Investigation for harmonic mitigation in the line and neutral currents of three-phase four-wire system feeding two-pulse rectifiers with balanced and unbalanced load using Zig-Zag transformer

2014 ◽  
Author(s):  
A. N. Arvindan ◽  
C. Sanal
Keyword(s):  
Neutral Currents ◽  
Three Phase ◽  
Unbalanced Load ◽  
Harmonic Mitigation ◽  
Wire System

scholarly journals Adaptive Linear Neural Network Approach for Three-Phase Four-Wire Active Power Filtering under Non-Ideal Grid and Unbalanced Load Scenarios

2019 ◽  
Vol 9 (24) ◽  
pp. 5304 ◽  
Author(s):  
Yap Hoon ◽  
Mohd Amran Mohd Radzi ◽  
Ali Saadon Al-Ogaili
Keyword(s):  
Active Power ◽  
Neural Network Approach ◽  
Shunt Active Power Filter ◽  
Selective Filter ◽  
Three Phase ◽  
Unbalanced Load ◽  
Linear Neural Network ◽  
And Performance ◽  
Unbalanced Loads ◽  
Wire System

This paper presents the enhancements performed on the adaptive linear neuron (ADALINE) technique so that it can be applied for active power filtering purposes in a three-phase four-wire system. In the context of active power filtering, the ADALINE technique which was initially developed for a single-phase two-wire system has been further expanded to suit three-phase three-wire system. For both systems, ADALINE techniques have been reported to be effective even when the grid voltage is distorted and/or unbalanced. However, further works that study the possibility to apply ADALINE technique in a three-phase four-wire system which invariably carries unbalanced loads, are rather limited. Hence, in this work, a control algorithm (named as enhanced-ADALINE) which combines the strength of highly selective filter (HSF), ADALINE concept and averaging function is proposed, to manage harmonics mitigation by shunt active power filter (SAPF) under non-ideal grid and unbalanced load scenarios. MATLAB-Simulink software is utilized to conduct an exhaustive simulation study which includes circuit connection of SAPF in a three-phase four-wire system, design of control algorithms, and performance assessments. Benchmarking with the existing algorithm is performed to examine the benefits of using the proposed algorithm. From the analysis, simulation findings are presented and thoroughly discussed to verify design concept, capability, and relevance of the proposed algorithm.

Verification of Characteristics of the Boost-type Matrix Converter for Three-phase Four-wire System

2014 ◽  
Vol 134 (11) ◽  
pp. 939-947 ◽  
Author(s):  
Keiichiro Hirokado ◽  
Naoki Yamamura ◽  
Muneaki Ishida
Keyword(s):  
Matrix Converter ◽  
Three Phase ◽  
Wire System

scholarly journals The Way of Reducing Current Values in Optical Ground Wires at Asymmetrical Faults on Overhead Transmission Lines

2016 ◽  
Vol 11 (1) ◽  
pp. 13-20
Author(s):  
Georgiy Egamnazarov
Keyword(s):  
Cross Section ◽  
Transmission Lines ◽  
Conclusive Evidence ◽  
Fault Current ◽  
Overhead Lines ◽  
Optical Cable ◽  
Electric Power Grid ◽  
Three Phase ◽  
Wire Steel ◽  
Wire System

Abstract Given the fact that the installing costs of an optical ground wire on overhead lines directly depend on its cross-section, which in turn depends on the level of fault current it should withstand, in order to reduce these current values in the optical ground wire, I suggested performing its isolated descents from the end towers of the line with its transition to an optical cable. The research was carried out on the example of a 500 kV overhead line in the National Electric Power Grid. The Method of Symmetrical Components for calculating asymmetrical fault currents was not used; therefore, calculations were carried out on the base of presenting the line as a multi-wire system for the considered case as a five-wire system (optical ground wire, steel ground wire, and three phase wires). Such approach allows taking into account the initial asymmetry of the line parameters and modeling any kind of asymmetrical faults. The analyses of calculated results were performed. The conclusive evidence that the optical ground wire isolated descents from the end towers of the line give the possibility of reducing the level of maximal fault current distribution values in it and therefore its cross section, is presented.

scholarly journals Review of three-phase inverters control for unbalanced load compensation

2019 ◽  
Vol 10 (1) ◽  
pp. 242 ◽  
Author(s):  
Raef Aboelsaud ◽  
A. Ibrahim ◽  
Alexander G. Garganeev
Keyword(s):  
Power Quality ◽  
Control Strategies ◽  
Power Electronic ◽  
Distributed Energy ◽  
Nonlinear Loads ◽  
Load Compensation ◽  
Research Areas ◽  
Three Phase ◽  
Unbalanced Load ◽  
Three Phase Inverter

<span>In the microgrid systems, three-phase inverter becomes the main power electronic interface for renewable distributed energy resources (DERs), especially for the islanded microgrids in which the power quality is easily affected by unbalanced and nonlinear loads, this is due to the fact that the voltage and frequency of the microgrid are not supported by the main power grid but determined only by the inverters. Therefore, the compensation of the load unbalances and harmonics in autonomous microgrid inverters are getting more attention in power quality research areas. The main purpose of this paper is to represent an overview of the control strategies of various inverters for unbalanced load compensation</span>

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