Analysis of the Factors Having an Influence on the LC Passive Harmonic Filter Work Efficiency

Chamberlin Stéphane Azebaze Mboving,Andrzej Firlit,Zbigniew Hanzelka

doi:10.3390/en15051894

Chamberlin Stéphane Azebaze Mboving, Andrzej Firlit + Show 1 more

Open Access

https://doi.org/10.3390/en15051894

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Journal: Energies	Publication Date: Mar 4, 2022
Citations: 7	License type: CC BY 4.0

Affiliation: AGH University of Krakow

Abstract

This paper presents the electrical system factors having an influence on the work efficiency and performance of the LC passive harmonic filters (PHFs). Such filters are very often used in industries for the purpose of harmonics mitigation and reactive power compensation. Before their installation in the electrical system, many investigations should be performed in order to ensure their good design as well as work efficiency after connection. In this paper, the factors having an influence on the PHFs work efficiency and performance, such as the grid short-circuit power, primary grid voltage spectrum (voltage measured at the PCC before the filter connection), load reactive power and current characteristic harmonics, manufacturer filter parameters tolerance and filter-detuning phenomena are investigated. Most of the quoted factors are mentioned in the literature, but the novelty of this paper is that, based on the case study example of the single-tuned filter investigated in the laboratory, the influence of those factors on the filter work efficiency are demonstrated, and some solutions and recommendations are proposed. The studies are focused on the design of the single-tuned filter in the laboratory, and some simulation results are presented as well.

Highlights

With the increasing number of non-linear loads as well as distributed electrical energy sources with power electronic interfaces, many solutions in terms of power quality disturbances mitigation are proposed
Despite their disadvantages, passive harmonic filters (PHFs) are commonly used in practice because they are low cost, simple in structure, easy to maintain, highly efficient in terms of individual harmonic reduction, and have easy applicability in low voltage (LV), medium voltage (MV), and high voltage (HV) systems [5–7]
The PHFs are organized in different structures described in the literature [8]: the single-tuned filter [9–16], double-tuned filter [17–28], triple-tuned filter [29,30], series passive filter [31], hybrid passive filter [32,33], damped filters [34–41], filter group [42–49], etc

Summary

Introduction

With the increasing number of non-linear loads as well as distributed electrical energy sources with power electronic interfaces, many solutions in terms of power quality disturbances mitigation are proposed. Active and hybrid solutions are in full growth, and their main drawbacks in comparison to the passive solutions (PHFs) are their high price and complexity in the control system [1–4]. Despite their disadvantages (e.g., harmonics amplification, detuning phenomena, electrical grid dependency of their efficiency, the choice of the damping resistance, etc.), PHFs are commonly used in practice because they are low cost, simple in structure, easy to maintain, highly efficient in terms of individual harmonic reduction, and have easy applicability in low voltage (LV), medium voltage (MV), and high voltage (HV) systems [5–7]. The harmonics, if not mitigated in the electrical system, can cause: the increase in voltage and current true RMS, the overloading, overheating, and even damage of electrical system elements (e.g., transformers, generators, cables, electric motors, capacitors, etc.) and other connected devices, the reduction in a device’s life span, the perturbation of the devices normal operation and increase in operating costs, the inaccurate measurements of energy and power and the decrease in power factor (PF), etc. [54–58]

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