This paper considers the achievable accuracy in jointly estimating the parameters of a real-valued twodimensional (2-D) homogeneous random field with mixed spectral distribution, from a single observed realization of it. On the basis of a 2-D Wold-like decomposition, the field is represented as a sum of mutually orthogonal components of three types: purely indeterministic, harmonic, and evanesc...

one of the important factors influencing outdoor insulators performance is pollution phenomenon. the pollution, especially during humidity condition, reduces superficial resistance of insulator and lead to a flow of leakage currents (lc) on the insulator surface, which may result in total flashover. the lc characteristics are affected by parameters such as nature and severity of pollution. loca...

This paper presents a maximum-likelihood solution to the general problem of tting a parametric model to observations from a single realization of a 2-D homogeneous random eld with mixed spectral distribution. On the basis of a 2-D Wold-like decomposition, the eld is represented as a sum of mutually orthogonal components of three types: purelyindeterministic, harmonic, and evanescent. The sugges...

The paper deals with a harmonic detection algorithm for hybrid power filters called DQ axis with Fourier (DQF) algorithm. This algorithm is a combination of the advantages of DQ axis method and sliding window Fourier analysis (SWFA). It is flexible and suitable in terms of design for hybrid power filters. This paper also presents the harmonic elimination by using the DQF algorithm for both thre...

A method is proposed that uses a filter bank and an adaptive filter for the harmonic estimation in power signals. Here the amplitudes and frequencies of each harmonic is estimated. A fundamental filter bank (FB) decomposes the input power signal into sub signals and multistage FB is used for higher order harmonic decomposition. An adaptive filter is used to estimate the parameters more accurate...

This paper establishes the force-harmonic coupling model considering phase angle characteristic for analysis and reduction of slot frequency force harmonic PMSMs. Compared with traditional analytical model, significant influence on relationship among components is considered in model. Firstly, deduced based Maxwell stress tensor, contributing to harmonic, these are divided a series combinations...

ICA has recently been applied to naturally-occurring data to uncover hidden fundamental components. Harmonic analysis has long been used to uncover hidden fundamental components of mathematically-defined objects. In my talk I will explore some recent parallelisms between ICA and CHA – fascinating similarities in the “hidden components” that the two subjects are uncovering. I will suggest that r...

The rapid increase of non-linear loads in the last three decades has caused electrical quantities such as voltages and currents in 3-phase distribution systems to become distorted waveforms. This paper reviews, explains and discusses some new concepts, definitions and new available theory in the unbalanced and distorted systems. The usefulness of the proposed practical definitions is investigat...

This paper presents a novel three-phase four-wire low power rating flexible hybrid active filter with a power factor, harmonic and neutral currents capability for distribution systems. The passive filter is tuned to compensate the two largest harmonics components and the power factor of the load. A selective algorithm is employed in order to enable the active filter to compensate only the desir...