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

Danilo I. Brandao, Tommaso Caldognetto, Fernando P. Marafao, Marcelo G. Simoes, Jose A. Pomilio, Paolo Tenti
2017 IEEE Transactions on Smart Grid  
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
more » ... 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. Index Terms-Line-interactive inverter, master/slave control, microgrid, power flow control, unbalance compensation.
doi:10.1109/tsg.2016.2586744 fatcat:p2r33dosvve7zaa6zspzjgctrm