Grid synchronization techniques play a significant role in integrating renewable energy
sources to the electric power grid. In this context, estimating the phase and frequency of the …

Estimation of amplitude, instantaneous phase, and frequency of a single-phase grid voltage
signal are studied in this letter. The proposed approach uses a novel circular limit cycle …

In this article, an active vibration control technique for direct-current electric motors subjected
to harmonic mechanical load torque is introduced. Formulae to compute uncertain …

This article presents an enhanced frequency adaptive demodulation technique for grid-
synchronization of grid-connected converters in variable frequency condition. Demodulation …

In the presence of nonlinear loads and various disturbances, harmonics and dc bias may
corrupt the grid voltage signal leading to distorted grid. Frequency estimation of distorted …

Many phase-locked loop (PLL) or frequency-locked loop (FLL) use quadrature signals
(directly or indirectly) as the input variables. Generalized integrator (GI) is a popular …

In single‐phase power and energy applications, sliding discrete Fourier transform (SDFT)
filter based quadrature signal generation is a well‐known tool for designing advanced …

Phase-locked loops (PLLs) are widely used for the synchronization of power electronic
based equipment due to their ease of digital implementation and satisfactory response. This …

This Letter proposes demodulation type PLL for phase and frequency estimation of single‐
phase system that can reject DC offset. Using results from the adaptive estimation literature …

Monitoring the voltage frequency is of great significance in power systems. In this paper we
propose two novel frequency estimators, namely the unbalanced HAM-WLS (UHW) …