Author(s):
dos Santos Alonso, Augusto Matheus [UNESP] ; Brandao, Danilo Iglesias ; Tedeschi, Elisabetta ; Marafão, Fernando Pinhabel [UNESP]
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200432
Origin: Oasisbr
Subject(s): Distributed inverters; Harmonic compensation; Power quality; Power sharing; Three-phase four-wire; Distributed inverters; Distributed inverters; Harmonic compensation; Harmonic compensation; Power quality; Power quality; Power sharing; Power sharing; Three-phase four-wire; Three-phase four-wire
Description
Made available in DSpace on 2020-12-12T02:06:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-01
Norges Forskningsråd
Considering the high penetration of distributed generators in low-voltage grids, establishing a coordinated operation of their grid-tied inverters has become imperative to move towards the implementation of smart grids. Yet, knowing that mitigation of power quality issues such as reactive power, current unbalance and harmonics is of importance within such a context, this work proposes a master/slave control approach, which uses a communication means of low-bandwidth, to flexibly coordinate four-leg inverters dispersed in three-phase four-wire networks. Their coordination is attained by means of a current-based approach, allowing the sharing of active, reactive, harmonic and unbalance currents drawn by loads. The control strategy also regulates the power flow at the point of common coupling of the low-voltage network, while proportionally steering inverters according to their nominal capabilities. In addition to the offering of selective harmonic mitigation, the control approach provides distributed and decoupled unbalance compensation, in partial or total portion, based on concepts from the Conservative Power Theory. Consequently, extraction of sequence components or implementation of virtual impedance control loops are not required. The proposed strategy is evaluated based on multiple simulation results, considering the CIGRE's European low-voltage distribution benchmark, including six distributed inverters, as well as linear and nonlinear loads.
Group of Automation and Integrated Systems Sao Paulo State University (UNESP), Av. Três de Março 511, 18087-180 Sorocaba
Department of Electric Power Engineering Norwegian University of Science & Technology (NTNU), O.S. Bragstads plass 2
Graduate Program in Electrical Engineering Federal University of Minas Gerais (UFMG), Antônio Carlos 6627
Group of Automation and Integrated Systems Sao Paulo State University (UNESP), Av. Três de Março 511, 18087-180 Sorocaba
Norges Forskningsråd: f261735/H30
