Distributed Power Quality Conditioning System for Three-Phase Four-Wire Low Voltage Networks

This paper presents distributed power quality conditioning system to compensate current and voltage distortions in three-phase four-wire networks caused by unbalanced non-linear single-phase loads. The proposed conditioning system consists of several hybrid filter units installed in various nodes fo...

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Bibliographic Details
Published in:Energies (Basel) 2020-09, Vol.13 (18), p.4915
Main Authors: Dovgun, Valery, Temerbaev, Sergei, Chernyshov, Maxim, Novikov, Viktor, Boyarskaya, Natalia, Gracheva, Elena
Format: Article
Language:English
Subjects:
Compensation
Conditioning
Conductors
Control systems
Design
Filter design (mathematics)
harmonics
hybrid power filter
Low voltage
Neutral conductors
neutral current attenuation
Neutral currents
Optimization
Power
power quality
Spectral analysis
Unbalance
Voltage
Voltage distortion
Wire
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Summary:This paper presents distributed power quality conditioning system to compensate current and voltage distortions in three-phase four-wire networks caused by unbalanced non-linear single-phase loads. The proposed conditioning system consists of several hybrid filter units installed in various nodes for compensation of excessive neutral currents and voltage distortions in a selected area of the distribution network. The system is open and it can be easily modified by installation of new filter units. A novel hybrid filter design procedure based on filter frequency characteristics optimization in the parameters of passive and active parts is presented. A digital system of control signal computation for active filters based on the use of modern methods of spectral analysis is considered. The proposed digital control system enables selective compensation of fundamental and harmonic components. The mathematical model of the proposed power quality conditioning system is developed in the MatLab software. The simulated results show that the presented conditioning system reduces the level of neutral conductor currents and the voltage unbalance as well ensures harmonic compensation in three-phase four-wire networks.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13184915