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This paper presents an online estimation scheme for the identification of distribution power system impedance parameters. The proposed scheme is based on an invasive current injection method. The scheme benefits from a fast and accurate adoptive notch filter for the extraction of the ambient voltages and currents and also a frequency domain least squares estimator. The former enhances the scheme by...
This paper introduces an adaptive harmonic current extraction method for use in Active Power Filters (APFs). The method is capable of detecting a selective order of harmonics. This feature is useful where elimination of certain harmonics is of concern. Moreover, the proposed method can successfully detect and track the variations in the frequency of the signal and extract the time-varying harmonics...
This paper reviews different three-phase harmonic detection techniques. These techniques are to extract voltage/current harmonics for use in grid-connected converters. In particular, this paper compares some of the newly developed three-phase harmonics detection techniques in terms of tracking and extracting time-varying harmonics.
This paper presents a control algorithm based on feedback linearization technique for grid-connected three-phase non-dispatchable distributed generation (DG) systems such as a wind or a solar based generator. The power electronic interface is a voltage source inverter (VSI) and the output low-pass filter is an inductance (L) or an inductance-capacitance-inductance (LCL) circuit. The control objectives...
This paper briefly reviews the adaptive notch filter (ANF) based synchronization techniques for single and three-phase converter-interfaced distributed generation (DG) systems. These techniques are compared in terms of their capability in tracking the grid frequency variations in the presence of low order harmonics and unbalance conditions. The techniques introduced in this paper are applicable for...
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