadrature-signal-generator (QSG) together with either a phase-locked-loop (PLL) or frequency-locked-loop (FLL) constitute two types of typical synchronization units (i.e., SOGI-PLL and -FLL) that have been widely used in grid-tied converter systems. This article will reveal clarify the stability issue these arising from different implementations...

The SOGI-FLL (second-order generalized-integrator frequency-locked-loop) is a well-known and simple adaptive filter that allows estimation of the parameters grid voltage with small computational burden. However, this structure has shown to be sensitive events sags swell faults, especially deeply distort estimated frequency. In paper an algorithm proposed face fault modifies SOGI-FLLs gains in o...

Sensorless control techniques of electric motor dedicated to vehicles (EVs) offer low-cost and high operating performance. In this paper, a robust speed-sensorless scheme based on second-order generalized integrator-frequency-locked loop method (SOGI-FLL) is proposed with only one current sensor. The SOGI-FLL introduced estimate accurately the angular speed from measured signal. While scalar te...

As transformadas matemáticas utilizadas em Phase-Locked Loops (PLLs) possuem um papel crucial seu desempenho e funcionamento. A depender do formato sinal de entrada da malha controle, dos requisitos nível ruído outros como poder computacional disponível, deve-se se escolher qual topologia adequa melhor a determinada aplicação. Esse artigo irá abordar as filtros mais utilizados nas topologias co...