Frequency domain model for zero-sequence electromagnetic harmonic filter performance analysis

Abstract

Summary Using frequency domain approach, this paper focuses on a zero‐sequence harmonic filter model. The model is based on electromagnetic arrangement created through a three‐legged core construction and zigzag windings that provide a low‐priced, robust and efficient equipment to reduce zero‐sequence fundamental and harmonic distortion. The methodology adopted here provides a useful technique for evaluating the steady‐state operation of the filter with emphasis on its efficiency at reducing harmonics and at identifying the main constructive and electrical parameters of influence on the product performance. The representation is based on sequence harmonic transmittances that were found helpful in estimating the filter operational characteristics under both ideal and non‐ideal conditions. Furthermore, the effectiveness of the filter and its representation are fully validated using an equipment prototype and laboratory results. Copyright © 2014 John Wiley & Sons, Ltd.

New Topology of a Hybrid, Three-Phase, Four-Wire Shunt Active Power Filter

“…Solutions involving passive, active, or hybrid power filters are employed with the aim of reducing or even eliminating the problems caused by harmonic currents, as presented in [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

“…However, when faced with single-phase, linear or non-linear loads, the compensation of the zero-sequence components cannot be performed. Under these conditions, it is intended to perform the compensation of the homopolar components by means of a zero-sequence electromagnetic suppressor (ZSS) [20] composed of a zero-sequence filter (ZSF) [27] and a zero-sequence blocker (ZSB) [28], which are simple, robust, and reliable passive structures, with mastered technological knowledge and well-defined costs.…”

Modeling, design, and experimental test of a zero‐sequence current electromagnetic suppressor

“…[5][6][7][8][9][10] In this situation, some problems are frequently detected, especially the overload of the neutral conductor, overheating of distribution transformers, reduction of the power factor in the power grid, and even interferences in communication systems. [19][20][21] Electromagnetic devices are robust and practically immune to resonance problems 20,21 and, when used in passive or even hybrid arrangements, represent an interesting alternative considering the technical and economic perspectives. [10][11][12][13][14][15][16][17][18] The use of electromagnetic devices has shown to be a promising alternative for the reduction of harmonic components, namely the triplen harmonics, which have a strong zero-sequence concentration.…”

“…[10][11][12][13][14][15][16][17][18] The use of electromagnetic devices has shown to be a promising alternative for the reduction of harmonic components, namely the triplen harmonics, which have a strong zero-sequence concentration. [19][20][21] Electromagnetic devices are robust and practically immune to resonance problems 20,21 and, when used in passive or even hybrid arrangements, represent an interesting alternative considering the technical and economic perspectives.…”

“…Its operation is related to a specific form of zig-zag connection between its six coils that compose the electromagnetic device. [18][19][20] The ZSB acts as a high impedance for the zero-sequence components, connected in series with the power source. 17,21 It is designed using three magnetically coupled coils, implemented in the central column of an EI laminated magnetic core.…”