Centralized Control of Distributed Single-Phase Inverters Arbitrarily Connected to Three-Phase Four-Wire Microgrids

Author(s)

Brandao, Danilo I. ; Caldognetto, Tommaso ; Marafao, Fernando P. ; Simoes, Marcelo G. ; Pomilio, Jose A. ; Tenti, Paolo

• Document type: Journal article
• Source: IEEE TRANSACTIONS ON SMART GRID; v. 8, n. 1, p. 437-446, JAN 2017.
• Web of Science Citations: 17

Abstract

This paper proposes an effective technique to control the power flow among different phases of a three-phase four-wire distribution power system by means of single-phase converters arbitrarily connected among the phases. The aim is to enhance the power quality at the point-of-common-coupling of a microgrid, improve voltage profile through the lines, and reduce the overall distribution losses. The technique is based on a master/slave organization where the distributed single-phase converters act as slave units driven by a centralized master controller. Active, reactive, and unbalance power terms are processed by the master controller and shared proportionally among distributed energy resources to achieve the compensation target at the point-of-common-coupling. The proposed control technique is evaluated in simulation considering the model of a real urban power distribution grid under non-sinusoidal and asymmetrical voltage conditions. The main results, concerning both steady-state and transient conditions, are finally reported and discussed. (AU)

• FAPESP's process: 12/14014-0 - Autonomous and intelligent distributed energy systems
• Grantee: Fernando Pinhabel Marafão
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 13/21922-3 - Study and development of a cooperative control system applied to distributed DC-AC converters connected to a residential grid
• Grantee: Danilo Iglesias Brandão
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate