A selective harmonic compensation and power control approach exploiting distributed electronic converters in microgrids

Author(s)

dos Santos Alonso, Augusto Matheus ^{[1, 2]} ; Brandao, Danilo Iglesias ^[3] ; Caldognetto, Tommaso ^[4] ; Marafao, Fernando Pinhabel ^[1] ; Mattavelli, Paolo ^[4]

Affiliation

^[1] Sao Paulo State Univ UNESP, Grp Automat & Integrated Syst, Av Tres de Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[2] Norwegian Univ Sci & Technol NTNU, Dept Elect Power Engn, OS Bragstads Plass 2, N-7491 Trondheim - Norway

^[3] Fed Univ Minas Gerais UFMG, Grad Program Elect Engn, Av Antonio Carlos 6627, BR-31270901 Belo Horizonte, MG - Brazil

^[4] Univ Padua, Dept Management & Engn, Stradella San Nicola 3, I-36100 Vicenza - Italy

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS; v. 115, FEB 2020.
• Web of Science Citations: 0

Abstract

This paper proposes an approach to obtain harmonic compensation and power control by exploiting the electronic power converters deployed in low-voltage microgrids. By the proposed approach, distributed harmonic current compensation is achieved without interfering with the converter's power exchange involved in interfacing the local energy resources (e.g., renewable sources, storage devices) with the grid. The control framework refers to a master/slave microgrid architecture where distributed power converters play as slave units, coordinated by a centralized controller; the data exchange among agents occurs periodically, concerns current magnitudes only, and can be fulfilled by communication means of limited performance. The paper shows the achievable results in terms of power quality improvements and discusses the challenges related with the aimed objective. The proposed methodology is evaluated by means of simulation and experimental tests on a single-phase low-voltage microgrid prototype comprising nonlinear loads and two converters. Different cases of generation limits, load variations, voltage levels, voltage distortions, and line parameters are considered in the tests reported. In addition, the robustness of the proposed method to non-ideal and faulty communication links is discussed and shown by means of experimental results. (AU)

• FAPESP's process: 18/22172-1 - Experimental validation of a multiobjective strategy to coordinate multifunctional converters in AC low-voltage microgrids
• Grantee: Augusto Matheus dos Santos Alonso
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/24652-8 - Development of a methodology for cooperative control of distributed generators in microgrids with multiple operational considerations
• Grantee: Augusto Matheus dos Santos Alonso
• Support Opportunities: Scholarships in Brazil - Doctorate